Propellant filling and sealing valve, method of injecting propellant into a container and a container wall assembly including said valve.

摘要

A non-venting propellant filling and sealing valve (10) is seated in a propellant filling hole (14) in a bottom wall (11) of a container, and permits pressurization of a container through the hole and thereafter seals the container. The valve (10) includes an umbrella sealing portion (18), a stem portion (20) and shoulder portions (25a, 25b) in a collar (24) around the stem portion (20). The umbrella sealing portion is resilient and is adapted to separate from the interior surface (46) of the bottom wall (11) of the container during pressurization and then make a generally annular seal with this surface around the hole (14). The stem portion (20) positions the umbrella sealing portion (18) around the filling hole and both it and the collar (24) have axially extending grooves therein for con- - ducting pressurizing fluid to the interior of the container. The shoulder portions (25a, 25b) of the collar (24) bear against the outer surface (42) of the bottom wall (11) to prevent the valve (10) from being blown into the container during pressurization and cause the umbrella sealing portion (18) to engage the interior surface (46) of the bottom wall. When pressurization is completed, the source of fluid is removed and the pressure inside the container, being greater than ambient, causes the umbrella sealing portion (18) to form an annular, fluid- tight seal with the interior surface (46) around the filling hole (14).