The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 02, 1999
Filed:
Jun. 09, 1998
Christian Bayer, Armonk, NY (US);
Precision Valve Corporation, Yonkers, NY (US);
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.