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. 26, 2009
Filed:
Jan. 30, 2008
Koji Nishiyama, Nagoya, JP;
Koji Nishiyama, Nagoya, JP;
Aichi Machine Industry Co., Ltd., Nagoya-shi, JP;
Abstract
A cylinder head includes a lifter guide boss part, a concave relief groove portion and a guide portion. The lifter guide boss part defines a lifter bore arranged to slidably support a valve lifter. The concave relief groove portion has a predetermined width and a predetermined depth formed on the lifter guide boss part in a position corresponding to a rotation direction of a cam to avoid an interference between the cam and the lifter guide boss part. The relief groove portion includes a pair of groove side surfaces and a groove bottom surface with a pair of corner sections being formed between the groove bottom surface and the side groove surfaces. The guide portion protrudes from the groove bottom surface in a sliding direction of the valve lifter to slidably guide the valve lifter. The guide portion is spaced apart from the corner sections of the relief groove portion.