US2511269A - Tourniquet - Google Patents

Description

Nj v. JoNEs June 13, 1950 TOURNIQUET -Filed May 23, 1949 INVENTOR.

Patented `lune 13, 1950 UNITED STATES PATENT OFFICE TOURNIQUET Norris V. Jones, San Francisco, Calif.

Application May 23, 1949, Serial No. 94,830

2 Claims. (Cl. 12S- 327) This invention relates to surgical appliances and moreparticularly to a tourniquet.

In the application of a tourniquet on a limb so as to effect the extending of veins for application of serum or other medicine into the veins, the tourniquets at present available and in use are so constructed that when pressure has been released, the release of pressure is eifected quickly so that a needle which is projecting into a vein frequently jumps out, thereby requiring the re-application oi the pressure by the tourniquet. It is an object of this invention to provide a tourniquet embodying an inflatable band adapted to be applied to an arm or limb, which is so constructed that pressure may vbe gradually released, thereby eliminating the possibility of the muscular reaction due to sudden release of pressure and also eliminate the possibility of the needle being forced out under muscular reaction.

Another object of this invention is to provide a tourniquet of this kind, including an improved means for holding the band on the arm r limb.

A further object of this invention is to provide a tcurniquet of this kind, including an iniiatable band formed of a pair of face abutting resilient strips which are secured together at their outer edges for a major portion of the length thereof, so as to thereby provide a relatively long inflatable tube designed to apply equal pressure completely about a limb or arm.

With the above and other objects in view, my invention consists in the arrangement, combination and details of construction disclosed in the drawing and specification, and then more particularly pointed out in the appended claims.

In the drawing,

Figure 1 is a plan View of a tourniquet constructed according to an embodiment of this invention,

Figure 2 is a longitudinal section taken on the line 2--2 of Figure 1,

Figure 3 is a sectional View taken on the line 3-3 of Figure 1,

Figure 4 is a sectional view taken on the line 4-4 of Figure 1,

Figure 5 is a sectional View taken on the line 5-5 of Figure 1.

Referring to the drawing, the numeral Il! designates generally an inatable band which is formed of a pair of face abutting resilient or rubber strips II and I2. The strips II and I2 are secured together along their longitudinal edges, as indicated at I3, and are secured together at one end, as indicated at I4. The strips II and I2 are also secured together at a point inwardly from an end thereof, as indicated at I5, and the remainder of the strips II and I2 are secured together, as indicated at I6.

The two strips II and I2 at the point where they are secured together in face abutting relation, as indicated at I6, are formed into an elongated tapering tongue I'I. A loop or narrow strap I8 is secured to the band I0 at a point between the ends thereof and within the inflatable area, being extended about the lengthwise edges of the strips II and I2, as shown in Figure 5, and then secured to the lower strip I2, as indicated at I9. By extending the strap I9 about the lengthwise edges of the band IIB when the tongue I'I is threaded through the strap It, any strain applied to the strap IB will not be applied vdirectly to the securing means I9.

The securing means for holding the strips II and I2 together and the strap I8 onto the band I0 may be cementitious materiali or may be electronic sealing and securing means. It will, of course, be understood that the band I0 may be formed of any suitable flexible material, either rubber, plastic or air impervious fabric.

In order to provide a means whereby the band I0 may be inflated and deflated, I have provided a tube 20 which communicates with the space between the two strips II and I2. The tube 2li extends at right angles to the length of the band I U and has connected therewith an inflating bulb 2l. The bulb 2| includes a pair of springpressed check valves 22 and 23 so that air may readily be pumped into the band I0.

In order to provide a means whereby the band I may be either gradually or quickly deflated, I have provided a spring-pressed deflating valve 24 which includes a housing 25 and a valve plug 26 carried by an elongated stem 2l. A spring 28 constantly urges the plug 26 outward to engage the valve seat 29 which is formed on the inner end of the housing 25. A knob or button 3i) is fixed to the outer end of the stem 21 and is adapted to be pressed inwardly to provide for movement of the valve plug 26 to open position.

In the use and operation of this device, the band I0 is wrapped about the arm with the tongue I'I threaded through the strap I8, and the tongue I'I may then be extended underneath the band I 0 after passing through the strap I8. The bulb 2| is then operated to inflate the band I Il in order to provide the desired pressure on the arm. After the operation has been performed on the arm, such as extending a needle into a vein, the band I may be gradually deflated by pressure on the release button 30. In practice the band IU is preferably gradually released so as to eliminate any shock to the nerves or muscles and thereby prevent a, muscular reaction tending to force the needle from the arm.

I do not mean to coniine myself to the exact details of construction herein disclosed, but claim all variations falling Within the purview of the appended claims.

What I claim is:

1. A tourniquet comprising an elongated in'' ilatable member formed of a pair of at strips secured together along the edges thereof, a tubeV communicating at one end withthe space` between said strips, a, resilient bulb connected to the other end of said tube andcommunicatingl therewith, a spring-pressed check valve between said bulb and said tube constantly urged to seated position towards said bulb, :an air inlet opening to said4 bulb; a spring-pressed check valve 'constantly urged to seated position towards theatmosphere, and a deilating` valve in said tube in'- cluding a valve housing'extending'at right angles to said tube-and formed with a Valve seat onthe inner end thereof, a valvestem loosely slidable in said housingA and having one end extending outwardly thereof, a valve member on the other end of saidlstem engageable with said seat, an operating knob ori-saidV one end'of saidstem; and a coiled spring in said housingr constantly urging said stem outwardly-forseating saidvalve memberwhereby said operatingiknob mayfbe'd'epressed for unseating said valve member and gradually releasing the airin said inatable member.

2. A tourniquet comprising an elongated meme ber formed of aV pair of flat strips secured together along a substantialportion;ofthe'iopposite side edges thereof to provide an inflatable portion, the remainder of said strips being cementitiously secured together throughout the widths thereof to provide securing strap portions, a tube communicating at one end with said inatable portion, an inflating bulb carried by the other end of said tube, a, deilating valve housing communicating with said tube intermediate the length of the latter,y a valve seat formed on the inner endl of said housing, a valve stem loosely sliding in said housing, a valve member on the inner end of said stem engageable with said seat for sealing said tube, the outer end of said stem extending beyond the outer end of said housing and having an operating knob secured thereto, a coiled spring in said housing constantly urging saidrvalve stem and member outwardly to seated position whereby said operating knob may be depressed for unseating said valve member to thereby gradually release air from said inflatable portion, and a transversely disposed loop forming member secured at its opposite ends to the side edges of said inatable portion and adapted to receive said securing strap portion when said inflatable portion is engaged about the arm of a patient.

NORRIS V. JONES.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,408,919 Wilson Mar. 7, 1922 1,644,824 Fedde Oct. 11, 1927 1,827,241 Kempf Oct. 13, 1931

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