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:
Nov. 23, 1999
Filed:
Feb. 19, 1998
Klaus Koch, Dahlheim, DE;
Stabilus GmbH, , DE;
Abstract
A piston-cylinder unit includes a piston which divides the cylinder into two working chambers, a sealing valve seals a flow path between the two working chambers in the stationary operating condition of the unit. The sealing valve has a valve element consisting of an axially movable radially sealing sealing ring in conjunction with a valve ring, which at its back is supported by a spring-biased member. The slide member and the valve ring form therebetween a flow-off chamber having a flow-off opening that is sized so that unrestricted fluid flow is permitted so as to prevent the formation of a ram pressure in the flow-off chamber. The sealing ring is movable between three axial positions relative to the valve ring. At a center position, the sealing ring seals the flow path against fluid flow. At the two other positions, the sealing ring permits fluid flow in opposite directions.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile