Title:
CONCRETE SLURRY TRANSPORTING PIPE FOR CONCRETE PUMP CAR
Document Type and Number:
WIPO Patent Application WO/2010/058965
Kind Code:
A2
Abstract:
The present invention relates to a concrete slurry transporting pipe for a concrete pump car, having abrasion resistant characteristics against friction with gravel or sand, which might be caused when the concrete pump car transports concrete slurry, and having improved impact resistance. The concrete slurry transporting pipe for the concrete pump car according to the present invention is a steel pipe made of carbon steel, and comprises a heat treated portion formed by induction-heating a part of the outside or inside of the pipe, and cooling and hardening the heated part of the pipe to the hardness of hv450 or higher; and a non-heat treated portion contacting the heat treated portion. The heat treated portion and the non-heat treated portion are consecutively arranged into a spiral band along the length of the pipe. The heat treated portion has a width wider than that of the non-heat treated portion.
Inventors:
JEONG, Jin-Hyun (105-401, Hyundai Apt. Mansu 6-dong, Namdong-gu, Incheon-si 405-768, 405-768, KR)
Application Number:
KR2009/006806
Publication Date:
May 27, 2010
Filing Date:
November 18, 2009
Export Citation:
Assignee:
TMC CORP. (750-1, Palbok-dong 2-ga Deokjin-g, Jeonju-si Jeollabuk-do 561-844, 561-844, KR)
주식회사 티엠시 (전라북도 전주시 덕진구 팔복동2가 750-1, 561-844 Jeollabuk-do, 561-844, KR)
주식회사 티엠시 (전라북도 전주시 덕진구 팔복동2가 750-1, 561-844 Jeollabuk-do, 561-844, KR)
International Classes:
C21D9/08; B65G33/04; C21D1/06; C21D1/42
Attorney, Agent or Firm:
DAE-A INTERNATIONAL IP & LAW FIRM (7F. Memo B/D, 719-21Yeoksam-dong, Gangnam-gu, Seoul 135-920, 135-920, KR)
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