Handling: hand and hoist-line implements – Hook – hoistline – or grab type – Locking device
Patent
1975-03-27
1977-03-22
Cherry, Johnny D.
Handling: hand and hoist-line implements
Hook, hoistline, or grab type
Locking device
24241P, B66C 136
Patent
active
040133141
ABSTRACT:
A lifting hook with a generally J-shaped body carries a spring-loaded safety catch which is swingable between an operating position across the hook mouth and a retracted position alongside the longer leg of the "J." In its operating position the catch is arrested by an abutment coming to rest against this longer leg, leaving a gap between the extended catch and the free end of the shorter leg of the J. The shorter leg progressively increases in width, from the bight of the J to its tip, and substantially parallels a pair of lateral ribs on the longer leg which lie close to the catch in its retracted position. In one embodiment, an eye-forming rim at the top of the hook has two lateral projections overhanging the pivot of the catch, the width of the hook body at the free end of its shorter leg substantially equaling its width at the projections and at the ribs. In another embodiment, the retracted catch comes to rest in a longitudinal depression formed on the longer leg by a boss above its pivot and a shoulder below its pivot, that boss being spaced from the widened tip by a distance equal to or only slightly greater than the clearance existing between this tip and the retracted catch.
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Cherry Johnny D.
Dubno Herbert
Ross Karl F.
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