Patent ID: 8910833

Claim:
A valve connectable in fluid communication with a fluid-receiving chamber and forming a substantially fluid-tight seal therebetween, 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 fluid-tight seal between the inlet and outlet of the normally-closed valve opening, a valve body spaced relative to the valve member and forming a space therebetween, and a seal engageable with the fluid-receiving chamber and forming a substantially fluid-tight seal therebetween to seal the valve outlet and fluid-receiving chamber with respect to ambient atmosphere, wherein the valve member is movable away from the valve seat in response to substance at the inlet to the valve opening exceeding a valve opening pressure to flow into the normally closed valve opening, through the outlet, and into the fluid-receiving chamber.