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:
Dec. 28, 2010
Filed:
May. 27, 2005
Jean-marc Chirpaz, Pollieu, FR;
Philippe Charvieux, La Tour du Pin, FR;
Christophe Gostomski, Virieu le Grand, FR;
Jean-Marc Chirpaz, Pollieu, FR;
Philippe Charvieux, La Tour du Pin, FR;
Christophe Gostomski, Virieu le Grand, FR;
Volvo Compact Equipment SAS, Belley, FR;
Abstract
The invention relates to a hydraulic circuit () for public works vehicles. The circuit comprises: a pump () which is driven by a heat engine () using a load sensing technique; a hydraulic motor () which is used to move one part of the vehicle () and a set of hydraulic actuators (-); at least one distributor () which supplies the hydraulic actuators (-) in a controlled manner; and a device () for cooling the fluid circulating through the circuit. The inventive circuit is characterised in that it comprises: a pressure-reducing device () which is connected to the outlet of the pump () and which delivers a first pressure level, said device () being connected to the feed port () of the hydraulic motor (); and an assembly which connects a check valve () and a calibrated orifice () in parallel, said assembly being connected downstream of the feed port () of the hydraulic motor and the return line () of the distributor () and upstream of the cooling device ().