Surface acoustic wave motor

Details Surface acoustic wave motor Surface acoustic wave motor

2006-03-27

2009-11-10

Dougherty, Thomas M (Department: 2837)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S31300R, C310S31300R, C310S316010, C310S316020

Reexamination Certificate

active

07615909

ABSTRACT:
In an energy recovery type surface acoustic wave motor, an increase in energy efficiency at the time of energy recovery and supply is achieved by adjusting phase change. A surface acoustic wave motor comprises: a surface acoustic wave substrate; a slider provided with an applied pressure; a driving interdigital electrode connected to an external power supply for generating a driving surface acoustic wave on a surface so as to drive the slider by a frictional force which is generated on a contact surface of the slider with the surface acoustic wave substrate based on the surface acoustic wave and the applied pressure; recovery interdigital electrodes placed forward and backward in the direction of travel of the surface acoustic wave for recovering energy of a surface acoustic wave unused to drive the slider, and for using that energy to generate a surface acoustic wave; and phase adjusting means for matching the phase of a surface acoustic wave generated by the recovery interdigital electrodes to the phase of the driving surface acoustic wave generated by the driving interdigital electrode.

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patent: 6331747 (2001-12-01), Yoshida et al.
patent: 6516665 (2003-02-01), Varadan et al.
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patent: 7365473 (2008-04-01), Vermeulen et al.
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patent: 9-233865 (1997-09-01), None
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patent: 11-146665 (1999-05-01), None
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English Language Abstract of JP 11-146665.
English Language Abstract of JP 2001-359287.
English Language Abstract of JP 2001-238473.
English Language Abstract of JP 9-322573.
English Language Abstract of JP 9-233865.

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