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. 12, 1985
Filed:
Apr. 16, 1984
Applicant:
Inventor:
Kunihiko Suzuki, Sagamihara, JP;
Assignee:
Nissan Motor Company, Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60K / ;
U.S. Cl.
CPC ...
180249 ; 180197 ;
Abstract
A four-wheel drive system of a vehicle has a center differential between front wheels and rear wheels, and means for restraining or locking the center differential. The four-wheel drive system is combined with a control system for automatically locking the center differential when the difference between an average rotational speed of the right and left front wheels and an average rotational speed of the right and left rear wheels becomes equal to or larger than a predetermined value.