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:
Apr. 27, 1999
Filed:
Nov. 13, 1997
Hideo Tsuji, Nagoya, JP;
Hideo Ishikawa, Nagoya, JP;
Yasuo Ido, Nagoya, JP;
Takayuki Shibayama, Nagoya, JP;
Daido Metal Company Ltd., Nagoya, JP;
Abstract
In producing an aluminum alloy bearing which comprises bonding an aluminum alloy layer to a backing metal layer composed of steel and then coating an intermediate layer and an overlay in this order on the surface of the aluminum alloy layer of the resulting semi-finished product, the surface of the aluminum alloy layer of the semi-finished product is subjected to etching treatment and the smut attached to the said surface is removed by subjecting the etched semi-finished product to de-smutting treatment using, as a de-smutting solution, an aqueous solution comprising 20 to 60% by weight of sulfuric acid and 2 to 10% by weight of a peroxoborate, whereby the tolerance of the bearing height is made small, the working environment is rendered good and the draining treatment is made easy.