Aerosol powder valve

B - Operations – Transporting – 65 – D

Patent

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Details

B65D 83/16 (2006.01) B65D 83/14 (2006.01)

Patent

CA 2334593

An aerosol powder valve (10) has a valve housing (18), a valve body (21) with an upstanding valve stem (22), radial stem orifices (23), and an annular tightfitting gasket (25) with a central opening (48) 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 (40) spaced around its periphery, the top spline surfaces (41) being of minimal area relative to the spaces between the spline tops (44). The spline top surfaces abut the gasket when the valve is closed, and the minimal top spline areas prevent powder build up to adversely affect full sealing of the valve. 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.

L'invention concerne une valve à poudre en aérosol (10) possédant un logement de valve (18), un corps de valve (21) à tige de valve debout (22), des orifices radiaux (23) dans la tige et un joint statique annulaire (25) à ajustement serré présentant une ouverture centrale (48), formant la seule fermeture étanche pour les orifices de la tige. La tige de valve comporte des bords francs au-dessus et au-dessous de ses orifices et se caractérise par l'absence d'une rainure de réception de joint statique l'entourant. Le corps de valve possède plusieurs languettes étroites (40) espacées sur sa périphérie, les surfaces supérieures (41) des languettes présentant une surface minimale par rapport aux espaces entre les sommets (44) des languettes. Les surfaces supérieure des languettes viennent buter contre le joint lorsque la valve est fermée, et la surface supérieure minimale des languettes empêche l'accumulation de poudre qui pourrait nuire à l'étanchéité optimale de la valve. La surface d'étanchéité du joint, entourant la tige de valve, est recouverte de lubrifiant cuit, tel que du silicone. Les orifices de la tige sont positionnés verticalement sur les espaces circonférentiels entre les languettes.

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