Title:
WATER PIPE FOR WHICH HYDROFORMING IS EMPLOYED, AND A PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2011/059147
Kind Code:
A1
Abstract:
Disclosed are a twin-piping water pipe for which hydroforming is employed, and a production method therefor. According to the present invention, the production method for the twin-piping water pipe for which hydroforming is employed comprises the steps of: (a) inserting, into an outer tube formed from steel, an inner tube which is formed from a corrosion resistant material selected from stainless steel, titanium and aluminium and which has an outer diameter smaller than the inner diameter of the outer tube; (b) stably placing the outer tube in a mould and then sealing the two ends of the mould by using a sealing means having a throughhole connected to a fluid supply device for supplying a fluid to the inner tube; (c) supplying the fluid to the inner tube and thereby plastically expanding the inner tube and resiliently expanding the outer tube; and (d) discharging the fluid from the inner tube and thereby resiliently restoring the outer tube and subjecting the inner tube and the outer tube to friction coupling.
Inventors:
PARK, Sung-Pill (101-102, Sungwon SsangtteVill Apt. Yeompo-dong, Buk-gu, Ulsan 683-715, 683-715, KR)
박성필 (울산광역시 북구 염포동 성원상떼빌아파트 101동 102호, 683-715 Ulsan, 683-715, KR)
JIN, Kyung-Soo (6 Pyeongchang 3-cha Apt, Samsan-dong Nam-gu, Ulsan 680-770, 680-770, KR)
진경수 (울산광역시 남구 삼산동 평창3차아파트 603동 1505호, 680-770 Ulsan, 680-770, KR)
박성필 (울산광역시 북구 염포동 성원상떼빌아파트 101동 102호, 683-715 Ulsan, 683-715, KR)
JIN, Kyung-Soo (6 Pyeongchang 3-cha Apt, Samsan-dong Nam-gu, Ulsan 680-770, 680-770, KR)
진경수 (울산광역시 남구 삼산동 평창3차아파트 603동 1505호, 680-770 Ulsan, 680-770, KR)
Application Number:
KR2010/002176
Publication Date:
May 19, 2011
Filing Date:
April 08, 2010
Export Citation:
Assignee:
HYUNDAI HYSCO (265 Yeompo-dong, Buk-gu, Ulsan 683-711, 683-711, KR)
현대하이스코 주식회사 (울산시 북구 염포동 265번지, 683-711 Ulsan, 683-711, KR)
PARK, Sung-Pill (101-102, Sungwon SsangtteVill Apt. Yeompo-dong, Buk-gu, Ulsan 683-715, 683-715, KR)
박성필 (울산광역시 북구 염포동 성원상떼빌아파트 101동 102호, 683-715 Ulsan, 683-715, KR)
JIN, Kyung-Soo (6 Pyeongchang 3-cha Apt, Samsan-dong Nam-gu, Ulsan 680-770, 680-770, KR)
현대하이스코 주식회사 (울산시 북구 염포동 265번지, 683-711 Ulsan, 683-711, KR)
PARK, Sung-Pill (101-102, Sungwon SsangtteVill Apt. Yeompo-dong, Buk-gu, Ulsan 683-715, 683-715, KR)
박성필 (울산광역시 북구 염포동 성원상떼빌아파트 101동 102호, 683-715 Ulsan, 683-715, KR)
JIN, Kyung-Soo (6 Pyeongchang 3-cha Apt, Samsan-dong Nam-gu, Ulsan 680-770, 680-770, KR)
International Classes:
F16L9/02; B21D26/02; F16L9/14; F16L9/18
Attorney, Agent or Firm:
DAE-A INTERNATIONAL IP & LAW FIRM (3F. Hanyang Bldg, 830-71 Yeoksam-dong,Gangnam-gu, Seoul 135-936, 135-936, KR)
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