Electromagnetic type reciprocating pump

Details Electromagnetic type reciprocating pump Electromagnetic type reciprocating pump

1990-05-31

1991-10-08

Bertsch, Richard A.

Pumps

Motor driven

Electric or magnetic motor

F04B 3504

Patent

active

050550110

ABSTRACT:
An electromagnetic type reciprocating pump comprises an electromagnet whose magnetization and demagnetization are repeated by a half wave-rectified version of alternating current or direct current in the form of pulses, a piston having a magnetic member which is attracted by the magnetization of the electromagnet, a cylinder in which the piston is inserted and guided, a first urging member for imparting a reaction force in a backward direction to the piston which is moved in a forward direction and a second urging member for imparting a reaction force, which is weaker than that of the first urging member, to the piston in the forward direction.

REFERENCES:
patent: 2806432 (1957-09-01), Brooks
patent: 3514228 (1970-05-01), Toyoda
patent: 3804558 (1974-04-01), Naito
patent: 4021152 (1977-05-01), Toyoda
patent: 4080552 (1978-03-01), Brown
patent: 4101950 (1978-07-01), Hager et al.
patent: 4252505 (1981-02-01), Toyoda
patent: 4352645 (1982-10-01), Meyer
patent: 4838771 (1989-06-01), Kikuchi

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