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:
Sep. 16, 1997
Filed:
Mar. 20, 1995
Applicant:
Inventor:
Masao Koriyama, Iwata, JP;
Assignee:
Yamaha Hatsudoki Kabushiki Kaisha, Shizuoka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02F / ;
U.S. Cl.
CPC ...
123668 ; 1231932 ;
Abstract
A sleeveless cylinder block for an automobile engine, motorcycle engine or the like having at least one cylinder such as that made of an aluminum ally, the inside surface of which is plated, is characterized in that a marginal portion from the bottom end of the inside surface of the cylinder on the side of the cylinder skirt and the remaining part of the cylinder block lower than the marginal portion are not plated, whereby only a target area inside the cylinder is securely plated, and further the area between the bottom of the cylinder and the cylinder skirt is strengthened.