US 7,157,654 B2 · Pressure switch with protection of the membrane against over-stretching

Abstract

A pressure switch for pressures up to a maximum permissible pressure (pmax), with a housing (1) and a membrane (2), whereby the membrane is fastened in the housing. The membrane has an exposed face on which a pressure can act, and it is deformed when a pressure acts upon it. The pressure switch comprises a means (4) that converts the membrane deformation into a stroke, as well as an electric contact system that interacts with this means. The means causes a membrane deformation to actuate the electric contact system. The pressure switch also comprises a cast solid abutment member (5) that completely fills a cavity between an inner wall of the housing and the face of the membrane opposite the exposed face when the membrane is exposed to the maximum permissible pressure pmax.

Claims9

Dependent claims

A pressure switch for pressures up to a maximum permissible pressure pmax, comprising the following:

a housing;
a membrane that is fastened in the housing and that has an exposed face on which a pressure p can act, whereby the membrane is deformed when the pressure p acts upon said membrane;
a means that converts the membrane deformation into a stroke;
and
a solid cast abutment member that completely fills a cavity defined between an inner wall of the housing, the face of the membrane opposite the exposed face, and said means in a condition when the membrane is exposed to the maximum permissible pressure pmax so as to form a stop surface against which the entire face of the membrane opposite the exposed face lies when the membrane is exposed to the maximum permissible pressure.

2 more elements

Dependencies are inferred from the claim text.

Pressure switch with protection of the membrane against over-stretching

Life of this patent

Pressure switch with protection of the membrane against over-stretching

Life of this patent

Abstract

Claims9