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. 28, 1989
Filed:
Oct. 13, 1988
Takeo Inoue, Tokyo, JP;
Fuji Jukogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A differential for a motor vehicle is locked in straight-ahead driving. The differential has a pair of output shafts rotatably supported and inserted into a cylindrical differential case, and a pair of carriers provided in the differential case and secured to the output shafts respectively. A pair of annular side gears are securely provided in the differential case, and an annular center gear is rotatably mounted in the differential case between the side gears. A pair of planetary gears are rotatably supported in the corresponding carrier. Each planetary gear comprises a pair of planetary pinions, one of which is engaged with the side gear and the other is engaged with the center gear. The gear ratio between one of the planetary pinion and the center gear is different from the gear ratio of the other planetary pinion and the center gear. For example if the numbers of teeth of both side gears are S.sub.1 and S.sub.2, the numbers of teeth of gears of the center gears are C.sub.1 and C.sub.2, the numbers of teeth of the planetary pinions for one of the output shafts are P.sub.1 and P'.sub. 1 and the numbers of teeth of the planetary pinions for the other output shaft are P.sub.2 and P'.sub.2. (S.sub.1 .multidot.P'.sub.1 /C.sub.1 .multidot.P.sub.1)+(S.sub.2 .multidot.P'.sub.2 /C.sub.2 .multidot.P.sub.2).apprxeq.2.