Pressure sensor

Details Pressure sensor Pressure sensor

2005-12-27

2005-12-27

Lefkowitz, Edward (Department: 2855)

Measuring and testing

Fluid pressure gauge

Diaphragm

C073S727000

Reexamination Certificate

active

06978678

ABSTRACT:
The invention relates to a pressure sensor comprising a sensor element (2) having a flat membrane (4) which is transformed at its edge into a hollow-cylindrical ring (6) so that a central recess (20) is provided at the lower side (10) of the membrane (4). On the upper side (8) of the membrane (4) a resistance arrangement consisting of electric resistors is disposed. A sleeve (54) projects into the recess (20) and supports a first elastomeric sealing ring (66) which is tightly arranged at the circumferential area of the recess (20). Furthermore the sleeve (54) supports a second elastomeric sealing ring (68) which serves for sealing at a feeding tube for pressure fluid formed in a component part to which the pressure sensor is mountable. The sleeve (54) is rigidly connected to a disk (56) which is attached with its outer edge (58) to a casing (26) enclosing the sensor element (2). Mechanical forces occurring during and after assembly of the pressure sensor to the component part are introduced into the casing (26) via the sleeve (54) and the disk (56) so that the sensor element (2) is kept free from mechanical distortions which might entail an undesired deformation of the membrane (4) and consequently a falsification of the measuring signal.

REFERENCES:
patent: 4412203 (1983-10-01), Kurtz et al.
patent: 6508130 (2003-01-01), Werner et al.
patent: 6715356 (2004-04-01), Gerst et al.
patent: 6848318 (2005-02-01), Gerst et al.
patent: 4008156 (1991-09-01), None
patent: 0372773 (1990-06-01), None
patent: G8908951.0 (1989-07-01), None

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