Traveling wave pump employing electroactive actuators

Details Traveling wave pump employing electroactive actuators Traveling wave pump employing electroactive actuators

1996-06-25

1999-10-05

Mohanty, Bibhu

Pumps

Motor driven

Magnetostrictive chamber

4174132, 4174133, F04B 1700

Patent

active

059612983

ABSTRACT:
A traveling wave pump which employs one or more pairs of interfacing plates to transfer fluid (gas or liquid) from one or more inlets to one or more outlets. At least one of the plates in each pair of interfacing plates is driven so as to produce a flexure traveling wave therein. Actuators incorporating electroactive elements are used to drive the driven plates and create the flexure traveling wave. This wave causes chambers to form between the interfacing plates which move from one end of the driven plate to the other in the direction of the wave. Fluid is drawn into a forming chamber, and eventually the forming chamber closes trapping the fluid therein. The fluid is then transported through the pump by the now completely formed chamber as it propagates along the plate interface. If only one of the interfacing plates is driven, the other remains fixed in that no chambers are formed at its surface. However, where both plates are driven, the traveling waves therein are synchronized and coincident chambers are formed at the surface of both plates, thereby doubling the amount of fluid pumped. In addition, the flow direction can be changed by controlling the phase of the drive signals.

REFERENCES:
patent: 4395719 (1983-07-01), Majewski et al.
patent: 5078581 (1992-01-01), Blum et al.
patent: 5192197 (1993-03-01), Culp
patent: 5215446 (1993-06-01), Takahashi et al.
patent: 5224843 (1993-07-01), van Lintel

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