Electromagnetic reciprocating pump

Details Electromagnetic reciprocating pump Electromagnetic reciprocating pump

1991-02-26

1992-04-14

Bertsch, Richard A.

Pumps

Motor driven

Electric or magnetic motor

417418, 74110, F04B 1704, F16H 2518

Patent

active

051042991

ABSTRACT:
An electromagnetic reciprocating pump having a piston electromagnetically moved at least in one direction is comprised of a frame having attached thereto an electromagnet which operates the piston, an inner cylinder whose one end side in the axial direction is secured to the frame and the other side thereof is closed and having the piston accommodated therein such that the piston can be reciprocated therein, an outer cylinder whose one end in the axial direction being secured to the frame and coaxially encircling the inner cylinder so as to form a working chamber between it and the inner cylinder, an outer piston accommodated within the working chamber so as to freely reciprocate and varying a capacity of working chamber, spring means being contracted and expanded in accordance with the movement of the outer piston, and magnetic coupling means for magnetically coupling the inner piston and the outer piston. The piston has a shape such that this piston does not form a pressure in the inner cylinder when reciprocated within the first cylinder. Further, the outer cylinder has a suction opening and a discharge opening, each having a valve, for sucking and discharging a special fluid, such as corrosive liquid, into and from the working chamber.

REFERENCES:
patent: 4261689 (1981-04-01), Takahashi
patent: 4752194 (1988-06-01), Wienen et al.
patent: 4838771 (1989-06-01), Kikuchi
patent: 4871301 (1989-10-01), Buse
patent: 4924675 (1990-05-01), Higham et al.

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