Title:
STAKING BOLT
Document Type and Number:
WIPO Patent Application WO/2018/220887
Kind Code:
A1
Abstract:
This staking bolt comprises a head section 10 and a shaft section 11 on which an external thread 12 is formed. A ring-shaped protrusion 20 and a ring groove 21, which is located on the head-section side of the ring-shaped protrusion 20, are formed on the upper end of the shaft section 11. The head section 10 is flat, and a rotation-prevention protrusion 14, which is provided with a plurality of radial arm sections 15, protrudes at a thickness of t on the seating surface 13 of the head section. The minimum diameter D between the arm sections 15 is greater than the outer diameter d of the ring-shaped protrusion 20, and t*(D-d)/2, which is the vertical cross-sectional area A of the minimum diameter section of the rotation-prevention protrusion 14, is greater than or equal to the vertical cross-sectional area of the ring groove 21.
Inventors:
HOSHINO NAOKI (JP)
KOGA KAZUHIRO (JP)
FUJIMOTO YUKINORI (JP)
KOGA KAZUHIRO (JP)
FUJIMOTO YUKINORI (JP)
Application Number:
PCT/JP2017/043502
Publication Date:
December 06, 2018
Filing Date:
December 04, 2017
Export Citation:
Assignee:
AOYAMA SEISAKUSHO (JP)
International Classes:
F16B35/04; F16B35/00; F16B37/00; F16B39/282
Domestic Patent References:
WO2015005347A1 | 2015-01-15 |
Foreign References:
US4637766A | 1987-01-20 | |||
JP2013244903A | 2013-12-09 | |||
US20030108400A1 | 2003-06-12 | |||
JP2011241905A | 2011-12-01 | |||
US20140003883A1 | 2014-01-02 | |||
US5797175A | 1998-08-25 | |||
US3967669A | 1976-07-06 |
Other References:
See also references of EP 3591244A4
Attorney, Agent or Firm:
NAJIMA PATENT OFFICE (JP)
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