Liquid feeding pump

Details Liquid feeding pump Liquid feeding pump

1995-12-20

1998-07-28

Freay, Charles G.

Pumps

Motor driven

Including means utilizing pump fluid for augmenting cooling,...

417403, F04B 1700, F04B 3906

Patent

active

057855064

ABSTRACT:
A liquid feeding pump includes two coaxial cylinder chambers, a piston mounted in each chamber, and a piston rod connecting the pistons. A head side of one cylinder chamber functions as a liquid chamber, a rod side functions as a first air chamber, a rod-side of the other cylinder chamber functions as a second air chamber, and a head side functions as a third air chamber. The liquid chamber is formed with liquid inlets or outlets. Each of the air chambers is formed with air inlets or outlets, a part of the supplying pipes connected to the liquid inlet or outlet of the liquid chamber is wound around an outer periphery of the other cylinder chamber, or a peripheral wall of the other cylinder chamber is formed with a liquid cooling chamber and supplying pipes communicated with and connected to the liquid inlets or outlets of the liquid chamber are connected to the liquid cooling chamber.

REFERENCES:
patent: 1353216 (1920-09-01), Carlson
patent: 1941766 (1934-01-01), Thom
patent: 3180527 (1965-04-01), Wasilewski et al.
patent: 4895497 (1990-01-01), Schlinkheider
patent: 5013198 (1991-05-01), Schultz
patent: 5092746 (1992-03-01), Henke
patent: 5131818 (1992-07-01), Witkop et al.

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