Patent ID: 6978678

Claim:
A pressure sensor comprising a sensor element ( 2 ) including a substantially hollow-cylindrical ring ( 6 ) and a flat membrane ( 4 ) having an upper side ( 8 ) and a lower side ( 10 ), wherein the membrane ( 4 ) is fixedly connected to the ring ( 6 ) at its edge and is arranged in the area of the one basis ( 12 ) of the ring ( 6 ) so that the sensor element ( 2 ) has a central recess ( 20 ) starting out from the other basis ( 14 ) of the ring ( 6 ), the ground area of which recess is formed by the lower side ( 10 ) of the membrane ( 4 ) and the circumferential area of which is formed by the inner surface area ( 18 ) of the ring ( 6 ), a resistance arrangement consisting of electric resistors which are arranged on the upper side ( 8 ) of the membrane ( 4 ) such that the electric conductivity thereof varies when the membrane ( 4 ) is deformed, a casing ( 26 ) into which the sensor element ( 2 ) is inserted, a sleeve ( 54 ) which projects into the recess ( 20 ) and through which a pressure fluid can be guided into the recess ( 20 ) and to the lower side ( 10 ) of the membrane ( 4 ), an annular disk ( 56 ) which is arranged adjacent to the other basis ( 14 ) of the ring ( 6 ) of the sensor element ( 2 ) and is connected at its inner edge to the sleeve ( 54 ) and supports the same, a first elastomeric sealing ring ( 66 ) supported by the sleeve ( 54 ) and being tightly adjacent to the circumferential area of the recess ( 20 ), and a second elastomeric sealing ring ( 68 , 94 ) supported by the sleeve ( 54 ), wherein the pressure sensor is adapted to be mounted on a component part ( 72 ) having a feeding tube ( 74 ) for the pressure fluid and wherein the second sealing ring ( 68 , 94 ) serves for sealing at the feeding tube ( 74 ), characterized in that the disk ( 56 ) is attached to the casing ( 26 ) with its outer edge ( 58 ) and is fixedly connected to the sleeve ( 54 ).