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. 07, 2000
Filed:
Jul. 20, 1998
Robert Pradel, Rothlein, DE;
Gerald Fenn, Poppenhausen, DE;
Mannesmann Sachs AG, Schweinfurt, DE;
Abstract
A piston-cylinder unit for a hydropneumatic suspension system of a vehicle having a fluid-filled cylinder in which a piston having damping valves and connected to a piston rod is axially movable. The piston rod runs axially in a piston rod guide at the piston-rod exit of the cylinder and is sealed toward the outside by means of a piston rod seal. A spring surrounding the piston rod is in mounted between a first support part attached to the cylinder and a second support part attached to either the piston rod or a vehicle-fixed part. The spring, which interacts with an axially adjustable support part, can be lifted off one of the support parts. During compression of the piston-cylinder unit, the first and second support parts begin compression of the spring at the functional point of the compression. The functional point is adjustable in a predetermined position range by an adjustment device.