Patent ID: 7174918

Claim:
A valve for opening and closing an air outlet opening in a housing defined by a continuous perimeter edge, comprising, a continuous sealing panel having a shape substantially matching the air outlet opening and capable of being moved in a defined linear path against and away from the outlet opening's perimeter edge, a support member comprising a pair of parallel stanchions on the rear of said panel and having a cam slot therein, a guide frame fixed within said housing to support said sealing panel and support member for guided movement along said liner path, said guide frame includes a pair of parallel channels in which said stanchions slide, a rotary shaft located behind said panel and oriented substantially perpendicular to said linear path, and, a rotary cam on said rotary shaft operable within said support member cam slot to move said support member within said guide frame along said linear path against and away from the perimeter edge defining said air outlet opening.