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:
Mar. 13, 1984
Filed:
Nov. 09, 1981
Applicant:
Inventor:
Hubert Choffat, Bole, CH;
Assignee:
Centre Electronique Horloger S.A., Neuchatel, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01L / ;
U.S. Cl.
CPC ...
73702 ;
Abstract
44A pressure transducer which uses the principle of a variation in the resonance frequency of a membrane when it is subjected to a variable pressure. The transducer comprises a vibrating membrane which is fixed on a support member forming a cavity, and a cover member forming a second cavity. Excitation of the membrane is facilitated since it is made of a piezoelectric material and is provided with electrodes. An object of the invention is to provide a digital output pressure transducer which can be minaturized and which has low power consumption.