Method for producing double-wall tube with braided wires at its interface
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United States of America Patent
Stats
-
Jan 19, 2016
Grant Date -
Aug 15, 2013
app pub date -
Oct 17, 2011
filing date -
Oct 18, 2010
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Provided is a method for producing a double-wall tube with braided wires at its interface in which the braided wires are interposed between an outer-wall and inner-wall blank tubes and then a drawing process is applied so as for the braided wires to be brought into close contact with the inner surface of the outer-wall tube and the outer surface of the inner-wall tube, the method comprising: polishing the inner surface of the outer-wall blank tube and the outer surface of the inner-wall blank tube so that a surface roughness thereof satisfies Ra<1.0 μm, followed by interposing the braided wires between the outer-wall and inner-wall blank tubes; performing a sinking drawing process so that the difference of the outer diameter of the resulting double-wall tube relative to a die bore diameter is 0.1 mm to 0.3 mm; and subsequently performing heat treatment. The double-wall tube produced is suitable as a heat-transfer tube.
First Claim
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International Classification(s)
- 2011 Application Filing Year
- F28F Class
- 657 Applications Filed
- 363 Patents Issued To-Date
- 55.26 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- F28F Class
- 0 % this patent is cited more than
- 9 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jul 19, 2027 |
