Pneumatically powered linear actuator control apparatus and meth

Details Pneumatically powered linear actuator control apparatus and meth Pneumatically powered linear actuator control apparatus and meth

1996-08-13

2000-09-12

Nguyen, Hoang

Motors: expansible chamber type

Rotary and reciprocating working members

91451, 92136, F01B 1300, F01B 900

Patent

active

06116139&

ABSTRACT:
A combination drive and method for applying power through a piston rod (A) operated by an air cylinder (B) is controlled by an elongated self-locking threaded drive member (C) rotated by an electric motor (D) for affording positioning and velocity control for the air operated cylinder and the guided piston rod which stops and is positively positioned upon cessation of operation of the electric motor. Control apparatus includes a valve housing (35) positioning a spool (40) fixed on one end to the elongated threaded drive member (C), and an assembly (45) for moving the spool axially in respect to the electric motor (D) through an axially compliant coupling (50) so that by controlling the motor the valve is thereby controlled.

REFERENCES:
patent: 1495286 (1924-05-01), Williams
patent: 1549332 (1925-08-01), Roberts
patent: 2010321 (1935-08-01), Renfer
patent: 4418781 (1983-12-01), Rabe et al.
patent: 5577433 (1996-11-01), Henry

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