Wika Alexander Wiegand Gmbh & Co.

Alexander Wiegand Gmbh Co.

Armaturenbau Gmbh

Heller, Heinz

Heinz Heller

Kurt Neubeck

Robert Schwagerl

Roland Waigand

The invention concerns a membrane for a pressure sensor. The membrane has, on a flat central face (,), an annular attachment face (,), which is disposed concentric to the central face (,), and a non-flat connecting face (,), which links the central face (,) with the edge face (,). The connecting face (,) is formed from at least one annular step (,), which consists of one flat annular face (,) and one truncated-cone-shaped step face (,), which connects radially inward to the annular face. The annular faces (,) and the central face (,) lie in planes parallel to each other, whereby the heights (h,, h,, h,) of the step faces (,) measured perpendicular to the plane of the central face are very small in relationship to the width of the respective step. This stepped design of the membrane results in a high linearity of the characteristic of the membrane pressure sensor and at the same time to a steep slope of the characteristic in its linear region.

Pressure sensor membrane having stepped annular peripheral surfaces and pressure sensor employing same

A membrane pressure sensor has an assembly comprising a thin membrane and a base, on which an annular joining face is formed. The membrane has a waved edge region in which numerous annular wave troughs and wave crests succeed one another alternatingly in the radial direction. The waved edge region of the membrane is attached to the joining face of the base. The wave crests of the edge region form numerous annular protrusions on the side turned away from the joining face, which permit a high sealing action when the assembly is connected with an annular flange having a measurement material space. When the joining face is flat, at least all wave troughs of the waved edge region of the membrane are circumferentially soldered to the joining face. When the joining face is provided with grooves complementary to the waves of the edge region, at least all wave crests of the waved edge region are soldered to the joining face and the waves of the edge region are stamped by pressing the initially flat edge region of a membrane blank against the grooved joining face such that this serves as a die during the stamping process.

Process for the production of an assembly of a membrane pressure sensor

A pressure guage connection for connecting a pressure sensing device such as a manometer or an electrical pressure detector to a pressurized vessel or conduit is disclosed. The connection element constitutes a cylindrical stem designed in one piece with the device carrier, with said cylindrical stem having a ring-type flange at its end. The ring-type flange places an attachment element to the cylindrical stem in an undetachable manner. The attachment element also has a deformation portion which is deformable in the radial direction after the placement onto the cylindrical stem, with a shoulder being formed as a result of the deformation and with the attachment element resting against the ring-type flange via this shoulder. The attachment element can be a clamping nut or a cap screw. A reinforcement seal is designed to be located at the end of the ring-type flange facing the pressurized vessel, with said reinforcement seal having a semi-circular, a semi-elliptical or a concavely bent cross section with a plane parallel, pressure-bearing surface area.

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Rippberg, Germany

Heinz Heller