Sound or ultrasound sensor

Details Sound or ultrasound sensor Sound or ultrasound sensor

2007-03-13

2007-03-13

Dougherty, Thomas M. (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S326000, C310S327000

Reexamination Certificate

active

10509685

ABSTRACT:
A sound or ultrasound sensor having a radiation characteristic with a preferably small beam angle and producing very little interference signals, including a pot-shaped housing closed at its bottom end by a floor, a piezoelectric element for producing and/or receiving sound or ultrasound through the floor, a matching layer between the piezoelectric element and the floor, and a metal ring gripping around the matching layer with an interlocking fit.

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patent: 43 23 134 (1994-06-01), None
patent: 43 11 963 (1994-10-01), None
patent: 4330745 (1995-04-01), None

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