Patent ID: 7302962

Claim:
A pressure relief valve for relieving air pressure from a passenger compartment of a vehicle, the pressure relief valve comprising: a base having a peripheral portion, a central opening extending through the base; and a plurality of flaps for closing the central opening of the base, each flap having an outer end connected with the peripheral portion of the base and an inner end that is movable relative to the peripheral portion and the other flaps for enabling airflow through the central opening; each flap having opposite surfaces against which air pressure acts, differential air pressure acting on the opposite surfaces causing the flap to move about a hinge to enable airflow through the central opening, the hinge comprising a narrow portion of material formed between slots in the flap, the plurality of flaps being formed in a single sheet of flexible material, the outer ends of the plurality of flaps being interconnected to collectively form an undivided outer periphery of the sheet of flexible material, the inner ends of the plurality of flaps forming a central portion of the sheet of flexible material and being movable relative to the outer periphery.