US4944744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bone impactors
Assignee: Surgical Dynamics Inc
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Filing: 1986-07-17
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Granted: 1990-07-31
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Expires: 2006-07-17
Abstract
Abstract A bone impactor consists of a single piece of lightweight metal which has a handle and a smooth shank, across the tip of which extends a working surface that may be fitted against an excrescence, followed by striking the butt end of the handle to compress the excrescence into the bone to relieve pressure on a nerve. The shank of the bone impactor terminates in a foot that tapers to a toe, and a flat working surface beneath the foot makes an angle of at least 95° with the longitudinal axis of the shank.
Inventors
- 👤 Charles D. Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:17
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/16; A61B17/1604; A61B90/00; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/46; A61F2/4601; A61F2/28; A61F2002/2835; A61F2002/2839; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30113; A61F2002/30118; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0006
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
75 words
A bone impactor which is useful for compressing a bone excrescence to relieve pressure on a nerve and comprises a handle and a shank which terminates in a foot that tapers to a thin toe, and a flat working surface beneath the foot that makes an angle of at least 95° with the longitudinal axis of the shank of the impactor, each edge of the working surface having a radius of at least 0.1 mm.
Claim 2
Dependent Claim
75 words
A bone impactor which is useful for compressing a bone excrescence to relieve pressure on a nerve and comprises a handle and a shank which terminates in a foot that tapers to a thin toe, and a flat working surface beneath the foot that makes an angle of at least 95° with the longitudinal axis of the shank of the impactor, each edge of the working surface having a radius of at least 0.1 mm.
Claim 3
Dependent Claim
27 words
A bone impactor as defined in claim 1 wherein said angle angle is not more than about 125° and the flat working surface is formed with knurls.
Claim 4
Dependent Claim
35 words
A bone impactor as defined in claim 2 wherein the thickness of the toe at its extremity is about 1.0 mm, and the foot is about 3.0 mm thick where it diverges from the shank.
Claim 5
Dependent Claim
15 words
A bone impactor as defined in claim 1 wherein said angle is about 150° .
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-30 | 1994-01-29 | 1994-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-30 | 1998-01-29 | 1998-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-30 | 2002-01-29 | 2002-07-31 | $7700.00 | Window Closed / Lapsed |