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. 19, 1994
Filed:
Nov. 08, 1991
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A pressure sensor in which a magnetostriction effect of an amorphous magnetic alloy is utilized. It is an object of the invention to suppress the thermal sensitivity change of the pressure sensor and to improve the lineality and the hysteresis of sensor output. The pressure sensor comprises a cylindrical columnar hollow body with a pressure introducing opening, a deforming part of which body is distorted by a pressure introduced from the pressure introducing opening, the deforming part being a peripheral wall of the body, and a thin film made of an amorphous magnetic alloy having a magnetostriction property which is fitted around and bonded to the deforming part, wherein the film, which is curved to have a cylindrical shape and annealed before it is provided around the cylindrical columnar deforming part, has a curvature different from a curvature of the cylindrical columnar deforming part.