BENDER FOR CONTOURING SURGICAL IMPLANTS

• US 3,866,458 A
• Filed: 11/12/1973
• Issued: 02/18/1975
• Est. Priority Date: 11/12/1973
• Status: Expired due to Term

• Current Assignee: Richard F. Wagner
• Original Assignee: Richard F. Wagner
• Inventors: Wagner, Richard F.
• Primary Examiner(s): Herbst, Richard J.
• Assistant Examiner(s): Keenan, M. J.
• Application Number:
  US05/414,811
• Time in Patent Office: 463 Days
• Field of Search: 72/458,459,460,478,479,480,295 269/2,40,87.2,91 81/3,3.43 128/33R,346
• US Class Current: 72/459
• CPC Class Codes: A61B 17/8863 Apparatus for shaping or cutting osteosynthesis equipment by medical personnel

Abstract

A pair of benders for contouring surgical implants, particularly a hip fixation plate having a flat bowl-shaped head portion with four transverse bores and an elongated handle portion. One of the benders grips the bowl portion of the plate and consists of an upper and lower jaw pivotally interconnected at their one end and means, such as a swing bolt and associated wing nut, for releasably interconnecting their other ends. The inner surface of the upper jaw has four nipples which register with and slidably engage the transverse bores of the bowl portion when the jaws are clamped over the same. The inner surface of the lower jaw has a dome-shaped protrusion against which the inside of the bowl portion seats. A handle is attached to the bottom of the lower jaw for gripping purposes. The second of the benders grips the handle portion of the plate and consists of a housing having a longitudinal channel extending through it, a jaw member disposed within said channel and adapted for vertical movement therein and means for raising and lowering the jaw member. The top side of the channel is contoured to conform to the handle portion and the top side of the jaw member is similarly contoured and spaced from the top side of the channel. The handle portion is gripped by sliding it into that space and raising the jaw member.

Claims

1. A bender for a bending assembly, for gripping a surgical implant having opposed sides comprising:

a. a housing;

b. a channel extending through said housing, the surface defining one side of said channel being contoured to conform to the contour of one of said opposed sides of said surgical implant;

c. a jaw member disposed within said channel and adapted for vertical movement therein, one side of said jaw member being spaced from said surface defining one side of said channel and being contoured to conform to the contour of the other of said opposed sides of the surgical implant;

d. means interconnecting the side of said jaw member opposite said one side thereof and the housing; and

e. means for vertically raising and lowering said jaw member within said channel whereby said implant may be gripped between said surface defining one side of said channel and said one side of said jaw member and released thereby, respectively.

2. a lower jaw, the inner surface of which has a protrusion which is adapted to seat snugly against one side of said head portion,

3. The bender according to claim 1 wherein said means for vertically raising and lowering said jaw member includes:

f. a threaded bore extending through said housing to said channel; and

g. a handle having a threaded end which is adapted to be screw threadedly received in said threaded bore and bear against the side of said jaw member opposite said one side thereof.

4. means interconnecting the side of said jaw member opposite said one side thereof and the housing, and

5. means for vertically raising and lowering said jaw member within said channel whereby said handle portion may be gripped between said surface defining one side of said channel and said one side of said jaw member and released thereby, respectively;

and b. a second bender including;

6. The bender according to claim 5 wherein said means for releasably interconnecting the other of their ends includes:

e. a swing bolt one end of which is pivotally attached to the upper jaw and the other end of which is threaded;

f. a way in said lower jaw adapted to receive said other end of said swing bolt; and

g. a nut adapted to be screw threadedly received on said other end of said swing bolt and seat against a side of said lower jaw.

7. The bender according to claim 5 wherein said means for pivotally interconnecting said upper and lower jaws includes:

e. a pair of spaced vertical ways in each of said one ends of said upper and lower jaws;

f. a pair of vertical bars received in said ways and interconnecting said upper and lower jaws; and

g. a pair of pins extending transversely of each of said ways on which said bars are journaled.

8. The bender according to claim 5 including:

e. a handle affixed to the bottom of said lower jaw.

9. The bender according to claim 5 including:

e. an anvil plate affixed to at least one of said jaws and positioned and adapted to engage the junction between said handle portion and said head portion during the bending process.

10. A bender for a bending assembly, for gripping and bending a hip fixation plate comprising a flat bowl-shaped head portion having four transverse bores and an elongated handle portion comprising:

a. an upper jaw having four nipples on its inner surface which register with and are adapted to be slidably received within said transverse bores when said plate is gripped;

b. a lower jaw, the inner surface of which has a dome-shaped protrusion which is adapted to seat snugly against one side of said head portion when said plate is gripped;

c. a pair of vertical ways in one end of each of said lower and upper jaws;

d. a pair of pins transversing said ways at the top and bottom thereof;

e. a pair of bars adapted to be received within said ways and journaled about said pins whereby said upper and lower jaws are pivotally interconnected at one of their ends;

f. a swing bolt, one end of which is pivotally attached to the other end of the upper jaw and the other end of which is threaded;

g. a way in said lower jaw adapted to receive said other end of said swing bolt;

h. a nut adapted to be screw threadedly received on said other end of said swing bolt and seat against the bottom of the lower jaw when said plate is gripped;

i. a handle affixed to the bottom of the lower jaw; and

j. an anvil plate affixed to at least one of said jaws and positioned and adapted to engage the junction between said handle portion and said head portion when said plate is bent.

11. A bending assembly for use in bending a hip fixation plate comprising a flat bowl-shaped head portion having at least one transverse bore and an integral elongated handle portion having opposed sides, comprising the combination of:

a. a first bender including;

1. a housing, 2. a channel extending through said housing, the surface defining one side of said channel being contoured to conform to the contour of one of said opposed sides of said handle portion, 3. a jaw member disposed within said channel and adapted for vertical movement therein, one side of said jaw member being spaced from said surface defining one side of said channel and being contoured to conform to the contour of the other of said opposed sides of the handle portion, 4. means interconnecting the side of said jaw member opposite said one side thereof and the housing, and 5. means for vertically raising and lowering said jaw member within said channel whereby said handle portion may be gripped between said surface defining one side of said channel and said one side of said jaw member and released thereby, respectively; and

b. a second bender including;

1. an upper jaw having a nipple on its inner surface which registers with and is adapted to be slidably received within said transverse bore, 2. a lower jaw, the inner surface of which has a protrusion which is adapted to seat snugly against one side of said head portion, 3. means for pivotally interconnecting said upper and lower jaws at one of their ends, and 4. means for releasably interconnecting the other of their ends.