Single hand operated tool

Details Single hand operated tool Single hand operated tool

1977-07-13

1979-04-17

Geoghegan, Edgar W.

Power plants

Pressure fluid source and motor

Ram driven by fluid pumped from reservoir

60481, 60DIG10, 30180, F15B 1518

Patent

active

041493818

ABSTRACT:
A single-hand operated tool comprising: first and second relatively movable elements adapted to be associated with a head assembly for application of pressure to a workpiece; a housing; a hydraulic pump disposed within the housing; hydraulic fluid communication means associated with the pump for exerting hydraulic force on the relatively movable elements; articulated lever means associated with the pump and arranged such that reciprocal motion of the lever means provided by the action of a single hand, unassisted, operates the pump and produces a desired force on the workpiece; release valve means for releasing the force exerted by the hydraulic fluid in response to a manual actuation produced by the single hand and including a valve stem and seat wherein the force urging seating of the valve stem against the valve seat is smaller than the desired force.

REFERENCES:
patent: 2979032 (1961-04-01), Engquist et al.
patent: 3058214 (1962-10-01), Mekler

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