Title:
METHOD FOR MANUFACTURING BRANCHED PIPE AND APPARATUS FOR MANUFACTURING BRANCHED PIPE
Document Type and Number:
WIPO Patent Application WO/2012/015007
Kind Code:
A1
Abstract:
Provided is a method for manufacturing a branched pipe, comprising a first bulging step for applying a pressure to an inside surface of an untreated pipe (200) using an elastic body (81), whereby an opening along a circumferential direction (C) is formed at a distal end part of a bulging section (300) while the bulging section (300) is caused to bulge out from the trunk (250) of the untreated pipe (200); and a second bulging step for applying a pressure to the inside surface of the element pipe (200) using the elastic body (81), whereby the bulging section (300) is caused to bulge out from the trunk (250).
Inventors:
OGURA TAIKI (JP)
ITOU TATSUSHI (JP)
ITOU TATSUSHI (JP)
Application Number:
PCT/JP2011/067357
Publication Date:
February 02, 2012
Filing Date:
July 28, 2011
Export Citation:
Assignee:
KOMATSU MFG CO LTD (JP)
OGURA TAIKI (JP)
ITOU TATSUSHI (JP)
OGURA TAIKI (JP)
ITOU TATSUSHI (JP)
International Classes:
B21D22/10; B21C37/29; B21D19/08; B21D26/035; B21D26/037
Foreign References:
| JPS5154135U | 1976-04-24 | |||
| JPH07275973A | 1995-10-24 | |||
| JP2007105788A | 2007-04-26 | |||
| JP2001286944A | 2001-10-16 | |||
| JP2004001022A | 2004-01-08 | |||
| JPS447626B1 |
Attorney, Agent or Firm:
Shinjyu Global IP (JP)
fresh green -- a global IP patent business corporation (JP)
fresh green -- a global IP patent business corporation (JP)
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Claims:
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