Piezoelectric vibration wave motor with sloped drive surface

Details Piezoelectric vibration wave motor with sloped drive surface Piezoelectric vibration wave motor with sloped drive surface

1983-12-05

1985-01-22

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310 82, 310321, H01L 4108

Patent

active

044954328

ABSTRACT:
In a vibration wave motor, a plurality of electrostrictive elements are phase-differentially arranged or polarized on a ring-shaped vibration member having a thickness which increases as it radially goes from a center to an outer circumference, periodic voltages are applied to the electrostrictive elements to generate a travelling vibration wave in the vibration member, and a movable member press-contacted to the vibration member is friction-driven by the travelling vibration wave.

REFERENCES:
patent: 2275827 (1942-03-01), Plensler
patent: 4019073 (1977-04-01), Vishnevsky et al.
patent: 4400641 (1983-08-01), Vishnevsky et al.

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