US5064427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for inserting and withdrawing humeral prosthesis
Assignee: Zimmer Inc
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Filing: 1991-05-14
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Granted: 1991-11-12
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Expires: 2011-05-14
Abstract
Abstract An apparatus for inserting and withdrawing a prosthesis into and out of the humerus comprising a sleeve and taper protector which fit over a neck on the humeral prosthesis. A shaft delivers the force of an impact hammer to the prosthesis to drive the prosthesis into the bone. The prosthesis is locked into the sleeve by a pivoting arm which has tabs which permit prosthesis to be withdrawn from the humerus. An orthogonal handle and bolt serve both to tighten the pivot arm against the prosthesis and to provide accurate angular orientation for implanting the prosthesis.
Inventors
- 👤 Brian D. Burkinshaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:10
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/46; A61F2/4603; A61F2/4612; A61F2002/4619; A61F2002/4625; A61F2002/4628; A61F2002/4681
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
70 words
An apparatus for inserting and withdrawing a humeral prosthesis from a humerus, the apparatus comprising a shaft for transmitting forces to the prosthesis; a sleeve mounted on a distal end of said shaft, said sleeve having a central bore oriented at an acute angle with respect to said shaft for receiving a neck of said prosthesis; and pivoting arm means pivotally connected to said shaft for clamping against said prosthesis.
Claim 2
Independent Claim
70 words
An apparatus for inserting and withdrawing a humeral prosthesis from a humerus, the apparatus comprising a shaft for transmitting forces to the prosthesis; a sleeve mounted on a distal end of said shaft, said sleeve having a central bore oriented at an acute angle with respect to said shaft for receiving a neck of said prosthesis; and pivoting arm means pivotally connected to said shaft for clamping against said prosthesis.
Claim 3
Dependent Claim
18 words
The apparatus according to claim 1 further comprising means for tightening said pivoting arm means against said prosthesis.
Claim 4
Dependent Claim
33 words
The apparatus according to claim 2 wherein the tightening means comprise a pivot bolt connected to said shaft and passing through said pivot arm and a handle threadedly connected to said pivot bolt.
Claim 5
Dependent Claim
26 words
The apparatus according to claim 3 wherein the pivot arm further comprises at least one tab adjacent said prosthesis for engaging a recess in said prosthesis.
Claim 6
Dependent Claim
23 words
The apparatus according to claim 4 wherein the pivot arm comprises stabilizer means defining a slot for engaging a fin on said prosthesis.
Claim 7
Dependent Claim
22 words
The apparatus according to claim 5 further comprising neck protector means received within said sleeve for protecting said neck of said prosthesis.
References Cited (Backward Citations)
US3818514A
Cited
US3857389A
Cited
US4222382A
Cited
US4642121A
Cited
FR2615097A1
Cited
US4964865A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-11-11 | 1995-05-13 | 1995-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-11 | 1999-05-13 | 1999-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-11 | 2003-05-13 | 2003-11-12 | $7700.00 | Window Closed / Lapsed |