Handling: hand and hoist-line implements – Grapple – Lewises
Patent
1979-10-17
1981-09-22
Cherry, Johnny D.
Handling: hand and hoist-line implements
Grapple
Lewises
52125, 52707, 294 95, B66C 166
Patent
active
042906385
ABSTRACT:
Apparatus such as a pickup unit for releasable connection to a member such as an anchor insert embedded in an object such as a concrete body, of the type including a housing forming part of the apparatus and which is inserted into the object adjacent to the member, lugs movably mounted in the housing for releasable engagement with the member, and an actuator movably mounted in the housing for moving the lugs between member-engaging and disengaging dispositions, is provided with sockets in the housing, a lug mounted in each socket for reciprocal rotational movement between such dispositions, the actuator having first reaction surfaces engaging the lugs to prevent them from being rotated under load, and a seat for each lug forming a part of the socket structure and providing a second reaction surface for transferring to the housing load forces exerted on the lug by the member. Preferably, the socket structure additionally includes a third reaction surface facing oppositely to each second reaction surface, and the third reaction surfaces also act to prevent the lugs from being rotated under load.
REFERENCES:
patent: 1671429 (1928-05-01), Janney
patent: 2261393 (1941-11-01), Kothny
patent: 3284125 (1966-11-01), Blaske et al.
patent: 3431012 (1969-03-01), Courtois et al.
patent: 4017115 (1977-04-01), Holt et al.
patent: 4068879 (1978-01-01), Torbet et al.
patent: 4123882 (1978-11-01), Case et al.
patent: 4204711 (1980-05-01), Lancelot et al.
Cherry Johnny D.
Superior Concrete Accessories, Inc.
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