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US 5,053,670 AGranted
Precision actuator
AssigneeCanon Kabushiki Kaisha
InventorMasao Kosugi
Life of this patent
Estimating the term…
Abstract
A precision actuator includes a housing; an ultrasonic motor disposed in the housing and having a ring-like rotor and a stator; an output shaft; a rotation-restraint rectilinear motion guide for coupling the output shaft to the housing, slidably in an axial direction but unrotatably relative to it; and a screw mechanism for coupling the output shaft to the rotor.
Claims14
A precision actuator, comprising:
- a housing;
- an ultrasonic motor disposed in said housing and having a ring-like rotor and a stator;
- an output shaft;
- rotation-restraint rectilinear motion guide means for coupling said output shaft to said housing, slidably in an axial direction but unrotatably relative to it;
- and
- screw means for coupling said output shaft to said rotor.
3 more elements
A precision actuator, comprising:
- a housing;
- a stationary member provided in said
- an output shaft;
- a first ultrasonic motor mounted to said stationary member;
- a second ultrasonic motor mounted to said stationary member in a coaxial relationship with said first ultrasonic motor;
- rotation-restraint rectilinear motion guide means for coupling said output shaft to said first ultrasonic motor, slidably in an axial direction but unrotatably relative to it;
- and
- screw means for coupling said output shaft to said second ultrasonic motor.
5 more elements
Dependencies are inferred from the claim text.