Lifting device

Details Lifting device Lifting device

1978-07-27

1980-04-01

Cherry, Johnny D.

Handling: hand and hoist-line implements

Grapple

Pivoted jaws

B66C 164

Patent

active

041958730

ABSTRACT:
A lifting device for use in association with concrete forming structures is provided. The lifting device has a pair of jaws, mounted on an axle, with a lifting lug associated with one of the jaws and a handle associated with the other of the jaws so that the other jaw may be hingedly moved relative to the first jaw. A spring loaded locking pin is provided to lock the second jaw in either an open or closed position, relative to the first position. The locking pin and the handle are each operable from above the lifting device. The inner ends of each of the hook-like jaws are rounded so as to specifically match the root configuration between the web and top flange of an upper chord of a truss, or other component of a concrete forming structure intended to be lifted using the lifting device of the present invention.

REFERENCES:
patent: 673356 (1901-04-01), Brittain
patent: 1150581 (1915-08-01), Delan
patent: 1580083 (1926-04-01), Boadle
patent: 2013621 (1935-09-01), Beal et al.
patent: 3572808 (1971-03-01), Miller
patent: 3632152 (1972-01-01), Renfroe

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