High precision linear actuator

Details High precision linear actuator High precision linear actuator

1990-01-31

1991-10-01

Stephan, Steven L.

Electricity: motive power systems

Linear-movement motors

310 80, 74 8915, H02K 710, H02P 500, G05B 1940

Patent

active

050536850

ABSTRACT:
A high precision linear actuator includes high fidelity mechanical linkages between the motor drive and the linear displacement output shaft. Rotational motor drive output is conveyed to a rotatable spindle (20) and lead nut assembly by means of belt driven sprockets. Rotation of the lead nut assembly is converted to linear displacement of a non-rotating lead screw and output shaft. Linear actuators of the present invention also incorporate a feedback control feature employing Moire fringe pattern techniques to continuously monitor the position of the output shaft.

REFERENCES:
patent: 1366096 (1921-01-01), Perry
patent: 4273482 (1981-06-01), Lloyd et al.
patent: 4362980 (1982-12-01), Itzkowitz
patent: 4467250 (1984-08-01), Thomasson
patent: 4607956 (1986-08-01), Ishihara et al.
patent: 4709178 (1987-11-01), Burr
patent: 4719810 (1988-01-01), St. Cyr et al.

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