Piezoelectric pump

Pumps – Motor driven – Magnetostrictive chamber

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417410, 346140R, 310328, F04B 1700

Patent

active

048424935

ABSTRACT:
In order to significantly intensify the pump action in a piezoelectric pump without long-term, negative consequences, and in order to be able to employ a great variety of fluids, the pump of the invention is formed of piezoceramic parts arranged essentially parallel to and at a distance from one another. They are provided with electrical contacts at both sides, and are covered at both sides with closure means. The cavity between the piezoceramic parts and the closure means forms the pump channel. The electrical contacts lie essentially perpendicular relative to the closure means. The polarization direction in the piezoceramic parts lies parallel to the electrical field strength. A multi-channel pump, particularly for an ink-jet matrix printer means, can be manufactured in an especially simple way by use of known semiconductor manufacturing techniques.

REFERENCES:
patent: 3390559 (1968-07-01), Steutzer
patent: 4364067 (1982-12-01), Koto et al.
patent: 4533219 (1985-08-01), Aldrich
patent: 4536097 (1985-08-01), Nilsson
patent: 4566017 (1986-01-01), Nilsson
patent: 4668964 (1987-05-01), Padalino et al.
Edmiston, "Piezoceramic Transducers", Electronic Design 18, Sept. 1, 1974, pp. 78-82.
Reynolds III et al., "Consider Piezoelectric Ceramics", Electronic Design 19, Sept. 13, 1977, pp. 92-97.
"Recording Head", by Hiroshi Kiyougora--vol. 3, No. 150, (E-158), Dec. 11, 1979.

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