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:
May. 07, 2019
Filed:
Apr. 03, 2014
Applicant:
Poclain Hydraulics Industrie, Verberie, FR;
Inventors:
Assignee:
POCLAIN HYDRAULICS INDUSTRIE, Verberie, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16D 31/02 (2006.01); B60T 11/10 (2006.01); F16H 61/431 (2010.01); F16H 61/472 (2010.01); F16H 39/42 (2006.01);
U.S. Cl.
CPC ...
B60T 11/103 (2013.01); F16H 39/42 (2013.01); F16H 61/431 (2013.01); F16H 61/472 (2013.01);
Abstract
Hydraulic transmission apparatus () including a pump () having a variable cylinder capacity and feeding one or more hydraulic motors (A,B), and a control unit (). In the apparatus, the feed and discharge orifices of the motors are arranged in such a manner that, when the pressures at said orifices are equal, the outlet torque from the motors is zero. To make the apparatus inactive, without physically bypassing the motors, the control unit is suitable for operating the apparatus in a 'torque-free' mode by regulating the cylinder capacity of the pump in such a manner that the pressures at said feed and discharge orifices remain substantially equal.