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US 2009/0211325 A1Published application
Steel core brass stair rod
OwnerD. Hussein Zoroufyinventor
Life of this patent
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Abstract
A method of making a steel core brass stair rod includes placing a brass billet into a chamber of an extrusion apparatus, where the brass billet includes an aperture configured to receive a steel core. The brass billet is heated to a temperature at which the brass billet is pliable. The brass billet and the steel core are co-extruded through a die of the extrusion apparatus such that the brass billet forms a brass shell which is fused to the steel core, where there is no air gap between the brass shell and the steel core.
Claims11
A method of making a steel core brass stair rod comprising:
- placing a brass billet into a chamber of an extrusion apparatus, wherein the brass billet comprises an aperture configured to receive a steel core;
- heating the brass billet to a temperature at which the brass billet is pliable;
- and
- co-extruding the brass billet and the steel core through a die of the extrusion apparatus such that the brass billet forms a brass shell which is fused to the steel core, wherein there is no air gap between the brass shell and the steel core.
1 more element
A method of making a steel core brass stair rod comprising:
- placing a brass tube into a chamber of a drawing apparatus, wherein the brass tube is configured to receive a steel core;
- heating the brass tube to a temperature at which the brass tube is pliable;
- and
- co-drawing the brass tube and the steel core through a die of the drawing apparatus such that the brass tube forms a brass shell which is fused to the steel core, wherein there is no air gap between the brass shell and the steel core.
1 more element
Dependencies are inferred from the claim text.