Bellows pump

Details Bellows pump Bellows pump

1995-12-22

1997-08-12

Gluck, Richard E.

Pumps

Motor driven

Fluid motor

417472, F04B 4306

Patent

active

056558937

ABSTRACT:
A bellows pump exhibiting stable and highly efficient performance. The bellows pump is composed of a first work chamber for admitting fluid, a second work chamber for storing work fluid, a bellows for parting a chamber space into the first and the second work chambers; a plunger being movable in a reciprocative manner to and form the second work chamber; a work fluid chamber which is opened; and a drive member for the plunger.
The plunger is provided with a flow channel with a second communication port communicating only at the initial and completing stage of an inflow process of the fluid. A first communication port locates in the vicinity of a top of the first work chamber. The second communication port locates above the first communication port.

REFERENCES:
patent: 2343962 (1944-03-01), Dodson
patent: 2843045 (1958-07-01), Mashinter
patent: 3507583 (1970-04-01), James
patent: 4865525 (1989-09-01), Fritsch et al.
patent: 5221196 (1993-06-01), Harbig et al.
patent: 5520523 (1996-05-01), Yorita et al.

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