Control system for a movement actuator

Details Control system for a movement actuator Control system for a movement actuator

1996-02-20

1997-09-02

Nguyen, Hoang

Motors: expansible chamber type

Working member position feedback to motive fluid control

Electrical input and feedback signal means

91415, 91462, F15B 1316, F15B 1517

Patent

active

056620217

ABSTRACT:
An improved control system for a movement actuator is disclosed for moving a member between a retracted position and an extended position. The movement actuator comprises a cylinder having a piston with a fluid supply providing pressure to a first and a second side of the piston. A control applies a first and a second fluid pressure on the first and second sides of the piston for moving the member from the retracted position toward the extended position with a force related to a difference between the first fluid pressure and second fluid pressure for reducing the possibility of damage to an unintended object in the path of the member. The control applies the first fluid pressure on the first side of the piston upon the member being in proximity to the extended position for moving the member into the extended position with a force related to the first fluid pressure for insuring proper positioning of the member.

REFERENCES:
patent: 2459902 (1949-01-01), Tucker
patent: 3479924 (1969-11-01), Ferguson
patent: 3604884 (1971-09-01), Olsson
patent: 3608431 (1971-09-01), Pease, III
patent: 3763744 (1973-10-01), Fournell et al.
patent: 3803842 (1974-04-01), Aoki
patent: 4505109 (1985-03-01), Thomsen et al.
patent: 5188015 (1993-02-01), Hageman
patent: 5474138 (1995-12-01), Evarts

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