Metal tube

Abstract

A metal tube includes a tubular body having at least one open end. At least one spiral wire is wound around and welded to the tubular body at the at least one open end. Thereby, the tubular body can be threadedly connected to something else at the at least one open end.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded perspective view of a first preferred embodiment of a metal tube in accordance with the present invention, showing a tubular body having a single open end;

FIG. 1A is a perspective view of the metal tube of FIG. 1, showing a spiral wire wound around and welded to an outer periphery of the tubular body at the single open end;

FIG. 2 is a perspective view of the metal tube of FIG. 1, showing a spiral wire wound around and welded to an inner periphery of the tubular body at the single open end;

FIG. 3 is an exploded perspective view of a second preferred embodiment of the inventive metal tube, showing the tubular body having a first open end and a second open end;

FIG. 3A is a perspective view of the metal tube of FIG. 3, showing two spiral wires both wound around and welded to the inner periphery of the tubular body at the open ends;

FIG. 3B is a perspective view of the metal tube of FIG. 3, showing two spiral wires both wound around and welded to the outer periphery of the tubular body at the open ends;

FIG. 3C is a perspective view of the metal tube of FIG. 3, showing a spiral wire wound around and welded to the outer periphery of the tubular body at the first open end and another spiral wire wound around and welded to the inner periphery of the tubular body at the second open end;

FIG. 4 is an exploded perspective view of a third preferred embodiment of the inventive metal tube; and

FIG. 4A is a perspective view of the metal tube of FIG. 4.

Claims

1. A metal tube comprising: a tubular body, having at least one open end; andat least one spiral wire, wound around and welded to said tubular body at said at least one open end;whereby said tubular body may be threadedly connected to something else at said at least one open end.

2. The metal tube as claimed in claim 1, wherein said tubular body has a first open end and a second open end, and wherein two spiral wires are wound around and welded to said tubular body at said open ends, respectively.

3. The metal tube as claimed in claim 2, wherein said spiral wires are both wound around and welded to an outer periphery of said tubular body at said open ends.

4. The metal tube as claimed in claim 2, wherein said spiral wires are both wound around and welded to an inner periphery of said tubular body at said open ends.

5. The metal tube as claimed in claim 2, wherein one of said spiral wires is wound around and welded to an outer periphery of said tubular body at said first open end, and the other of said spiral wires is wound around and welded to an inner periphery of said tubular body at said second open end.

6. The metal tube as claimed in claim 1, wherein said open end is diametrically reduced, and where said spiral wire is wound around and welded to said tubular body at said open end.

7. The metal tube as claimed in claim 6, wherein said spiral wire is wound around and welded to an outer periphery of said tubular body at said open end.