Patent ID: 7137405

Claim:
A valve, comprising: a carrier body having a first aperture sized to allow media to pass there through; a valve movably coupled to the carrier body, the valve including a valve body having a second aperture and a flexible membrane disposed over the second aperture, the flexible membrane adapted to respond to a back pressure by flexibly engaging the first aperture to create a seal with the first aperture; the first aperture has a first diameter and the second aperture has a second diameter, and the first diameter is less than or equal to the second diameter such that the flexible membrane will engage an inner edge of the first aperture when back pressure is applied against the flexible membrane; the carrier body includes a raised seat that surrounds the first aperture and is adapted for engagement with the flexible membrane; the valve is movably coupled to the carrier body by a hinge at a hinge point; the hinge is adapted to allow for valve movement in addition to pivoting movement; and wherein the hinge includes a pin, a first at least one lobe and a second at least one lobe, the first and second at least one lobes including an aperture for receiving the pin, and the aperture of the first at least one lobe being oversized to allow movement of the valve at the hinge point.