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:
Jun. 12, 2018
Filed:
Mar. 25, 2015
Applicant:
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, Ibaraki, JP;
Inventors:
Masahide Hayashi, Ibaraki, JP;
Heewon Jeong, Tokyo, JP;
Assignee:
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01P 15/125 (2006.01); G01P 15/08 (2006.01);
U.S. Cl.
CPC ...
G01P 15/125 (2013.01); G01P 2015/0834 (2013.01);
Abstract
Provided is a highly reliable acceleration sensor that keeps production costs low and has low zero point drift initially and over time even when used in a poor installation environment. In this acceleration sensor, a weight that rotates when acceleration is applied in the z-direction is disposed in a cavity surrounded by a support substrate and a cap layer. The cap layer is formed such that both sides thereof across the axis of rotation of the weight have different masses per unit area.