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. 14, 1992
Filed:
Jul. 08, 1991
Nils Fredriksen, Harsewinkel, DE;
Jan-Hendrik Mohr, Borken, DE;
Claas oHG, Harsewinkel, DE;
Abstract
A power transmision with a hydrostatically branched variable-displacement gear (HG), a two-stage epicyclic gear (I, II) and a mechanical 8-speed transmission that can be operated in forward and reverse, and with a control system (ST) that triggers the clutches (VV, VR, V0-V8) of the mechanical gear means such that for starting, the variable-displacement gear (HG) is shifted unbranched to the output shaft (ASW) and the clutches are each shifted in a load-free manner, and only on shifting up to 6th gear via the clutch (K5) of the 5th gear and on downshifting to a selectable 4th gear via the 4th-gear clutch (K4) a synchronization of the intermediate shaft (ZW) is effected. Starting and reversing are done by hydrostatically; the efficiency is high; the mechanical transmission factor is approximately 60; synchronization wear is low; and there are only two synchronizing clutches (K4, K5). In a second specifiable operating mode, the mechanical gear means is controlled in a manner free of synchronization, as a 4-speed transmission with a hydrostatic starting and reversing range.