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:
Jul. 15, 2003
Filed:
Feb. 05, 2002
Viktor Arbanas, Baden, CH;
Ernst Zysset, Macolin, CH;
The Swatch Group Management Services AG, Biel, CH;
Abstract
The drive assembly includes one or more motors ( ) driving at least a pair of continuously variable ratio transmission devices ( ) which each drive a driving wheel or driving axle of the vehicle. Each transmission device includes a planetary gear ( ) whose reaction element, preferably the ring gear with an inner toothing, is connected to the rotor of a pump through which a hydraulic circuit passes provided with at least an adjustable valve ( ) for adjusting the speed and/or the torque of the output shaft ( ), in particular to facilitate the attainment of an operating speed for the motor when starting. The hydraulic circuits of the two transmission devices are interconnected by hydraulic lines ( ), which assures a differential effect between the two wheels concerned. One of these lines may include an adjustable valve ( ) for limiting or blocking the differential effect.