US5015817A
Expired / Lapsed
US
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Method for producing a hollow shaft endoprosthesis
Assignee: Johnson and Johnson
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Filing: 1989-12-21
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Granted: 1991-05-14
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Expires: 2009-12-21
Abstract
Abstract Method for producing a hollow shaft endoprosthesis, in particular a hip joint prosthesis, comprising the following stages: Producing two half-tubings, which may be connected together to form the shape of the shaft of the prosthesis, whereby they touch in the region of two welding seams substantially running in a longitudinal direction, by moulding or forging, welding together both moulded or forged half-tubings in the region of the welding seams.
Inventors
- 👤 Curt Kranz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:12
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/36; A61F2/3662; A61F2/30767; A61F2/3094; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30113; A61F2002/30199; A61F2002/30224; A61F2002/30235; A61F2002/30237; A61F2002/30316; A61F2002/30317; A61F2002/30324; A61F2002/30329; A61F2002/30451; A61F2002/30476; A61F2002/30495; A61F2002/30535; A61F2002/30561; A61F2002/30593; A61F2/30771; A61F2002/30772; A61F2002/30784; A61F2002/30785; A61F2002/30787; A61F2002/30795; A61F2002/30975; A61F2/3609; A61F2002/365; A61F2002/3652; A61F2002/3678; A61F2002/368; A61F2220/00; A61F2220/0025; A61F2220/0058; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0006; A61F2230/0063; A61F2230/0069; A61F2250/00; A61F2250/0014; A61F2250/0036; A61F2250/0058; A61F2250/0071; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00023; A61F2310/00389; A61F2310/00592; A61F2310/00796; Y; Y10; Y10S; Y10S623/00; Y10S623/901; Y10S623/909; Y10S623/911
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
71 words
Method for producing a hollow shaft endoprosthesis, in particular a hip joint prosthesis, comprising the following steps: Producing two half-tubings, which may be connected together to form the shape of the shaft of the prosthesis, whereby said half-tubings touch in the region of two welding seams substantially running in a longitudinal direction, by one of moulding and forging, and welding together both said half-tubings in the region of said welding seams.
Claim 2
Dependent Claim
71 words
Method for producing a hollow shaft endoprosthesis, in particular a hip joint prosthesis, comprising the following steps: Producing two half-tubings, which may be connected together to form the shape of the shaft of the prosthesis, whereby said half-tubings touch in the region of two welding seams substantially running in a longitudinal direction, by one of moulding and forging, and welding together both said half-tubings in the region of said welding seams.
Claim 3
Dependent Claim
17 words
Method as defined in claim 1, wherein the said half-tubings consist of a titanium-aluminum-vanadium (TiA16V4) wrought alloy.
Claim 4
Dependent Claim
46 words
Method as defined in claim 1, wherein said half-tubings have a joint end and an end away from said joint end, and a continually diminishing thickness of the said half-tubings from the joint end to the end away from the joint end is refined and finished.
Claim 5
Dependent Claim
20 words
Method as defined in claim 1, wherein said producing step includes forming openings in an outer side of said half-tubings.
Claim 6
Dependent Claim
63 words
Method as defined in claim 4, wherein said openings on the outer side of said shaft are covered over, a shaft opening far away from the joint end is plugged, the hollow area of said shaft is filled with polyethylene, the coverings and the plug are removed and the surface of the polyethylene is covered with apatite in the region of said openings.
Claim 7
Dependent Claim
33 words
Method as defined in claim 1, wherein said producing step includes forming said half-tubings with convex outer surfaces, and recesses are formed convex outer surfaces of said half-tubing and filled with Porocoat material.
Claim 8
Dependent Claim
29 words
Method as defined in claim 1, wherein said producing step includes said half-tubings with concave inner surfaces, and recesses are formed in the concave inner surfaces of said half-tubings.
Claim 9
Dependent Claim
35 words
Method as defined in claim 1, wherein said half-tubings have a joint end and an end away from said joint end, and an attachment cone is welded onto the joint end of said hollow shaft.
Claim 10
Dependent Claim
47 words
Method as defined in claim 1, wherein said half-tubings have a joint end and an end away from said joint end, and an attachment cone is detachably connected to the joint end of said hollow shaft by means of a bracing ring with a predetermined breaking point.
Claim 11
Dependent Claim
16 words
Method as defined in claim 1, wherein said half-tubings are welded together by electron beam welding.
Claim 12
Dependent Claim
41 words
Method as defined in claim 8, wherein said welding seams between said two half-tubings and said welding seam between said attachment cone and the joint end of said hollow shaft are planned by one of manual planing and a planing device.
Claim 13
Dependent Claim
25 words
Method as defined in claim 8, wherein said welding seams between said two half-tubings are planned by one of manual planing and a planing device.
Claim 14
Dependent Claim
24 words
Method as defined in claim 8, wherein said welding seam between said attachment cone and the joint end of said hollow shaft is planed.
Claim 15
Dependent Claim
47 words
Method as defined in claim 1, wherein said half-tubings have a joint end and an end away from said joint end, and a continually diminishing thickness of the said half-tubings from the joint end to the end away from the joint end is produced by chemical milling.
Claim 16
Dependent Claim
27 words
Method as defined in claim 1, wherein said producing step includes forming openings in an outer side of said half-tubings, and said openings are deburred and planed.
Claim 17
Dependent Claim
63 words
Method as defined in claim 15, wherein said openings on the outer side of said shaft are covered over, a shaft opening far away from the joint end is plugged, the hollow area of said shaft is filled with polyethylene, the coverings and the plug are removed and the surface of the polyethylene is covered with apatite in the region of said openings.
Claim 18
Dependent Claim
35 words
Method as defined in claim 14, wherein said producing step includes forming said half-tubings with convex outer surfaces, and recesses are formed in the convex outer surfaces of said half-tubings and filled with Porocoat material.
Claim 19
Dependent Claim
30 words
Method as defined in claim 14, wherein said producing step includes forming said half-tubings with concave inner surfaces, and recesses are formed in the concave inner surfaces of said half-tubings.
Claim 20
Dependent Claim
35 words
Method as defined in claim 14, wherein said half-tubings have a joint end and an end away from said joint end, and an attachment cone is welded onto the joint end of said hollow shaft.
Claim 21
Dependent Claim
43 words
Method as defined in claim 14, wherein said half-tubings have a joint end and an end away from said joint end, and an attachment cone is detachably connected to the joint end by means of a bracing ring with a predetermined breaking point.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-05-13 | 1994-11-12 | 1995-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-13 | 1998-11-12 | 1999-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-13 | 2002-11-12 | 2003-05-14 | $7700.00 | Window Closed / Lapsed |