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:
Jun. 17, 2014
Filed:
Apr. 11, 2012
Atsushi Yamanaka, Atsugi, JP;
Naoki Kokubo, Hiratsuka, JP;
Ryo Tadokoro, Atsugi, JP;
Shinichi Kawada, Isehara, JP;
Atsushi Yamanaka, Atsugi, JP;
Naoki Kokubo, Hiratsuka, JP;
Ryo Tadokoro, Atsugi, JP;
Shinichi Kawada, Isehara, JP;
Hitachi Automotive Systems, Ltd., Ibaraki, JP;
Abstract
A variable valve timing control apparatus has a drive rotary member, a driven rotary member fixed to a camshaft, an electric motor relatively rotating a motor drive shaft with respect to the drive rotary member, a speed reduction mechanism transmitting rotation of the motor drive shaft to the driven rotary member a housing connected integrally with the drive rotary member and housing therein the electric motor, a cover member fixed to an engine so as to cover at least a front end part of the housing, a power feed mechanism having a slip ring and a power-feed brush that touches the slip ring and feeding power to the electric motor, and a ring-shaped member. The ring-shaped member is fixed to either one side of the cover member and the motor drive shaft, and makes sliding contact with the other side of the cover member and the motor drive shaft.