Pump for pumping a fluid comprising a liquified gas

Details Pump for pumping a fluid comprising a liquified gas Pump for pumping a fluid comprising a liquified gas

1988-05-09

1990-04-10

Smith, Leonard E.

Pumps

Expansible chamber type

Multiple cyclic inlet paths

4175551, F04B 4100

Patent

active

049156020

ABSTRACT:
The pump possesses an inlet and an outlet for the fluid to be pumped, a housing bounded at one end by an end member and enclosing an inner space, in which a piston is displaceably guide. The inlet is connected, by way of the end members and by way of a first back-pressure valve, with the pump chamber provided between the end member and the piston, said pump chamber being connected, by way of the end member and a second back-pressure valve, with the outlet. The piston is equipped with a third back-pressure valve, which additionally connects the inlet with the pump chamber, and makes it possible to largely prevent--during the suction strokes and particularly during the beginning phases thereof--any pressure drops from occurring, that could cause in the pump chamber the reconversion of fluid from the liquid to the gaseous state.

REFERENCES:
patent: 742940 (1903-11-01), Whitaker
patent: 2087663 (1937-07-01), Cardinal
patent: 3016717 (1962-01-01), Gottzmann
patent: 4239460 (1980-12-01), Golz
patent: 4412792 (1983-11-01), LaBorde et al.
patent: 4639197 (1987-01-01), Tornare et al.

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