Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2006-07-11
2009-06-09
Leung, Quyen (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C310S339000
Reexamination Certificate
active
07545076
ABSTRACT:
A system and method for actively tracking a drive frequency of a piezoelectric motor is disclosed. A drive voltage can be applied at a drive frequency to an active piezoelectric element in the piezoelectric motor. A voltage response can be induced in a passive piezoelectric element that is mechanically coupled to the active piezoelectric element to movably engage the passive piezoelectric element at a voltage response frequency. A phase difference can be determined between the drive frequency and the voltage response frequency. The drive frequency of the active piezoelectric element can be adjusted until the phase difference is within a predetermined parameter.
REFERENCES:
patent: 4400641 (1983-08-01), Vishnevsky et al.
patent: 4453103 (1984-06-01), Vishnevsky et al.
patent: 4562373 (1985-12-01), Tokusima et al.
patent: 4613782 (1986-09-01), Mori et al.
patent: 4622483 (1986-11-01), Staufenberg, Jr. et al.
patent: 4727278 (1988-02-01), Staufenberg, Jr. et al.
patent: 4743792 (1988-05-01), Ueyama
patent: 4755705 (1988-07-01), Holum
patent: 4786836 (1988-11-01), Tokushima
patent: 4814660 (1989-03-01), Yamada et al.
patent: 4831306 (1989-05-01), Staufenberg, Jr. et al.
patent: 4857791 (1989-08-01), Uchino et al.
patent: 4912351 (1990-03-01), Takata et al.
patent: 4933590 (1990-06-01), Inoue et al.
patent: 4947076 (1990-08-01), Kumada
patent: 4959580 (1990-09-01), Vishnevsky et al.
patent: 4965482 (1990-10-01), Ohnishi et al.
patent: 4997177 (1991-03-01), Mori et al.
patent: 5027028 (1991-06-01), Skipper
patent: 5036245 (1991-07-01), Ohnishi et al.
patent: 5051647 (1991-09-01), Uchikawa et al.
patent: 5087852 (1992-02-01), Culp
patent: 5089740 (1992-02-01), Ono
patent: 5144187 (1992-09-01), Culp
patent: 5166572 (1992-11-01), Ohnishi
patent: 5245243 (1993-09-01), Ohnishi et al.
patent: 5453653 (1995-09-01), Zumeris
patent: 5563465 (1996-10-01), Nakahara et al.
patent: 5616980 (1997-04-01), Zumeris
patent: 5640063 (1997-06-01), Zumeris et al.
patent: 5714833 (1998-02-01), Zumeris
patent: 5777423 (1998-07-01), Zumeris
patent: 5780957 (1998-07-01), Oliver et al.
patent: 6147436 (2000-11-01), Claeyssen et al.
patent: 6201340 (2001-03-01), Matsuda et al.
patent: 6373170 (2002-04-01), Hills
patent: 6617757 (2003-09-01), Vazquez Carazo et al.
patent: 2001/0022486 (2001-09-01), Shibatani
patent: 2004/0013420 (2004-01-01), Hara
patent: 2005/0134562 (2005-06-01), Grant et al.
patent: 2007/0188048 (2007-08-01), Nagahama et al.
Hills Chris
Payne Gene
ITT Manufacturing Enterprises Inc.
Leung Quyen
Rosenau Derek J
Thorpe North & Western LLP
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