Unloader valve for spray guns

Details Unloader valve for spray guns Unloader valve for spray guns

1974-07-18

1976-06-08

Schwadron, Martin P.

Fluid handling

Line condition change responsive valves

Pop valves

F16K 1704

Patent

active

RE0288420

ABSTRACT:
An unloader type valve for spray guns supplied from pumps to limit operating pressures of the pump when the spray gun is stopped. The valve utilizes an adjustable spring to select pressure forces for opening the valve and a variable flow passage from the valve to an outlet when the valve is open, the allowing matching of the valve to the precise operating pressures and flow rates in spray gun and pumping system installations.

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patent: 2597057 (1952-05-01), Berquist
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patent: 2807144 (1957-09-01), St. Clair
patent: 2874718 (1959-02-01), Kelly

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