Pipe material

  • US 9,644,770 B2
  • Filed: 03/26/2013
  • Issued: 05/09/2017
  • Est. Priority Date: 06/28/2012
  • Status: Active Grant
First Claim
Patent Images

1. A pipe including:

  • a pipe body; and

    spacers set inside the pipe body and coupled with an inner wall of the pipe body,wherein an end face of a first spacer among the spacers is concave or a cross section of a first spacer among the spacers is impeller-shaped.

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