High precision linear actuator
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United States of America Patent
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Oct 1, 1991
Grant Date -
N/A
app pub date -
Jan 31, 1990
filing date -
Jan 31, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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