Patent ID: 9423041
Filing Date: 2016-08-23
CPC Classification: B65D,F16K,Y10T

Claim Text:
1. A valve connectable in fluid communication with a chamber, the valve comprising: a relatively rigid valve seat, a relatively flexible valve member overlying the valve seat and forming a normally-closed valve opening therebetween defining an inlet at one end of the valve seat, an outlet at an opposite end of the valve seat, and a seal therebetween that forms a hermetic, fluid-tight seal between the inlet and outlet of the normally-closed valve opening, and a valve body spaced relative to the valve member and forming a space therebetween, wherein the valve member is movable away from the valve seat into the space and toward the valve body in response to substance at the inlet to the valve opening exceeding a valve opening pressure to flow into the normally-closed valve opening, and wherein the valve is configured to define said valve opening pressure sufficiently high to one or more of until subjected to a predetermined negative pressure or vacuum pressure, whereby when the valve is subjected to a negative pressure or vacuum pressure up to said predetermined negative pressure or vacuum pressure; one or more of (i) a hermetic seal is maintained between the valve member and valve seat or (ii) the valve is prevented from opening.