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:
Sep. 22, 1998
Filed:
Nov. 14, 1996
Klaus Schmidt, Bergisch Gladbach, DE;
August Bilstein GmbH & Co. KG, Ennepetal, DE;
Abstract
A proportional valve for a hydraulic dashpot with a piston and cylinder. The piston travels back and forth in the cylinder on the end of a rod, accommodates pressure-dependent valves for hydraulic fluid to travel back and forth through during both the compression and decompression phases, separates the interior of the cylinder into two dynamics chambers, accommodates channels that provide a route for the fluid that actuates the valves to flow through directly, and accommodates a series of bypass channels. The bypass channels accommodate an electromagnetically actuated bolt. The bolt slides back and forth in the bypass channels, regulating how much fluid can flow through them. The end of each valve facing away from the direct-route channels accommodates a compartment for generating pressure in. Each pressure-generation compartment communicates through the bypass channels with the dynamics chamber on the other side of the piston. The pressure-generation compartment is resiliently sealed off from its associated dynamics chamber. The pressure-generation compartment is demarcated by the valve's disk, by a component that resiliently seals it off from its associated dynamics chamber, by the areas of the piston wall that accommodate the entrances to the bypass channels, and/or by rings inserted into the piston. The resiliently sealing component in the pressure-generation compartment associated with the dynamics chamber at the other end is forced out of the way by the fluid in that dynamics chamber.