Dispensing – With discharge assistant – Fluid pressure
Patent
1998-06-09
1999-11-02
Bomberg, Kenneth
Dispensing
With discharge assistant
Fluid pressure
B65D 8316
Patent
active
059753781
ABSTRACT:
An aerosol powder valve has a valve housing, a valve body with an upstanding valve stem, radial stem orifices, and an annular tight-fitting gasket with a central opening forming the sole seal for the stem orifices. The valve stem is straight-sided above and below the stem orifices and is characterized by the absence of a gasket-receiving groove encircling the stem. The valve body has a plurality of narrow splines spaced around its periphery, the top spline surfaces being of minimal area in relation to the area of the circumferential spaces between the tops of the splines. The spline top surfaces abut the gasket underside when the valve is closed, and the minimal top spline areas prevent powder build-up to adversely affect full sealing of the valve. Other lateral surfaces on the valve body near the gasket are eliminated to likewise avoid powder build-up thereon. The spline sides may diverge outwardly and downwardly from the spline top surfaces. The gasket sealing surface surrounding the valve stem has a lubricant, i.e., silicone, baked thereon. The stem orifices are positioned vertically over circumferential spaces between splines.
REFERENCES:
patent: 3160182 (1964-12-01), Odonnell
patent: 3174692 (1965-03-01), Green
patent: 3187963 (1965-06-01), Anderson
patent: 3773064 (1973-11-01), Focht
Bomberg Kenneth
Precision Valve Corporation
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