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:
Jan. 27, 2009
Filed:
Jul. 11, 2007
Masahiko Watanabe, Yokohama, JP;
Atsushi Yamanaka, Kanagawa, JP;
Masahiko Watanabe, Yokohama, JP;
Atsushi Yamanaka, Kanagawa, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A variable valve timing control apparatus of an internal combustion engine, has a drive rotary member rotated by an engine crankshaft; a driven rotary member fixed to a camshaft that has a cam opening/closing an engine valve, the driven rotary member driven by the drive rotary member; a phase-change mechanism provided between the drive and driven rotary members and changing a relative rotational phase between the drive and driven rotary members; and a locking mechanism. The locking mechanism links any two of the drive rotary member, the driven rotary member and the phase-change mechanism or releases the link in accordance with temperature of the phase-change mechanism.