Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2005-09-20
2005-09-20
Dougherty, Thomas M. (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C310S367000, C134S001300
Reexamination Certificate
active
06946774
ABSTRACT:
A transducer comprising an acoustic energy generating means and a resonator. The acoustic energy generating means generates acoustic energy and is adapted for delivering an approximately uniform amount of acoustic energy to each unit of surface area on a substrate in a given time period when the substrate is rotating. The acoustic energy generating means has a surface area that is less than the surface area of the substrate, and may comprise two or more piezoelectric crystal segments that are separately controllable with respect to power and/or time. When assembled, the two more piezoelectric crystal segments give the acoustic energy generating means a rectangular shape, a wedge shape or a triangle shape. The resonator is attached to the acoustic energy generating means for transmitting the acoustic energy to the substrate.
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Derwent English Abstract of JP 2003-305419, Japanese Patent Office, Oct. 28, 2003.
Beck Mark J.
Liebscher Eric G.
Lillard Raymond Y.
Vennerbeck Richard B.
Dougherty Thomas M.
Pagel Donald J.
Product Systems Incorporated
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