Servo-pneumatic actuator

Motors: expansible chamber type – Working member position responsive motive fluid control

Reexamination Certificate

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Details

C091S466000

Reexamination Certificate

active

11210196

ABSTRACT:
A positioning system includes an actuator, valve (preferably pneumatic), position sensor and an electronic valve controller, integrated in a single unit. Continuously variable setpoints are possible within the range of operation. A preferred control circuit includes a signal converter, a ramp generator to smooth the shape of the command or target value signal applied, a position feedback sensor to report the actual position of the actuator, a controller, and a driver, containing an H-bridge, for controlling the pneumatic valve which feeds air into the actuator mechanism. Integration of all these components into a single unit shortens signal paths, improves resistance to electrical noise, and permits faster response time.

REFERENCES:
patent: 5424941 (1995-06-01), Bolt et al.
patent: 5460201 (1995-10-01), Borcea et al.
patent: 6755115 (2004-06-01), Stoll et al.

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