Vibration wave motor

Details Vibration wave motor Vibration wave motor

1987-03-23

1988-03-29

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310328, 310321, 310317, H01L 4108

Patent

active

047346108

ABSTRACT:
A vibration wave motor includes circular shape vibration part having a helical stepped portion inside or outside thereof; a unit, coupled to said vibration part for causing the vibration part to generate a travelling vibration wave propagating along a circumferential direction of the vibration part; and a movable part having a stepped portion threadably engaged with the helical stepped portion, the movable part being frictionally driven by the travelling vibration wave generated by the vibration part.

REFERENCES:
patent: 3238476 (1966-03-01), Borner et al.
patent: 3351393 (1967-11-01), Emmrich
patent: 3595007 (1971-07-01), Baker, Jr.
patent: 4210837 (1980-07-01), Vasilieu et al.
patent: 4600854 (1986-07-01), Bednorz et al.
patent: 4634916 (1987-01-01), Okada et al.
patent: 4663556 (1987-05-01), Kumada

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