US5154718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spinal coupler assembly
Assignee: Zimmer Technology Inc
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Filing: 1992-05-14
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Granted: 1992-10-13
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Expires: 2012-05-14
Abstract
Abstract The present invention relates to a coupler assembly for use in a posterior spinal system including components designed to be affixed to the spinal column of a person to correct various lateral and sagittal deformities. The spinal coupler assembly is adapted to be interconnected between two spaced rods. The couplers are used in conjunction with the spinal system which also includes a pair of smooth surfaced rods mounted in spaced relation to one another on the spinal column in conjunction with various fixation devices such as clamps with hook bodies, hooks, screws with hook bodies and the couplers. Each such fixation device utilizes locking sleeve assemblies at each connection point to secure the respective fixation device to the respective rod or rods. The coupler assemblies are provided to maintain the spacing of the rods. The method of performing surgery using the posterior spinal system is also disclosed.
Inventors
- 👤 Trent E. Cozad
- 👤 Antony J. Lozier
- 👤 Jerry L. Lower
- 👤 Allan F. Tencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:57
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/70; A61B17/7049; A61B17/7052; A61B17/7001; A61B17/7002; A61B17/7004; A61B17/7008; A61B17/7047; A61B17/7032
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
240 words
A spinal coupler assembly including a spinal coupler and two noncolinear spaced rods, wherein the spinal coupler is adapted to be interconnected between the two spaced rods, the spinal coupler comprising: a) a first body having a first head and a first shaft connected thereto, said first shaft having one of left-hand and right-hand threads thereon; b) a second body having a second head and a second shaft connected thereto said second shaft having the other of left-hand threads and right-hand threads thereon; c) a sleeve having a bore therethrough, said bore having left-hand threads on one end thereof and right-hand threads on the other end thereof; said bore being sized to be threadable over said shafts; d) one of said left-hand of right-hand threads in said bore being provided in a narrow band, a corresponding one of said left-hand or right-hand threads on said first or second shaft being provided in a narrow ring spaced from said first or second head by a distance at least as wide as said narrow band defining a smooth neck, whereby said narrow band may be threaded past said narrow ring to a position wherein said band and ring are disengaged and said band overlies said smooth neck so that said sleeve may be rotated to adjust the linear position of that body devoid of said narrow ring while that body with said narrow ring does not reciprocate with respect to said sleeve.
Claim 2
Dependent Claim
240 words
A spinal coupler assembly including a spinal coupler and two noncolinear spaced rods, wherein the spinal coupler is adapted to be interconnected between the two spaced rods, the spinal coupler comprising: a) a first body having a first head and a first shaft connected thereto, said first shaft having one of left-hand and right-hand threads thereon; b) a second body having a second head and a second shaft connected thereto said second shaft having the other of left-hand threads and right-hand threads thereon; c) a sleeve having a bore therethrough, said bore having left-hand threads on one end thereof and right-hand threads on the other end thereof; said bore being sized to be threadable over said shafts; d) one of said left-hand of right-hand threads in said bore being provided in a narrow band, a corresponding one of said left-hand or right-hand threads on said first or second shaft being provided in a narrow ring spaced from said first or second head by a distance at least as wide as said narrow band defining a smooth neck, whereby said narrow band may be threaded past said narrow ring to a position wherein said band and ring are disengaged and said band overlies said smooth neck so that said sleeve may be rotated to adjust the linear position of that body devoid of said narrow ring while that body with said narrow ring does not reciprocate with respect to said sleeve.
Claim 3
Dependent Claim
74 words
The invention of claim 1, wherein each said head includes a passage therethrough adapted to receive one of said rods therein and locking means interposable between each said passage and a respective said rod to lock each said body to a said respective rod, and wherein the bore of the sleeve has an axis, and wherein the passage of each head has an axis which is substantially perpendicular to the axis of the bore.
Claim 4
Dependent Claim
11 words
The invention of claim 2, wherein each said passage is tapered.
Claim 5
Dependent Claim
13 words
The invention of claim 2, wherein each said passage has an open back.
Claim 6
Dependent Claim
75 words
The invention of claim 2, wherein each said locking means comprises a locking sleeve with a tapered portion adapted to be inserted into a said passage, a lock nut threadable over a threaded surface of said locking sleeve, said lock nut interacting with said head to cause an interference frictional interconnection between said head and said locking sleeve on the one hand and between said locking sleeve and a said rod on the other hand.
Claim 7
Dependent Claim
42 words
The invention of claim 1, wherein said first shaft has a blind bore therein, said second shaft having an end sized to be slidably received in said blind bore when said sleeve is mounted over said shafts to guide said shafts therein.
Claim 8
Dependent Claim
16 words
The invention of claim 1, wherein said sleeve has an outer surface with gripping flats thereon.
Claim 9
Dependent Claim
68 words
The invention of claim 3, wherein each said locking means comprises a locking sleeve with a tapered portion adapted to be inserted into a said passage, a lock nut securable in direct contact over a portion of said locking sleeve, said lock nut interacting with said head to secure an interference frictional interconnection between said head and said locking sleeve and between said locking sleeve and said rod.
Claim 10
Dependent Claim
34 words
The invention of claim 1 wherein the other of said left-hand or right-hand threads on said first or second shaft is provided along a majority of the length of said first or second shaft.
Claim 11
Dependent Claim
14 words
The invention of claim 1 wherein the first and second heads are enlarged heads.
References Cited (Backward Citations)
US731635A
Cited
US953896A
Cited
US1085461A
Cited
US1448953A
Cited
US2238870A
Cited
US3239930A
Cited
GB1334867A
Cited
FR2151475A5
Cited
US3806265A
Cited
US3809074A
Cited
FR2244446A1
Cited
US4114241A
Cited
US4199070A
Cited
US4202644A
Cited
US4198174A
Cited
US4274401A
Cited
US4361141A
Cited
US4409968A
Cited
US4411259A
Cited
US4369769A
Cited
US4433676A
Cited
US4404967A
Cited
US4567884A
Cited
US4815453A
Cited
US4641636A
Cited
US4629178A
Cited
US4611582A
Cited
US4827918A
Cited
US4773402A
Cited
US4719905A
Cited
US4719905B1
Cited
EP0242708A2
Cited
US5007909A
Cited
US4854304A
Cited
GB2208476A
Cited
US4836196A
Cited
US5010879A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-10-13 | 1996-04-13 | 1996-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-13 | 2000-04-13 | 2000-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-13 | 2004-04-13 | 2004-10-13 | $7700.00 | Window Closed / Lapsed |