The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 24, 2001
Filed:
Dec. 22, 1999
Thorsten Seefried, Klingenberg, DE;
Joachim Gareus, Weilbach, DE;
Udo Hörning, Eichenbühl, DE;
Wika Alexander Wiegand GmbH & Co., Klingenberg/Main, DE;
Abstract
A membrane pressure sensor has a hollow space formed between a housing (,) and a cover (,), which is subdivided by two membranes (,) parallel to each other into a pressure sensing space (,) for impingement with a fluid with a pressure to be measured, into an air evacuation space between the membranes (,), and into a measurement fluid filled pressure output space (,) to forward the pressure to a pressure measurement arrangement (,), wherein the membranes (,) are made of a perfluoroalkoxy copolymer (PFA) and are designed shaped and congruent with the interposition of a plastic fiber insert (,). In this pressure sensor, the membrane (,) on the pressure sensing side is in direct contact with the cover (,), and an O-ring (,) is provided to seal the air evacuation space between the housing (,) and the cover (,). The housing (,) and cover (,) are made of a fluoropolymer. The pressure sensor is particularly suited for processes in which the entry a foreign metal ions into the test substance must absolutely be avoided.