Stretched piezopolymer transducer with unsupported areas

Details Stretched piezopolymer transducer with unsupported areas Stretched piezopolymer transducer with unsupported areas

1984-03-12

1985-12-10

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310324, 310800, 179110A, H01L 4108

Patent

active

045582491

ABSTRACT:
In the disclosed transducer, a frame supports the edges of a piezopolymer sheet coated on both faces with electrodes, while a holding structure supports an area but leaves a larger area of the central portion of the sheet unsupported. According to preferred embodiments, the frame stretches the sheet, in the form of a membrane, across one or more contact areas on the holding structure, and the contact area approximates a point located near the center of the sheet or a number of concentric annuli. Preferably, the structure forms one terminal contacting one electrode and the frame forms another terminal contacting the other electrode.

REFERENCES:
patent: 3832580 (1974-08-01), Yamamuro
patent: 4056742 (1977-11-01), Tibbetts
patent: 4156800 (1979-05-01), Sear et al.
patent: 4186323 (1980-01-01), Cragg et al.
patent: 4440983 (1984-04-01), Facoetti et al.

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