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:
May. 14, 2002
Filed:
Sep. 08, 2000
Gerhard Huber, Frankenhofen, DE;
Hoerbiger Hydraulik GmbH, Schongau, DE;
Abstract
An apparatus for hydraulic actuation of a movable component on a vehicle, for example a trunk lid, a cover or the like, includes at least one double-action hydraulic working cylinder ( ) which is attached on one side to the vehicle and on the other side to the movable component, one of its working chambers ( ) being connected to a passive hydraulic accumulator ( ) and the other working chamber ( ) being connected to a hydraulic pump ( ), and a line branches off to a tank ( ) between the pump and the working cylinder and into which line there is a pressure relief valve inserted. In order to reduce especially in a simple and safe manner the danger of personal injury and damage to the vehicle or other objects, there is a check valve ( ) blocking in the direction of the pump ( ), which is inserted between the pump ( ) and the working cylinder ( ), and there branches off a line leading to the tank ( ) between the check valve ( ) and the working cylinder ( ), and in which line there is an electrically-controllable proportional pressure valve ( ) inserted as a pressure relief valve.