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:
Oct. 24, 1995
Filed:
May. 31, 1994
Ravi Rungta, East Amherst, NY (US);
Muftau M Alabi, East Amherst, NY (US);
General Motors Corporation, Detroit, MI (US);
Abstract
An improved aluminum alloy stock material is provided for use in a tubeplate-and-center type evaporator within an automobile air conditioning system. The improved aluminum alloy stock contains a unique aluminum alloy core material which is clad on both sides with an appropriate aluminum-silicon brazing alloy. The inventive aluminum alloy core material is characterized by the presence of boron in amounts sufficient to inhibit the formation of copper-rich precipitates in the grain boundaries of the alloy, so as to enhance the ability of the alloy to resist intergranular corrosion. The alloy is also characterized by a higher copper concentration and lower manganese and titanium concentrations as compared to conventional aluminum alloys used in these types of aluminum alloys.