Handling: hand and hoist-line implements – Grapple – Pivoted cam and hook
Patent
1978-02-08
1979-07-31
Cherry, Johnny D.
Handling: hand and hoist-line implements
Grapple
Pivoted cam and hook
294104, 294106, B66C 148
Patent
active
041628047
ABSTRACT:
A lifting clamp for articles such as steel plates has a movable arcuate gripping jaw, a pivotally mounted arcuate cam jaw, an enlarged recessed opening to receive the article to be lifted, a shackle, a linkage connecting the shackle to the gripping jaw and a locking mechanism engageable with the linkage to lock the gripping jaw in either open or closed position. The locking mechanism has a handle located outside of the clamp body, an integral connection between the handle and an interior portion of the locking mechanism and an auxiliary spring biased locking pin for holding the locking mechanism in the closed position.
REFERENCES:
patent: 1369807 (1921-03-01), Hench
patent: 2360602 (1944-10-01), Waldrup
patent: 2370411 (1945-02-01), Monaco
patent: 2446610 (1948-08-01), Renfroe
patent: 2654630 (1953-10-01), Renfroe
patent: 2852300 (1958-09-01), Gardner
Cherry Johnny D.
J. C. Renfroe and Sons, Inc.
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