Positive shut off electromagnetic fluid pump

Details Positive shut off electromagnetic fluid pump Positive shut off electromagnetic fluid pump

1986-03-10

1988-02-16

Croyle, Carlton R.

Pumps

Motor driven

Electric or magnetic motor

310 30, F04B 1704

Patent

active

047252081

ABSTRACT:
A positive shut-off electromagnetic fluid pump of the type having a piston electromagnetically reciprocated in a cylindrical guide by a solenoid coil and a pair of valves for providing a unidirectional fluid flow from an inlet port to an outlet port in response to the reciprocation of the piston. An elastomer bumper attached to the piston occludes the outlet port when the piston is biased to its extreme position adjacent to the outlet port when the solenoid coil is de-energized.

REFERENCES:
patent: 1162562 (1915-11-01), Brown
patent: 2984529 (1961-05-01), Dailey
patent: 3039127 (1962-06-01), Molenaar
patent: 4101950 (1978-07-01), Hager et al.
patent: 4488477 (1984-12-01), Miyamoto
patent: 4643653 (1987-02-01), Masaka et al.
patent: 4661048 (1987-04-01), Masaka et al.

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