Pressure measurement transducer with protective device
US7434471B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 16, 2007 |
| Grant date | Oct 14, 2008 |
| Priority date | — |
| Expiry date | Jan 16, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L19/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A pressure measurement device with protection from long-term loads and pressure shocks. The novel device includes a diaphragm adapted to deform in response to a pressure applied thereto, and a retractable support adapted to support the diaphragm during periods of non-operation. A strain gauge is attached to the diaphragm for measuring the deformation and the retractable support is designed to minimize stress on the strain gauge during periods of non-operation. The support is retracted during periods of operation to allow the diaphragm and strain gauge to function normally in response to the applied pressure. The diaphragm is disposed within a housing to form a first cavity, which is coupled to media to be measured, and a second cavity, which is set at a reference pressure. In an illustrative embodiment, the retractable support is a threaded plug inserted into the second cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.