Patent US5649931A successfully refreshed from Google Patents.
US5649931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Orthopaedic apparatus for driving and/or removing a bone screw
Assignee: Zimmer Technology Inc
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Filing: 1996-01-16
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Granted: 1997-07-22
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Expires: 2016-01-16
Abstract
Abstract The invention is directed to an orthopaedic apparatus 10 for at least one of removing and driving an elongated fixation member 12 having an enlarged head 22. The orthopaedic apparatus 10 includes a hollow, elongated body 14 having an open end 26 for receiving the enlarged head 22 therein. The body 14 further has a deflectable portion 28 at the open end. A shaft 16 is disposed within the body, and has a distal end 34 disposed substantially adjacent to the body open end. The distal end 34 has an exterior configuration which is adapted to mate with the enlarged head. The deflectable portion is configured to impart a radially inward force around the enlarged head and the shaft is configured to impart an axial compression force on the enlarged head, thereby locking the elongated fixation member relative to the orthopaedic apparatus.
Inventors
- 👤 Mark A. Bryant
- 👤 John E. Meyers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:30
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/88; A61B17/8875; A61B17/8886; A61B17/8891
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
160 words
An orthopaedic apparatus for at least one of removing and driving an elongated fixation member having an enlarged head, said orthopaedic apparatus comprising: a hollow, elongated body having an open end for receiving the enlarged head therein, said body further having a deflectable portion at said open end; and a shaft disposed within said body, said shaft having a distal end disposed substantially adjacent to said body open end, said distal end having an exterior configuration adapted to mate with the enlarged head; and a thumb screw threadingly engaging said body at an end opposite said open end, said thumb screw configured to engage an end of said shaft and bias said shaft toward said body open end; whereby said deflectable portion is configured to impart a radially inward force around the enlarged head and said shaft is configured to impart an axial compression force on the enlarged head, thereby locking the elongated fixation member relative to said orthopaedic apparatus.
Claim 2
Dependent Claim
160 words
An orthopaedic apparatus for at least one of removing and driving an elongated fixation member having an enlarged head, said orthopaedic apparatus comprising: a hollow, elongated body having an open end for receiving the enlarged head therein, said body further having a deflectable portion at said open end; and a shaft disposed within said body, said shaft having a distal end disposed substantially adjacent to said body open end, said distal end having an exterior configuration adapted to mate with the enlarged head; and a thumb screw threadingly engaging said body at an end opposite said open end, said thumb screw configured to engage an end of said shaft and bias said shaft toward said body open end; whereby said deflectable portion is configured to impart a radially inward force around the enlarged head and said shaft is configured to impart an axial compression force on the enlarged head, thereby locking the elongated fixation member relative to said orthopaedic apparatus.
Claim 3
Dependent Claim
71 words
The orthopaedic apparatus of claim 1, wherein said deflectable portion comprises a plurality of collet fingers disposed at said open end, and further comprising a sleeve disposed about a portion of said body, said sleeve engaged with and movable in a longitudinal direction relative to said body, said sleeve configured to impart a radially inward force to said collet fingers when moved in a longitudinal direction relative to said open end.
Claim 4
Dependent Claim
29 words
The orthopaedic apparatus of claim 2, wherein said sleeve includes interior threads and said body includes exterior threads, said sleeve interior threads being engaged with said body exterior threads.
Claim 5
Dependent Claim
15 words
The orthopaedic apparatus of claim 1, wherein the elongated fixation member comprises a bone screw.
Claim 6
Dependent Claim
16 words
The orthopaedic apparatus of claim 1, wherein said shaft distal end has a hexagonal exterior configuration.
Claim 7
Dependent Claim
18 words
The orthopaedic apparatus of claim 5, wherein said hexagonal exterior configuration is slightly tapered from said distal end.
Claim 8
Dependent Claim
21 words
The orthopaedic apparatus of claim 6, wherein said slightly tapered distal end comprises a taper of approximately between 10° to 15°.
Claim 9
Dependent Claim
51 words
The orthopaedic apparatus of claim 1, wherein said thumb screw includes a central opening, said shaft including a smaller diameter portion which extends through said central opening, said smaller diameter portion allowing said shaft to be manually positioned for alignment and engagement of said shaft distal end with the enlarged head.
Claim 10
Dependent Claim
22 words
The orthopaedic apparatus of claim 1, wherein said body further comprises a turn wheel providing increased rotational leverage for turning said body.
Claim 11
Dependent Claim
177 words
An orthopaedic apparatus for at least one of removing and driving an elongated fixation member having an enlarged head, said orthopaedic apparatus comprising: a hollow, elongated body having an open end for receiving the enlarged head therein, said body further including a plurality of collet fingers disposed at said open end; a sleeve disposed about a portion of said body, said sleeve engaged with and movable in a longitudinal direction relative to said body, said sleeve configured to impart a radially inward force to said collet fingers when moved in a longitudinal direction relative to said open end; a shaft disposed within said body, said shaft having a distal end disposed substantially adjacent to said body open end, said distal end having an exterior configuration adapted to mate with the enlarged head; and means for biasing said shaft toward said body open end, wherein said biasing means comprises a thumb screw threadingly engaging said body at an end opposite said open end, said thumb screw configured to engage an end of said shaft opposite said distal end.
Claim 12
Dependent Claim
177 words
An orthopaedic apparatus for at least one of removing and driving an elongated fixation member having an enlarged head, said orthopaedic apparatus comprising: a hollow, elongated body having an open end for receiving the enlarged head therein, said body further including a plurality of collet fingers disposed at said open end; a sleeve disposed about a portion of said body, said sleeve engaged with and movable in a longitudinal direction relative to said body, said sleeve configured to impart a radially inward force to said collet fingers when moved in a longitudinal direction relative to said open end; a shaft disposed within said body, said shaft having a distal end disposed substantially adjacent to said body open end, said distal end having an exterior configuration adapted to mate with the enlarged head; and means for biasing said shaft toward said body open end, wherein said biasing means comprises a thumb screw threadingly engaging said body at an end opposite said open end, said thumb screw configured to engage an end of said shaft opposite said distal end.
References Cited (Backward Citations)
US2370407A
Cited
US3208450A
Cited
US3334624A
Cited
US3626935A
Cited
US4140111A
Cited
US4188701A
Cited
US4359906A
Cited
US4423721A
Cited
US4263903A
Cited
US4389913A
Cited
US4438769A
Cited
US4531517A
Cited
USD290399S
Cited
US4592346A
Cited
US4903691A
Cited
US4776328A
Cited
US4911154A
Cited
US4995810A
Cited
US4838264A
Cited
US4981481A
Cited
US4901712A
Cited
US4858601A
Cited
US5139499A
Cited
US4963144A
Cited
US5084053A
Cited
USD353001S
Cited
US5354292A
Cited
US5391181A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-07-21 | 2001-01-20 | 2001-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-07-21 | 2005-01-20 | 2005-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-07-21 | 2009-01-20 | 2009-07-22 | $7700.00 | Window Closed / Lapsed |