The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 02, 2024
Filed:
May. 09, 2019
Valmet Technologies Oy, Espoo, FI;
Juha Ojanperä, Pirkkala, FI;
Harri Yli-Rantala, Hellanmaa, FI;
VALMET TECHNOLOGIES OY, Espoo, FI;
Abstract
A coaxial heat transfer tube (), comprising a first inner heat transfer tube () having straight parts () and curved parts (), a first outer heat transfer tube () having straight parts () and curved parts (). The first outer heat transfer tube () radially surrounds the first inner heat transfer tube () at least within the first primary straight part () and the first primary curved part (). Thermally insulating material () has been provided in between a curved part () of the first outer heat transfer tube () and a curved part () of the first inner heat transfer tube (). Neither straight part () nor a curved part () of the first outer heat transfer tube () comprises a longitudinal seam. A method for making a coaxial heat transfer tube ().