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US 6,092,556 AGranted
Multi-wall tube
AssigneeBundy Corporation
InventorDelbert L. Adkins
Life of this patent
Estimating the term…
Abstract
A multi-wall tube and a method for making the multi-wall metal tube. In the process, a preformed tube is used as an inner core. A metal strip, coated with binding metal, is longitudinally wrapped around the core tube. The assemblage is then heated to the brazing temperature of the binding metal whereby all layers become integral to form the finished multi-wall tube.
Claims19
A multi-layer metal tube comprising:
- an inner core tube having an outer cylindrical surface;
- a continuous strip of metal having an inner cylindrical surface coated with brazing material;
- wherein said metal strip is longitudinally wrapped at least once around said core tube and brazed thereto to form an integral tube.
A multi-layer tube comprised of:
- an inner core tube;
- a continuous metal strip longitudinally wrapped around said inner core tube;
- a layer of binding metal between said inner core tube and said wrapped metal strip binding said wrapped metal strip to said inner core tube.
A method of manufacturing a multi-layer tube comprising the steps of:
- (a) providing an inner core tube;
- (b) providing a continuous metal strip coated on at least one side with binding metal suitable for brazing;
- (c) wrapping said metal strip at least once longitudinally around said core tube;
- (d) heating said inner core tube wrapped with said metal strip to brazing temperature of said binding metal whereby all layers would become integral.
1 more element
Dependencies are inferred from the claim text.