Patent ID: 9399544
Filing Date: 2016-07-26
CPC Classification: B65D

Claim Text:
1. A valve for a pressurized dispensing container suitable for dispensing a polyurethane foam, comprising: (a) A valve cup comprising a substantially planar central portion, and a peripheral edge suitable for sealingly fixing the cup to the top opening of a container and thus tightly closing the container, said cup being made of a thin plate comprising a first, inner surface and a second, outer surface, wherein the central portion comprises a through opening surrounded by a first triangular annular fold of diameter, D, forming a groove in the first, inner surface and a rib in the second, outer surface of the substantially planar central portion; wherein the portion of the valve cup having a diameter less than D extends a distance further along a vertical axis away from the peripheral edge than the portion of the valve cup having a diameter greater than D; (b) A resilient grommet extending on both sides of the cup through the cup opening, said grommet having a hollow tubular portion defining a central bore, and at a first end facing the interior of the container it comprises an annular flange portion of diameter greater than D, which upper surface seals against the first, inner surface of the cup's substantially planar central portion, (c) A valve stem comprising a hollow tubular portion defining a central bore, said valve stem snugly fitting in the grommet central bore, and extending on both sides of the grommet, with a first end opening to ambient and a second, opposite end being closed by a circular end base of diameter greater than the diameter of the bore of the grommet, wherein the upper surface of the base is suitable for sealing against the lower surface of the grommet flange; wherein the upper surface of the flange portion of the grommet mates the geometry of the first, inner surface of the cup's substantially planar central portion including a triangular portion of the grommet mating the groove formed by the triangular fold and wherein the grommet is made of neoprene or preferably of a thermoplastic elastomer.