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:
Dec. 18, 2007
Filed:
Jan. 26, 2006
Donald E. Harasyn, Eden Prairie, MN (US);
Charles R. Willcox, Eden Prairie, MN (US);
Andrew J. Klosinski, Chaska, MN (US);
Donald E. Harasyn, Eden Prairie, MN (US);
Charles R. Willcox, Eden Prairie, MN (US);
Andrew J. Klosinski, Chaska, MN (US);
Rosemount Inc., Eden Prairie, MN (US);
Abstract
A diagnostic system for a pressure sensor having a cavity configured to receive on applied pressure is provided. The cavity has a first and a second wall. A deflectable diaphragm is positioned in the cavity and configured to form a first and a second capacitance with the first wall and a third and a fourth capacitance with the second wall which change in response to the applied pressure. The capacitances form a first transfer function and a second transfer function. Changes in the first transfer function relative to the second transfer function are detected to provide a diagnostic output.