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. 06, 2023
Filed:
Jan. 07, 2022
Hitachi Astemo, Ltd., Ibaraki, JP;
Shunsuke Mori, Yokohama, JP;
Hiroshi Murakami, Ebina, JP;
HITACHI ASTEMO, LTD., Ibaraki, JP;
Abstract
A damping force adjustable shock absorber in2cludes an electromagnetic damping force adjustment device () having a damping force adjustment valve (), and a solenoid () configured to variably adjust the damping force. The solenoid includes a coil () configured to generate a magnetic force by power supply, a movable iron core () located on an inner peripheral side of the coil, an anchor member () configured to attract the movable iron core. The movable iron core includes a thick cylindrical portion (A) and a taper cylindrical portion (B). The thick cylindrical portion includes a fixation hole (A) in which a shaft portion () is fixed. The taper cylindrical portion has an inner peripheral surface flaring so as to define a taper shape. A recessed portion (A) is formed around the fixation hole. The recessed portion allows hydraulic fluid to flow in an axial direction of the movable iron core.