Title:
SPIRAL STEEL, APPLICATION PRODUCT OF SAME, AND METHOD FOR MANUFACTURING SPIRAL STEEL
Document Type and Number:
WIPO Patent Application WO/2012/014840
Kind Code:
A1
Abstract:
The purpose of the invention is to provide a spiral steel having a high mechanical strength and being capable of easily narrowing the pitch interval of a twisted portion (spiral blade portion) even without changing a twist angle and also to provide an application product of the spiral steel and a method for manufacturing the spiral steel.
The spiral steel is formed in such a way that steels (f1 to f4) having, as a center axis, an axis parallel with the longitudinal direction of the steels and having a shape including at least three or more long side members disposed radially with respect to the center axis are twisted along the center axis.
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| WO/2012/046440 | RING PRODUCTION METHOD, DEVICE THEREFOR, AND RING |
Inventors:
GOTO TSUNEO (JP)
Application Number:
PCT/JP2011/066848
Publication Date:
February 02, 2012
Filing Date:
July 25, 2011
Export Citation:
Assignee:
GOTO TSUNEO (JP)
International Classes:
B21D11/14; E02D5/56; E02D17/20; E02D27/42; F28F9/24; F28F13/12
Foreign References:
| JPS4740925A | ||||
| JPS332864B1 | ||||
| JP2001152459A | 2001-06-05 | |||
| JP2005139614A | 2005-06-02 | |||
| JPH1061742A | 1998-03-06 | |||
| JP2005279362A | 2005-10-13 | |||
| JP2005134100A | 2005-05-26 | |||
| JPH0255623A | 1990-02-26 | |||
| JP2001323460A | 2001-11-22 | |||
| JP2002302961A | 2002-10-18 | |||
| JP2006309540A | 2006-11-09 | |||
| JP2003328356A | 2003-11-19 | |||
| JP2008202653A | 2008-09-04 | |||
| JP2005279362A | 2005-10-13 | |||
| JPH10296342A | 1998-11-10 |
Attorney, Agent or Firm:
TAMURA Chikashi et al. (JP)
Tamura 爾 (JP)
Tamura 爾 (JP)
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Claims:
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