Rotary piezoelectric motor for vehicle applications

Details Rotary piezoelectric motor for vehicle applications Rotary piezoelectric motor for vehicle applications

1996-11-12

1998-07-14

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310328, H02N 200, H01L 4108

Patent

active

057809569

ABSTRACT:
A piezoelectric drive to provide a rotary force to a rotating element includes a pair of circumferentially spaced fingers. The fingers are selectively moved towards and away from the rotating element with piezoelectric actuators that expand and contract. An intermediate piezoelectric actuator moves the two fingers away from each other or allows them to be moved towards each other. A bias force acts in opposition to the intermediate piezoelectric actuator. By controlling the three piezoelectric actuators, the system rotates the rotating element. The system is preferably utilized for driving a vehicle component, and most preferably, a window for a vehicle. The inventive motor provides a low cost compact motor for driving vehicle components.

REFERENCES:
patent: 4714855 (1987-12-01), Fujimoto
patent: 5068566 (1991-11-01), Culp
patent: 5270984 (1993-12-01), Mine
patent: 5314175 (1994-05-01), Izumi et al.
patent: 5410206 (1995-04-01), Leucke et al.
patent: 5465021 (1995-11-01), Visscher et al.
patent: 5640063 (1997-06-01), Zumeris et al.

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