Patent ID: 8904875
Filing Date: 2014-12-09
Classification: A47L,D06F

Abstract:
1. A pressure sensor comprising a casing and a deformable membrane accommodated in the casing so as to fluid-tightly divide the interior of the same into a first and a second chamber, the casing being provided with means for connecting the first chamber to the atmospheric environment and the second chamber, by means of a tube normally full of air, to a sump or collection tank of an operative fluid of an electric household appliance for detecting the level thereof according to a deformation of the membrane upon the establishment of a differential pressure in the two chambers; wherein the membrane carries a rigid disc at least on the side of the first chamber; characterized in that the rigid disc is operatively associated with a switch carried by the casing and adapted to be either closed or opened thereby upon the deformation of the membrane beyond a predetermined entity.