Patent US4931055A successfully refreshed from Google Patents.
US4931055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distraction rods
Assignee: Individual
•
Filing: 1987-06-01
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Granted: 1990-06-05
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Expires: 2007-06-01
Abstract
Abstract Distraction rods for use in the treatment of curvature of the spine and comprising an elongated member having a threaded, axial bore therein and an elongated housing into which the elongated member is slidably fitted, the elongated housing having located at one end a connection means for fitting to a clamp for connection to the vertebra, and wherein at the other end of the elongated housing a second connection means for fitting to another clamp for connection to the vertebra is located on one end of the elongated member, said elongated housing having a threaded rod which fits within the bore of the elongated member and engages the threaded bore therein such that the elongated member can move longitudinally along the threaded rod, and hence longitudinally with respect to the elongated housing.
Inventors
- 👤 John Bumpus
- 👤 Trevor Woodbridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:55
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/70; A61B17/7001; A61B17/7002; A61B17/7014; A61B17/80; A61B17/8004; A61B17/7004; Y; Y10; Y10S; Y10S606/00; Y10S606/907
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
126 words
A distraction rod comprising an elongated member having a threaded, axial bore therein and an elongated housing into which the elongated member is slidably fitted, the elongated housing having located at one end a connection means for fitting to a clamp for connection to the vertebra, and wherein at the other end of the elongated housing a second connection means for fitting to another clamp for connection to the vertebra is located on one end of the elongated member, said elongated housing having operating means which comprises a threaded rod which fits within the bore of the elongated member and engages the threaded bore therein such that the elongated member can move longitudinally along the threaded rod, and hence longitudinally with respect to said elongated housing.
Claim 2
Dependent Claim
126 words
A distraction rod comprising an elongated member having a threaded, axial bore therein and an elongated housing into which the elongated member is slidably fitted, the elongated housing having located at one end a connection means for fitting to a clamp for connection to the vertebra, and wherein at the other end of the elongated housing a second connection means for fitting to another clamp for connection to the vertebra is located on one end of the elongated member, said elongated housing having operating means which comprises a threaded rod which fits within the bore of the elongated member and engages the threaded bore therein such that the elongated member can move longitudinally along the threaded rod, and hence longitudinally with respect to said elongated housing.
Claim 3
Dependent Claim
73 words
A distraction rod according to claim 1 wherein the elongated housing is closed at one end and open at the other end and wherein the threaded rod has one end which engages the threads of the axial bore within the elongated member and another end which bears against the closed end of the elongated housing and wherein the operating means further comprises means for rotating the threaded rod relative to the elongated member.
Claim 4
Dependent Claim
16 words
A distraction rod according to claim 1 wherein said operating means comprises a right angle drive.
Claim 5
Dependent Claim
34 words
A distraction rod according to claim 3 wherein said right angle drive comprises a bevel gear operable externally of the housing which meshes with a bevel gear on one end of the threaded rod.
Claim 6
Dependent Claim
18 words
A distraction rod according to claim 4 wherein said right angle drive is operated by an allen wrench.
References Cited (Backward Citations)
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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) | 1993-06-04 | 1993-12-04 | 1994-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-04 | 1997-12-04 | 1998-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-04 | 2001-12-04 | 2002-06-05 | $7700.00 | Window Closed / Lapsed |