Integral pump and check valve apparatus

Details Integral pump and check valve apparatus Integral pump and check valve apparatus

1990-04-09

1991-05-21

Smith, Leonard E.

Pumps

Motor driven

Electric or magnetic motor

417454, 417571, 137903, F04B 4304

Patent

active

050171003

ABSTRACT:
A combined and integral pump and check valve combination is disclosed herein for the control of fluid flow through a fluid pump portion having an inlet port leading to a gland cavity occupied by a movable sealing element yieldably held in position closing or sealing the inlet port by a self-biasing member such as an open-cell foam material. A retaining ring used during the assembly procedure is disposed between the edge marginal regions of the self-biasing member and the movable sealing element which may function to stabilize the element. A sealed retaining plate is attached to the pump supporting the self-biasing member and the movable element combination and further defines an outlet port or duct on the side of the movable element opposite to its side which is adjacent to the inlet port.

REFERENCES:
patent: 2471796 (1949-05-01), Thiberg
patent: 2575398 (1951-11-01), Schroeder
patent: 3192949 (1965-07-01), DeGee
patent: 3399677 (1968-09-01), Gould et al.
patent: 3467020 (1969-09-01), Russell
patent: 3545897 (1970-12-01), Russell
patent: 3900276 (1975-08-01), Dilworth
patent: 4137016 (1979-01-01), Itakura
patent: 4162876 (1979-07-01), Kolfertz
patent: 4594058 (1986-06-01), Fischell
patent: 4762470 (1988-08-01), Wang

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