Pumps – Motor driven – Magnetostrictive chamber
Patent
1991-11-27
1993-03-09
Bertsch, Richard A.
Pumps
Motor driven
Magnetostrictive chamber
417 53, F04B 3504
Patent
active
051921979
ABSTRACT:
An electric pump comprises a housing (22) that encloses a stack of waveplates (18) in which electrically created traveling waves forcefully move fluid (20) from an inlet duct (24) to an outlet duct (26). Each waveplate is made of shear type transducer material that is segmented by film electrodes, the electrode planes lying perpendicular to the direction of fluid flow. Electrode sets are stimulated by a multiphase electrical power source. The pressure at wave crest contacts is electrically controlled to hermetically trap fluid portions between waves, thereby achieving high throughput against high pressure differential. Rubbing is essentially absent throughout the pump, life shortening mechanisms being few and benign. High electromechanical efficiency obtains when waveplates are stimulated by electrically resonant frequencies. Pump variants include variable wavelength, variable wave amplitude, and tapered waveplates for improved effectiveness with compressible fluids. An increasing-wavelength variant is applicable to high specific impulse space propulsion. Other embodiments provide the functions of valves, filters, light modulators, microwave attenuators, fluid flow modulators grinders, x-ray imagers, and emulsifiers.
REFERENCES:
patent: 3150592 (1964-09-01), Stec et al.
patent: 4688536 (1987-08-01), Mitsuyasu et al.
patent: 4697989 (1987-10-01), Perlov et al.
patent: 4780062 (1988-10-01), Yamada et al.
patent: 4803393 (1989-02-01), Takuhashi
patent: 4842493 (1989-06-01), Nilsson
patent: 4939405 (1990-07-01), Okuyama
Bertsch Richard A.
Faulkner David C.
Field Harry B.
Freay Charles G.
Hamann H. Fredrick
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