Movement device utilizing electromechanical conversion elements

Details Movement device utilizing electromechanical conversion elements Movement device utilizing electromechanical conversion elements

1996-11-04

1997-11-11

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

H02N 200

Patent

active

056867786

ABSTRACT:
A movement device, which moves an object with high accuracy and with little effect or wear on frictional surfaces. A first pair of piezoelectric elements are fixed to a base such that they expand and contact in a relative movement direction. A second pair of piezoelectric elements are fixed to the base such that they expand and contract in a direction perpendicular to the relative movement direction. A first vibrating body is connected to the first piezoelectric elements. A second vibrating body is positioned such that it does not contact the first vibrating body and moves in a predetermined direction relative to the base when the second vibrating body and the object lose contact. The second vibrating body and the object come in contact, and the first vibrating body and the object lose contact when the vibrating body moves in an opposite direction to the predetermined direction.

REFERENCES:
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patent: 4468583 (1984-08-01), Mori
patent: 4874979 (1989-10-01), Rapp
patent: 4894579 (1990-01-01), Higuchi et al.
patent: 5027027 (1991-06-01), Orbach
patent: 5043621 (1991-08-01), Culp
patent: 5325010 (1994-06-01), Besocke et al.
patent: 5424597 (1995-06-01), Gloss et al.
patent: 5453653 (1995-09-01), Zumeris

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