US5743914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bone screw
Assignee: Orthopaedic Biosystems Ltd Inc
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Filing: 1996-06-06
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Granted: 1998-04-28
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Expires: 2016-06-06
Abstract
Abstract A bone screw having a head with a socket for receiving a screw driving device and a shaft extending from the head. The shaft includes respective alternating first and second helical threads running substantially parallel with each other along the shaft. Additionally, the second series of helical threads exhibits a diameter substantially different than the first series of helical threads. In accordance with this aspect of the invention, the thread pattern of the bone screw exhibits a hi-low thread configuration. In addition, the bone screw may comprise a plurality of series of helical threads, each exhibiting different diameters from the others.
Inventors
- 👤 Jeffry B. Skiba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:28
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/84; A61B17/86; A61B17/8625; A61B17/8605; A61B17/861; A61B17/863; A61B17/8635; A61B17/864; A61B2017/00004
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
92 words
A bone screw, comprising: a head for receiving a screw driving device; and a shaft having a length and extending from said head, said shaft including a first series of helical threads having a first diameter and a first pitch, and a second series of helical threads interleaved with said first series of helical threads and having a second diameter and a second pitch; wherein said second diameter is substantially different than said first diameter and at least one of said first and second pitches changes along the length of said shaft.
Claim 2
Dependent Claim
92 words
A bone screw, comprising: a head for receiving a screw driving device; and a shaft having a length and extending from said head, said shaft including a first series of helical threads having a first diameter and a first pitch, and a second series of helical threads interleaved with said first series of helical threads and having a second diameter and a second pitch; wherein said second diameter is substantially different than said first diameter and at least one of said first and second pitches changes along the length of said shaft.
Claim 3
Dependent Claim
18 words
The bone screw of claim 1 wherein said head includes a socket for engagement by a driving tool.
Claim 4
Dependent Claim
13 words
The bone screw of claim 2 wherein the socket exhibits a hexagon configuration.
Claim 5
Dependent Claim
16 words
The bone screw of claim 1 wherein said head is configured as a conventional hexagon head.
Claim 6
Dependent Claim
16 words
The bone screw of claim 1 wherein said head is configured as a square shaped head.
Claim 7
Dependent Claim
22 words
The bone screw of claim 1 wherein only a portion of said shaft includes said first and said second series of threads.
Claim 8
Dependent Claim
22 words
The bone screw of claim 6 wherein a length of the screw is in the range of 0.25 to 8 inches long.
Claim 9
Dependent Claim
29 words
The bone screw of claim 1 wherein the shaft further includes a tip distal from the head, the tip being configured for self-tapping the bone screw into the bones.
Claim 10
Dependent Claim
29 words
The bone screw of claim 1 wherein the shaft further includes a tip distal from the head, the tip being configured for self-drilling the bone screw into the bones.
Claim 11
Dependent Claim
33 words
The bone screw of claim 1 further comprising an axial guide wire bore extending along the length of said screw, such that the guide wire may be journaled through said guide wire bore.
Claim 12
Dependent Claim
22 words
The bone screw of claim 1 wherein the first pitch and the second pitch each change along the length of said shaft.
Claim 13
Dependent Claim
21 words
The bone screw of claim 1 wherein a diameter of the shaft is in the range of 0.060 to 0.190 inches.
Claim 14
Dependent Claim
25 words
The bone screw of claim 12 wherein a diameter of the first series of helical threads is in the range of 0.100 to 0.300 inches.
Claim 15
Dependent Claim
25 words
The bone screw of claim 13 wherein a diameter of the second series of helical threads is in the range of 0.080 to 0.275 inches.
Claim 16
Dependent Claim
38 words
The bone screw of claim 1 wherein said screw is made of a material selected from the group consisting of titanium alloy, stainless steel, titanium stainless, class six implant grade plastic, polylactic acid, polyoxalic acid, or polyglycolic acid.
Claim 17
Dependent Claim
77 words
A bone screw, comprising: a head for receiving a screw driving device; and a shaft having a length and extending from said head, said shaft including at least two series of interleaved helical threads, each of said series of helical threads having a pitch and having a substantially different diameter than each other of said series of helical threads; wherein at least one of said series of helical threads changes pitch along the length of said shaft.
Claim 18
Dependent Claim
77 words
A bone screw, comprising: a head for receiving a screw driving device; and a shaft having a length and extending from said head, said shaft including at least two series of interleaved helical threads, each of said series of helical threads having a pitch and having a substantially different diameter than each other of said series of helical threads; wherein at least one of said series of helical threads changes pitch along the length of said shaft.
Claim 19
Dependent Claim
129 words
A bone screw, comprising: A shaft having a first end, a second end, and a length therebetween, said first end of said shaft being configured to accept a driving device and said second end of said shaft including a first series of helical threads having a first diameter and a first pitch, and at least one second series of helical threads having a second diameter and a second pitch, wherein said second diameter is substantially different than said first diameter and at least one of said first and second pitches changes along the length of said shaft, and wherein said at least one second series of helical threads extend at least part of the way from said first end of said shaft to said second end of said shaft.
Claim 20
Dependent Claim
129 words
A bone screw, comprising: A shaft having a first end, a second end, and a length therebetween, said first end of said shaft being configured to accept a driving device and said second end of said shaft including a first series of helical threads having a first diameter and a first pitch, and at least one second series of helical threads having a second diameter and a second pitch, wherein said second diameter is substantially different than said first diameter and at least one of said first and second pitches changes along the length of said shaft, and wherein said at least one second series of helical threads extend at least part of the way from said first end of said shaft to said second end of said shaft.
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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) | 2001-04-27 | 2001-10-27 | 2002-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-04-27 | 2005-10-27 | 2006-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-04-27 | 2009-10-27 | 2010-04-28 | $7700.00 | Window Closed / Lapsed |