Pressure cooker interlock

Details Pressure cooker interlock Pressure cooker interlock

A - Human Necessities

47

J

65/21

A47J 27/08 (2006.01)

Patent

CA 1174478

Abstract A pressure cooker is disclosed having a safety interlock including a resilient gasket interposed between flat sealing surfaces of a receptacle and a cover, and configured to form a seal against the surfaces when they are spaced by a first distance, and to prevent formation of the seal when the surfaces are spaced by a second, smaller distance. The receptacle and cover are provided with interlocking lugs which are engageable in two differ- ent conditions to determine the first and second distances respectively. The gasket comprises an annular body having inwardly directed, axially diverging leg portions ter- minating in lip portions to seal against the sealing surfaces, and has faces with peripherally spaced bosses engageable by the sealing surfaces when at the second dis- tance to decrease the divergence of the leg portions and so prevent seal formation. Y-shaped, V-shaped, and W-shaped cross sections for the gasket are shown.

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