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. 31, 2015
Filed:
Jul. 27, 2012
Applicants:
Masahiro Ashiba, Naka-gun, JP;
Tadashi Yoshida, Ebina, JP;
Inventors:
Masahiro Ashiba, Naka-gun, JP;
Tadashi Yoshida, Ebina, JP;
Assignee:
Hitachi Automotive Systems, Ltd., Hitachinaka-Shi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16F 9/56 (2006.01); F16F 1/18 (2006.01); F16F 9/348 (2006.01);
U.S. Cl.
CPC ...
F16F 9/3485 (2013.01);
Abstract
A cylinder apparatus includes a flow path which is provided in a valve member and through which a fluid circulates when a rod is moved; a disk valve which opens and closes the flow path; and a spring member which presses the disk valve in an axial direction. The spring member includes a first spring which comes into contact with the disk valve in a state in which the disk valve closes the flow path, and a second spring which comes into contact with the disk valve in a state in which the disk valve opens the flow path.