Patent ID: 7419069
Filing Date: 2008-09-02
Classification: B65D,Y10T

Abstract:
1. A device of a valve for a drinking receptacle having an internal pressure, in which the valve is provided in an enclosure, a downstream end thereof being provided with a drinking opening, and an upstream end thereof being open and attached around an opening in the drinking receptacle when in position of use, whereby the valve may open and close to liquid outflow from the drinking receptacle via said drinking opening, which is provided downstream of the valve; in which the valve comprises: a flexible membrane body provided with an attachment end fixedly connected to the enclosure when in position of use, and a free manoeuvre end pressure-sealingly and movably connected to the enclosure; a valve head; and a valve seat against which the valve head seals when the valve is inactive and in its position of rest; in which the enclosure also contains: a pressure balancing chamber communicating with an ambient pressure of the enclosure and one side of the membrane body; and a suction chamber communicating with said downstream drinking opening and the other side of the membrane body; in which the valve is arranged to open to said liquid outflow when the suction chamber, via said downstream drinking opening, is supplied an underpressure which is less than said ambient pressure by a predetermined value, whereby the membrane body is exposed to a pressure difference that activates and moves the membrane body with a valve-opening force, characterized in that the valve head is fixedly and by-passably connected to the enclosure; wherein the valve seat is connected to the manoeuvre end of the membrane body; wherein the valve seat is provided upstream of the valve head; and wherein the valve seat is pressure-sealingly and movably connected to the enclosure; whereby the valve seat may be moved away from the valve head and open the valve to liquid outflow when the suction chamber is supplied said underpressure.