Pressure difference sensor with protection against static overloads

US10101232B2 · kind B2 · utility

Assignee

• Endress+Hauser SE+Co. KG · DE

Inventors

• Anh Tuan Tham · Berlin, DE
• Peter Klofer · Steinen, DE
• Rafael Teipen · Berlin, DE
• Benjamin Lemke · Berlin, DE

Key dates

• Filing date: Mar 24, 2015
• Grant date: Oct 16, 2018
• Expiry date: Apr 29, 2035

Classification

• Technology area (CPC G): Physics
• CPC primary: G01L19/142
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A pressure difference sensor, comprising a pressure difference measuring cell having a measuring membrane, two platforms, between which the measuring membrane is arranged, and a transducer, as well as an elastic clamping apparatus, which has two clamping areas, each of which acts on a respective rear side of the platform facing away from the measuring membrane. The clamping apparatus has at least one elastic element, via which the clamping areas are mechanically coupled, in order to clamp the pressure difference measuring cell with an axial clamping force. The clamping areas are rigid, wherein the clamping apparatus comprises a clamp with two clamping bodies, each of which has one of the clamping areas. At least one of the clamping bodies has an elastic element, the clamping bodies are connected with one another under stress, in order to exert a clamping force on the pressure difference measuring cell, wherein the two clamping bodies have a central, form retaining section, which includes the clamping areas. On the form retaining section of at least one clamping body, especially both clamping bodies, elastic sections adjoin, which form the elastic elements.