发明申请
- 专利标题： Bolt set made of steel
- 专利标题（中）： 螺栓套由钢制成
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申请号： US11085596申请日： 2005-03-22
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公开(公告)号： US20050207868A1公开(公告)日： 2005-09-22
- 发明人: Nobuyoshi Uno , Mamoru Suzuki , Toshio Miyagawa , Kouzou Wakiyama , Keiji Hirai
- 申请人： Nobuyoshi Uno , Mamoru Suzuki , Toshio Miyagawa , Kouzou Wakiyama , Keiji Hirai
- 优先权： JP2004-082640 20040322
- 主分类号： F16B33/04
- IPC分类号： F16B33/04 ; F16B25/00 ; F16B33/02
摘要：
A bolt set is provided that is made of steel free from technical difficulties in production, inexpensive in production cost, and improved in fatigue strength by a simple configuration. More particularly, a bolt set made of steel in which a tensile fluctuation stress acts upon an external thread side, characterized by setting a pitch difference ΔP(=Pf−Pm) between a pitch Pm of the external thread and a pitch Pf of the internal thread within a range of 0.5-0.8% based on a pitch P prescribed in JIS B 0205 of Japan Industrial Standard.
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