| GOLDEN DRAGON PRECISE COPPER TUBE GROUP, INC. Patent applications |
| Patent application number | Title | Published |
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| 20110226457 | CONDENSATION ENHANCEMENT HEAT TRANSFER PIPE - A condensation enhancement heat transfer pipe includes an optical pipe section, a fin section, and a transition section connecting the optical pipe section and the fin section. The outer surface of the fin section is provided with a plurality of individual fins, each of the individual fins has an acute shape of zigzag and forms an angle relative to the axial direction, an axial fin channel forms between the two adjacent ones of said individual fins along the axial direction, a peripheral fin channel forms between the two adjacent ones of said individual fins along the peripheral direction, an end, which is distributed along said axial direction, of each of said individual fins includes platforms, the fin side walls are connected with the platform by an arc, and the platforms are parallel to each other along the peripheral direction. The platform on the fin increases the heat transfer area of the sidewall, and the fin and the platform cause liquid film to flow through several turnings so as to reduce the thickness of the condensation liquid film to decrease the heat transfer resistance. The arc connection between the fin sidewall and the platform facilitates condensation liquid flow. Under the surface tension, the liquid film can flow quickly downward, thus the enhancement of the heat transfer property is maximized. | 09-22-2011 |
| 20110076184 | NOVEL ALUMINUM ALLOY AND PRODUTS THEREOF - The present invention provides a high corrosion resistant aluminum alloy consisting essentially of (by weight %): 0.30-1.25% Mn, 0.10-1.20% Si, 0.05-0.25% Cr, 0.05-0.2% Zr, 0.08-0.30% Ti, less than 0.03% Zn, less than 0.03% Cu, and up to 0.20% Fe, balance aluminum and inevitable impurities. The present invention also relates to articles made of the alloy. | 03-31-2011 |
| 20100276039 | COPPER ALLOY, METHOD OF PRODUCING THE SAME, AND COPPER TUBE - Copper alloys, methods for producing copper alloys, and copper tubes are provided. The copper alloys include an alpha solid solution formed from phosphorous deoxidized copper and at least one trace element comprising tin. The content of tin ranges from about 0.1% to about 2.0% by weight of the copper alloy. The trace element can further include zinc in an amount from about 0.05% to about 1.0% by weight of the copper alloy. The copper alloys have an increased tensile strength due to the strengthening effect by the alpha solid solution formed by phosphorous deoxidized copper and tin as the trace element, and accordingly a copper tube made from the copper alloy has a significantly improved pressure resistance. | 11-04-2010 |
