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. 28, 2020
Filed:
Apr. 18, 2016
Thyssenkrupp Bilstein Gmbh, Ennepetal, DE;
Thyssenkrupp Ag, Essen, DE;
Dmitrij Smeljanskij, Leverkusen, DE;
THYSSENKRUPP BILSTEIN GMBH, Ennepetal, DE;
THYSSENKRUPP AG, Essen, DE;
Abstract
A controllable shock absorber may include a cylinder tube with hydraulic fluid, a movable piston that divides the cylinder tube into two working spaces, and a piston rod connected to the piston. Two fluid leadthroughs in the piston may connect the two working spaces. Valve assemblies for damping piston movement in actuating directions may be arranged on the leadthroughs. Each valve assembly may have a pilot control chamber and a valve plate movable between open and closed positions. The valve plate can be prestressed into the closed position by pressure loading the pilot control chamber. Pressures in the pilot control chambers can be set by a pilot control valve having a valve body that is movable between open and closed positions. An outflow cross section between the pilot control chambers and the working spaces is settable. First and second outflow paths may adjoin the valve body on the outflow side, the first outflow path being closed when an actuator for actuating the position of the valve body is inactive. A closing element separate from the valve body may be provided for closing the first outflow path.