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Methods of manufacturing a double-walled tube

  • US 10,638,791 B2
  • Filed: 10/21/2015
  • Issued: 05/05/2020
  • Est. Priority Date: 10/22/2014
  • Status: Expired due to Fees
First Claim
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1. A method for manufacturing a double-walled tube, the method comprising:

  • forming two extruded tubes, wherein an inner extruded tube is arranged inside an outer extruded tube;

    applying a vacuum to a cavity between the outer extruded tube and a mold so as to vacuum mold the outer extruded tube against the mold;

    sealing the inner extruded tube to the outer extruded tube to define a first end of the double-walled tube; and

    theninserting a substance that can be activated to act as a heat source or as a coolant into a cavity between the inner extruded tube and the outer extruded tube.

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