US4187559A — Body joint endoprosthesis

Claim 1

Independent Claim 98 words

A body joint endoprosthesis comprising: an anchoring part comprising a shaft adapted to be anchored in a first bone; a pivot member comprising a first joint member and a support element adapted to bear against a seating surface of the first bone, said pivot member being connected to said anchoring part by a joint that permits said support element to pivot in a direction substantially normal to said seating surface; and a second joint member adapted to be connected to a second bone, with said first joint member and said second joint member forming a body implant joint.

Claim 2

Dependent Claim 98 words

A body joint endoprosthesis comprising: an anchoring part comprising a shaft adapted to be anchored in a first bone; a pivot member comprising a first joint member and a support element adapted to bear against a seating surface of the first bone, said pivot member being connected to said anchoring part by a joint that permits said support element to pivot in a direction substantially normal to said seating surface; and a second joint member adapted to be connected to a second bone, with said first joint member and said second joint member forming a body implant joint.

Claim 3

Dependent Claim 21 words

A body joint endoprosthesis according to claim 1 wherein said anchoring part comprises an extension member releasably connected to said shaft.

Claim 4

Dependent Claim 51 words

A body joint endoprosthesis according to claim 2 wherein there is a cone, having a tapped bore, at an end of said shaft and said extension member comprises a complementary conical socket mounted upon said cone and a screw, inserted into said tapped bore, that urges said socket against said cone.

Claim 5

Dependent Claim 16 words

A body joint endoprosthesis according to claim 1 wherein said pivot joint is a hinge joint.

Claim 6

Dependent Claim 16 words

A body joint endoprosthesis according to claim 1 wherein said pivot joint is a ball joint.

Claim 7

Dependent Claim 16 words

A body joint endoprosthesis according to claim 1 wherein the pivot joint is a Cardan joint.

Claim 8

Dependent Claim 17 words

A body joint endoprosthesis according to claim 1 wherein the pivot joint is a knife bearing joint.

Claim 9

Dependent Claim 16 words

A body joint endoprosthesis according to claim 1 wherein the pivot joint is an elastic joint.

Claim 10

Dependent Claim 37 words

A body joint endoprosthesis according to claim 8, wherein the pivot joint comprises at least one prestressed resilient member that connects said anchoring part to said pivot member and urges said support element toward said seating surface.

Claim 11

Dependent Claim 16 words

A body joint endoprosthesis according to claim 9 wherein said resilient member is a leaf spring.

Claim 12

Dependent Claim 31 words

A body joint endoprosthesis according to claim 9, wherein two resilient members are arranged for pivotal movement in a common plane and are spaced from one another in a parallelogram arrangement.

Claim 13

Dependent Claim 28 words

A body joint endoprosthesis according to claim 1 wherein a spring, located between said anchoring part and said pivot member, urges said support element toward said seating surface.

Claim 14

Dependent Claim 31 words

A body joint endoprosthesis according to claim 12 wherein said spring is located between the pivot member and a clamping screw screwed into a pivotable stud mounted on said anchoring part.

Claim 15

Dependent Claim 34 words

A hip joint endoprosthesis according to claim 1 wherein the first bone is a thigh bone, the first joint member comprises a ball, and the support element comprises a collar secured to said ball.

Claim 16

Dependent Claim 30 words

A hip joint endoprosthesis according to claim 14 wherein said pivot member pivots about a point or an axis located at least approximately in a plane containing said seating surface.

Claim 17

Dependent Claim 34 words

A hip joint endoprosthesis according to claim 14 wherein said second bone comprises a pelvic bone and said second joint member comprises a ball socket having button-like studs for anchorage in the pelvic bone.

Claim 18

Dependent Claim 46 words

A hip joint endoprosthesis according to claim 16 wherein said ball socket includes first, second and third studs arranged at the corners of a triangle so that the maximum resultant force upon the body joint passes substantially through the surface center of gravity of said triangle.

Claim 19

Dependent Claim 36 words

A hip joint endoprosthesis according to claim 17 wherein said first stud is located near the apex of said socket and said second and third studs are located at substantially one-half the height of said socket.

Claim 20

Dependent Claim 53 words

A hip joint endoprosthesis according to claim 18 wherein the axes of said first, second and third studs lie in substantially mutually parallel planes, and the axes of said second and third studs enclose greater angles than the axis of said first stud with normals to a base surface of said ball socket.

Claim 21

Dependent Claim 39 words

A hip joint endoprosthesis according to claim 19 wherein said first stud has a circumferential channel at its foot and said second and third studs each have an undercut configuration directed outwardly from the axis of said ball socket.

Claim 22

Dependent Claim 64 words

A hip joint endoprosthesis according to claim 18 wherein the edge of said ball socket includes a cavity, said cavity beginning at least approximate in a plane that extends through the axis of the socket and through said second stud, said cavity extending over an annular range of at least about 120° to the side of the ball socket remote from said third stud.

Claim 23

Dependent Claim 33 words

A hip joint endoprosthesis according to claim 16 wherein said ball socket has a plurality of concentric channels and a plurality of channels lying in planes passing through the axis of the socket.

Claim 24

Dependent Claim 42 words

An elbow joint endoprosthesis according to claim 1 wherein said first bone is an upper arm bone, the first joint member comprises a hinge pin and the support element comprises two spaced condylar shells connected to the ends of said hinge pin.

Claim 25

Dependent Claim 23 words

An elbow joint endoprosthesis according to claim 23 wherein each condylar shell includes a support arm bearing a part of the pivot joint.

Claim 26

Dependent Claim 24 words

An elbow joint endoprosthesis according to claim 23 wherein the anchoring part includes a stop for limiting pivotal movement of the second joint member.

Claim 27

Dependent Claim 40 words

An elbow joint endoprosthesis according to claim 23 wherein the second bone is an ulna, the second joint member comprises a bearing shell for the hinge pin, and the bearing shell is provided with projections for anchorage to the ulna.

Claim 28

Dependent Claim 22 words

An elbow joint endoprosthesis according to claim 26 wherein end faces of the bearing shell are axially guided by the condylar shells.

Claim 29

Dependent Claim 104 words

An elbow joint endoprosthesis comprising: an anchoring part comprising a shaft adapted to be anchored in an upper arm bone; a pivot member connected to said anchoring part by a pivot joint, said pivot member comprising a hinge pin and two spaced condylar shells connected to the ends of said hinge pin and adapted to bear against a seating surface of said upper arm bone, said hinge pin and said condylar shells being made in one piece; and a second joint member adapted to be connected to a second bone, with said hinge pin and said second joint member forming an elbow implant joint.

Claim 30

Dependent Claim 104 words

An elbow joint endoprosthesis comprising: an anchoring part comprising a shaft adapted to be anchored in an upper arm bone; a pivot member connected to said anchoring part by a pivot joint, said pivot member comprising a hinge pin and two spaced condylar shells connected to the ends of said hinge pin and adapted to bear against a seating surface of said upper arm bone, said hinge pin and said condylar shells being made in one piece; and a second joint member adapted to be connected to a second bone, with said hinge pin and said second joint member forming an elbow implant joint.

Claim 31

Dependent Claim 117 words

An elbow joint endoprosthesis comprising: an anchoring part comprising a shaft adapted to be anchored in an upper arm bone; a pivot member connected to said anchoring part by a pivot joint, said pivot member comprising a hinge pin and two spaced condylar shells adapted to bear against a seating surface of said upper arm bone, said hinge pin being connected to each of said condylar shells by a short connecting piece, with the part of each shell free from the connecting piece containing a perforation for a bone screw; and a second joint member adapted to be connected to a second bone, with said hinge pin and said second joint member forming an elbow implant joint.

Claim 32

Dependent Claim 117 words

An elbow joint endoprosthesis comprising: an anchoring part comprising a shaft adapted to be anchored in an upper arm bone; a pivot member connected to said anchoring part by a pivot joint, said pivot member comprising a hinge pin and two spaced condylar shells adapted to bear against a seating surface of said upper arm bone, said hinge pin being connected to each of said condylar shells by a short connecting piece, with the part of each shell free from the connecting piece containing a perforation for a bone screw; and a second joint member adapted to be connected to a second bone, with said hinge pin and said second joint member forming an elbow implant joint.

Claim 33

Dependent Claim 29 words

An elbow joint endoprosthesis according to claim 29, wherein each connecting piece is located only in the peripheral region of the hinge pin surrounded by the associated condylar shell.

Claim 34

Dependent Claim 127 words

An elbow joint endoprosthesis comprising: an anchoring part comprising a stop and a shaft adapted to be anchored in an upper arm bone; a pivot member connected to said anchoring part by a pivot joint, said pivot member comprising a hinge pin and two spaced condylar shells adapted to bear against a seating surface of the upper arm bone; and a cylindrical half shell adapted to be connected to an ulna and having projections for anchorage to the ulna, said shell having an end face comprising an abutment surface for making contact with said stop in the extended position of the upper arm bone and ulna, with said hinge pin and said shell forming an elbow implant joint and said stop limiting pivotal movement of said shell.

Claim 35

Dependent Claim 127 words

An elbow joint endoprosthesis comprising: an anchoring part comprising a stop and a shaft adapted to be anchored in an upper arm bone; a pivot member connected to said anchoring part by a pivot joint, said pivot member comprising a hinge pin and two spaced condylar shells adapted to bear against a seating surface of the upper arm bone; and a cylindrical half shell adapted to be connected to an ulna and having projections for anchorage to the ulna, said shell having an end face comprising an abutment surface for making contact with said stop in the extended position of the upper arm bone and ulna, with said hinge pin and said shell forming an elbow implant joint and said stop limiting pivotal movement of said shell.

Claim 36

Dependent Claim 123 words

An elbow joint endoprosthesis comprising: an anchoring part comprising a shaft adapted to be anchored in an upper arm bone; a pivot member connected to said anchoring part by a pivot joint, said pivot member comprising a hinge pin and two spaced condylar shells adapted to bear against a seating surface of the upper arm bone; and a bearing shell adapted to be connected to an ulna, with said hinge pin and said bearing shell forming an elbow implant joint, said shell having anchorage projections located in the central transverse plane of said bearing shell for anchorage to the ulna, said anchorage projections comprising a stud having a peripheral channel and a tongue directed away from the stud and spaced from the stud.

Claim 37

Dependent Claim 123 words

An elbow joint endoprosthesis comprising: an anchoring part comprising a shaft adapted to be anchored in an upper arm bone; a pivot member connected to said anchoring part by a pivot joint, said pivot member comprising a hinge pin and two spaced condylar shells adapted to bear against a seating surface of the upper arm bone; and a bearing shell adapted to be connected to an ulna, with said hinge pin and said bearing shell forming an elbow implant joint, said shell having anchorage projections located in the central transverse plane of said bearing shell for anchorage to the ulna, said anchorage projections comprising a stud having a peripheral channel and a tongue directed away from the stud and spaced from the stud.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1983-02-11	1983-08-13	1984-02-12	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1987-02-11	1987-08-13	1988-02-12	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1991-02-11	1991-08-13	1992-02-12	$7700.00	Window Closed / Lapsed

Body joint endoprosthesis

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag