Ultrasonic motor with rotor converting longitudinal vibrations i

Details Ultrasonic motor with rotor converting longitudinal vibrations i Ultrasonic motor with rotor converting longitudinal vibrations i

1998-04-07

2000-12-26

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

31032312, H02N 200

Patent

active

061664774

ABSTRACT:
An ultrasonic motor having a stator in which at least a longitudinal vibration is generated and a rotor rotatably mounted on the stator. Slanted slits are formed on the cylindrical surface of the rotor, which convert a part of the longitudinal vibration in the stator into a twisting vibration that gives the rotor a rotational force. The slits are slanted to the rotational direction of the rotor. The rotor is rotated at a higher speed because of the slits. The form of the slits may be selectively varied according to desired characteristics of the ultrasonic motor.

REFERENCES:
patent: 4019073 (1977-04-01), Vishnevsky et al.
patent: 4210837 (1980-07-01), Vasiliev et al.
patent: 4947076 (1990-08-01), Kumada
patent: 4983874 (1991-01-01), Yamaguchi
patent: 5233257 (1993-08-01), Luthier et al.
patent: 5247220 (1993-09-01), Miyazawa et al.
patent: 5521455 (1996-05-01), Miyazawa et al.
patent: 6018213 (2000-01-01), Yano

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