Lifting beam

Details Lifting beam Lifting beam

1977-08-29

1978-12-05

Cherry, Johnny D.

Handling: hand and hoist-line implements

Spacing hoist bar or frame

Load gripping units

294 83R, B66C 122

Patent

active

041282671

ABSTRACT:
A lifting beam comprising an elongate member carrying one or more pivotally mounted hooks for engagement of a load to be lifted, there being a balance weight pivotably mounted on the or each hook to lie on either side of the pivotal axis thereof so as to cause the hook to be biased into or from engagement with the load such that selection of the position of the balance weight enables the beam automatically to pick up or release the load when the beam is lowered on to same.

REFERENCES:
patent: 761809 (1904-06-01), Anderson
patent: 1270995 (1918-07-01), Weickel
patent: 1320688 (1919-11-01), Healy
patent: 1853887 (1932-04-01), Stiffler
patent: 1865380 (1932-06-01), Moore
patent: 4045071 (1977-08-01), Dunstan

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