Cam actuated pivotal jaw gripping apparatus

Details Cam actuated pivotal jaw gripping apparatus Cam actuated pivotal jaw gripping apparatus

1977-03-14

1978-10-24

Marbert, James B.

Handling: hand and hoist-line implements

Grapple

Pivoted jaws

294 95, 279 37, B66C 142

Patent

active

041218680

ABSTRACT:
A gripping apparatus for lifting objects remotely utilizing three pivotally mounted gripping arms driven by integral cam followers located on extremities and roller grasping means located on their opposite extremities. The cam followers are carried in tracks, located in a rotatable can which moves the gripping arms and rollers inwardly or outwardly upon rotation of the cam by a remotely controlled bi-directional electric motor. A positioning cone centers the gripping arms over the load to be gripped thereby preventing an unsymmetrical grip which could cause inadvertant or premature release of the load. A bottom limit switch senses tension in the cables upon which the apparatus is suspended to prevent activation of the gripping fingers unless the apparatus is fully lowered, and an inertia switch senses rotation of the apparatus for preventing excessive torque on the cam by reactive torque of the motor which could cause the entire apparatus to twist.

REFERENCES:
patent: 3905636 (1975-09-01), Westerlund
patent: 4032163 (1977-06-01), Holt

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