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:
Nov. 29, 1983
Filed:
Mar. 31, 1981
Kunihiko Suzuki, Fujisawa, JP;
Akihiko Muraoka, Yokohama, JP;
Nissan Motor Company, Limited, Yokohama, JP;
Abstract
A four-wheel-drive system for a vehicle, comprising a power unit having an output shaft in a lateral direction of the vehicle, a power transmission gear unit having input and output shafts parallel with the output shaft of the power unit, a speed reduction gear to be driven by the transmission output shaft, two final reduction gear units one of which is arranged for driving the front road wheels and the other of which is arranged to drive the rear road wheels of the vehicle, a series combination of two planetary gear assemblies one of which is capable of selectively producing two different gear ratios for low-speed and high-speed vehicle driving and the other of which is operatively connected between the two final reduction gear units so as to be capable of providing a differential gear action therebetween, and a low-and-high speed shifting clutch mechanism intervening between the speed reduction gear and the former planetary gear assembly.