Hoisting accessory

Details Hoisting accessory Hoisting accessory

1979-12-17

1981-09-01

Cherry, Johnny D.

Handling: hand and hoist-line implements

Hoistline attached load supporting frame

B66C 110

Patent

active

042868173

ABSTRACT:
A hoisting accessory to be connected to a hoisting device for facilitating the placing of a load through openings in walls and the like. The accessory has a support arm (10), at one end of which a load coupling unit (11) is provided for carrying a load. At its other end the support arm (10) has a counterweight (20) including a suspension unit (22) extending downwards from the support arm and along which a movable unit (23) is displaceable under action of gravity from a retracted position to an extended position. Between the ends of the support arm (10) there is a lift yoke (30) for connection to the hoisting device. A releasable locking device (50) prevents the movable unit (23) from moving. An actuator (19, 15; 63) is provided to release the locking device in response to charging of the load coupling unit (11). In a preferred embodiment the actuator is adjustable.

REFERENCES:
patent: 3572803 (1971-03-01), Pompe
patent: 3675961 (1972-07-01), Wheeler
patent: 3879077 (1975-04-01), Celio
patent: 4017109 (1977-04-01), Belinsky

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