Title:
HEAT RESISTANT DRILL SCREW
Document Type and Number:
WIPO Patent Application WO/2004/005732
Kind Code:
A1
Abstract:
A heat resistant drill screw suitable for drilling holes in a stainless steel sheet capable of preventing a delayed damage from occurring and providing a high corrosive resistance and a high tensile strength, comprising a drill part (4), a tapping screw part (5) arranged continuously with the drill part (4), a tightening screw part (6) arranged continuously with the tapping screw part, and a screw head part (3) for transmittingly providing a rotational force, characterized in that the drill part (4) and the tapping screw part (5) are formed of a high carbon chromium-based stainless steel, and the tightening screw part (6) including the screw head part (3) is formed of a nickel-based stainless steel.
Inventors:
SHINJO KATSUMI (JP)
Application Number:
PCT/JP2003/005915
Publication Date:
January 15, 2004
Filing Date:
May 12, 2003
Export Citation:
Assignee:
SHINJO MFG CO LTD (JP)
SHINJO KATSUMI (JP)
SHINJO KATSUMI (JP)
International Classes:
B21H3/10; B23K11/00; C22C38/18; F16B25/10; F16B33/00; F16B35/00; F16B33/04; (IPC1-7): F16B25/10; B23B51/08; B23B51/00
Foreign References:
| JPH0687080A | 1994-03-29 | |||
| JPH03277804A | 1991-12-09 | |||
| JPH02142911A | 1990-06-01 | |||
| JPH1036945A | 1998-02-10 | |||
| JPH10298646A | 1998-11-10 | |||
| JPH06264194A | 1994-09-20 | |||
| US6109851A | 2000-08-29 | |||
| US5755542A | 1998-05-26 |
Other References:
None
Attorney, Agent or Firm:
Takeishi, Yasuhiko (Chiyoda Seimei Kyoto Oike Bldg. 8F 200,
Takamiya-cho, Oike-dori, Takakura Nishi-iru, Nakagyo-k, Kyoto-shi Kyoto, JP)
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