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:
Nov. 16, 1999
Filed:
Dec. 19, 1997
Heinz Heller, Walldurn-Rippberg, DE;
WIKA Alexander Wiegand GmbH & Co., Klingenberg, DE;
Abstract
A membrane pressure sensor has an assembly comprising a thin membrane and a base, on which an annular joining face is formed. The membrane has a waved edge region in which numerous annular wave troughs and wave crests succeed one another alternatingly in the radial direction. The waved edge region of the membrane is attached to the joining face of the base. The wave crests of the edge region form numerous annular protrusions on the side turned away from the joining face, which permit a high sealing action when the assembly is connected with an annular flange having a measurement material space. When the joining face is flat, at least all wave troughs of the waved edge region of the membrane are circumferentially soldered to the joining face. When the joining face is provided with grooves complementary to the waves of the edge region, at least all wave crests of the waved edge region are soldered to the joining face and the waves of the edge region are stamped by pressing the initially flat edge region of a membrane blank against the grooved joining face such that this serves as a die during the stamping process.