Patent ID: 6334551
Filing Date: 2002-01-01
Classification: B05B,B65D

Abstract:
A container comprising a body member for containing liquid and a neck at one end thereof through which liquid flows on pressurization of the interior of the body member, and a closure for the body member including a cap located on the neck of the body member and having an outlet therein for dispensing therethrough liquid flowing through the neck of the body member a control valve located within the cap for controlling the dispensing of liquid flowing from the body member to the outlet from the cap, the control valve being a one piece plastic moulding including a diaphragm portion and a nose portion extending from one side of said diaphragm portion, and having a rest position in which the nose portion engages in, to seal, the outlet from the cap, and a one-way valve in the flow path of liquid from the body member to the outlet and communicating with the atmosphere said one-way valve having a closed position sealing the interior of the container from the atmosphere and an open position interconnecting the interior of the container with the atmosphere the arrangement being such that, on pressurization of the interior of the body member, liquid from the body member flows through the neck of the body member into the cap to close the one-way valve and to engage with the one side of the diaphragm portion of the control valve to distort said diaphragm portion whereby the nose portion of the control valve is displaced from the outlet and liquid is dispensed therethrough, and, on subsequent release of pressure from the interior of the body member, the control valve returns, under the influence of its inherent resiliency and atmospheric pressure, to its rest position with the nose portion thereof seating in, to seal, the outlet, and the one-way valve opens to facilitate re-pressurization of the interior of the body member, characterized in that the cap includes an annular seating for the control valve projecting inwardly of the cap and being of hollow, open-ended generally cylindrical shape the bore through which interconnects the interior of the cap with the atmosphere, the control valve being mounted on the seating with the diaphragm portion thereof sealing the inner end of the seating and whereby the other side of the diaphragm portion remote from the nose portion is subjected to atmospheric pressure.