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:
Jun. 24, 2003
Filed:
Jan. 12, 2001
Jean-Pierre Lebrun, Monceaux, FR;
Poclain Hydraulics Industrie, Verberie, FR;
Abstract
A valve device ( ) for at least one hydraulic motor suitable for driving a mass of large inertia. The device includes first and second ducts ( ) serving to be connected to respective ones of the two main ducts (feed or discharge) of the motor, and an auxiliary duct ( ) connected, for example, to a booster duct. The device can have two configurations, depending on which of the main ducts has the higher pressure, in which configurations the main duct at high pressure is isolated, while the main duct at low pressure is connected to the auxiliary duct. The device includes time delay means ( ) suitable for limiting the speed of transition between one and the other of the first and second configurations when the difference between the pressures in the first and second main ducts ( ) changes sign.