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:
Jan. 19, 1993
Filed:
Jan. 16, 1992
Applicant:
Inventor:
John W Kuhn, Bristol, IN (US);
Assignee:
CMI International, Inc., Southfield, MI (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B22D / ;
U.S. Cl.
CPC ...
164100 ; 164 691 ; 164 98 ;
Abstract
A method for eliminating porosity defects in aluminum cylinder blocks (22) having cast-in-place metallurgically bonded cylinder liners (12) includes coating the liners (12) with a low melting point molten metal such as zinc and thereafter removing a virtually entire outer layer of pure Zn, which would otherwise melt during casting and invade the block metal, leaving behind shrinkage defects in the resultant cylinder block (22).