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:
Aug. 12, 1986
Filed:
Feb. 26, 1985
Yoshinori Narita, Aichi, JP;
Hirohisa Makino, Aichi, JP;
NGK Spark Plug Co., Ltd., Nagoya, JP;
Abstract
A method for producing a cylinder head having a tubular exhaust port liner made of a ceramic material is disclosed. The method comprises providing a covering layer of refractory fibers around the outer circumference of the exhaust port liner, applying a metal cap over each end of the covered exhaust port liner and setting the covered exhaust port liner into a mold. A cylinder head then is cast around the exhaust port liner so that the portions of the metal caps contacting the cylinder head are fused to the cylinder head. The metal caps are bored out to open up the exhaust port after predetermined treatments are performed on the cylinder head.