Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2007-02-07
2010-11-02
Budd, Mark (Department: 2837)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C310S316010, C310S324000, C310S323010
Reexamination Certificate
active
07825564
ABSTRACT:
A controller for a high-frequency agitation source includes a signal generator to generate a drive signal having a variable duty cycle. The drive signal is used to drive the high-frequency agitation source. The controller also includes a temperature detector to detect the temperature of the high-frequency agitation source. The controller is configured to vary the duty cycle of the drive signal in response to the temperature of the high-frequency agitation source. By varying the duty cycle of the drive signal, the average power supplied to the piezoelectric crystal can be varied while still maintaining a fixed amplitude of oscillation. This allows the temperature of a high-frequency agitator, for example, a piezoelectric crystal, to be controlled.
REFERENCES:
patent: 4001650 (1977-01-01), Romain
patent: 4602642 (1986-07-01), O'Hara et al.
patent: 5150334 (1992-09-01), Crosby
patent: 5803362 (1998-09-01), Fraccaroli
patent: 5971980 (1999-10-01), Sherman
patent: 6402046 (2002-06-01), Loser
patent: 6491840 (2002-12-01), Frankenbach et al.
patent: 6589229 (2003-07-01), Connelly et al.
patent: 6652766 (2003-11-01), Frankenbach et al.
patent: 6908962 (2005-06-01), Frankenbach et al.
patent: 6946623 (2005-09-01), Evanyk
patent: 2005/0228282 (2005-10-01), Wang et al.
patent: 2 265 845 (1993-10-01), None
patent: 2003-117282 (2003-04-01), None
GB search report directed to counterpart application GB0618483.2 mailed on Oct. 26, 2006; 1 page.
GB Search Report directed to counterpart application GB0602465.7 mailed on May 23, 2006; 1 page.
International Search Report directed to counterpart international application PCT/GB2007/000426 mailed on May 16, 2007; 5 pages.
Written Opinion directed to counterpart international application PCT/GB2007/000426; 6 pages.
Croft Nathan James
Douglas Paul Graham
Budd Mark
Dyson Technology Limited
Morrison & Foerster / LLP
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