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:
Aug. 18, 2015
Filed:
Apr. 17, 2013
Johnson Electric S.a., Murten, CH;
Yue Wang, Shenzhen, CN;
Xing Ju Yi, Shenzhen, CN;
Guo Ping Zhang, Shenzhen, CN;
Xiao Hui Wang, Shenzhen, CN;
Hong Yu Ding, Shenzhen, CN;
Jing Ning Ta, Hong Kong, CN;
Dennis Francis Gorosin, Hong Kong, CN;
JOHNSON ELECTRIC S.A., Murten, CH;
Abstract
The planetary gear train includes a first sun gear driven by the motor, a first ring gear, a first carrier, and a plurality of first planetary gears arranged at one side of the first carrier and meshing with the first sun gear and the first ring gear. The first sun gear, first planetary gears and first ring gear are helical gears so that meshing surface is increased. Helical teeth formed on an inner surface of the first ring gear mesh with the helical teeth of the first planetary gears. Therefore, the operation is stable and the noise is low. The planetary gears are made of plastic to further decrease the noise. The first ring gear is made by sintered powder metallurgy.