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. 04, 1994
Filed:
Mar. 24, 1993
Jose J Garcia, Jamestown, NY (US);
Valeo Engine Cooling, Inc., Jamestown, NY (US);
Abstract
A tubular element for a heat-exchanger comprises a tubular core composed of a first aluminum alloy comprising up to 0.3 wt % maximum of silicon, up to 0.5 wt % maximum of iron, from 0.50 to 0.70 wt % of copper, from 0.65 to 1.0 wt % of manganese, from 0.1 to 0.30 wt % of magnesium, up to 0.05 wt % maximum of zinc, from 0.08 to 0.10 wt % of titanium, and the balance aluminum and unavoidable impurities; an inner layer of a second aluminum alloy on the tubular core; and an outer brazable layer of a third aluminum alloy on the tubular core. The tubular core and the inner layer may be selected to have a corrosion potential difference of from 170 to 200 mV verses a saturated calomel electrode. The tubular core may have a grain size falling within the range about ASTM 5 to about ASTM 6 and the grains having a morphology which is elongated in the axial direction of the tubular core.