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:
Aug. 09, 2005
Filed:
Dec. 20, 2001
Louis Bigo, Compiegne, FR;
Daniel Ruzicka, Nogent-sur-Oise, FR;
Bernard Allart, Crepy-en-Valois, FR;
Louis Bigo, Compiegne, FR;
Daniel Ruzicka, Nogent-sur-Oise, FR;
Bernard Allart, Crepy-en-Valois, FR;
Poclain Hydraulics Industrie, Verberie, FR;
Abstract
Hydraulic motor drive apparatus having a cubic capacity selector () which has at least two positions, control means for controlling the selector, which means comprise a hydraulic control chamber () suitable for being fed with fluid via a control duct (), and first opposing return means (). The apparatus further comprises a brake system having a brake release chamber () and second opposing return means (). The control duct () is suitable for being connected to the brake release chamber (), and the first return means () are suitable for returning the cubic capacity selector to its large cubic capacity first position when the pressure in said chamber becomes lower than a first threshold pressure, whereas the second return means () return the brake means () to their braking position when the pressure in the brake release chamber becomes lower than a second threshold pressure, which is itself lower than said first threshold pressure.