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:
Apr. 03, 2001
Filed:
Dec. 15, 1997
Wika Alexander Wiegand GmbH & Co., Klingenberg, DE;
Abstract
The invention concerns a membrane for a pressure sensor. The membrane has, on a flat central face (,), an annular attachment face (,), which is disposed concentric to the central face (,), and a non-flat connecting face (,), which links the central face (,) with the edge face (,). The connecting face (,) is formed from at least one annular step (,), which consists of one flat annular face (,) and one truncated-cone-shaped step face (,), which connects radially inward to the annular face. The annular faces (,) and the central face (,) lie in planes parallel to each other, whereby the heights (h,, h,, h,) of the step faces (,) measured perpendicular to the plane of the central face are very small in relationship to the width of the respective step. This stepped design of the membrane results in a high linearity of the characteristic of the membrane pressure sensor and at the same time to a steep slope of the characteristic in its linear region.