US4790304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-locking pin device particularly useful for internally fixing bone fractures
Assignee: Individual
•
Filing: 1985-01-10
•
Granted: 1988-12-13
•
Expires: 2005-01-10
Abstract
Abstract A self-locking pin device comprises a pin formed with enlargement in the region of its distal end; a tube received over the pin and having a diameter smaller than the enlargement, the tube being axially split at both its distal and proximal ends; and a collar received between the proximal ends of the pin and tube such that moving either the pin or tube splays the distal end of the tube about its axial split, and moving either the collar or the tube splays the proximal end of the tube along its axial split.
Inventors
- 👤 Lior Rosenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:32
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/72; A61B17/7291; A61B17/7233; A61B17/7258; A61B17/7266
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
153 words
A self-locking pin device comprising: a pin having proximal and distal ends and formed with an enlargement in the region of its distal end; a tube received over said pin and having a diameter smaller than said enlargement, said tube being axially split at both its distal and proximal ends; a collar received between the proximal ends of said pin and tube, such that affecting relative axial movement between the enlargement at the distal end of the pin and the distal end of the tube splays outwardly the distal end of the tube about its axial split, and effecting relative axial movement between the collar and the proximal end of the tube splays outwardly the proximal end of the tube along its axial split; and manually gripping means attachable to the proximal end of the pin, tube and collar, to facilitate their insertion and the splaying of the two ends of the tube.
Claim 2
Dependent Claim
153 words
A self-locking pin device comprising: a pin having proximal and distal ends and formed with an enlargement in the region of its distal end; a tube received over said pin and having a diameter smaller than said enlargement, said tube being axially split at both its distal and proximal ends; a collar received between the proximal ends of said pin and tube, such that affecting relative axial movement between the enlargement at the distal end of the pin and the distal end of the tube splays outwardly the distal end of the tube about its axial split, and effecting relative axial movement between the collar and the proximal end of the tube splays outwardly the proximal end of the tube along its axial split; and manually gripping means attachable to the proximal end of the pin, tube and collar, to facilitate their insertion and the splaying of the two ends of the tube.
Claim 3
Dependent Claim
26 words
The device according to claim 1, wherein said distal end of a pin is formed with a cutting edge to facilitate inserting the pin by rotation.
Claim 4
Dependent Claim
15 words
The device according to claim 1, wherein the distal edge of the collar is tapered.
Claim 5
Dependent Claim
18 words
The device according to claim 1, wherein said enlargement is formed at the distal end of the pin.
Claim 6
Dependent Claim
18 words
The device according to claim 1, wherein said pin is of a diameter of 0.5 to 1.5 mm.
Claim 7
Dependent Claim
13 words
The device according to claim 1, wherein said pin is of stainles steel.
Claim 8
Dependent Claim
16 words
The device according to claim 6, wherein said tube and collar are also of stainless steel.
Claim 9
Dependent Claim
98 words
The device according to claim 1, wherein said manually gripping means comprises: a sleeve formed with an axial bore for receiving the proximal end of the pin, and with an annular recess extending axially of its distal end for receiving the proximal end of the tube; and a locking ring movable either to a locking position at the distal end of said sleeeve, wherein it cams same inwardly to cause it to grip said pin and tube, or to a releasing position away from said distal end of the sleeve causing same to release said pin and tube.
Claim 10
Dependent Claim
41 words
The device according to claim 8, wherein the distal end of said sleeve is formed with a tapered outer face increasing in diameter towards its distal end, which tapered outer face receives said locking ring when moved to its locking position.
Claim 11
Dependent Claim
39 words
The device according to claim 9, wherein said tapered outer face of the sleeve terminates in an annular rib at its distal end, which rib serves as a limit for the locking ring when moved to its locking position.
Claim 12
Dependent Claim
39 words
The device according to claim 8, wherein said manually gripping means further comprises: a cap received over the proximal end of the sleeve and retaining said locking means in its locking position over the distal end of said sleeve.
Claim 13
Dependent Claim
26 words
The device according to claim 11, wherein the proximal end of said sleeve is formed with external thread mating with internal threads formed in said cap.
Claim 14
Dependent Claim
22 words
The device according to claim 12, wherein said cap is formed with a central bore receiving the proximal end of said pin.
Claim 15
Dependent Claim
51 words
The device according to claim 13, wherein the proximal end of said pin passes through said central bore of the cap, the device further including: a retainer clip for retaining the cap on the proximal end of the pin while permitting the cap to be rotated with respect to the pin.
Claim 16
Dependent Claim
33 words
The device according to claim 13, wherein said cap is formed at its proximal end with an enlarged head serving as a limit for the locking ring when moved to its releasing position.
Claim 17
Dependent Claim
41 words
The device according to claim 15, wherein said cap is further formed at its proximal end with an annular recess for receiving an annular rib formed on the inner face of said locking ring for retaining same in its releasing position.
Claim 18
Dependent Claim
21 words
The device according to claim 8, wherein said collar is formed as a separate member from, and engageable with, said sleeve.
Claim 19
Dependent Claim
15 words
The device according to claim 8, wherein said collar is integrally formed with said sleeve.
Claim 20
Dependent Claim
18 words
The device according to claim 8, wherein said cap is formed as a separate member from said pin.
Claim 21
Dependent Claim
19 words
The device according to claim 8, wherein said cap is fixedly connected to the proximal end of said pin.
Claim 22
Dependent Claim
41 words
The device according to claim 8, wherein the proximal end of said pin is formed with means for rotating same, and said collar includes protuberances formed on its outer face movable within the slits in the proximal end of said tube.
Claim 23
Dependent Claim
148 words
A self-locking pin device comprising: a pin having proximal and distal ends and formed with an enlargement in the region of its distal end; a tube received over said pin and having a diameter smaller than said enlargement, said tube being axially split at both its distal and proximal ends; and a collar received between the proximal ends of said pin and tube, such that effecting relative axial movement between the enlargement at the distal end of the pin and the distal end of the tube splays outwardly the distal end of the tube about its axial split, and effecting relative axial movement between the collar and the proximal end of the tube splays outwardly the proximal end of the tube along its axial split; said enlargement being formed inwardly of the distal end of the pin to provide an extension for effecting external fixation to the pin.
Claim 24
Dependent Claim
148 words
A self-locking pin device comprising: a pin having proximal and distal ends and formed with an enlargement in the region of its distal end; a tube received over said pin and having a diameter smaller than said enlargement, said tube being axially split at both its distal and proximal ends; and a collar received between the proximal ends of said pin and tube, such that effecting relative axial movement between the enlargement at the distal end of the pin and the distal end of the tube splays outwardly the distal end of the tube about its axial split, and effecting relative axial movement between the collar and the proximal end of the tube splays outwardly the proximal end of the tube along its axial split; said enlargement being formed inwardly of the distal end of the pin to provide an extension for effecting external fixation to the pin.
References Cited (Backward Citations)
DE471336C
Cited
US1060543A
Cited
US3208450A
Cited
US3312139A
Cited
US3438686A
Cited
US4227518A
Cited
US4262665A
Cited
US4522202A
Cited
US4562598A
Cited
US4483335A
Cited
US4481702A
Cited
US4681477A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-12-13 | 1992-06-13 | 1992-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-13 | 1996-06-13 | 1996-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-13 | 2000-06-13 | 2000-12-13 | $7700.00 | Window Closed / Lapsed |