Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2008-09-04
2010-06-08
Benson, Water (Department: 2837)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
Reexamination Certificate
active
07732993
ABSTRACT:
An ultrasonic sensor with stabilized transmitting/receiving characteristics capable of achieving a desired directivity easily and at low cost and a method for manufacturing the same are provided. The ultrasonic sensor includes a base composed of a synthetic resin. The base includes a cylindrical side portion and a ring-shaped bent portion extending inward from a first opening of the side portion. A ring-shaped recessed portion is provided in the inner surface of the bent portion adjacent to the end of the bent portion. A piezoelectric element is disposed on the recessed portion. A sound absorber and a weight are fitted and fixed in the base. An outer casing composed of a synthetic resin is provided so as to cover the outer surface of the piezoelectric element and the outer surface of the base.
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PCT/JP2007/054178 Written Opinion dated May 6, 2007.
Addison Karen B
Benson Water
Dickstein , Shapiro, LLP.
Murata Manufacturing Co. Ltd.
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