US5049150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool for gripping a bone fragment
Assignee: Zimmer Technology Inc
•
Filing: 1990-12-27
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Granted: 1991-09-17
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Expires: 2010-12-27
Abstract
Abstract A tool for gripping a bone fragment is provided. A first member is engaged with the bone fragment while a second member is carried by the first member to prevent rotation of the bone fragment.
Inventors
- 👤 Trent E. Cozad, deceased
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:54
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/88; A61B17/8866; A61B17/16; A61B17/1662; A61B17/1664; A61B17/1668
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
145 words
An orthopaedic extractor for removing a bone fragment from a main bone mass comprising a first member including threads at one end for engaging the fragment and an enlarged integral handle on an opposite end the threads to permit turning of the threads into the fragment and manipulation of the fragment away from the main bone mass once it is engaged; and a second tubular member configured for movably carrying the first member, the second member including teeth at one end for engaging the bone fragment and preventing rotation of the fragment and defining a length such that when an opposite end of said second member abuts the handle, the length of the tube does not extend past the threaded and of the first member; whereby the second member prevents rotation of the bone fragment while the first member is threaded into the bone fragment.
Claim 2
Dependent Claim
145 words
An orthopaedic extractor for removing a bone fragment from a main bone mass comprising a first member including threads at one end for engaging the fragment and an enlarged integral handle on an opposite end the threads to permit turning of the threads into the fragment and manipulation of the fragment away from the main bone mass once it is engaged; and a second tubular member configured for movably carrying the first member, the second member including teeth at one end for engaging the bone fragment and preventing rotation of the fragment and defining a length such that when an opposite end of said second member abuts the handle, the length of the tube does not extend past the threaded and of the first member; whereby the second member prevents rotation of the bone fragment while the first member is threaded into the bone fragment.
Claim 3
Dependent Claim
53 words
The tool of claim 1 in which the first member means is defined by a threaded end for engagement with the bone fragments and the first member includes a handle opposite from the threaded end and the second member means is defined by teeth at one end for engagement with the bone fragments.
Claim 4
Dependent Claim
21 words
The tool of claim 2 in which the second member is further provided with a knurled surface opposite the one end.
Claim 5
Dependent Claim
32 words
The tool of claim 3 in which the second member defines a smooth surface separating the teeth from the knurled surface in order to space the knurled surface from the bone fragments.
References Cited (Backward Citations)
US3892232A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-16 | 1995-03-18 | 1995-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-16 | 1999-03-18 | 1999-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-16 | 2003-03-18 | 2003-09-17 | $7700.00 | Window Closed / Lapsed |