Releasable gripper assembly for a jacking mechanism

Details Releasable gripper assembly for a jacking mechanism Releasable gripper assembly for a jacking mechanism

1976-03-31

1977-06-21

Smith, Al Lawrence

Implements or apparatus for applying pushing or pulling force

Step-by-step traveling bar

Clutch actuated

B66F 108

Patent

active

040306984

ABSTRACT:
A jack assembly for use in raising and lowering large platforms on columns, caissons and the like, having upper and lower annular portions interconnected by hydraulic motor means for relative vertical movement therebetween and a plurality of arcuate pneumatically operated gripper assemblies in both the upper and lower portions of the jack; each of the gripper assemblies being removably replaceable from its position in the jack assembly without removal of the jack assembly from the caisson which it surrounds.

REFERENCES:
patent: 2970445 (1961-02-01), Suderow
patent: 3604683 (1971-09-01), Sutton

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