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:
May. 21, 2013
Filed:
Apr. 14, 2010
Naoki Kokubo, Hiratsuka, JP;
Atsushi Yamanaka, Atsugi, JP;
Shinichi Kawada, Isehara, JP;
Michinori Saito, Atsugi, JP;
Koichiro Ono, Odawara, JP;
Kazuhiko Takayanagi, Atsugi, JP;
Naoki Kokubo, Hiratsuka, JP;
Atsushi Yamanaka, Atsugi, JP;
Shinichi Kawada, Isehara, JP;
Michinori Saito, Atsugi, JP;
Koichiro Ono, Odawara, JP;
Kazuhiko Takayanagi, Atsugi, JP;
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, JP;
Abstract
A drive rotation member is driven by a crankshaft of the engine, and a driven rotation member is rotatable relative to the drive rotation member and secured to a cam shaft of the engine. An electric motor is arranged to rotate together with the drive rotation member and produces a dynamic power when fed with an electric current through brushes. A hollow control shaft is rotatable relative to the drive rotation member and forces the driven rotation member to rotate relative to the drive rotation member when rotated by the power of the electric motor. A bearing device is arranged between the driven rotation member and the hollow control shaft for smoothing a relative rotation therebetween. The bearing device includes a plurality of rollers. A lubrication oil feeding structure is provided for causing the rollers of the bearing device to be submerged in a lubrication oil at least when the engine is in operation.