US3805775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expanding bone connector
Assignee: Individual
•
Filing: 1971-09-16
•
Granted: 1974-04-23
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Expires: 1991-09-16
Abstract
Abstract A connector for fractured bones has a sleeve which can be inserted into a fractured bone so as to bridge the fracture thereof with an expansible leading end portion being located in one bone fragment, an open trailing end portion being located in the other bone fragment, and an intermediate portion extending between the end portions. An expander screw expands the leading end portion, and the intermediate portion is provided over most or all of its length with one or several ribs projecting beyond its circumference so as to prevent it from rotating in the bone.
Inventors
- 👤 A Fischer
- 👤 J Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:33
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/74; A61B17/72; A61B17/7233; A61B17/7258; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2002/30001; A61F2002/30316; A61F2002/30535; A61F2002/30579
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
142 words
As a medical appliance, a connector for fractured bones, comprising a sleeve adapted for insertion into a fractured bone bridging the fracture thereof, and having an expansible leading end portion adapted to be located in one bone fragment, a threaded open trailing end portion adapted to communicate with the exterior of the other bone fragment, and an intermediate portion; expander means for expanding said leading end portion, and including an expander screw threaded through said sleeve, a threaded cap screw connected with said trailing end portion of said sleeve and having a cap screw head exteriorly engaging and bearing upon said other bone fragment; and at least one rotationpreventing rigid rib projecting beyond the outer circumference of said intermediate portion and extending longitudinally of the latter over at least the major part of the distance between said leading and trailing end portion.
Claim 2
Dependent Claim
142 words
As a medical appliance, a connector for fractured bones, comprising a sleeve adapted for insertion into a fractured bone bridging the fracture thereof, and having an expansible leading end portion adapted to be located in one bone fragment, a threaded open trailing end portion adapted to communicate with the exterior of the other bone fragment, and an intermediate portion; expander means for expanding said leading end portion, and including an expander screw threaded through said sleeve, a threaded cap screw connected with said trailing end portion of said sleeve and having a cap screw head exteriorly engaging and bearing upon said other bone fragment; and at least one rotationpreventing rigid rib projecting beyond the outer circumference of said intermediate portion and extending longitudinally of the latter over at least the major part of the distance between said leading and trailing end portion.
Claim 3
Dependent Claim
22 words
An appliance as defined in claim 1, wherein said rib extends over the entire distance between said leading and trailing end portions.
Claim 4
Dependent Claim
37 words
An appliance as defined in claim 1; and further comprising additional ribs similar to said one rib and projecting beyond the circumference of said intermediate portion, all of said ribs being spaced circumferentially of said intermediate portion.
Claim 5
Dependent Claim
16 words
An appliance as defined in claim 3, wherein at least some of said ribs are continuous.
Claim 6
Dependent Claim
20 words
An appliance as defined in claim 1, said trailing end portion having a lesser outer diameter than said intermediate portion.
Claim 7
Dependent Claim
31 words
An appliance as defined in claim 1, said sleeve having an internal threaded, and said expander screw and cap screw both having external threads dimensioned to mesh with said internal thread.
References Cited (Backward Citations)
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US2381050A
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US2490364A
Cited
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Cited
US3678925A
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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) | 1977-04-22 | 1977-10-22 | 1978-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-22 | 1981-10-22 | 1982-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-22 | 1985-10-22 | 1986-04-23 | $7700.00 | Window Closed / Lapsed |