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:
Apr. 21, 1987
Filed:
Apr. 18, 1986
Richard A Michael, Waterloo, IA (US);
Deere & Company, Moline, IL (US);
Abstract
A multi-speed power shift transmission providing a total of six speeds including forward and reverse gears with a minimum of friction elements. The transmission uses one compound planetary assembly of the Ravigneaux type coupled to a simple planetary assembly. The planetary assemblies are joined by two simple interconnections which transfer power between the planetary sections. The transmission uses three brakes and two clutches to provide the total of six (6) speed changes. Connection of the planetary carrier of the compound planetary assembly to the ring gear of the simple planetary assembly and a primary sun gear of the compound planetary assembly to the sun gear of the simple planetary assembly provides four forward speeds and two reverse speeds. This interconnection arrangement between the two planetary assemblies also provides favorable power splitting across the planetary sections which will permit a reduction in the size of gear elements and other transmission components.