Linkage lifting apparatus

Details Linkage lifting apparatus Linkage lifting apparatus

1988-12-09

1990-03-27

Basinger, Sherman D.

Traversing hoists

Closure remover

212220, 212221, 294 811, 294 815, 294 8226, 405106, B66C 1112, E02B 736

Patent

active

049113135

ABSTRACT:
A linkage lifting apparatus is disclosed in which a linkage means is mounted on a lifting beam and includes link pivotal connections which may be connected and disconnected from load hooks comprising part of an object to be lifted. The linkage lifting apparatus includes a latching means which holds two link pairs in a position in which the link pivotal connections may engage the load hooks. The latching means is releasable from the link pairs in response to downward movement of the lifting beam against the link pairs. The pivotal connections move into a lifting position in engagement with the hooks in response to force provided by the weight of links comprising part of the two link pairs. The two link pairs and the pivotal connections movable out of the lifting position and the link pairs are again latched by the latching mechanism to hold them free of the load hooks also in response to downward movement of the lifting beam against the link pairs.

REFERENCES:
patent: 2047141 (1936-07-01), Fildes
patent: 2119547 (1938-06-01), Knerr
patent: 2130354 (1938-09-01), Madsen
patent: 2665937 (1954-01-01), Reigh
patent: 2669479 (1954-02-01), Louckes
patent: 3262729 (1966-07-01), Willison et al.
patent: 4202576 (1980-05-01), Hasquenoph et al.

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