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:
Jul. 23, 1996
Filed:
Apr. 25, 1995
Masami Fukuzawa, Saitama-ken, JP;
Kazuhide Kumagai, Saitama-ken, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A valve operating apparatus for driving intake valves and exhaust valves of an internal combustion engine has a valve operating cam and a rocker arm unit. The rocker arm unit is made up of driving rocker arms which operatively contact the valves, a free rocker arm which is free from contact with the valves, and a changeover mechanism for varying the valve lift amount and timing of opening and closing the valves by connecting the rocker arms and releasing the connection between them. The free rocker arm is urged by a torsion spring so as to operatively contact the valve operating cam. The torsion spring is disposed inside a hollow rocker arm shaft of the rocker arm unit. In case the free rocker arm is fixed to the rocker arm shaft, a coil spring is disposed inside a supporting portion for rotatably supporting the rocker arm shaft such that the free rocker arm is urged by the coil spring via the rocker arm shaft.