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:
Apr. 17, 2001
Filed:
May. 21, 1999
Bernhard Hollerbach, Steingaden, DE;
Hoerbiger Hydraulik GmbH, Schongau, DE;
Abstract
An arrangement for hydraulically operating a rear cover, covering top or the like (,) on a vehicle, with at least one double-acting hydraulic working cylinder (,), which, on the one hand, is connected to the vehicle and, on the other hand, to the covering top wherein its working chambers (,) are in connection with each one side of a switched pressure source (,) via one check valve (,) each, wherein both of the check valves have an mutually releasing device and each of the working chambers parallel with respect to the check valves is kept via a pre-stress valve (,), which steers into the tank, at a specified pressure level. To make possible, in a simple and safe way, an emergency operation of the covering top (,) also in the common working cylinders having different volumes of the working chambers (,) on the side of the piston and valve stem, between at least one working chamber (,) and the corresponding releasable check valve (,), a separate after-suction line (,) enters which leads to the tank (,) and in which a check valve (,) is inserted which is open in the direction of the working chamber (,).