Injector pump

Pumps – Motor driven – Fluid motor

Patent

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Details

92168, 417383, F04B 910

Patent

active

045940576

ABSTRACT:
An injector pump for introducing metered amounts of fluid into a process line which pump typically is actuated by a gas powered timing relay. A diaphragm or other impermeable member mounted in the pump housing defining a pump chamber for the fluid to be pumped and a piston chamber for a piston having a plunger sliding in a plunger guide to define a pressure chamber between the plunger and the diaphragm. A high pressure seal is carried in the plunger guide to provide sealing about the plunger when there is a high pressure in the pressure chamber, while permitting leakage along the plunger when there is a low pressure in the pressure chamber, thereby providing for pumping of measured amounts of fluid which may be under high pressure and/or highly corrosive, while maintaining isolation between the pump mechanism and the fluid.

REFERENCES:
patent: 1101266 (1914-06-01), Franklin
patent: 2377251 (1945-05-01), Le Clair
patent: 2856857 (1958-10-01), Saalfrank
patent: 2975599 (1961-03-01), Bennett
patent: 3149469 (1962-04-01), Williams
patent: 3738665 (1973-06-01), Bilco
patent: 4370996 (1983-02-01), Williams
Milton Roy brochure.
Morgan Products catalog, Pneumatic Chemical Injectors.
Williams Instrument Company, Inc. brochure, 1278-1c, 1980.
Bal Seal Engineering Company brochure, HP-1A.

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