Patent ID: 6817494
Filing Date: 2004-11-16
Classification: F16K

Abstract:
A valve assembly for fluid container under pressure, comprising a valve cup sealingly attachable to an opening of the container, the valve cup having an opening, a valve body of plastic material attached within the cup opening and having a through going axial passage and a sealing surface, a valve piston of plastic material guided within the passage, co-acting with the sealing surface and having a lower portion, a cap connected to the valve body designed to allow flow or fluid from the exterior of the cap to the interior thereof, the can having a bottom portion, a preferably axial bottom projection being formed to the bottom portion upwardly towards the valve body, the bottom projection telescopically co-acting with the lower portion of the valve piston, the lower portion of the valve body having finger-shaved spring portions and the bottom projection engaging the space between said finger-shaped spring portions, wherein upon actuation inner ends of the finger-shaped spring portions slide along an outer surface of the bottom projection to generate a spring force by which the piston is pressed against the sealing surface.