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:
Oct. 08, 2002
Filed:
Feb. 07, 2001
Zhen Huang, Würzberg, DE;
Krupp Bilstein GmbH, Ennepetal, DE;
Abstract
A hydraulic vibration damper for motor vehicles comprising a cylinder ( ) containing damping fluid and a sealed, axially displaceable piston rod ( ) that plunges into said cylinder. A damping piston ( ) is secured to the lower end of the piston rod and divides the cylinder area into two working areas ( ). Said damping piston is provided with passages that can be modified and which are controlled by throttle valve bodies, in addition to a bypass for the pressure and traction stage, whereby the cross-section of the bypass is adjusted by an electrovalve that functions in three or more stages and the toroid coil more or less opens a valve slide ( ), whereupon two or more bypass openings are released in a successive manner. The inventive damper is designed in such a way disruptive influences caused by constantly changing hydraulic forces arising from the flow of the damping agent are reduced when the flow from the bypass channels is shifted or controlled. At least the first bypass channel ( ) that is released when the valve slide ( ) is in a closed position has a contraction ( ) that is 8J, located at a distance from the valve slide ( ).