US5498265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screw and driver
Assignee: Howmedica Osteonics Corp
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Filing: 1994-04-01
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Granted: 1996-03-12
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Expires: 2014-04-01
Abstract
Abstract An implant comprising a specially adapted bone screw having a threaded shank portion and a sleeve which mates with and operates in cooperation with the threaded shank portion is provided. Also provided is a driver specially adapted for inserting and removing the implant of the invention. A method of compressing a fracture in a bone is also provided. The implant generates bone compression by itself and can be used either alone or with plates and washers. It is easily inserted into a fracture and also is easily removed from the fracture. The driver which is specially adapted to be used in combination with the implant of the invention aids in the ease of insertion and removal of the implant.
Inventors
- 👤 Stanley E. Asnis
- 👤 John S. Crombie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:28
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/84; A61B17/86; A61B17/8685; A61B17/74; A61B17/88; A61B17/8875; A61B17/8605; A61B17/861
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
148 words
A variable length implant comprising in a connected relationship: (a) a threaded shank having: (1) a distal threaded shank portion having a bone thread and having a distal end and (2) a proximal threaded shank portion having a machine thread and having a proximal end, wherein said bone thread and said machine thread are of opposite hand (b) a sleeve having a head and having an inner threading which threads with said proximal threaded shank portion, so as to result in an implant having a maximum implant length and a minimum implant length; and (c) a connector means which connects said sleeve near said distal end of said sleeve with said proximal threaded shank portion near said proximal end of said proximal threaded shank portion but which permits said sleeve to move longitudinally with respect to said distal threaded shank portion after said maximum implant length is reached.
Claim 2
Dependent Claim
148 words
A variable length implant comprising in a connected relationship: (a) a threaded shank having: (1) a distal threaded shank portion having a bone thread and having a distal end and (2) a proximal threaded shank portion having a machine thread and having a proximal end, wherein said bone thread and said machine thread are of opposite hand (b) a sleeve having a head and having an inner threading which threads with said proximal threaded shank portion, so as to result in an implant having a maximum implant length and a minimum implant length; and (c) a connector means which connects said sleeve near said distal end of said sleeve with said proximal threaded shank portion near said proximal end of said proximal threaded shank portion but which permits said sleeve to move longitudinally with respect to said distal threaded shank portion after said maximum implant length is reached.
Claim 3
Dependent Claim
41 words
An implant according to claim 1, wherein said connector means comprises a deformation of the first full thread in said proximal threaded shank portion and wherein said sleeve is not weakened by the presence of any aperture along said cylindrical surface.
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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) | 1999-03-12 | 1999-09-11 | 2000-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-03-12 | 2003-09-11 | 2004-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-03-12 | 2007-09-11 | 2008-03-12 | $7700.00 | Window Closed / Lapsed |