Patent US6733502B2 successfully refreshed from Google Patents.
US6733502B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable locking spinal screw having a knurled collar
Assignee: HighRidge Medical LLC
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Filing: 2002-05-15
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Granted: 2004-05-11
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Expires: 2022-05-15
Abstract
Abstract The invention provides a bone screw for use in an implant assembly having a member including a hole through which the screw extends. The member preferably includes a socket in an anchor that receives a rounded bottom portion of the screw head in order to form a ball and socket connection. The screw has a necked area below the rounded bottom portion which projects through the hole and below that on the longitudinal axis of the screw. The screw includes a knurled collar that is sized so as to allow the anchor to be inserted onto the screw but which subsequently restrains the anchor from falling downward onto the threaded area of the screw.
Inventors
- 👤 Moti Altarac
- 👤 Philip M. Mellinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:09
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/70; A61B17/7001; A61B17/7035; A61B17/7037; A61B17/7032; A61B2017/0042; A61B2017/00429; A61B2017/00433
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
94 words
An orthopedic implant comprising a bone screw and a member having a through hole which receives the bone screw, the bone screw including threads and a head that is captured in one side of the through hole in the through direction, the head being joined by a necked portion to the rest of the screw, and the screw including a collar which acts as a restraining means for the member having the through hole and is which is located adjacent the necked portion on the opposite side of the through hole from the head.
Claim 2
Dependent Claim
94 words
An orthopedic implant comprising a bone screw and a member having a through hole which receives the bone screw, the bone screw including threads and a head that is captured in one side of the through hole in the through direction, the head being joined by a necked portion to the rest of the screw, and the screw including a collar which acts as a restraining means for the member having the through hole and is which is located adjacent the necked portion on the opposite side of the through hole from the head.
Claim 3
Dependent Claim
53 words
An orthopedic implant as set forth in claim 1 wherein the through hole is circular and has a first diameter, and wherein the collar is annular and has a second diameter and the collar includes teeth having a depth that is about twice the difference between the second diameter and the first diameter.
Claim 4
Dependent Claim
21 words
An orthopedic implant as set forth in claim 2 further including a stabilizer and wherein the member is a stabilizer anchor.
Claim 5
Dependent Claim
43 words
An orthopedic implant as set forth in claim 3 wherein the stabilizer is a rod, and the stabilizer anchor includes a rod channel which holds the rod in a direction transverse to a plane defined by the circular hole of the stabilizer anchor.
Claim 6
Dependent Claim
24 words
An orthopedic implant as set forth in claim 4 wherein the stabilizer anchor further includes means to lock the rod in the rod channel.
Claim 7
Dependent Claim
32 words
An orthopedic implant as set forth in claim 5 wherein the means to lock the rod in the rod channel is a compression member which is compressed downward on the stabilizer anchor.
Claim 8
Dependent Claim
23 words
An orthopedic implant as set forth in claim 6 wherein the compression member has threads that cooperate with threads on the stabilizer anchor.
Claim 9
Dependent Claim
28 words
An orthopedic implant as set forth in claim 7 wherein the compression member is a nut having internal threads that cooperate with external threads on the stabilizer anchor.
Claim 10
Dependent Claim
35 words
An orthopedic implant as set forth in claim 1 wherein the screw head has a bottom portion with an outwardly rounded profile and the member includes an inwardly rounded socket that receives the screw head.
Claim 11
Dependent Claim
31 words
An orthopedic implant as set forth in claim 9 wherein the screw head includes a top portion including a torque driving area and a rounded portion that interfaces with a stabilizer.
Claim 12
Dependent Claim
34 words
An orthopedic implant as set forth in claim 9 wherein at least a portion of the bottom portion of the screw head or of the inside of the socket includes a high friction surface.
Claim 13
Dependent Claim
152 words
A spinal implant assembly comprising a rod, a rod anchor and a screw wherein the rod anchor includes a screw socket with a terminal annular opening having a first diameter and transverse to the long axis of the socket, the rod anchor has a rod receiving channel; and the screw includes a head having a bottom portion that is outwardly rounded and which cooperates with the screw socket and the head includes a necked area that extends through the terminal annular opening to allow the anchor to be positioned at a variable angle relative to the longitudinal axis of the screw on the screw and the screw further includes annular restraining means below the necked portion having a diameter and external configuration so as to allow the screw to be inserted through the annular opening of the rod anchor but which inhibits the anchor from being longitudinally displaced below the restraining means.
Claim 14
Dependent Claim
152 words
A spinal implant assembly comprising a rod, a rod anchor and a screw wherein the rod anchor includes a screw socket with a terminal annular opening having a first diameter and transverse to the long axis of the socket, the rod anchor has a rod receiving channel; and the screw includes a head having a bottom portion that is outwardly rounded and which cooperates with the screw socket and the head includes a necked area that extends through the terminal annular opening to allow the anchor to be positioned at a variable angle relative to the longitudinal axis of the screw on the screw and the screw further includes annular restraining means below the necked portion having a diameter and external configuration so as to allow the screw to be inserted through the annular opening of the rod anchor but which inhibits the anchor from being longitudinally displaced below the restraining means.
Claim 15
Dependent Claim
18 words
A spinal implant assembly as set forth in claim 12 wherein the restraining means is a knurled collar.
Claim 16
Dependent Claim
38 words
A spinal implant assembly as set forth in claim 13 wherein the rod anchor further includes threaded compression means which locks the rod in position in the channel and the angle of the anchor relative to the screw.
Claim 17
Dependent Claim
28 words
A spinal implant assembly as set forth in claim 14 wherein the bottom portion of the screw and the inner portion of the socket include high friction surfaces.
Claim 18
Dependent Claim
16 words
A spinal implant as set forth in claim 15 wherein the high friction surfaces are knurled.
References Cited (Backward Citations)
US4653481A
Cited
US5098432A
Cited
US4805602A
Cited
US4913134A
Cited
US5005562A
Cited
US5207678A
Cited
US5624442A
Cited
US5474555A
Cited
US5190543A
Cited
US5176678A
Cited
US5480401A
Cited
US5738685A
Cited
US5466237A
Cited
US5562661A
Cited
US5743669A
Cited
US6565567B1
Cited
US6267765B1
Cited
US6302883B1
Cited
US6554831B1
Cited
US20030069580A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2007-05-11 | 2007-11-10 | 2008-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-05-11 | 2011-11-10 | 2012-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-05-11 | 2015-11-10 | 2016-05-11 | $7700.00 | Window Closed / Lapsed |