US3879814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clamp
Assignee: Mo Clamp Co Ltd
•
Filing: 1974-02-25
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Granted: 1975-04-29
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Expires: 1994-02-25
Abstract
Abstract A clamp having a pair of elongated, crossed clamping parts crossed on a pivotal axis for swinging movement above said axis and rocking movement about a transverse axis. The parts have camming members on lever portions thereof which co-act and spread the lever portions and move clamping jaws into engagement when the parts are swung about the pivotal axis from an angularly disposed position to a position of substantial parallelism.
Inventors
- 👤 William Mojelski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:24
CPC Classifications
F; F16; F16B; F16B2/00; F16B2/02; F16B2/06; F16B2/10; Y; Y10; Y10S; Y10S72/00; Y10S72/705; Y10T; Y10T24/00; Y10T24/44; Y10T24/44291; Y10T24/44368; Y10T24/44496; Y10T24/44504
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
141 words
A clamp comprising: a. a pair of elongated clamping parts disposed in crossed relationship on a pivotal axis, b. each of the clamping parts having, at one end, clamping jaws presenting parallel, planar clamping faces normal to the pivotal axis and, at an opposite end, elongated lever portions, c. connecting means connecting the clamping parts at the pivotal axis for pivotal movement about said axis between a position of angularity and a position of substantial parallelism and for rocking movement about a transverse axis, d. projections extending from inner surfaces of the clamping parts, the projections having sloped camming faces adapted for mutual camming engagement when the parts are swung from the position of angularity to a position of substantial parallelism, for spreading the lever portions apart so as to move the clamping jaws into gripping engageMent with a work piece.
Claim 2
Dependent Claim
141 words
A clamp comprising: a. a pair of elongated clamping parts disposed in crossed relationship on a pivotal axis, b. each of the clamping parts having, at one end, clamping jaws presenting parallel, planar clamping faces normal to the pivotal axis and, at an opposite end, elongated lever portions, c. connecting means connecting the clamping parts at the pivotal axis for pivotal movement about said axis between a position of angularity and a position of substantial parallelism and for rocking movement about a transverse axis, d. projections extending from inner surfaces of the clamping parts, the projections having sloped camming faces adapted for mutual camming engagement when the parts are swung from the position of angularity to a position of substantial parallelism, for spreading the lever portions apart so as to move the clamping jaws into gripping engageMent with a work piece.
Claim 3
Dependent Claim
70 words
A clamp as claimed in claim 1 in which the clamping parts have openings on the pivotal axis and in which the connecting means comprises a bolt having a shank having a loose fit through the openings and having a head on one end bearing against one of the clamping parts and a nut threaded on an opposite end adapted to be tightened against the other of the clamping parts.
Claim 4
Dependent Claim
34 words
A clamp as claimed in claim 1 in which the lever portions terminate in lateral extensions, and including a clevis swingably connected to each lateral extension for connection to a link of a chain.
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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |