Dual force actuator

Details Dual force actuator Dual force actuator

1971-09-16

1977-03-15

Schwadron, Martin P.

Power plants

Pressure fluid source and motor

Pulsator

F15B 300

Patent

active

040117243

ABSTRACT:
Actuator for selectively and sequentially providing dual pressure forces for positioning and seating fasteners and for other purposes. Air pressure is selectively applied to a first piston to apply a relatively low level of hydraulic pressure to the actuating rod and then to a second pneumatic piston to intensify the hydraulic pressure applied to the actuating rod. The actuator is caused to be extended a first distance at low force and then to be extended an additional distance at a relatively higher force. Air pressure is selectively applied to cause all pistons and the actuating rod to retract to their initial positions.

REFERENCES:
patent: 2032185 (1936-02-01), Sciaky
patent: 2169423 (1939-08-01), Kessler et al.
patent: 2656745 (1953-10-01), Forichon
patent: 3253412 (1966-05-01), Torossian
patent: 3426530 (1969-02-01), Georgelin
patent: 3499369 (1970-03-01), Joseph

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