Gripping device

Details Gripping device Gripping device

1976-12-15

1978-07-11

Cherry, Johnny D.

Handling: hand and hoist-line implements

Hook, hoistline, or grab type

Locking device

214147G, 294 86R, 403 31, B66C 100

Patent

active

040997626

ABSTRACT:
A gripping device comprising two pivotally mounted gripping claws is operated by a double acting hydraulic cylinder. The entire gripping device is pivotally mounted from a crane or the like by means of a universal joint. A member is provided which is operated on by a pressure fluid in the double acting hydraulic cylinder and which serves to temporarily lock the universal joint against pivotal movement to provide a secure and firm connection between the gripping claws and the crane or the like on which the claws are supported. In one embodiment of the invention a rod engages with a ball shaped head to prevent pivotal movement of the universal joint, and in a second embodiment bellows are inflated by hydraulic fluid to prevent movement of a pivotal joint.

REFERENCES:
patent: 1237163 (1917-08-01), Brockett
patent: 3493135 (1970-02-01), Novotny
patent: 3592503 (1971-07-01), Lundberg
patent: 3889829 (1975-06-01), Dutton
patent: 3895694 (1975-07-01), Muntjanoff
patent: 3937302 (1976-02-01), Palmcrantz
patent: 3945137 (1976-03-01), Ruttershoff

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