Hydraulic wrench with gripping force proportional to applied tor

Details Hydraulic wrench with gripping force proportional to applied tor Hydraulic wrench with gripping force proportional to applied tor

1998-07-13

2000-01-11

Scherbel, David A.

Tools

Wrench, screwdriver, or driver therefor

Machine

81 5733, 81 5744, B25B 1350

Patent

active

060123605

ABSTRACT:
A hydraulic wrench for loosening large diameter threaded components has a swing body pivotally attached to a base, a clamp support, a lever and a hydraulic cylinder. The clamp support is slidably mounted on the swinging body, and a spring (or passive hydraulic cylinder) biases the clamp support into a rest position with respect to the swinging body. The lever is pivotally mounted to the clamp support and a spring biases the lever into an open position with respect to the clamp support. The hydraulic cylinder is pivotally connected to the lever and provides both gripping force and rotational torque to the subject threaded component. The gripping force applied is thus always proportional to the torque.

REFERENCES:
patent: 2823450 (1958-02-01), Thomas
patent: 3500708 (1970-03-01), Wilson
patent: 4194419 (1980-03-01), Mitchhart et al.
patent: 4916986 (1990-04-01), Junkers
patent: 5791206 (1998-08-01), Daigle et al.

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