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:
Sep. 05, 1989
Filed:
Jan. 27, 1988
Hidetaka Koga, Fujisawa, JP;
Ikuo Kurosawa, Fujisawa, JP;
Atsushi Yamazaki, Fujisawa, JP;
Kouji Takahashi, Fujisawa, JP;
Fumihiro Naoe, Fujisawa, JP;
Motoi Takemura, Fujisawa, JP;
Naoyuki Kurotaki, Fujisawa, JP;
Isuzu Motors Limited, Tokyo, JP;
Abstract
In a driving apparatus for a four-wheel drive vehicle in accordance with the present invention, a multiple disc clutch is incorporated between a front wheel driving system and a rear wheel driving system, a hydraulic chamber is formed in a fixed casing supporting rotatably a front differential case in the front wheel driving system and a clutch piston is disposed in the hydraulic chamber. Bearings are disposed between the clutch piston and the front differential case in order to enable them to rotate relatively. Hydraulic pressure generated from hydraulic pressure generation means disposed outside each driving system is caused to act on the clutch piston so that the multiple disc clutch is operated by the press force of the clutch piston through the front differential case and the differential operation of the front and rear wheel is restricted in accordance with the operation force of the multiple disc clutch. Accordingly, the size in the radial direction can be reduced in the axial direction of the apparatus itself, and even if there is any limitation to the space, a large hydraulic pressure is permitted to act on the muliple disc clutch by forming only the small hydraulic chamber described above.