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. 12, 2015
Filed:
Oct. 19, 2011
Dojoong Kim, Ulsan Metropolitan-si, KR;
Minoru Shiino, Hadano, JP;
Ken-ya Sugawara, Hadano, JP;
Mamoru Kato, Hadano, JP;
Dojoong Kim, Ulsan Metropolitan-si, KR;
Minoru Shiino, Hadano, JP;
Ken-ya Sugawara, Hadano, JP;
Mamoru Kato, Hadano, JP;
University of Ulsan Foundation for Industry Cooperation, Ulsan Mteropolitan-si, KR;
Nittan Valve Co., Ltd., Hadano-shi, JP;
Abstract
A continuously variable valve lift device with improved lift amount change accuracy includes a rocker arm causing an engine valve to perform an opening/closing operation with a cam of a cam shaft, and an engine valve lift amount change mechanism. The mechanism has a control shaft which has an eccentric circular disc cam, a control arm which swings about the eccentric circular disc cam and having a cam contact portion in contact with a first cam and a first arm, second biasing means for biasing the cam contact portion against the first cam, a second cam portion of a free-form surface shape contacting with the second arm and the rocker arm, a cam member supported so as to be capable of turning around the shall main body, and a link arm with both ends supported so as to be capable of turning by the first arm and the second arm.