Tools – Wrench – screwdriver – or driver therefor – Machine
Patent
1990-10-31
1992-12-29
Smith, James G.
Tools
Wrench, screwdriver, or driver therefor
Machine
81 5719, 81 5744, B25B 1350
Patent
active
051741750
ABSTRACT:
A fluid actuator for a hydraulically powered rotatable gripping device which combines a fluid pressure or force multiplication with the capability of a physical separation of the rotating jaws and the fluid power source to permit rotation of the jaws and any gripped object while maintaining clamping or gripping pressure.
REFERENCES:
patent: 3696872 (1972-10-01), Jonsson
patent: 4732061 (1988-03-01), Dinsdale
patent: 4811635 (1989-03-01), Falgout, Sr.
Frank's Casing Crew & Rental Tools, Inc.
Smith James G.
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