Piezoelectric bending transducer and the use thereof

Details Piezoelectric bending transducer and the use thereof Piezoelectric bending transducer and the use thereof

1990-06-22

1992-01-07

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310330, H01L 4108

Patent

active

050794728

ABSTRACT:
A piezoelectric bending transducer is described which is suitable for installation in a valve channel. It is composed of at least one ceramic layer which is metalized on both sides and has piezoelectric properties and which is polarized such that on application of a voltage it undergoes a change in length, and of at least one rigid molding which is joined to the whole surface thereof and has approximately the same surface dimensions and which on application of a voltage does not undergo an elongation or undergoes an opposite elongation. The piezoceramic layer contains an unmetallized area which has a roughness R.sub.a of less the 0.5 .mu.m and covers an orifice in the valve channel.

REFERENCES:
patent: 3152012 (1964-10-01), Avery
patent: 4237399 (1980-12-01), Sakamoto
patent: 4340083 (1982-07-01), Cummins
patent: 4492360 (1985-01-01), Lee et al.
patent: 4545561 (1986-10-01), Brown
patent: 4567394 (1986-01-01), Frisch
patent: 4610426 (1986-09-01), Brandner
patent: 4629926 (1986-12-01), Siegal
patent: 4959581 (1990-09-01), Dantlgraber

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