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. 23, 2008
Filed:
Dec. 08, 2004
Gerd Anton Thiry, Wadgassen, DE;
Alois Hoffmann, Saarbrücken, DE;
Harald Bär, Püttlingen, DE;
Hydac Fluidtechnik GmbH., Sulzbach/Saar, DE;
Abstract
A circuit arrangement includes a load sensing system (LS) with individual loads () arranged in series forming a series section, and in parallel forming a parallel section. A hydraulic supply circuit () includes a supply pump (P) and a runback () for fluid. The load sensing system (LS) determines the highest load pressure in the series section and the parallel section. The loads of the parallel section can be actuated independently from the pressure level of the loads of the series section due to the highest load pressure being transferred as a control pressure to a valve unit () such that, as long as the load pressure of the parallel section is higher than the load pressure of the series section, the valve unit restricts the runback () so that the pressure of the supply pump (P) matches or exceeds the pressure required in the parallel section. Sufficient fluid pressure for the load in the parallel section is ensured independently of the number of loads in the series section.