Valve control system for air powered vacuum pump

Details Valve control system for air powered vacuum pump Valve control system for air powered vacuum pump

1976-12-28

1978-07-25

Croyle, Carlton R.

Pumps

Motor driven

Fluid motor

417402, 91318, 91321, 91337, 91341R, 91426, F04B 1700, F04B 3500, F01B 718, F01L 3300

Patent

active

041026098

ABSTRACT:
A source of fluid, regulated as to pressure intensity before entry into a control valve assembly, drives a fluid biased piston motor. A mechanically actuated and fluid held valve in the control valve assembly controls pressurization of a pressure chamber in the piston motor displacing the motor piston through its return stroke. Pressure differential on opposite sides of a fluid operated valve actuator insures rapid opening of the valve and holding thereof in its open position during the motor piston return stroke. At the end of the return stroke, the pressure differential is eliminated to allow spring-biased closing of the valve and venting of the pressure chamber.

REFERENCES:
patent: 2964013 (1960-12-01), Mitchell et al.
patent: 3035676 (1962-05-01), Nallinger
patent: 3216158 (1965-11-01), Kelsey
patent: 3268271 (1966-08-01), Yackle
patent: 3299826 (1967-01-01), Williams
patent: 3387563 (1968-06-01), Williams et al.

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