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:
Apr. 17, 2012
Filed:
Mar. 20, 2007
Shuichi Ezaki, Susono, JP;
Manabu Tateno, Shizuoka-ken, JP;
Akio Kidooka, Kanagawa-ken, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Abstract
A valve drive system comprises a power transmitting mechanism () that converts rotary motion of an electric motor () into opening and closing motion of an intake valve () provided in a cylinder () of an internal combustion engine () to transmit power from the electric motor () to the valve () via a cam (); and a rotational angle restricting mechanism () that is provided in a motion transmission path that extends from the electric motor () to the cam () and restricts rotation of the cam () within a predetermined angular range that is set so that a piston () of the engine () and the intake valve () do not interfere with each other. The rotational angle restricting mechanism () comprises a flange () that rotates as a unit with a camshaft () and forms a slotted groove hole () thereon; and a stopper pin () that is inserted into and retracted from the groove hole ().