US3678925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Connector for fractured bones
Assignee: Individual
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Filing: 1970-10-01
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Granted: 1972-07-25
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Expires: 1990-10-01
Abstract
Abstract A sleeve is to be inserted into a fractured bone bridging the fracture thereof. The leading end portion is then to be located in one bone fragment and the open trailing end portion is to communicate with the exterior of the other bone fragment. An expander screw is threaded into the sleeve and has a head which bears exclusively upon an annular shoulder provided on the sleeve. The front end of the expander screw serves, by its configuration or by cooperation with an expander element, for expanding the leading end of the sleeve so as to retain it in the bone fragment in which it is located. A cap screw is threadedly connected with and closes the trailing end portion of the sleeve, bearing upon the other bone fragment and thereby drawing the two fragments together via the intermediary of the sleeve.
Inventors
- 👤 Artur Fischer
- 👤 Jean-Nicolas Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:42
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/74; A61B17/742; A61B17/72; A61B17/7233; A61B17/7258; A61B17/7266
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
144 words
A connector for fractured bones, comprising a sleeve adapted for inserting into a fractured bone bridging the fracture thereof, and having a leading portion adapted to be located in one bone fragment and an open trailing portion adapted to communicate with the exterior of the other bone fragment and provided with an endface and with internal threads inwardly of said endface; expander means for expanding said leading portion, and including an expander screw threaded through said sleeve and having a head portion located in said trailing portion axially bearing upon the same when said screw is rotated in a sense effecting expanding of said leading portion; and a cap screw having a stem threaded into said trailing portion of said sleeve and a cap screw hEad adapted to exteriorly engage and bear upon said other bone fragment, the threads of said screws being identical.
Claim 2
Dependent Claim
144 words
A connector for fractured bones, comprising a sleeve adapted for inserting into a fractured bone bridging the fracture thereof, and having a leading portion adapted to be located in one bone fragment and an open trailing portion adapted to communicate with the exterior of the other bone fragment and provided with an endface and with internal threads inwardly of said endface; expander means for expanding said leading portion, and including an expander screw threaded through said sleeve and having a head portion located in said trailing portion axially bearing upon the same when said screw is rotated in a sense effecting expanding of said leading portion; and a cap screw having a stem threaded into said trailing portion of said sleeve and a cap screw hEad adapted to exteriorly engage and bear upon said other bone fragment, the threads of said screws being identical.
Claim 3
Dependent Claim
41 words
A connector as defined in claim 1, said sleeve having an inner annular shoulder in said trailing portion, and said head engaging and axially bearing upon said inner annular shoulder when said expander screw is rotated for expanding said leading portion.
Claim 4
Dependent Claim
22 words
A connector as defined in claim 1, wherein said sleeve, expander means and cap screw consist of rustfree steel and acid-resistant steel.
Claim 5
Dependent Claim
24 words
A connector as defined in claim 1, said sleeve having a radially inwardly extending flange at the leading open of said leading end portion.
Claim 6
Dependent Claim
46 words
A connector as defined in claim 1, said expander means including an expander element, and cooperating engaging means on said element and said expander screw for drawing the former into said sleeve in a sense expanding the same in response to rotation of said expander screw.
Claim 7
Dependent Claim
48 words
A connector as defined in claim 1, said expander means comprising an expander member, and an expander pin portion on said screw operative for expanding said expander member in response to advancement of said expander pin portion longitudinally of said sleeve due to rotation of said expander screw.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |