| 发明名称 |
SPIRAL STEEL, APPLICATION PRODUCT OF SAME, AND METHOD FOR MANUFACTURING SPIRAL STEEL |
| 摘要 |
A purpose of the invention is to provide a spiral piece of steel having high mechanical strength and being capable of easily making smaller the pitch intervals of twisted portions (spiral blade portions) even without changing the twist angle, and also to provide an application product thereof and a method for manufacturing the spiral piece of steel.
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| 申请公布号 |
US2013175017(A1) |
申请公布日期 |
2013.07.11 |
| 申请号 |
US201113812413 |
申请日期 |
2011.07.25 |
| 申请人 |
GOTO TSUNEO |
发明人 |
GOTO TSUNEO |
| 分类号 |
F16L9/02;B01F7/00;B21C47/02;B65G33/26;E02D5/28;E02D5/80;E21B10/00;F28F1/00 |
主分类号 |
F16L9/02 |
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代理人 |
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