Actuator

Details Actuator Actuator

1998-09-30

2000-08-15

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

31032316, 31031601, H01L 4108

Patent

active

06104122&

ABSTRACT:
This invention is an actuator including a vibration member to which a piezoelectric element is fixed, a plurality of projections arranged at node positions of a tertiary stationary wave on the vibration member, another plurality of projections arranged at node positions of a quintic stationary wave on a vibration member, a rotating member which is in press contact with these projections, and a fixing member for holding the vibration member and pivotally holding the rotating member. A tertiary or quintic stationary wave is selectively excited in the vibration member to rotate the rotating member in one direction or another direction.

REFERENCES:
patent: 4857791 (1989-08-01), Uchino et al.
patent: 5783899 (1998-07-01), Okazaki
patent: 5821667 (1998-10-01), Takagi et al.
patent: 5831370 (1998-11-01), Sugaya
patent: 5905327 (1999-05-01), Ooi et al.
patent: 5917268 (1999-06-01), Takagi

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