Piezoelectric fan

Details Piezoelectric fan Piezoelectric fan

1997-05-19

1999-07-13

Freay, Charles G.

Pumps

Motor driven

Electric or magnetic motor

417436, F04B 3504

Patent

active

059217570

ABSTRACT:
A piezoelectric fan comprises at least one piezoelectric element having a rectangular piezoelectric plate of large aspect ratio, made from a piezoelectric material, and conductive metal layers provided on both surfaces of the piezoelectric plate. At least one of the conductive metal layers has a plurality of reinforcing ribs extending parallel to the long side of the piezoelectric element and formed integrally with the conductive metal layers or as a separate member collectively. The reinforcing ribs increase the long side direction rigidity of the piezoelectric element. As a result, the long side direction or lateral mode resonance of the piezoelectric element can be suppressed, thus increasing the blow efficiency of the piezoelectric fan.

REFERENCES:
patent: 2611321 (1952-09-01), Shafer
patent: 4780062 (1988-10-01), Yamada et al.
patent: 4923000 (1990-05-01), Nelson

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