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Class Information
Number: 367/161
Name: Communications, electrical: acoustic wave systems and devices > Signal transducers > Underwater type > Piezoelectric > Bending type > Multimorph
Description: Subject matter having two piezoelectric elements so joined and oriented relative to one another that one expands while the other contracts to produce a bending-type stress in the composite structure.

Patents under this class:

Patent Number Title Of Patent Date Issued
7069795 Sensor using electro active curved helix and double helix Jul. 4, 2006
6784600 Ultrasonic membrane transducer for an ultrasonic diagnostic probe Aug. 31, 2004
6278658 Self biased transducer assembly and high voltage drive circuit Aug. 21, 2001
6076629 Low frequency flextensional acoustic source for underwater use Jun. 20, 2000
5949741 Dual-section push-pull underwater projector Sep. 7, 1999
5926439 Flextensional dual-section push-pull underwater projector Jul. 20, 1999
5856956 Piezoelectric acoustic transducer Jan. 5, 1999
5852589 Low cost composite transducer Dec. 22, 1998
4999819 Transformed stress direction acoustic transducer Mar. 12, 1991
4709359 End weighted reed sound transducer Nov. 24, 1987
4547870 Velocity hydrophone Oct. 15, 1985
4471475 Single element cantilever mounted shear wave transducer Sep. 11, 1984
4326155 Shockwave probe Apr. 20, 1982
4013992 Diver's piezoelectric microphone with integral AGC preamplifier Mar. 22, 1977

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