Piezoelectric ultrasonic converter with polyurethane foam damper

Details Piezoelectric ultrasonic converter with polyurethane foam damper Piezoelectric ultrasonic converter with polyurethane foam damper

1984-01-09

1985-08-20

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310324, 310334, 310336, 310345, 73644, H01L 4108

Patent

active

045366730

ABSTRACT:
The invention relates to an ultrasonic converter with a plate type ceramic oscillator in which metal electrodes are fastened to the oscillator. At one end face of the ceramic oscillator an adaptation layer of plastic is present. The entire ultrasonic oscillator, except for the side of the adaptation layer facing the medium to be insonated, is provided with a foam covering, to reduce decay damping without a substantial loss in the transmission factor.

REFERENCES:
patent: 3239696 (1966-03-01), Burkhalter et al.
patent: 3950660 (1976-04-01), McElroy
patent: 3969927 (1976-07-01), Yoshida et al.
patent: 4079362 (1978-03-01), Grimm et al.
patent: 4081889 (1978-04-01), Levine
patent: 4326274 (1982-04-01), Hotta et al.
Ultrasonic Engineering, by Julian R. Frederick, John Wiley & Sons, Inc., N.Y., 1965, pp. 261, 262.

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