Pneumatic release for load hook

Details Pneumatic release for load hook Pneumatic release for load hook

1981-09-08

1983-11-22

Cherry, Johnny D.

Handling: hand and hoist-line implements

Hook, hoistline, or grab type

Locking device

294 81R, 294 88, B66C 138

Patent

active

044164807

ABSTRACT:
The lifting of a load moves a piston to pump a charge of air into a small compressed air reservoir above a load hook. A remote control radio signal opens a valve to transmit the air pressure to the load hook causing the hook to release itself from its load. The device may be incorporated in a self contained module associated with a single load hook or it may be adapted to a lifting frame having a plurality of releasable load hooks. Also, the device may be arranged to produce the pumping stroke of the piston by lowering the lifting frame down on top of the load as the load is lowered onto a support.

REFERENCES:
patent: 2370528 (1945-02-01), Fontaine
patent: 2998277 (1961-08-01), Himel
patent: 3101213 (1963-08-01), Elsner
patent: 3310335 (1967-03-01), Shuey
patent: 3401739 (1968-09-01), Opletal
patent: 4095833 (1978-06-01), Lewis
patent: 4293155 (1981-10-01), Grant

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