Two-stage volumetric pump for liquefied petroleum gases in liqui

Details Two-stage volumetric pump for liquefied petroleum gases in liqui Two-stage volumetric pump for liquefied petroleum gases in liqui

1984-09-21

1986-01-21

Husar, Cornelius J.

Pumps

Successive stages

Reciprocating rigid stages

417383, 417534, 92 48, 92101, F04B 2504, F04B 1100

Patent

active

045655014

ABSTRACT:
A two-stage pump for LPG having two chambers, a valve communicating with the first chamber for the admission of the liquid to be pumped; a second valve communicating with the second chamber for the delivery of the pumped liquid. A transfer duct connects the two chambers and is fitted with a check valve to prevent the return of liquid from the second chamber to the first. Each chamber comprises a wall formed by a diaphragm freely deformable in such direction as to increase the volume of the chamber under the effect of the pressure of the liquid, and operably deformable in the opposite direction under the action of actuating means acting alternately on the diaphragms of both chambers. The floating diaphragms prevent the vaporization of the liquid that would arise with a suction pump, as well as the cavitation that would ensue.

REFERENCES:
patent: 862867 (1907-08-01), Eggleston
patent: 2584552 (1952-02-01), Neufeld
patent: 2621594 (1952-12-01), Katcher
patent: 2752854 (1956-07-01), Prior et al.
patent: 2778541 (1957-01-01), Sherdondy
patent: 2869585 (1959-01-01), Baker
patent: 2919652 (1960-01-01), Fay
patent: 3782863 (1974-01-01), Rupp
patent: 4021157 (1977-05-01), Elderfield
patent: 4172698 (1979-10-01), Hinz et al.
patent: 4382750 (1983-05-01), Robertson et al.

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