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:
Oct. 29, 2002
Filed:
Oct. 18, 2000
Gerhard Huber, Frankenhofen, DE;
Hoerbiger Hydraulik GmbH, Schongau, DE;
Abstract
In an hydraulic operating arrangement the working chambers ( ) of a double-acting working cylinder ( ) are connected respectively by way of one reciprocally unlockable check valve ( ) with respectively one side of a reversible pressure medium source ( ). The respective working chamber ( ) under pressure is connected with a joint, controllable proportional pressure regulating valve ( ) for pressure control. On its exit side the proportional pressure regulating valve is connected with the pressure medium lines ( ) by way of respectively one check valve ( ) that opens in the direction of the pressure medium lines ( ), in particular between the corresponding unlockable check valves ( ) and the respectively belonging working chamber ( ) of the working cylinder ( ). This way the system pressure is easily controlled by way of the proportional pressure regulating valve, and the pressure medium that is directed away is returned from the exit side of the proportional pressure regulating valve ( ) directly to the pressure medium cycle and to the aspirating side of the working cylinder, thus making a simple apparatus and safe operation possible.