Pressure measurement transducer with protective device

Details Pressure measurement transducer with protective device Pressure measurement transducer with protective device

2007-01-16

2008-10-14

Allen, Andre J (Department: 2855)

Measuring and testing

Fluid pressure gauge

Diaphragm

C073S726000, C073S720000

Reexamination Certificate

active

07434471

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.

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patent: 2004/0007073 (2004-01-01), Weise
patent: 2004/0007074 (2004-01-01), DiPaola et al.
patent: 2004/0007075 (2004-01-01), Ishiguro et al.

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