Solid state blower
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United States of America Patent
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-
Feb 12, 1985
Issued Date -
N/A
app pub date -
Mar 22, 1983
filing date -
May 2, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pumping device comprising: a housing; piezoelectric element having one end mounted to the housing and one end free; a generally planar impeller blade connected to the free end of the piezoelectric element and having its distal end unconstrained by the housing; the blade having a high Q factor, a high stiffness-to-weight ratio and a low mass per unit area substantially less than that of the piezoelectric element; a voltage is applied to the piezoelectric element for oscillating its free end perpendicular to its plane at or close to resonance and propagating a traveling wave along the blade to generate and shed vortices at the distal end of the blade.
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