Patent ID: 7984695

Claim:
A pet door comprising: a frame for installation in an opening created for this purpose in a door or wall so that an exterior side of the frame is located on an exterior side of the door or wall and the other interior side of the frame is located on an interior side of the door or wall, a first flap movably hinged on its top side to the exterior side of the frame so that the first flap opens away from the frame, a second flap movably hinged on its top side to the interior side of the frame so that the second flap opens away from the frame, a continuous, curved flange provided on three sides of the edge of each flap, each flange curved so that the outermost edge of the flange extends away from the frame to form a smooth outwardly curving surface for a pet to nuzzle to open the flap, and a weight secured to a movable part of each flap, said weight provided extending outward from each flap as an aid to closing the flaps tightly against the frame, each said weight located on the top of the flap near where the flap is movably hinged to the frame so that the weight exerts maximum downward force on the flap when the flap is closed against the frame and exerts less downward force on the flap when the flap is being opened.