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:
Jun. 30, 1981
Filed:
Aug. 13, 1979
Emiliano Brancolini, Sorbara, IT;
Fiat Trattori S.p.A., Modena, IT;
Abstract
A speed change gearbox for agricultural tractors and similar vehicles has an elongate casing rotatably mounting input and output shafts which are coupled by gearing comprising reduction means selectively operable to provide one of a plurality of reduction ratios, and a final gearing stage which serves to set a particular range of ratios. The reduction means includes an epicyclic gear mechanism provided with associated hydraulic control means for selectively controlling movement of various of its elements, and pairs of continuously meshing gears operatively selectable by further hydraulic control means. The arrangement of the hydraulic control means is such that they are all centered on the input shaft which enables the transverse bulk of the gearbox to be minimized.