Patent ID: 8247751

Claim:
A microwave pressure cooker formed with a container open at its top comprising the following: (a) a cover with a gasket adapted for ledge interlock type sealing and lug locking engagement with said container to form an enclosure for pressure cooking with the container; (b) a first and a second regulator opening means forming valve openings through said cover; (c) a primary deformable diaphragm type pressure regulator means with slits formed therein adapted to be disposed on the first regulator opening means, and which is responsive to the pressure in the enclosure; (d) a secondary deformable pressure indicator cum regulator means adapted to be disposed on the second regulator opening means formed on the cover and which is responsive to pressure in the enclosure; (e) a push rod type gasket offset device means mounted on locking lug and an opening and closing aid of cover for releasably maintaining said container and the cover in said sealing engagement responsive to disposition of gasket on the cover and the movement of said gasketed cover relative to said container to a lock position; and (f) a filter adapted to be disposed removably on the first regulator opening means, wherein said primary pressure regulator means is a pressure responsive diaphragm, characterized in the non-metallic deformable microwave permeable diaphragm type pressure regulator means, the diaphragm adapted to be disposed on the cover of the cooker, said diaphragm having a slit made thereon and which diaphragm responds when encountering a pressure increase within the container to change the slit into an open configuration responsive to pressure development within the closed cooker enclosure, when the pressure is greater than a selected nominal working pressure of the cooker, said diaphragm further characterized in that it is generally a flat disc shaped pressure responsive member, adapted to be disposed in the hole of the receptacle type regulator opening means formed on the cover of the cooker, said disc portion including an outer cooperating upwardly and downwardly extending peripheral protuberances as gripping means that engage fittingly a portion around the regulator opening means at the opposed sides of the opening hole respectively.