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:
Oct. 26, 2004
Filed:
Sep. 26, 2002
Taizo Miyazaki, Hitachi, JP;
Tomoyuki Haniu, Yokosuka, JP;
Ryoso Masaki, Hitachi, JP;
Masahiko Amano, Hitachiohta, JP;
Yasuo Morooka, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A composite power transmission mechanism , comprising the combination of a planetary gear unit and a differential planetary gear mechanism wherein a planetary gear is connected with a drive shaft of a vehicle, while other three gears let the shafts of the motor a motor and an engine rotate respectively. The drive shaft of the vehicle is made to rotate by means of the planetary gear of the composite power transmission mechanism; since the rotation of different sources of a driving force, i.e., those of the motor the motor and the engine can be transmitted to one another by only one meshing of the gears, the mechanical loss that is dependent on the number of times of the meshing of the gears can be reduced to a minimum.