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. 29, 2012
Filed:
Mar. 12, 2009
Hirotaka Sunada, Nishikamo-gun, JP;
Kiyoharu Nakamura, Seto, JP;
Shinobu Shimasaki, Toyota, JP;
Motohiro Tsuzuki, Toyota, JP;
Yusuke Kato, Nagoya, JP;
Hirotaka Sunada, Nishikamo-gun, JP;
Kiyoharu Nakamura, Seto, JP;
Shinobu Shimasaki, Toyota, JP;
Motohiro Tsuzuki, Toyota, JP;
Yusuke Kato, Nagoya, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
To provide a variable valve operating apparatus for an internal combustion engine which can reduce a range where heat treatment is required, thereby favorably suppressing distortion which occurs in a camshaft during heat treatment, to a low level. A changeover mechanism is provided which includes a slide pin which is adapted to move within a predetermined reciprocating range thereby switching between operational states of a variable mechanism, and a guide rail provided in an outer peripheral surface of the camshaft and guides the movement of the slide pin from one end to a remaining end of the reciprocating range. A projection part which is engageable with the guide rail is provided in the slide pin. Restriction means which performs at least one of a restriction of contact between a top surface of the projection part and a bottom surface of the guide rail opposing the projection part, and a restriction of movement of the slide pin beyond a distance from the above-described one end to the above-described remaining end.