Switching valve assembly for fluid motor-driven injector pump

Details Switching valve assembly for fluid motor-driven injector pump Switching valve assembly for fluid motor-driven injector pump

1977-06-09

1979-07-17

Croyle, Carlton R.

Valves and valve actuation

Mechanical movement actuator

With pivoted valves

251303, 251339, 91306, 91336, 91337, 417403, F16K 116, F01L 2502, F04B 1700, F04B 3500

Patent

active

041613082

ABSTRACT:
A pump for injecting metered amounts of liquid into a line or a conduit, which includes a reciprocating pumping piston in a cylindrical chamber having an inlet and an outlet, both of which are controlled by check valves, wherein the pumping piston is driven by a pneumatic motor of the reciprocating type and having a cylinder in which is located a power piston that is suitably connected to the pumping piston. A switching valve assembly is provided for controlling a supply of power gas or air to the pneumatic motor and which responds to the movement of the pumping and power pistons for effecting reciprocal movement of the pistons.

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