US3929367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for locking a gripping member of a pair of gripping tongs against rotation
Assignee: Gustavsbergs Fabriker AB
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Filing: 1975-03-04
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Granted: 1975-12-30
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Expires: 1995-03-04
Abstract
Abstract The invention concerns an improvement of the means for locking the gripping member of a pair of gripping tongs against rotation described in the U.S. Pat. No. 3,576,343, said improvement consisting in that the chuck, into which the gripping member is drawn for closing the jaws of the tongs around the object to be seized, is axially displaceable on a pin projecting forwards from a locking member, the end faces of the chuck and of the locking member facing each other being provided with axially projecting coupling teeth to produce a claw coupling engagement between the coupling member and the chuck when the gripping members are drawn into the chuck. A resilient member between the pin, on which the chuck is displaceable, and a flange in the chuck is provided for returning the claw coupling to the disengaged position when the operating mechanism of the gripping member is released.
Inventors
- 👤 Per Olof Bjurling
- 👤 Sven-Eric Juhlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:57
CPC Classifications
B; B25; B25J; B25J15/00; B66; B66C; B66C1/00; B66C1/10; B66C1/42; B66C1/44
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
221 words
In means for locking a gripping member of a pair of gripping tongs against rotation, wherein the jaws of the tongs are moved towards each other for gripping an object by drawing the gripping member into a conical chuck by means of the operating mechanism of the tongs, a locking member (2) integrated with the gripping tongs being caused to engage a locking hub (4) that is axially displaceable by the gripping member (1), the improvement according to which the gripping member (1) and the chuck (3) are provided with cooperating guiding means (10, 11) adapted to keep the gripping member and the chuck secured against relative rotation during axial displacement into the chuck, said axially displaceable locking hub (4) being integrated with said chuck (3) and provided with coupling members (6) for axially engaging coupling members (7) of the locking member (2), said hub being axially displaceable on a forward projection (8) of said locking member (2) before engagement of the coupling members (6) and (7), said hub being brought into engagement with the locking member (2) during the initial portion of the axial displacement of the gripping member (1) into said chuck (3) whereby continued displacement of the gripping member into the chuck proceeds without any possibility of rotation in relation to the other portion of the gripping tongs.
Claim 2
Dependent Claim
221 words
In means for locking a gripping member of a pair of gripping tongs against rotation, wherein the jaws of the tongs are moved towards each other for gripping an object by drawing the gripping member into a conical chuck by means of the operating mechanism of the tongs, a locking member (2) integrated with the gripping tongs being caused to engage a locking hub (4) that is axially displaceable by the gripping member (1), the improvement according to which the gripping member (1) and the chuck (3) are provided with cooperating guiding means (10, 11) adapted to keep the gripping member and the chuck secured against relative rotation during axial displacement into the chuck, said axially displaceable locking hub (4) being integrated with said chuck (3) and provided with coupling members (6) for axially engaging coupling members (7) of the locking member (2), said hub being axially displaceable on a forward projection (8) of said locking member (2) before engagement of the coupling members (6) and (7), said hub being brought into engagement with the locking member (2) during the initial portion of the axial displacement of the gripping member (1) into said chuck (3) whereby continued displacement of the gripping member into the chuck proceeds without any possibility of rotation in relation to the other portion of the gripping tongs.
Claim 3
Dependent Claim
33 words
Locking means according to claim 1, in which a resilient member (9) is inserted between locking member (2) and cooperating locking hub (4), said resilient member tending to keep the locking members disengaged.
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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |