CA1201036A - Three-way valve for automatic sequencing of fluid flow - Google Patents
Three-way valve for automatic sequencing of fluid flowInfo
- Publication number
- CA1201036A CA1201036A CA000472433A CA472433A CA1201036A CA 1201036 A CA1201036 A CA 1201036A CA 000472433 A CA000472433 A CA 000472433A CA 472433 A CA472433 A CA 472433A CA 1201036 A CA1201036 A CA 1201036A
- Authority
- CA
- Canada
- Prior art keywords
- fluid
- inlet
- recited
- check valve
- passageway
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/02—Access sites
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/0318—Processes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/2496—Self-proportioning or correlating systems
- Y10T137/2559—Self-controlled branched flow systems
- Y10T137/2564—Plural inflows
- Y10T137/2567—Alternate or successive inflows
- Y10T137/2569—Control by depletion of source
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/87571—Multiple inlet with single outlet
- Y10T137/87676—With flow control
- Y10T137/87684—Valve in each inlet
Abstract
THREE-WAY VALVE FOR AUTOMATIC SEQUENCING OF FLUID FLOW
ABSTRACT OF THE INVENTION
A three-way valve for automatic sequencing of fluid flow from a syringe into an IV administration set comprises a housing which forms a fluid chamber having a first and a second inlet and an outlet. A sleeve having a fluid passage-way normally closed by a check valve is slidably disposed within the fluid chamber for reciprocal movement between a first position and a second position for respective fluid sealing engagement with the first and second inlets. With the sleeve in the second position, fluid flows through the chamber from the first inlet to the outlet. Engagement of a syringe with the second inlet urges the sleeve into the first position to permit fluid flow from the syringe into the second inlet and through the chamber to the outlet. Upon emptying of the syringe, the syringe plunger seals the second inlet and urges against a probe that opens the check valve to permit resump-tion of fluid flow from the first inlet to the outlet.
ABSTRACT OF THE INVENTION
A three-way valve for automatic sequencing of fluid flow from a syringe into an IV administration set comprises a housing which forms a fluid chamber having a first and a second inlet and an outlet. A sleeve having a fluid passage-way normally closed by a check valve is slidably disposed within the fluid chamber for reciprocal movement between a first position and a second position for respective fluid sealing engagement with the first and second inlets. With the sleeve in the second position, fluid flows through the chamber from the first inlet to the outlet. Engagement of a syringe with the second inlet urges the sleeve into the first position to permit fluid flow from the syringe into the second inlet and through the chamber to the outlet. Upon emptying of the syringe, the syringe plunger seals the second inlet and urges against a probe that opens the check valve to permit resump-tion of fluid flow from the first inlet to the outlet.
Description
-~ ( 121~)1036 BACKGROUND OF THE INVENTION
3 This invention xelates generally to a three-way 4 valve designed for use with an IV fluid pumping system.
Specifically, this invention pertains to a three-way valve 6 which allows continuous fluid flow to a patient during 7 interruption of fluid flow frorn the original source by per-mitting sequential access of a second fluid source into the 9 existing fluid flow line with an automatic return to the orig-inal source after the pumping of fluid from the second source 11 is completed. This invention is particularly, but not exclu-12 sively, useful for the sequencing of fluid from a syringe into 13 a fluid flow pumping system used in an IV infusion~
18 The use of volumetric pumps to assist in the infu-19 sion of medications to patients is well established ;n the medical field. Several devices have been proposed for this 21 purpose. For example, U.S. Pat. No. 3,985,133 to Jenkins, 22 which is assigned of record to the assignee of the present 23 invention, claims and discloses a volumetric pump which 24 accurately inEuses medic~tions to a patient. 5uch systems, however, are typically designed for the infusion of medica-26 tions from a single fluid source. Thus, whenever an addi-27 tional medical fluid needs to be infused, either the pump must 28 be temporarily shut down while the fluid container in the 29 existing IV system is changed or a separate IV system must be set up. In either case, there may be unacceptable delays.
~r.~
~2~036 1 Such delays, howeve~, can be avoided if the new medical fluid
3 This invention xelates generally to a three-way 4 valve designed for use with an IV fluid pumping system.
Specifically, this invention pertains to a three-way valve 6 which allows continuous fluid flow to a patient during 7 interruption of fluid flow frorn the original source by per-mitting sequential access of a second fluid source into the 9 existing fluid flow line with an automatic return to the orig-inal source after the pumping of fluid from the second source 11 is completed. This invention is particularly, but not exclu-12 sively, useful for the sequencing of fluid from a syringe into 13 a fluid flow pumping system used in an IV infusion~
18 The use of volumetric pumps to assist in the infu-19 sion of medications to patients is well established ;n the medical field. Several devices have been proposed for this 21 purpose. For example, U.S. Pat. No. 3,985,133 to Jenkins, 22 which is assigned of record to the assignee of the present 23 invention, claims and discloses a volumetric pump which 24 accurately inEuses medic~tions to a patient. 5uch systems, however, are typically designed for the infusion of medica-26 tions from a single fluid source. Thus, whenever an addi-27 tional medical fluid needs to be infused, either the pump must 28 be temporarily shut down while the fluid container in the 29 existing IV system is changed or a separate IV system must be set up. In either case, there may be unacceptable delays.
~r.~
~2~036 1 Such delays, howeve~, can be avoided if the new medical fluid
2 can be introduced into the existing fluid delivery system
3 without disassembling or shutting down the ~xisting system.
Several valving devices have been proposed in the 6 prior art for diverting fluid flow from one path to another.
7 One such valve is the manually-operable three-way valve device 8 disclosed in U.S. Pat. No. 3,057,370 to Hamilton. Other 9 valves such as the check valve disclosed in U.S. Pat. No.
3,352,531 to Kilmarx have been proposed which are opened by 11 cooperation with an external structure, such as the tip of a 12 syringe, to establish a fluid passageway. Additional examples 13 of such devices in the medical field are ~.S. Pat. No.
14 3,385,301 to ~arautuneian and U.S. Pat. No. 3,799,171 to Patel.
Another depressor activated device is ~he valve disclosed in 16 U.S. Pat. No. 3,965,910 to Fischer which defines a separate 17 passageway for the addition of a second fluid into an existing 18 fluid pathway during engagement of the depressor. There is~
19 however, still the need for an automatic return to the normal fluid flow of the pre-existing fluid pathway when flow from 21 the second fluid source has been completed.
23 Accordingly, it is an ob~ect of the present inven-24 tion to provide a three-way valve which is simple in operation and allows for easy engagement of a second fluid source into a 26 pre-existing fluid flow line. Another object of the present 27 invention is to provide a cost effective disposable valve for 28 use with a pumping system that will permit the accurate 29 delivery of fluid from either of two separate fluid sources.
It is still another object of the present invention to provide 12~)36 1 a valve which will automatically re-establish the pre-existing 2 fluid pathway after the introduction of fluid from a second 3 source has been completed~ ~
6 SUMMARY OF T~E INVENTION
8 The preferred embodiment of the novel three-way 9 valve for use with an IV pump comprises means for the con-tinuous sequentially alternating infusion of fluids from a 11 fluid contai~er and a syxinge with an automatic return to the 12 fluid container. More specifically, the novel three-way valve 13 comprises a housing which defines a fluid chamber having a 14 first and a second inlet for the access of fluids from the two separate sources and an ou~let. A sleeve assembly, comprising 16 a hollow tubular-shaped sleeve and a check valve positioned to 17 prevent fluid flow through the sleeve, is slidably disposed 18 within the fluid chamber for movement between a first position 19 and a second position. A spring ordinarily urges the sleeve assembly into the second position for fluid sealing engagement 21 with the second inlet. With the sleeve assembly in the second 22 position, a fluid pathway through the housing is defined from 23 the first inlet to the outlet.
Engagement of a syringe with the three-way valve, by 26 insertion of the syringe tip into the second inlet, overcomes 27 the spring bias to move the sleeve assembly from the first 28 position to the second position. This movement urges the 29 sleeve assembly into fluid sealing engagement with the first inlet. With the sleeve assembly in the second position, a (' 12~1036!
1 fluid pathway is defined rom the second inlet to the outlet.
2 When the pumping of fluid from the syringe is co~pleted, the 3 syringe plungex contacts a pro~e extending from the check
Several valving devices have been proposed in the 6 prior art for diverting fluid flow from one path to another.
7 One such valve is the manually-operable three-way valve device 8 disclosed in U.S. Pat. No. 3,057,370 to Hamilton. Other 9 valves such as the check valve disclosed in U.S. Pat. No.
3,352,531 to Kilmarx have been proposed which are opened by 11 cooperation with an external structure, such as the tip of a 12 syringe, to establish a fluid passageway. Additional examples 13 of such devices in the medical field are ~.S. Pat. No.
14 3,385,301 to ~arautuneian and U.S. Pat. No. 3,799,171 to Patel.
Another depressor activated device is ~he valve disclosed in 16 U.S. Pat. No. 3,965,910 to Fischer which defines a separate 17 passageway for the addition of a second fluid into an existing 18 fluid pathway during engagement of the depressor. There is~
19 however, still the need for an automatic return to the normal fluid flow of the pre-existing fluid pathway when flow from 21 the second fluid source has been completed.
23 Accordingly, it is an ob~ect of the present inven-24 tion to provide a three-way valve which is simple in operation and allows for easy engagement of a second fluid source into a 26 pre-existing fluid flow line. Another object of the present 27 invention is to provide a cost effective disposable valve for 28 use with a pumping system that will permit the accurate 29 delivery of fluid from either of two separate fluid sources.
It is still another object of the present invention to provide 12~)36 1 a valve which will automatically re-establish the pre-existing 2 fluid pathway after the introduction of fluid from a second 3 source has been completed~ ~
6 SUMMARY OF T~E INVENTION
8 The preferred embodiment of the novel three-way 9 valve for use with an IV pump comprises means for the con-tinuous sequentially alternating infusion of fluids from a 11 fluid contai~er and a syxinge with an automatic return to the 12 fluid container. More specifically, the novel three-way valve 13 comprises a housing which defines a fluid chamber having a 14 first and a second inlet for the access of fluids from the two separate sources and an ou~let. A sleeve assembly, comprising 16 a hollow tubular-shaped sleeve and a check valve positioned to 17 prevent fluid flow through the sleeve, is slidably disposed 18 within the fluid chamber for movement between a first position 19 and a second position. A spring ordinarily urges the sleeve assembly into the second position for fluid sealing engagement 21 with the second inlet. With the sleeve assembly in the second 22 position, a fluid pathway through the housing is defined from 23 the first inlet to the outlet.
Engagement of a syringe with the three-way valve, by 26 insertion of the syringe tip into the second inlet, overcomes 27 the spring bias to move the sleeve assembly from the first 28 position to the second position. This movement urges the 29 sleeve assembly into fluid sealing engagement with the first inlet. With the sleeve assembly in the second position, a (' 12~1036!
1 fluid pathway is defined rom the second inlet to the outlet.
2 When the pumping of fluid from the syringe is co~pleted, the 3 syringe plungex contacts a pro~e extending from the check
4 valve and causes the check valve to open. Si~ultaneou~ly with the opening of the check valve, the syringe plunger engages in 6 fluid sealing contact with the second inlet. In this con-7 figuration the valve housing re-establishes a fluid passageway 8 from the first inlet to the outlet.
The novel features of this invention as well, as the 11 invention itself, both as to its orgànization and operation 12 will be best understood from the accompanying drawings, taken 13 in conjunction with the accompanying description, in which 14 similar reference characters refer to similar parts, and in which:
Fig. 1 is a perspective view of the three-way valve 21 shown connected with two separate fluid sources, one of which 22 is a syringe;
24 Fig. 2 is a cross-sectional view of a portion of the three-way valve as seen on line 2-2 in Fig. 1 without the 26 syringe attached;
28 Fig. 3 is a cxoss-sectional view of a portion of the 29 three-way valve as seen on line 3-3 in Fig. 2;
36 ( 1 Fig. 4 is a cross-sectional view of a portion of the 2 three-way valve as seen on line 2-2 in Fig. 1 with the three-3 way valve engaged with a syringe during fluid flow from the 4 syringe; and 6 Fig. 5 is a cross-sectional view of a portion of the 7 three-way valve as seen on line 2-2 in Fig. 1 engaged with a 8 syringe after fluid flow from the syringe has been completed.
11 DESCRIPTION OF l~E PREFERRED EMBODIMENT
13 Referring initially to Fig. 1, a three-way valve 14 generally designated 10 is shown connected for fluid communi-cation with a standard IV bottle 12 by an IV tube 20. Also 16 shown connected for fluid comm~lnication with three-way valve 17 10 is a syringe 14. As shown in Fig. 1, IV bottle 12, syringe 18 14 and three-way valve 10 are connected in a manner so that 19 ` fluid from either bottle 12 or syringe 14 can be directed through three-way valve 10 and into IV tube 22 for flow to a 21 fluid volumetric pump ~not shown).
23 In Fig. 2 it is seen that three-way valve 10 includes 24 a housing 28 formed by joining an end portion 24 with a base portion 26 to establish a fluid chamber 54. It should be 26 appreciated that the joining of end portion 24 with base por-27 tion 26 may be accomplished by any means well known in the 28 art, such as by solvent bonding or ultrasonic bonding. Formed onto end portion 24 is a fitment 30 which defines a fluid inlet 48 into fluid chamber 54. Also, for reasons which will _ ~ _ ( ~201Q36 ( 1 subsequently become apparent, fitment 30 is adapted for fluid 2 fluid sealing engagement with IV tube 20.
4 Still referring to Fig. 2, it is seen that base por-tion 26 is formed with a fitment 32 which deines a fluid out-6 let 52 from fluid chamber 54. Fitment 32 is adapted for fluid 7 sealing engagement with IV tube 22. Base portion 26 is also 8 formed with a fitment 34 which defines a fluid inlet 50 into 9 fluid chamber 54. Formed onto the external periphery of fit-ment 34 is a two-point partial thread 36 that permits screw-11 able engagement of three-way valve 10 with syringe 14. It 12 should be understood that fitment 34 may be a standard luer 13 lock.
Slidably disposed in fluid rh~rher 54 is a hollow 16 tubular-shaped ~lexible sleeve 56 forming a fluid passageway 17 58 therethrough. In the preferred embodiment, sleeve 56 is 18 made from an elastomeric material suitable for fluid sealing 19 engagement with base portion 26 and end portion 24. .Within fluid passageway 58 is a shoulder portion 60. As can also be 21 appreciated with reference to Fig. 2, the sl~eve 56 is dimen-22 sioned so that its length is slightly less than the longitudi-23 nal dimensio,n of the fluid chamber 54 to permit slidable 24 reciprocation of the sleeve 56 within the fluid chamber 54.
26 As seen in Fig. 2, a check valve 64 is disposed 27 within the passageway 58 of sleeve 56. The check valve 64 is 28 formed with a stem portion 66 of slightly reduced cross-29 sectional area to define a lip 67. Also formea onto check valve 64 is an abutment 68 which is adapted for ~luid sealing ~Z~ )3ti 1 engagement with shoulder 60 of sleeve 56. As previously 2 discussed sleeve 56 is preferably made of an elastomeric 3 material. Thus, abutment 68 of sleeve 56 is capable of fluid 4 sealing engagement with valve 64. Also included in the struc-ture of check valve 64 is a probe arm 70 which is an integral 6 extension of the check valve 64 and is dimensioned to extend 7 through fluid passageway 58 of sleeve 56 into inlet 50 of fit-8 ment 34 as shown in Fig. 2.
A spring 72 cooperating between the end portion 24 11 of housing 28 and lip 67 of check valve 64 urges the abutment 12 portion 68 of check valve 64 into fluid sealing engagement 13 with the shoulder 60 of sleeve 56. As can also be appreciated 14 by reference to ~ig. 2, the urging of spring 72 against check valve 64 also urges sleeve 56 into a fluid sealiny engagement 16 with base portion 26 of housing 28. This engagement prevents 17 fluid from entering fluid chamber 54 through fluid inlet 50.
18 As can be further appreciated by reference to Fig. 2, this 19 engagement also causes probe arm 70 of check valve 64 to extend into inlet 50.
22 Referring now to Fig. 4, it is seen that syringe 14 23 includes an extension forming a fluid conduit 42. Also, 24 extension 40 is dimensioned to be received within the inlet 50 of fitment 34~ Fluid sealing engagement of the syr;nge 14 26 with three-way valve 10 is secured by a connector 46 that is 27 adapted to threadably engage with thread 36 located on the 28 extexnal periphery of fitment 34. As seen in Fig. 4, both 29 extension 40 and connector 46 of syringe 14 are integral extensions of the wall 38 of syringe 14. As is best shown in L136 !
1 Fig. 4 and Fig. 5, the engagement of syringe 14 with three-way 2 valve 10 causes extension 40 of syringe 14 to extend into 3 inlet 50 of fitment 34 in a manner that p~rmits probe arm 70 4 of check valve 64 to extend into extension 40 of syringe 14.
It is important that probe arm 70 be of sufficiently reduced 6 cross-sectional area, when compared with fluid conduit 42, to 7 permit fluid communication from syringe 14 through the fluid 8 conduit 42 even though probe arm 70 extends into fluid conduit 9 42.
11 Referring now to Fig. 3, it is seen that passageway 12 58 in sleeve 56 has associa~ed therewith the slots 62a, b, c 13 and d which extend radially from the passageway 58 to form 14 fluid pathways that are substantially perpendicular to the fluid passageway 58. For purposes which will become clearer 16 during the subse~uent discussion of the operation of three-way 17 valve 10, slots 62a, b, c and d effectively prevent the 18 establishment of a fluid seal between tip ~4 of extension 40 19 and sleeve 56.
24 In its operation, the three-way valve 10 is pri-marily intended for use in a system for administering IV fluids 26 to a patient. As seen in Fig. 1, such a system typically 27 includes an IV bottle 12 in fluid communication with a volu-28 metric pump tnot shown). More speciEically, bottle 12 is con-29 nected to an IV tube 20 which, in turn, is connected by any manner well known in the art to the three-way valve 10, and lZ01~)36 1 IV tube 22 is connected with outlet 52 of three-way valve 10 2 for the passage of fluid to an animate patient. A second 3 fluid source, such as syringe 14, is pre-filled with a medica-4 ment in a customary manner according to the particular needs of the patient. The engagement of syringe 14 with three-way 6 valve 10 is accomplished by the nurse or operator in a manner 7 as shown in Fig. 4 or Fig. 5. As seen in these figures, 8 extension 40 of syringe 14 is inserted into the inlet 50 of 9 three-way valve 10 and syringe 14 is then rotated to engage connector 46 with thread 36 of fitment 34. As is best seen in 11 Fig. 4, this connection between syringe 14 and three-way valve 12 10 causes the tip 44 of extension 40 to engage with sleeve 56 13 and unseat sleeve 56 from the base portion 26 o~ housing 28.
14 This connection further urges sleeve 56 into fluid sealing engagement with the end portion 24 of housing 28 to provide a 16 fluid tight seal between the sleeve 56 and end portion 24. As 17 can be appreciated from Fig. 4, this also breaks the fluid 18 seal over inlet 50 and instead provides a fluid tight seal 19 over the inlet 48 into three-way valve 10. In this configura-tion a fluid passageway is established through fluid chamber 21 54 from inlet 50 to outlet 52. As can be appreciated from 22 cross-reference between Fig. 3 and Fig. 4, as the tip 44 of 23 extension ~0 on syringe 14 contacts sleeve 56, a fluid passage-24 way is created from fluid conduit 42 through the respective slots 62a, b, c and d on sleeve 56. The passage of fluid from 26 conduit 42 into slots 62a, b, c and d then proceeds into fluid 27 chamber 54 of housing 28. Also it can be appreciated in Fig.
28 4 that the above described engagement between syringe 14 and 29 three-way valve 10 does not unseat ~he abutment 68 of check valve 64 from its fluid sealing engagement with shoulder 60 . g _ i2iD~336 1 since abutment 68 continues to be urged against shoulder 60 by 2 the spring 72 during the initial engagement of prefilled 3 syringe 14 with three-way valve 10.
While the syringe 14 is engaged with three-way valve 6 10, the evacuation of fluid from syringe 14 by the pump (not 7 shown) causes plunger 18 and its handle 16 to correspondingly 8 advance into the syringe 14. It can be seen in Fig. 5 that 9 when syringe 14 is emptied, plunger 18 urges against probe arm 70 to unseat check valve 64 from its fluid sealing engagement 11 with sleeve 56. Simultaneously, plunger 18 is urged into 12 fluid sealing engagement with extension 40 to prevent fluid 13 flow through fluid conduit 42. It is preferred that plunger 14 18 be of an elastomeric material such as is found in commonly available syringes 14 to provide for the fluid seal.
17 In accordance with the above described operation, it 18 can be appreciated tha~ three-way valve 10 accomplishes the 19 sequencing of fluid flow from bottle 12 and from syringe 14 in 20` a manner graphically described by sequential consideration of 21 Fig. 2, 4 and 5. In this sequence the three-way valve 10, 22 prior to its connection with syringe 14, provides for a fluid 23 path directly from bottle 12 through three-way valve 10 to a 24 pump (not shown) as shown by the directional arrows 74 in Fig.
2. Thus, a fluid path is defined within three-way valve 10 26 from inlet 48 into fluid c'namber 54 around the sleeve 56 and 27 out of three-way valve 10 via outlet 52. Once syringe 14 is 28 brought into operative engagement with the three-way valve 10, 29 extension 40 acts to move sleeve 56 into a position to create a fluid seal between sleeve 56 and inlet 48 while simulta-31 neously breaking the fluid seal between sleeve S6 and the ~Z4~1~)36 1 inlet 50. Thus, a fluid path is established through three-way 2 valve 10 as indicated by the airectional arrows 76 in Fig. 4.
3 More specifically, a fluid path is defined within three-way 4 valve 10 from that portion of the passageway 58 which surrounds probe arm 70 through the slots 62a, b, c and d into chamber 54 6 for further flow from three-way valve 10 via outlet 52.
8 Finally, upon completion of the drawing of fluid 9 from syringe 14, Fig. 5 shows that the plunger 18 contac-ts probe arm 70 to disengage check valve 64 from its fluid 11 sealing engagement with the sleeve 56. At the same time, 12 plunger 18 con~acts with extension 40 to provide a fluid 13 tight seal between the syringe 14 and inlet 50. Consequently, 14 a fluid path is estàblished through three-way valve 10 as indicated bX directional arrows 78 in Fig. 5 which extends 16 from inlet 48 into passageway ~8, around check valve 64, out 17 through the slots 62a, b, c and d, and into fluid chamber 54 18 for exit from the three-way valve 10 via outlet 52. It should 19 be appreciated that fluid flow will continue along this path from bottle 12 through three-way valve 10 and to the pump (not 21 shown) until the empty syringe 14 is disengaged from three-way 22 valve 10. Upon disengagement of syringe 14 from three-way 23 valve 10, the flow path rom bottle 12 through three-way valve 24 10 and to the pump tnot shown), as shown in Fig. 2, will be re-established.
27 While the particular three-way valve for sequencing 28 of fluid as herein shown and disclosed in detail is fully 29 capable of obtaining the objects and providing the advantages herein before stated, it is to be understood that it is merely iz~
1 illustrative of the presently preferred embodiment of the 2 invention and that no limitations are intended to the details 3 of construction or design herein shown other than as defined 4 in the apended claims.
The novel features of this invention as well, as the 11 invention itself, both as to its orgànization and operation 12 will be best understood from the accompanying drawings, taken 13 in conjunction with the accompanying description, in which 14 similar reference characters refer to similar parts, and in which:
Fig. 1 is a perspective view of the three-way valve 21 shown connected with two separate fluid sources, one of which 22 is a syringe;
24 Fig. 2 is a cross-sectional view of a portion of the three-way valve as seen on line 2-2 in Fig. 1 without the 26 syringe attached;
28 Fig. 3 is a cxoss-sectional view of a portion of the 29 three-way valve as seen on line 3-3 in Fig. 2;
36 ( 1 Fig. 4 is a cross-sectional view of a portion of the 2 three-way valve as seen on line 2-2 in Fig. 1 with the three-3 way valve engaged with a syringe during fluid flow from the 4 syringe; and 6 Fig. 5 is a cross-sectional view of a portion of the 7 three-way valve as seen on line 2-2 in Fig. 1 engaged with a 8 syringe after fluid flow from the syringe has been completed.
11 DESCRIPTION OF l~E PREFERRED EMBODIMENT
13 Referring initially to Fig. 1, a three-way valve 14 generally designated 10 is shown connected for fluid communi-cation with a standard IV bottle 12 by an IV tube 20. Also 16 shown connected for fluid comm~lnication with three-way valve 17 10 is a syringe 14. As shown in Fig. 1, IV bottle 12, syringe 18 14 and three-way valve 10 are connected in a manner so that 19 ` fluid from either bottle 12 or syringe 14 can be directed through three-way valve 10 and into IV tube 22 for flow to a 21 fluid volumetric pump ~not shown).
23 In Fig. 2 it is seen that three-way valve 10 includes 24 a housing 28 formed by joining an end portion 24 with a base portion 26 to establish a fluid chamber 54. It should be 26 appreciated that the joining of end portion 24 with base por-27 tion 26 may be accomplished by any means well known in the 28 art, such as by solvent bonding or ultrasonic bonding. Formed onto end portion 24 is a fitment 30 which defines a fluid inlet 48 into fluid chamber 54. Also, for reasons which will _ ~ _ ( ~201Q36 ( 1 subsequently become apparent, fitment 30 is adapted for fluid 2 fluid sealing engagement with IV tube 20.
4 Still referring to Fig. 2, it is seen that base por-tion 26 is formed with a fitment 32 which deines a fluid out-6 let 52 from fluid chamber 54. Fitment 32 is adapted for fluid 7 sealing engagement with IV tube 22. Base portion 26 is also 8 formed with a fitment 34 which defines a fluid inlet 50 into 9 fluid chamber 54. Formed onto the external periphery of fit-ment 34 is a two-point partial thread 36 that permits screw-11 able engagement of three-way valve 10 with syringe 14. It 12 should be understood that fitment 34 may be a standard luer 13 lock.
Slidably disposed in fluid rh~rher 54 is a hollow 16 tubular-shaped ~lexible sleeve 56 forming a fluid passageway 17 58 therethrough. In the preferred embodiment, sleeve 56 is 18 made from an elastomeric material suitable for fluid sealing 19 engagement with base portion 26 and end portion 24. .Within fluid passageway 58 is a shoulder portion 60. As can also be 21 appreciated with reference to Fig. 2, the sl~eve 56 is dimen-22 sioned so that its length is slightly less than the longitudi-23 nal dimensio,n of the fluid chamber 54 to permit slidable 24 reciprocation of the sleeve 56 within the fluid chamber 54.
26 As seen in Fig. 2, a check valve 64 is disposed 27 within the passageway 58 of sleeve 56. The check valve 64 is 28 formed with a stem portion 66 of slightly reduced cross-29 sectional area to define a lip 67. Also formea onto check valve 64 is an abutment 68 which is adapted for ~luid sealing ~Z~ )3ti 1 engagement with shoulder 60 of sleeve 56. As previously 2 discussed sleeve 56 is preferably made of an elastomeric 3 material. Thus, abutment 68 of sleeve 56 is capable of fluid 4 sealing engagement with valve 64. Also included in the struc-ture of check valve 64 is a probe arm 70 which is an integral 6 extension of the check valve 64 and is dimensioned to extend 7 through fluid passageway 58 of sleeve 56 into inlet 50 of fit-8 ment 34 as shown in Fig. 2.
A spring 72 cooperating between the end portion 24 11 of housing 28 and lip 67 of check valve 64 urges the abutment 12 portion 68 of check valve 64 into fluid sealing engagement 13 with the shoulder 60 of sleeve 56. As can also be appreciated 14 by reference to ~ig. 2, the urging of spring 72 against check valve 64 also urges sleeve 56 into a fluid sealiny engagement 16 with base portion 26 of housing 28. This engagement prevents 17 fluid from entering fluid chamber 54 through fluid inlet 50.
18 As can be further appreciated by reference to Fig. 2, this 19 engagement also causes probe arm 70 of check valve 64 to extend into inlet 50.
22 Referring now to Fig. 4, it is seen that syringe 14 23 includes an extension forming a fluid conduit 42. Also, 24 extension 40 is dimensioned to be received within the inlet 50 of fitment 34~ Fluid sealing engagement of the syr;nge 14 26 with three-way valve 10 is secured by a connector 46 that is 27 adapted to threadably engage with thread 36 located on the 28 extexnal periphery of fitment 34. As seen in Fig. 4, both 29 extension 40 and connector 46 of syringe 14 are integral extensions of the wall 38 of syringe 14. As is best shown in L136 !
1 Fig. 4 and Fig. 5, the engagement of syringe 14 with three-way 2 valve 10 causes extension 40 of syringe 14 to extend into 3 inlet 50 of fitment 34 in a manner that p~rmits probe arm 70 4 of check valve 64 to extend into extension 40 of syringe 14.
It is important that probe arm 70 be of sufficiently reduced 6 cross-sectional area, when compared with fluid conduit 42, to 7 permit fluid communication from syringe 14 through the fluid 8 conduit 42 even though probe arm 70 extends into fluid conduit 9 42.
11 Referring now to Fig. 3, it is seen that passageway 12 58 in sleeve 56 has associa~ed therewith the slots 62a, b, c 13 and d which extend radially from the passageway 58 to form 14 fluid pathways that are substantially perpendicular to the fluid passageway 58. For purposes which will become clearer 16 during the subse~uent discussion of the operation of three-way 17 valve 10, slots 62a, b, c and d effectively prevent the 18 establishment of a fluid seal between tip ~4 of extension 40 19 and sleeve 56.
24 In its operation, the three-way valve 10 is pri-marily intended for use in a system for administering IV fluids 26 to a patient. As seen in Fig. 1, such a system typically 27 includes an IV bottle 12 in fluid communication with a volu-28 metric pump tnot shown). More speciEically, bottle 12 is con-29 nected to an IV tube 20 which, in turn, is connected by any manner well known in the art to the three-way valve 10, and lZ01~)36 1 IV tube 22 is connected with outlet 52 of three-way valve 10 2 for the passage of fluid to an animate patient. A second 3 fluid source, such as syringe 14, is pre-filled with a medica-4 ment in a customary manner according to the particular needs of the patient. The engagement of syringe 14 with three-way 6 valve 10 is accomplished by the nurse or operator in a manner 7 as shown in Fig. 4 or Fig. 5. As seen in these figures, 8 extension 40 of syringe 14 is inserted into the inlet 50 of 9 three-way valve 10 and syringe 14 is then rotated to engage connector 46 with thread 36 of fitment 34. As is best seen in 11 Fig. 4, this connection between syringe 14 and three-way valve 12 10 causes the tip 44 of extension 40 to engage with sleeve 56 13 and unseat sleeve 56 from the base portion 26 o~ housing 28.
14 This connection further urges sleeve 56 into fluid sealing engagement with the end portion 24 of housing 28 to provide a 16 fluid tight seal between the sleeve 56 and end portion 24. As 17 can be appreciated from Fig. 4, this also breaks the fluid 18 seal over inlet 50 and instead provides a fluid tight seal 19 over the inlet 48 into three-way valve 10. In this configura-tion a fluid passageway is established through fluid chamber 21 54 from inlet 50 to outlet 52. As can be appreciated from 22 cross-reference between Fig. 3 and Fig. 4, as the tip 44 of 23 extension ~0 on syringe 14 contacts sleeve 56, a fluid passage-24 way is created from fluid conduit 42 through the respective slots 62a, b, c and d on sleeve 56. The passage of fluid from 26 conduit 42 into slots 62a, b, c and d then proceeds into fluid 27 chamber 54 of housing 28. Also it can be appreciated in Fig.
28 4 that the above described engagement between syringe 14 and 29 three-way valve 10 does not unseat ~he abutment 68 of check valve 64 from its fluid sealing engagement with shoulder 60 . g _ i2iD~336 1 since abutment 68 continues to be urged against shoulder 60 by 2 the spring 72 during the initial engagement of prefilled 3 syringe 14 with three-way valve 10.
While the syringe 14 is engaged with three-way valve 6 10, the evacuation of fluid from syringe 14 by the pump (not 7 shown) causes plunger 18 and its handle 16 to correspondingly 8 advance into the syringe 14. It can be seen in Fig. 5 that 9 when syringe 14 is emptied, plunger 18 urges against probe arm 70 to unseat check valve 64 from its fluid sealing engagement 11 with sleeve 56. Simultaneously, plunger 18 is urged into 12 fluid sealing engagement with extension 40 to prevent fluid 13 flow through fluid conduit 42. It is preferred that plunger 14 18 be of an elastomeric material such as is found in commonly available syringes 14 to provide for the fluid seal.
17 In accordance with the above described operation, it 18 can be appreciated tha~ three-way valve 10 accomplishes the 19 sequencing of fluid flow from bottle 12 and from syringe 14 in 20` a manner graphically described by sequential consideration of 21 Fig. 2, 4 and 5. In this sequence the three-way valve 10, 22 prior to its connection with syringe 14, provides for a fluid 23 path directly from bottle 12 through three-way valve 10 to a 24 pump (not shown) as shown by the directional arrows 74 in Fig.
2. Thus, a fluid path is defined within three-way valve 10 26 from inlet 48 into fluid c'namber 54 around the sleeve 56 and 27 out of three-way valve 10 via outlet 52. Once syringe 14 is 28 brought into operative engagement with the three-way valve 10, 29 extension 40 acts to move sleeve 56 into a position to create a fluid seal between sleeve 56 and inlet 48 while simulta-31 neously breaking the fluid seal between sleeve S6 and the ~Z4~1~)36 1 inlet 50. Thus, a fluid path is established through three-way 2 valve 10 as indicated by the airectional arrows 76 in Fig. 4.
3 More specifically, a fluid path is defined within three-way 4 valve 10 from that portion of the passageway 58 which surrounds probe arm 70 through the slots 62a, b, c and d into chamber 54 6 for further flow from three-way valve 10 via outlet 52.
8 Finally, upon completion of the drawing of fluid 9 from syringe 14, Fig. 5 shows that the plunger 18 contac-ts probe arm 70 to disengage check valve 64 from its fluid 11 sealing engagement with the sleeve 56. At the same time, 12 plunger 18 con~acts with extension 40 to provide a fluid 13 tight seal between the syringe 14 and inlet 50. Consequently, 14 a fluid path is estàblished through three-way valve 10 as indicated bX directional arrows 78 in Fig. 5 which extends 16 from inlet 48 into passageway ~8, around check valve 64, out 17 through the slots 62a, b, c and d, and into fluid chamber 54 18 for exit from the three-way valve 10 via outlet 52. It should 19 be appreciated that fluid flow will continue along this path from bottle 12 through three-way valve 10 and to the pump (not 21 shown) until the empty syringe 14 is disengaged from three-way 22 valve 10. Upon disengagement of syringe 14 from three-way 23 valve 10, the flow path rom bottle 12 through three-way valve 24 10 and to the pump tnot shown), as shown in Fig. 2, will be re-established.
27 While the particular three-way valve for sequencing 28 of fluid as herein shown and disclosed in detail is fully 29 capable of obtaining the objects and providing the advantages herein before stated, it is to be understood that it is merely iz~
1 illustrative of the presently preferred embodiment of the 2 invention and that no limitations are intended to the details 3 of construction or design herein shown other than as defined 4 in the apended claims.
Claims (21)
THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE PROPERTY OR
PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A device for sequencing pumped fluid flow from separate sources in an IV administration set comprising:
a housing formed with a fluid chamber and having a first inlet, a second inlet and an outlet;
a sleeve having a fluid passageway therethrough disposed in said fluid chamber for movement between a first position and a second position;
a check valve disposed in said passageway;
first means to urge said sleeve into the first posi-tion for fluid sealing engagement with said second inlet to define a fluid pathway in said chamber between said first inlet and said outlet;
second means to urge said sleeve from said first position into said second position for fluid sealing engage-mint with said first inlet to define a fluid pathway in said chamber between said second inlet and said outlet;
third means operative while said sleeve is in said second position to close said second inlet and open said check valve to define a fluid pathway through said passageway from said first inlet to said outlet.
a housing formed with a fluid chamber and having a first inlet, a second inlet and an outlet;
a sleeve having a fluid passageway therethrough disposed in said fluid chamber for movement between a first position and a second position;
a check valve disposed in said passageway;
first means to urge said sleeve into the first posi-tion for fluid sealing engagement with said second inlet to define a fluid pathway in said chamber between said first inlet and said outlet;
second means to urge said sleeve from said first position into said second position for fluid sealing engage-mint with said first inlet to define a fluid pathway in said chamber between said second inlet and said outlet;
third means operative while said sleeve is in said second position to close said second inlet and open said check valve to define a fluid pathway through said passageway from said first inlet to said outlet.
2. A device as recited in claim 1 wherein said check valve is slidably disposed in said passageway.
3. A device as recited in claim 2 wherein said passageway is formed with a shoulder and said check valve is formed with an abutment adapted for fluid sealing engagement with said shoulder.
4. A device as recited in claim 3 wherein said check valve is made of an elastomeric material.
5. A device as recited in claim 4 wherein said abutment of said check valve is urged into fluid sealing engagement with said shoulder of said sleeve by said first means.
6. A device as recited in claim 5 wherein said first means is a spring.
7. A device as recited in claim 6 further comprising a syringe having a plunger and a tip portion and an attachment means associated with said second inlet for connecting said syringe into fluid communication with said second inlet.
8. A device as recited in claim 7 wherein said second means is said tip portion.
9. A device as recited in claim 8 wherein said check valve further comprises an integral probe extending through said passageway and into said second inlet.
10. A device as recited in claim 9 wherein said third means is said plunger.
11. A device as recited in claim 10 wherein said plunger urges against said probe to disengage said abutment from said shoulder.
12. A device for sequencing pumped fluid flow comprising:
a housing formed with a fluid chamber having a first inlet, a second inlet and an outlet positioned for fluid com-munication with said first and second inlets;
a first fluid source engageable in fluid communica-tion with said first inlet;
a second fluid source engageable in fluid communica-tion with said second inlet;
a hollow sleeve slidably disposed in said fluid chamber for alternate fluid sealing engagement with said first and second inlets and having a fluid passageway in fluid com-municating alignment with said first inlet;
a shoulder formed in said passageway;
a check valve slidably disposed in said passageway and urged into fluid sealing engagement with said shoulder to prevent fluid flow through said passageway;
first means for urging said sleeve into fluid sealing engagement with said second inlet;
second means for urging said sleeve into fluid seal-ing engagement with said first inlet and positioning said passageway in fluid communication with said first inlet; and third means for sealing said second inlet and breaking the fluid seal between said check valve and said shoulder to permit fluid flow through said passageway between said first inlet and said outlet.
a housing formed with a fluid chamber having a first inlet, a second inlet and an outlet positioned for fluid com-munication with said first and second inlets;
a first fluid source engageable in fluid communica-tion with said first inlet;
a second fluid source engageable in fluid communica-tion with said second inlet;
a hollow sleeve slidably disposed in said fluid chamber for alternate fluid sealing engagement with said first and second inlets and having a fluid passageway in fluid com-municating alignment with said first inlet;
a shoulder formed in said passageway;
a check valve slidably disposed in said passageway and urged into fluid sealing engagement with said shoulder to prevent fluid flow through said passageway;
first means for urging said sleeve into fluid sealing engagement with said second inlet;
second means for urging said sleeve into fluid seal-ing engagement with said first inlet and positioning said passageway in fluid communication with said first inlet; and third means for sealing said second inlet and breaking the fluid seal between said check valve and said shoulder to permit fluid flow through said passageway between said first inlet and said outlet.
13. A device as recited in claim 12 wherein said check valve is made of an elastomeric material.
14. A device as recited in claim 13 further comprising a probe integrally attached to said check valve for extending through said passageway and into said second inlet.
15. A device as recited in claim 14 wherein said first means urges said check valve into fluid sealing engage-ment with said shoulder.
16. A device as recited in claim 15 wherein said first means is a spring.
17. A device as recited in claim 16 wherein said second fluid source is a syringe having a plunger and a tip portion.
18. A device as recited in claim 17 wherein said second means is said tip portion.
19. A device as recited in claim 18 wherein said third means is said plunger.
20. A device as recited in claim 19 wherein said plunger urges against said probe to open said check valve.
21. A method for sequencing pumped fluid flow from separate sources in an IV administration set comprising the steps of:
a. engaging a first fluid source into fluid com-munication with a first inlet of a device comprising: a housing formed with a fluid chamber and having a first inlet, a second inlet and an outlet; a sleeve having a fluid passage-way therethrough disposed in said fluid chamber for movement between a first position and a second position; a check valve disposed in said passageway; and first means to urge said sleeve into the first position for fluid sealing engagement with said second inlet to define a fluid pathway in said chamber between said first inlet and said outlet;
b. engaging a syringe with plunger into fluid com-munication with said second inlet to urge said sleeve from said first position into said second position for fluid sealing engagement with said first inlet to define a fluid pathway in said chamber between said second inlet and said outlet; and c. pumping fluid from said syringe until said plunger is in position to close said second inlet and open said check valve to define a fluid pathway through said passageway from said first inlet to said outlet.
a. engaging a first fluid source into fluid com-munication with a first inlet of a device comprising: a housing formed with a fluid chamber and having a first inlet, a second inlet and an outlet; a sleeve having a fluid passage-way therethrough disposed in said fluid chamber for movement between a first position and a second position; a check valve disposed in said passageway; and first means to urge said sleeve into the first position for fluid sealing engagement with said second inlet to define a fluid pathway in said chamber between said first inlet and said outlet;
b. engaging a syringe with plunger into fluid com-munication with said second inlet to urge said sleeve from said first position into said second position for fluid sealing engagement with said first inlet to define a fluid pathway in said chamber between said second inlet and said outlet; and c. pumping fluid from said syringe until said plunger is in position to close said second inlet and open said check valve to define a fluid pathway through said passageway from said first inlet to said outlet.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/594,135 US4506691A (en) | 1984-03-28 | 1984-03-28 | Three-way valve for automatic sequencing of fluid flow |
| US594,135 | 1990-10-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1201036A true CA1201036A (en) | 1986-02-25 |
Family
ID=24377670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000472433A Expired CA1201036A (en) | 1984-03-28 | 1985-01-18 | Three-way valve for automatic sequencing of fluid flow |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US4506691A (en) |
| EP (1) | EP0163373A1 (en) |
| CA (1) | CA1201036A (en) |
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|---|---|---|---|---|
| US5353837A (en) * | 1986-03-04 | 1994-10-11 | Deka Products Limited Partnership | Quick-disconnect valve |
| EP0240590B1 (en) * | 1986-04-11 | 1991-08-28 | B. Braun-SSC AG | Anti-backflow injection valve |
| SE453801B (en) * | 1986-08-06 | 1988-03-07 | Ingvar Andersson | CLUTCH FOR MEDICAL USE |
| US4997430A (en) * | 1989-09-06 | 1991-03-05 | Npbi Nederlands Produktielaboratorium Voor Bloedtransfusieapparatuur En Infusievloeistoffen B.V. | Method of and apparatus for administering medicament to a patient |
| US5020562A (en) * | 1989-11-28 | 1991-06-04 | Imed Corporation | Multiline check valve assembly |
| US5092840A (en) * | 1990-07-16 | 1992-03-03 | Healy Patrick M | Valved medicine container |
| DE4038547C1 (en) * | 1990-12-04 | 1991-12-19 | Klaus Dipl.-Ing. 8755 Alzenau De Mokros | |
| US5423791A (en) * | 1992-03-31 | 1995-06-13 | Bartlett; J. Mark | Valve device for medical fluid transfer |
| US5405333A (en) * | 1992-12-28 | 1995-04-11 | Richmond; Frank M. | Liquid medicament bag with needleless connector fitting using boat assembly |
| US5421814A (en) * | 1993-06-03 | 1995-06-06 | Innovations For Access, Inc. | Hemodialysis infusion port and access needle |
| US6206860B1 (en) | 1993-07-28 | 2001-03-27 | Frank M. Richmond | Spikeless connection and drip chamber with valve |
| US5785693A (en) * | 1993-11-26 | 1998-07-28 | Haining; Michael L. | Medical connector |
| US5533983A (en) * | 1993-11-26 | 1996-07-09 | Haining; Michael L. | Valved medical connector |
| US5401245A (en) * | 1993-11-26 | 1995-03-28 | Haining; Michael L. | Medical connector with valve |
| US5395350A (en) * | 1994-02-14 | 1995-03-07 | Summers; Daniel A. | Paracentesis valve |
| AU1845295A (en) * | 1994-02-14 | 1995-08-29 | Howard Levy | Valve apparatus |
| US5618268A (en) * | 1995-06-06 | 1997-04-08 | B. Braun Medical Inc. | Medical infusion devices and medicine delivery systems employing the same |
| US5623969A (en) * | 1995-06-07 | 1997-04-29 | B. Braun Medical Inc. | Normally closed aspiration valve |
| US5810768A (en) * | 1995-06-07 | 1998-09-22 | Icu Medical, Inc. | Medical connector |
| US6090083A (en) | 1996-01-31 | 2000-07-18 | Scimed Life Systems, Inc. | Low profile valve and balloon catheter |
| US6050972A (en) | 1996-05-20 | 2000-04-18 | Percusurge, Inc. | Guidewire inflation system |
| WO1997044085A2 (en) | 1996-05-20 | 1997-11-27 | Percusurge, Inc. | Low profile catheter valve |
| US6786888B1 (en) | 1996-05-20 | 2004-09-07 | Medtronic Ave, Inc. | Low profile catheter for emboli protection |
| US6106502A (en) * | 1996-12-18 | 2000-08-22 | Richmond; Frank M. | IV sets with needleless fittings and valves |
| US20020156431A1 (en) * | 1998-09-17 | 2002-10-24 | Feith Raymond P. | Multi-valve injection/aspiration manifold with needleless access connection |
| IL127900A (en) * | 1999-01-01 | 2001-12-23 | Elcam Plastic Kibbutz Bar Am | Blood sampling/injecting valve |
| US6475185B1 (en) | 2000-02-24 | 2002-11-05 | Scimed Life Systems, Inc. | Occlusion device |
| JP4791692B2 (en) * | 2001-12-07 | 2011-10-12 | アシスト メディカル システムズ，インク． | Low pressure measuring device in high pressure environment |
| US7285110B2 (en) * | 2003-06-10 | 2007-10-23 | P. Rowan Smith, Jr. | Retractable hypodermic safety syringe |
| US9232948B2 (en) * | 2003-12-23 | 2016-01-12 | Stryker Corporation | Catheter with distal occlusion apparatus |
| US8075533B2 (en) * | 2005-05-02 | 2011-12-13 | Preventiv, Inc. | Autoflush syringe |
| US8529517B2 (en) * | 2005-05-02 | 2013-09-10 | Shi Zi Technology, Ltd. | Autoflush syringe |
| US8936577B2 (en) | 2005-05-02 | 2015-01-20 | Shi Zi Technology, Ltd. | Methods and devices for autoflush syringes |
| CA2630967C (en) * | 2005-10-20 | 2014-08-05 | Frank M. Richmond | Connector/device with reflux valves |
| US7867204B2 (en) * | 2006-05-04 | 2011-01-11 | B. Braun Medical Inc. | Needleless access port valves |
| US8919692B2 (en) | 2009-04-28 | 2014-12-30 | Sikorsky Aircraft Corporation | Proximity sensor valve and lock system using same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2312686A (en) * | 1941-09-24 | 1943-03-02 | John Eley Jr | Emergency cut-over valve |
| US2854027A (en) * | 1956-12-20 | 1958-09-30 | Albert W Kaiser | Disposable-type three-way valve construction |
| US3057350A (en) * | 1958-06-27 | 1962-10-09 | Baxter Don Inc | Administration set |
| US3057370A (en) * | 1959-09-28 | 1962-10-09 | Baxter Don Inc | Three-way valve |
| US3280834A (en) * | 1964-02-05 | 1966-10-25 | Crawford Fitting Co | Slide valve |
| US3352531A (en) * | 1964-04-02 | 1967-11-14 | Scovill Manufacturing Co | Check valve |
| US3385301A (en) * | 1965-10-11 | 1968-05-28 | American Hospital Supply Corp | Balloon catheter having a deformable one-way inflation valve |
| US3353724A (en) * | 1965-10-22 | 1967-11-21 | Mack S Johnston | Beer tapping device |
| US3572375A (en) * | 1967-06-02 | 1971-03-23 | David Rosenberg | Twin valve t-connector |
| GB1192986A (en) * | 1967-08-31 | 1970-05-28 | Eschmann Bros & Walsh Ltd | Intravenous Valve Assembly |
| US3799171A (en) * | 1972-09-07 | 1974-03-26 | Kendall & Co | Inflation valve for catheter retention balloon |
| US4084606A (en) * | 1974-04-23 | 1978-04-18 | Baxter Travenol Laboratories, Inc. | Fluid transfer device |
| US3985133A (en) * | 1974-05-28 | 1976-10-12 | Imed Corporation | IV pump |
| US3965910A (en) * | 1975-04-28 | 1976-06-29 | Walpak Company | Urinary irrigation valve |
| US4159102A (en) * | 1977-09-28 | 1979-06-26 | Draft Systems, Inc. | Locking mechanism for coupler and valve assembly |
-
1984
- 1984-03-28 US US06/594,135 patent/US4506691A/en not_active Expired - Fee Related
-
1985
- 1985-01-18 CA CA000472433A patent/CA1201036A/en not_active Expired
- 1985-03-13 EP EP85301717A patent/EP0163373A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| US4506691A (en) | 1985-03-26 |
| EP0163373A1 (en) | 1985-12-04 |
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Legal Events
| Date | Code | Title | Description |
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| MKEX | Expiry |