Pump having pistons and valves made of electroactive actuators

Details Pump having pistons and valves made of electroactive actuators Pump having pistons and valves made of electroactive actuators

1996-02-09

1997-05-20

Freay, Charles G.

Pumps

Motor driven

Magnetostrictive chamber

417417, 417488, 417505, F04B 4304, F04B 1900, F04B 3908

Patent

active

056307098

ABSTRACT:
The present invention provides a pump for inducing a displacement of a fluid from a first medium to a second medium, including a conduit coupled to the first and second media, a transducing material piston defining a pump chamber in the conduit and being transversely displaceable for increasing a volume of the chamber to extract the fluid from the first medium to the chamber and for decreasing the chamber volume to force the fluid from the chamber to the second medium, a first transducing material valve mounted in the conduit between the piston and the first medium and being transversely displaceable from a closed position to an open position to admit the fluid to the chamber, and control means for changing a first field applied to the piston to displace the piston for changing the chamber volume and for changing a second field applied to the first valve to change the position of the first valve.

REFERENCES:
patent: 2785638 (1957-03-01), Moller
patent: 4558995 (1985-12-01), Furukawa et al.
patent: 4939405 (1990-07-01), Okuyama et al.

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