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. 14, 2014
Filed:
Feb. 17, 2011
Andre Prigent, Saintines, FR;
Benjamin Basson, Compiegne, FR;
Jean Heren, Margny les Compiegne, FR;
Philippe Lucienne, Aumont en Halatte, FR;
Andre Prigent, Saintines, FR;
Benjamin Basson, Compiegne, FR;
Jean Heren, Margny les Compiegne, FR;
Philippe Lucienne, Aumont en Halatte, FR;
Poclain Hydraulics Industrie, Verberie, FR;
Abstract
A hydraulic transmission system for a vehicle is provided. The system includes a main pump serving to feed with fluid at least one hydraulic motor for driving a vehicle mover member; an auxiliary pump, the main pump and the auxiliary pump being suitable for being actuated jointly; and a 'bypass' connection between a delivery orifice of the auxiliary pump and an unpressurized reservoir. In addition, a first constriction is arranged on the bypass connection, and configured to maintain a pump protection pressure in a pump protection portion of the bypass connection. This pressure is applied to the main orifices of the main pump when said pump is actuated but is not delivering, thereby ensuring that the pump is protected.