US20080263870A2 - Metal demolition shears with indexable, integrated wear plate/piercing tip - Google Patents
Metal demolition shears with indexable, integrated wear plate/piercing tip Download PDFInfo
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- US20080263870A2 US20080263870A2 US10/697,554 US69755403A US2008263870A2 US 20080263870 A2 US20080263870 A2 US 20080263870A2 US 69755403 A US69755403 A US 69755403A US 2008263870 A2 US2008263870 A2 US 2008263870A2
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- Prior art keywords
- insert
- wear plate
- piercing
- piercing tip
- jaw
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/96—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
- E02F3/965—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements of metal-cutting or concrete-crushing implements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D31/00—Shearing machines or shearing devices covered by none or more than one of the groups B23D15/00 - B23D29/00; Combinations of shearing machines
- B23D31/008—Cutting-up scrap
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/08—Wrecking of buildings
- E04G23/082—Wrecking of buildings using shears, breakers, jaws and the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D35/00—Tools for shearing machines or shearing devices; Holders or chucks for shearing tools
- B23D35/002—Means for mounting the cutting members
-
- 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
- Y10T83/00—Cutting
- Y10T83/869—Means to drive or to guide tool
- Y10T83/8878—Guide
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- 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
- Y10T83/00—Cutting
- Y10T83/929—Tool or tool with support
- Y10T83/9411—Cutting couple type
-
- 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
- Y10T83/00—Cutting
- Y10T83/929—Tool or tool with support
- Y10T83/9411—Cutting couple type
- Y10T83/9447—Shear type
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Chemical & Material Sciences (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- Crushing And Grinding (AREA)
- Scissors And Nippers (AREA)
- Working Measures On Existing Buildindgs (AREA)
- Shearing Machines (AREA)
Abstract
Description
- The invention relates to metal demolition shears. More particularly, the invention relates to the cutting/piercing elements thereof.
- A conventional configuration for a
metal demolition shears 900 as known in the prior art is illustrated inFIGS. 1 and 2 . Theshears 900 are configured to be attached to the boom structure of, for example, excavating or earth-moving excavation equipment such as that made by Caterpillar, Komatsu, Hitachi, Kobelco, etc. Theshears 900 include a lower, fixed orstationary jaw 902 and an upper,movable jaw 904. The upper,movable jaw 904 is pivotally mounted by means ofpivot structure 906, which includes, for example, a main shaft, tie rod, rotation bearings and thrust bearing, end caps, and fasteners so as to pivot relative to the lower fixed orstationary jaw 902, as illustrated by double-headed arrow 908. Pistonmember 910 articulates (drives) the upper,movable jaw 904 for such pivoting movement. Thestationary jaw 902 is mounted into astick weldment structure 912 that supports thepiston member 910 and the pivotingupper jaw 904, and thestick weldment structure 912 is mated to the boom of the machinery by means of a fixed mounting bracket 913 (FIG. 1 ) or a rotational mounting adapter 914 (shown inFIG. 2 ) and rotational drive system (not shown inFIG. 1 ). - The lower, fixed
jaw 902 includes afixed blade member 916 and aguide member 920. Theguide blade member 920 is laterally spaced from thefixed blade member 916 and extends generally parallel to thefixed blade member 916. Across-member 922 extends between and is connected to the endmost portions of thefixed blade member 916 and theguide member 920. Together, thefixed blade member 916,guide member 920, andcross-member 922 define aslot 924 into which the upper,movable jaw 904 moves during operation of theshears 900. - The
shears 900 includes a number of hardened metal inserts that provide various cutting, piercing, or load-supporting edges and surfaces. In particular, the lower, fixedjaw 902 has a pair of hardened steel blade insertmembers 926, and the upper,movable jaw 904 has a pair of hardenedsteel insert members 928. The blade insertmembers upper jaws shears 900 is operated and the upper,movable jaw 904 is pivoted closed relative to the lower, fixedjaw 902, the blade insertmembers 928 in the upper,movable jaw 904 move past the blade insertmembers 926 in the lower, fixedjaw 902, and thecutting edges members cutting edges - As the upper,
movable jaw 904 pivots downward to shear a workpiece between the steel blade insertmembers movable jaw 904 laterally away from thefixed blade member 916 of the lower, fixedjaw 902. Theguide member 920 limits or constrains such lateral deflection of the upper,movable jaw 904. As a result, as themovable jaw 904 pivots downward into theslot 924, thelateral surface 934 of thenose portion 936 of themovable jaw 904 bears against inner-facingsurface 938 of theguide member 920. Therefore, a hardenedsteel wear plate 940 is customarily secured to thelateral surface 934 of thenose portion 936, and a hardenedsteel wear insert 942 is secured to the inner-facingsurface 938 of theguide member 920. - In addition to the blade insert
members plate 940, and wearinsert 942, ashears 900 conventionally has a hardenedsteel piercing tip 944 that is secured, e.g., by welding to a lower surface of thenose portion 936 at a forwardmost portion thereof. A hardened steelcross blade insert 946 is secured within a correspondingly shaped recess in thecross member 922 and cooperates with and/or provides a cutting surface against which thepiercing tip 944 engages when theshears 900 is being used to pierce holes through larger, generally flattened pieces of scrap metal. - Customarily, the various cutting, supporting, piercing, and/or wear elements described above (the blade insert
members wear plate 940, thewear insert 942, thepiercing tip 944, and the cross blade insert 946) are provided as individual, separate components. - The present invention features an indexable wear plate/piercing tip insert that is configured to be removably and repositionably attached to the front, nose portion of the upper, movable jaw of a metal demolition shears. The insert functions as both a wear plate and a piercing tip and is indexable in that a non-worn or less worn portion of the wear surface of the wear plate portion of the insert and non-worn shearing and piercing edges of the piercing tip portion of the insert can be presented simultaneously simply by rotating the insert 1800 and reattaching it to the nose portion of the upper, movable jaw of a metal demolition shears. This configuration simplifies maintenance of the shears and reduces the number of different parts that need to be kept in inventory, thus reducing operational costs. Additionally, because the wear plate/piercing tip insert is configured to be removable and repositionable, it is not welded onto the upper jaw or weldment. Therefore, an additional welding step is eliminated as a result of the bolt-on configuration of the wear plate/piercing tip of the invention.
- Thus, according to a first aspect, the invention features an indexable wear plate/piercing tip insert that is configured to be attached at a front, nose portion of a correspondingly configured movable jaw of a metal demolition shears. The wear plate/piercing tip insert has a body portion, a surface of which provides a wear surface, and at least a pair of laterally extending or protruding tip portions that provide multiple piercing tips for the movable jaw. The geometric configuration of the wear plate/piercing tip insert is essentially the same in a first position and a second position, the second position being a position in which the wear plate/piercing tip insert is rotated about a pivot axis passing centrally through the wear plate/piercing tip insert. As a result, a non-worn or less worn portion of the wear surface of the insert and non-worn or less worn shearing and piercing edges of the insert can be presented simultaneously for the metal demolition shear by rotating the wear plate/piercing tip insert about its pivot axis, from the first position to the second position, and reseating the wear plate/piercing tip insert on the movable jaw.
- According to one embodiment of the wear plate/piercing tip insert, the second position is a position in which the wear plate/piercing tip insert is rotated by 180° about its pivot axis. Additionally, the wear plate/piercing tip insert may have shearing edges on each tip portion that are coplanar with and that form an edge of the wear surface. The wear plate/piercing tip may also have at least one support boss that is located between the metal tip portions and that extends laterally from a central region of the wear plate/piercing tip to provide bearing support to help prevent the wear plate/piercing tip insert from being sheared off of the movable jaw during cutting and retracting operation of the shears on which the wear plate/piercing insert is mounted.
- According to a second aspect, the invention features a metal demolition shears having an indexable wear plate/piercing tip insert, generally as per the first aspect of the invention. The shears has a fixed jaw and a movable jaw, with the indexable wear plate/piercing tip insert being seated on the movable jaw at a forward, nose portion of the movable jaw.
- According to an embodiment of the invention, the shears has a fixed jaw including a fixed blade member with a first cutting/shearing edge extending along it and a guide member spaced from and extending in generally parallel relation to the fixed blade member. The shears also has a movable jaw that pivots relative to the fixed jaw, with a second cutting/shearing edge extending along the movable jaw. An indexable wear plate/piercing tip insert is attached at a front, nose portion of the movable jaw.
- The front, nose portion of the movable jaw has a pocket or cavity into which the tip portions of the wear plate/piercing tip insert each fit, with one of the tip portions being fitted in the pocket or cavity when positioned in a non-operative position. The pocket or cavity has contours that match surface contours of the tip portions. Additionally, the front, nose portion of the movable jaw has a notch formed in an underside thereof, with the notch having surface contours that match surface contours of each of the tip portions. The tip portion that is positioned in an operative position engages with the notch.
- The second cutting/shearing edge may be provided by at least one blade insert member, with the blade insert member extending all the way to a forwardmost portion of the front, nose portion of the movable jaw. An inner-facing surface of one of the tip portions that is in an operative position may engage with an inner-facing surface of the blade insert, such that a forward portion of the blade insert and a forward, lower portion of the tip portion in the operative position together define a piercing tip portion of the movable jaw.
- According to a third aspect, the invention features a jaw member for use in a metal demolition shears (for example, but not necessarily, the upper, movable jaw member). The jaw member has an indexable wear plate/piercing tip insert, generally as per the first aspect of the invention.
- According to a fourth aspect, the invention features a jaw member for use in a metal demolition shears (for example, but not necessarily, the upper, movable jaw member). The jaw member is configured to receive an indexable wear plate/piercing tip insert, generally as per the first aspect of the invention.
- These and other aspects and features of the invention will be described in greater detail below in connection with the drawings, in which:
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FIGS. 1 and 2 are perspective views, from different angles, of a metal demolition shears according to the prior art; -
FIGS. 3 and 4 are perspective views, from different angles, showing a metal demolition shears according to the invention; -
FIG. 5 is an exploded, perspective view showing the upper, movable jaw of a metal demolition shears according to the invention, as illustrated inFIGS. 3 and 4 ; -
FIG. 6 is a perspective view showing a portion of the upper, movable jaw illustrated inFIGS. 3-5 ; -
FIG. 7 is a perspective view illustrating an indexable wear plate/piercing tip according to the invention; -
FIGS. 8 a and 8 b and perspective views from opposite sides of an alternate embodiment of an indexable wear plate/piercing tip according to the invention; -
FIG. 9 is a perspective view showing another alternate embodiment of an indexable wear plate/piercing tip according to the invention; -
FIG. 10 is an exploded, perspective view showing an alternate embodiment of the upper, movable jaw of a metal demolition shears according to the invention, employing the indexable wear plate/piercing tip illustrated inFIG. 9 ; -
FIGS. 11 and 12 are perspective views from opposite sides showing the upper, movable jaw of a metal demolition shears illustrated inFIG. 10 , as assembled; and -
FIG. 13 is an exploded, perspective view showing another alternate embodiment of the upper, movable jaw of a metal demolition shears according to the invention. - A shears 100 according to the invention is illustrated in
FIGS. 3 and 4 , with an indexable wear plate/piercingtip insert 150 according to the invention being illustrated in greater detail inFIGS. 5-7 . Like the prior art shears 900 illustrated inFIGS. 1 and 2 , theshears 100 includes a lower, fixedjaw 102 and an upper,movable jaw 104 that is mounted bypivot structure 106 so as to be able to pivot relative to the lower, fixedjaw 102. Apiston member 110 is pivotally attached to apiston connection point 111 and extends and retracts to drive the upper,movable jaw 104 to open and close theshears 100. The lower andupper jaws pivot structure 106, andpiston member 110 are all mounted within or supported by astick weldment structure 112, which is mounted by means of a rotational fitting or adapter (not shown) to the boom or dipstick structure of an excavator or other heavy-duty equipment. - The lower, fixed
jaw 102 includes a fixedblade member 116 and aguide member 120 that is laterally spaced from and extends generally parallel to the fixedblade member 116. Across member 122 is attached (e.g., welded) to the endmost portions of theblade member 116 and guidemember 120, with a hardened steelcross member insert 146 secured within a correspondingly shaped recess on the inner-facing side of thecross member 122. Together, the fixedblade member 116,guide member 120, andcross member 122 form or define aslot 124 into which the upper,movable jaw 104 moves as it pivots to close theshears 100 during shearing operation of theshears 100. - A pair of indexable hardened steel
blade insert members 126 are removably attached (e.g., by bolts) to the fixedblade member 116, and a pair of indexable hardened steelblade insert members 128 are removably attached (e.g., by bolts) to the upper,movable jaw 104. Theblade insert members edges shears 100 according to the invention is generally the same as that of theshears 900 explained above as representative of the prior art. - As further illustrated in
FIGS. 3 and 4 , and as illustrated in greater detail inFIGS. 5-7 , an integral, indexable, wear plate/piercingtip insert 150 is removably secured to the forward,nose portion 136 of the upper,movable jaw 104 by means, for example, of cap screws or plowbolts 152. The wear plate/piercingtip insert 150 is preferably made from hardened, wear-resistant tool steel and has acentral region 154 and ends 156. Atip portion 158 protrudes laterally from eachend 156 of the wear plate/piercingtip insert 150, with thetip portions 158 both protruding toward the same side 160 of the wear plate/piercingtip insert 150. Theopposite side 162 of the wear plate/piercingtip insert 150, on the other hand, has a generallyplanar surface 164. As described in greater detail below, theplanar surface 164 provides a wear surface for the wear plate/piercingtip insert 150. - In addition to the
tip portions 158, a central, circular boss 166 (or similar dowel-type insert) also extends laterally from the central region of the wear plate/piercingtip insert 150, toward the side 160 of the wear plate/piercingtip insert 150. The boss 166 (or dowel) seats in a corresponding bore or depression 182 (described further below) in the movable,upper jaw 104 to provide support and bearing resistance against the forces to which the wear plate/piercingtip 150 is subjected during both cutting and retraction movement of the upper,movable jaw 104, as well as to transfer those loads to the main, structural body of theupper jaw 104. Depending on the size of the loads to which the wear plate/piercing tip will be subjected, it may be desirable to provide two or moresuch bosses 166′ on a wear plate/piercingtip insert 150′, as illustrated inFIGS. 8 a and 8 b. - The wear plate/piercing
tip insert 150 is “pivotally symmetric.” In other words, the geometric configuration of the wear plate/piercingtip insert 150 is essentially the same when the wear plate/piercingtip insert 150 is rotated by 180° aroundpivot axis 168.Pivot axis 168 passes centrally through the wear plate/piercingtip insert 150, e.g., through the center of thecircular boss 166 when just one is provided or with the bosses arranged symmetrically with respect to thepivot axis 168 when multiple bosses are provided, and pivotaxis 168 extends normal to theplanar surface 164. In particular, the profile of the wear plate/piercingtip insert 150 as seen looking along thepivot axis 168 in the direction of the arrow inFIG. 7 , including the contours of and the extent to which thetip portions 158 protrude toward the side 160, will be essentially the same when the wear plate/piercingtip insert 150 is rotated by 180° about thepivot axis 168. By “essentially the same,” it is meant that deviations such as small bumps, ridges, cavities, differences in thickness, etc., that may be present but that do not prevent the wear plate/piercingtip insert 150 from being secured to thenose portion 136 in multiple orientations are deemed not to destroy the “pivotal symmetry” of the wear plate/piercingtip insert 150. - Like the boss 166 (or bosses or dowel(s)), the
tip portions 158 provide bearing support for the wear plate/piercingtip insert 150 during cutting and retraction operation of themovable jaw 104. Therefore, the contours of thetip portions 158 are preferably configured to optimize load transfer into the structural sections of the upper,movable jaw 104. - As illustrated in
FIG. 5 , thenose portion 136 of the upper,movable jaw 104 has asurface 170 that is located on the side of themovable jaw 104 opposite to the side on which theblade insert members 128 are mounted, and thatsurface 170 is recessed slightly relative to surface 172 of the upper,movable jaw 104. Thesurface 170 is recessed by an amount that is the same as the thickness tC (FIG. 7 ) of thecentral region 154 of the wear plate/piercingtip insert 150. - The
nose portion 136 also has a pocket orcavity 174 formed near anupper edge 176 thereof. The pocket orcavity 174 extends laterally, from thesurface 170 toward the opposite side of the upper,movable jaw 104 to which theblade insert members 128 are attached, by an amount that is equal to the thickness tW (FIG. 7 ) of thetip portions 158 of the wear plate/piercing tip insert 150 (the thickness tW being equal to the thickness tC of the central region of the wear plate/piercingtip insert 150 and the amount by which thetip portions 158 protrude laterally relative to the central region 154). The contours of the pocket orcavity 174 match the contours of thesurfaces 175 of the laterally extendingtip portions 158. - In addition to the pocket or
cavity 174, a cut-out or notch 178 is formed in anunderside 180 of thenose portion 136 of the upper,movable jaw 104. The cut-out or notch 178 may extend laterally across the entire width of thenose portion 136. As is the case for the pocket orcavity 174, the contours of the cut-out or notch 178 match the contours of thesurfaces 175 of thetip portions 158 of the wear plate/piercingtip insert 150, although only to the extent thesurfaces 175 of thetip portions 158 will engage the surfaces of thenotch 178 when the wear plate/piercingtip insert 150 is mounted to thenose portion 136 of themovable jaw member 104. In other words, the contours of thenotch 178 will be the same as just a portion of the contours of the pocket orcavity 174. - A circular depression or bore 182 extends laterally from the
surface 170 toward the opposite side of thenose portions 136, to which theblade insert members 128 are attached. The contours of thecircular depression 182 match the contours of the central,circular boss 166, and thecircular depression 182 extends laterally by an amount that is equal to the height of the central,circular boss 166, i.e., by an amount that is the same as the distance to which the central,circular boss 166 protrudes relative to thecentral region 154 of the wear plate/piercingtip insert 150. With this configuration, the wear plate/piercingtip insert 150 can be seated securely onto thenose portion 136, with thesurface 155 of thecentral region 154 seating firmly againstseating surface 170, one of thetip portions 158 fitting firmly and closely within pocket orcavity 174, a portion of thesurface 175 of theother tip portion 158 engaging and mating with the surface of cut-out or notch 178, and the central,circular boss 166 extending into and mating with thecircular depression 182. Of course, if multiple bosses (or dowels) are provided, a corresponding number of depressions or bores 182 will also be provided, in a corresponding configuration or arrangement. - The
tip portions 158 of the wear plate/piercingtip insert 150 each have a pair of side surfaces 184 and 186 that are exposed when a giventip portion 158 is in the lower, operative position. The front-facingside surface 184 of thetip portion 158 that is in the lower, operative position is identified inFIG. 6 , and the bottom-facing side surface 186 (bottom-facing when the tip portion is in the operative position) is identified inFIG. 6 for thetip portion 158 that is in the upper, non-operative position. The front-facing side surfaces and bottom-facing side surfaces intersect each other along piercingedges 188. Additionally, the bottom-facing side surfaces 186 intersect theplanar surface 164 along shearing edges 190. - In the illustrated embodiment of a
shears 100 according to the invention, one of the hardened steelblade insert members 128 extends forwardly all the way to the front of thenose portion 136, as illustrated inFIG. 6 . In that case, the forward-facing side surfaces 184 are preferably configured to be co-planar with the forward-facing end surfaces 129 of theblade insert members 128 when both the wear plate/piercingtip insert 150 andblade insert members 128 are installed in their respective operative positions on the upper,movable jaw 104. Furthermore, the piercingedges 188 are preferably co-linear with the bottom-facing piercingedge 131 of the forwardmostblade insert member 128 when the wear plate/piercingtip insert 150 andblade insert members 128 are installed in their operative positions on thenose portion 136 of the upper,movable jaw 104. - Similarly, the bottom-facing side surfaces 186 are preferably configured such that the bottom-facing
side surface 186 of thetip portion 158 that is in the lower, operative position is co-planar with a bottom-facing side surface (not visible or labeled) of the forwardmostblade insert member 128. Thus, in this configuration, thetip portion 158 that is in the lower, operative position and the forward portion of the forwardmostblade insert member 128 work together or are combined to form the effective piercing tip region PT, as identified inFIGS. 3 and 4 . - Alternatively, as illustrated in
FIGS. 9-12 , if theblade insert member 128″ does not extend all the way forward to the forwardmost extent of thenose portion 136″ of themovable jaw 104″, it is preferable for thetip portions 158″ of the wear plate/piercing tip inserts 150″ to extend laterally, i.e, to have thicknesses tW, sufficient to extend all the way across the width of thenose portion 136″ of the upper,movable jaw 104″. Although the entirery of thetip portions 158″ may extend laterally all the way across the width of thenose portion 136″, it is also possible to have just anextension portion 158 b″ that protrudes from themain portion 158 a″ of thetip portion 158″ that extend all the way across the width of thenose portion 136″, as illustrated inFIGS. 9-12 . - Like the prior art shears 900, the
shears 100 according to the invention has an inner-facingsurface 138 on theguide member 120 and a hardenedsteel wear insert 142. - During operation of the
shears 100, a workpiece held between the lower, fixedjaw 102 and the upper,movable jaw 104 is cut or sheared by means of the steelblade insert members jaw 102. As the upper, movable jaw closes on the workpiece being sheared, the movable jaw is forced laterally slightly, away from the fixedblade member 116 and toward theguide member 120. As a result, theplanar surface 164 of the wear plate/piercingtip insert 150 will bear against and slide along thewear insert 142. - The metal demolition shears 100 can also be used to cut and demolish generally flattened scrap metal. In that case, if the sheet of scrap metal rests on the lower, fixed
jaw 102, the piercing tip portion PT of thenose portion 136 will make initial contact with the scrap metal as the shears are being operated and will pierce its way through the scrap metal workpiece. In that situation, the piercingedge 188 of thetip portion 158 that is in the operative position, along with the bottom-facing piercingedge 131, will operate to help the tip portion of thenose portion 136 pierce its way through the scrap metal workpiece. As the upper,movable jaw 104 continues to close relative to the lower, fixedjaw 102 and the tip portion TP pierces its way through the workpiece, the piercingedge 188, along with the bottom-facing piercingedge 131, will co-act with thecross member insert 146 to cut the metal workpiece in piercing fashion. Additionally, theshearing edge 190 of thetip portion 158 that is in the operative position will cooperate or co-act with the upper, inner-facing edge of thewear insert 142 to cut the flattened metal workpiece, in shearing fashion. - As a result of continued operation of the
shears 100, the various operative edges and surfaces of the wear plate/piercingtip insert 150, namely, the piercingedge 188, theshearing edge 190, and the portion of theplanar surface 164 that is disposed in the region of thetip portion 158 that is in the lower, operative position, will become dull, chipped, worn, or otherwise degraded in their functioning capacities. When the various edges and surfaces have become overly worn, a fresh set of piercing and shearing edges and a fresh wear surface portion of theplanar surface 164 can be presented simply by removing the cap screws or plowbolts 152, rotating the wear plate/piercingtip insert 150 by 180° around itspivot axis 168, and reinstalling and securing it back to thenose portion 136 of the upper,movable jaw 104 with the cap screws or plowbolts 152. - In yet another
embodiment 200 of a metal demolition shears according to the invention, as illustrated inFIG. 13 , two wear plate/shearing tip inserts 250 a and 250 b may be used, with one located on either side of thenose portion 236 of the movableupper jaw 204. In addition to each wear plate/shearing tip insert 250 a and 250 b being longitudinally symmetric, as defined above, the wear plate/shearing tip inserts 250 a and 250 b are “mirror image symmetric” with respect to each other. In other words, whereas the one wear plate/shearing tip insert 250 a angles up and to the right from one end to the other, as viewed straight on when it is attached to thenose portion 236 of the upper,movable jaw 204, the other wear plate/shearing tip insert 250 b angles up and to the left from the one end to the other, as viewed straight on when it is attached to thenose portion 236 of the upper,movable jaw 204. - The
nose portion 236 is, itself, configured to receive and seat the wear plate/piercing tip inserts 250 a and 250 b appropriately, with a “pocket” or “cavity” 274 that extends all the way across the width of the center “keel”portion 237 of thenose portion 236 and a notch or cut-out 278 that also extends all the way across thekeel portion 237. (Theforward blade insert 228 does not extend all the way forward.) In this embodiment, the two wear plate/piercing tip inserts 250 a and 250 b are bolted together using cap screws or bolts (not shown) passing through the bosses 266 (which seat withindepressions 282 on either side of the keel 237) and protrudingtip portions 258. This effectively sandwiches the keel portion between the wear plate/piercing tip inserts. - As a result, of this configuration, the
tip portions 258 provide the entire piercing tip function. Additionally, excellent wear protection is provided on both sides of the nose portion, and the configuration permits indexability of the wear plate/piercing tip inserts on each side of thejaw 204. Finally, although not illustrated, the configuration of the wear plate/piercing tip inserts 250 a and 250 b may also be such as to permit them to be interchanged from one side of thenose portion 236 to the other. - The embodiments of the invention described herein are illustrative, and the invention is not deemed to be limited to those specific embodiments. Modifications to the described invention will, of course, occur to those having skill in the art, and such modifications to the disclosed embodiment that are within the spirit of the invention are deemed to be embraced by the following claims.
Claims (41)
Priority Applications (12)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/697,554 US8146256B2 (en) | 2003-10-31 | 2003-10-31 | Metal demolition shears with indexable, integrated wear plate/piercing tip |
EP20040781758 EP1682299B1 (en) | 2003-10-31 | 2004-08-20 | Indexable insert with integrated wear plate and piercing tip for metal demolition shears |
DE200460006150 DE602004006150T2 (en) | 2003-10-31 | 2004-08-20 | REVERSIBLE INSERT WITH INTEGRATED WEAR PLATE AND THREADED TIP FOR METAL CUTTING SCISSORS |
AT04781758T ATE360498T1 (en) | 2003-10-31 | 2004-08-20 | REVERSIBLE INSERT WITH INTEGRATED WEAR PLATE AND PIERCING TIP FOR METAL DEMOLITION SHEARS |
PCT/US2004/027140 WO2005044493A1 (en) | 2003-10-31 | 2004-08-20 | Indexable insert with integrated wear plate and piercing tip for metal demolition shears |
ES04781758T ES2284057T3 (en) | 2003-10-31 | 2004-08-20 | ADJUSTABLE INSERT WITH INTEGRATED WEAR PLATE AND DRILLING POINT FOR METAL DEMOLITION SHEARS. |
DK04781758T DK1682299T3 (en) | 2003-10-31 | 2004-08-20 | Indexable insert with integrated wear plate and piercing tip for metal degradation scissors |
AU2004287782A AU2004287782B2 (en) | 2003-10-31 | 2004-08-20 | Indexable insert with integrated wear plate and piercing tip for metal demolition shears |
JP2006537977A JP4740867B2 (en) | 2003-10-31 | 2004-08-20 | Throw-away insert tool with integrated wear plate and drill tip for metal dismantling shear |
TW093127428A TW200518863A (en) | 2003-10-31 | 2004-09-10 | Metal demolition shears with indexable, integrated wear plate/piercing tip |
US13/352,947 US8650759B2 (en) | 2003-10-31 | 2012-01-18 | Metal demolition shears with indexable, integrated wear plate/piercing tip |
US13/530,699 US8327547B2 (en) | 2003-10-31 | 2012-06-22 | Metal demolition shears with indexable, integrated wear plate/piercing tip |
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US10/697,554 US8146256B2 (en) | 2003-10-31 | 2003-10-31 | Metal demolition shears with indexable, integrated wear plate/piercing tip |
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US13/352,947 Division US8650759B2 (en) | 2003-10-31 | 2012-01-18 | Metal demolition shears with indexable, integrated wear plate/piercing tip |
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US13/352,947 Expired - Lifetime US8650759B2 (en) | 2003-10-31 | 2012-01-18 | Metal demolition shears with indexable, integrated wear plate/piercing tip |
US13/530,699 Expired - Lifetime US8327547B2 (en) | 2003-10-31 | 2012-06-22 | Metal demolition shears with indexable, integrated wear plate/piercing tip |
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US13/352,947 Expired - Lifetime US8650759B2 (en) | 2003-10-31 | 2012-01-18 | Metal demolition shears with indexable, integrated wear plate/piercing tip |
US13/530,699 Expired - Lifetime US8327547B2 (en) | 2003-10-31 | 2012-06-22 | Metal demolition shears with indexable, integrated wear plate/piercing tip |
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US (3) | US8146256B2 (en) |
EP (1) | EP1682299B1 (en) |
JP (1) | JP4740867B2 (en) |
AT (1) | ATE360498T1 (en) |
AU (1) | AU2004287782B2 (en) |
DE (1) | DE602004006150T2 (en) |
DK (1) | DK1682299T3 (en) |
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US6119970A (en) * | 1998-11-25 | 2000-09-19 | Genesis Equipment & Manufacturing, Inc. | Heavy-duty demolition apparatus with replaceable crushing and shearing tip |
US20050199758A1 (en) * | 1999-10-15 | 2005-09-15 | Ramun John R. | Multiple tool attachment system |
US6994284B1 (en) * | 1999-10-15 | 2006-02-07 | Ramun John R | Multiple tool attachment system |
US20060086848A1 (en) * | 1999-10-15 | 2006-04-27 | Ramun John R | Multiple tool attachment system |
US6298560B1 (en) * | 2000-03-23 | 2001-10-09 | Daemo Engineering Co., Ltd. | Shear assembly |
US20060131454A1 (en) * | 2002-11-12 | 2006-06-22 | Ramun John R | Single jaw set multiple tool attachment system |
US20050091852A1 (en) * | 2003-10-31 | 2005-05-05 | Karl Johnson | Metal demolition shears with indexable, integrated wear plate/piercing tip |
US7044037B2 (en) * | 2004-04-21 | 2006-05-16 | John R. Ramun | Tip for demolition and construction equipment |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8646709B2 (en) * | 2012-04-11 | 2014-02-11 | John R. Ramun | Jaw set with serrated cutting blades |
Also Published As
Publication number | Publication date |
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ES2284057T3 (en) | 2007-11-01 |
AU2004287782B2 (en) | 2009-04-30 |
DK1682299T3 (en) | 2007-09-10 |
US20050091852A1 (en) | 2005-05-05 |
DE602004006150T2 (en) | 2007-12-27 |
EP1682299B1 (en) | 2007-04-25 |
AU2004287782A1 (en) | 2005-05-19 |
JP2007509766A (en) | 2007-04-19 |
JP4740867B2 (en) | 2011-08-03 |
US8650759B2 (en) | 2014-02-18 |
EP1682299A1 (en) | 2006-07-26 |
US20120111171A1 (en) | 2012-05-10 |
ATE360498T1 (en) | 2007-05-15 |
WO2005044493A1 (en) | 2005-05-19 |
US8327547B2 (en) | 2012-12-11 |
US20120255181A1 (en) | 2012-10-11 |
TW200518863A (en) | 2005-06-16 |
DE602004006150D1 (en) | 2007-06-06 |
US8146256B2 (en) | 2012-04-03 |
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