Title:
PIPE WITH SPIRAL GROOVE ON INNER SURFACE
Document Type and Number:
Japanese Patent JP2021119018
Kind Code:
A
Abstract:
To provide a pipe with a spiral groove on an inner surface, which is made from aluminum or an aluminum alloy.SOLUTION: In the present invention, a plurality of spiral grooves are formed along a lengthwise direction of a pipe body on an inner peripheral surface of the pipe body made from aluminum or an aluminum alloy. A torsion angle of each of the plurality of spiral grooves is periodically and continuously increased/decreased within a fixed range along the lengthwise direction of the pipe body.SELECTED DRAWING: Figure 8
Inventors:
NAKAURA SUKENORI
HATERUMA YUKI
HATERUMA YUKI
Application Number:
JP2021078796A
Publication Date:
August 12, 2021
Filing Date:
May 06, 2021
Export Citation:
Assignee:
MITSUBISHI ALUMINIUM
International Classes:
B21C1/14; B21C1/22; B21C1/26; B21C23/10; B21C37/20; F28F1/40; F28F21/08
Domestic Patent References:
| JP2010101508A | 2010-05-06 | |||
| JPH10153360A | 1998-06-09 | |||
| JPS62240108A | 1987-10-20 | |||
| JP2003053421A | 2003-02-26 | |||
| JP2016164489A | 2016-09-08 |
Attorney, Agent or Firm:
Yasushi Matsunuma
Mitsuo Teramoto
Fumihiro Hosokawa
Kazunori Onami
Mitsuo Teramoto
Fumihiro Hosokawa
Kazunori Onami