Fluid sprinkling – spraying – and diffusing – With system fluid relief or return to supply
Patent
1983-01-11
1985-01-22
Love, John J.
Fluid sprinkling, spraying, and diffusing
With system fluid relief or return to supply
239455, 137312, B05B 132
Patent
active
044946970
ABSTRACT:
An improved control valve is provided which is utilized in spray guns and like devices for hydraulically atomizing and spraying liquids such as paint wherein the spray control valve functions as the spray tip, the spray control valve being mounted in a housing attached to the spray gun handle and includes a fluid bore communicating with the pressurized liquid supplied to the spray gun, a valve bore intersecting the fluid bore and substantially transverse thereto, and a spray opening substantially aligned with said fluid bore and intersected by said valve bore, the spray gun further includes a valve pin moveable in said valve bore and normally biased to obstruct the spray opening, and a trigger means for moving the valve pin against the biasing action to unobstruct the spray opening and define the extent thereof. The improvement in the spray control valve comprises exposing a circumferential segment of the valve bore to the atmosphere by means of a relief bore formed in the spray control valve intersecting the valve bore, the relief bore having a diameter greater than the valve bore so that a circumferential segment of the valve bore is thereby exposed to the atmosphere to thereby relieve the pressure of any liquid material which infiltrates into the valve bore between the wall thereof and the valve pin.
REFERENCES:
patent: 3354897 (1967-11-01), Koch et al.
patent: 4269355 (1981-05-01), Geberth
patent: 4346841 (1982-08-01), Fenne
patent: 4389017 (1983-06-01), Geberth
Edelbrock Daniel R.
Love John J.
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