Title:
BLIND BOLT
Document Type and Number:
WIPO Patent Application WO/2019/082984
Kind Code:
A1
Abstract:
Provided is a blind bolt which can be fastened with a high joining strength and easily unfastened by using commercially available tools. This blind bolt for fastening an attachment member (71) having attachment holes (72, 73) formed therein and an attachment target member (70) is provided with: a bolt (10) having a head section (11) having a large diameter, a cylindrical section (13) adjacent to the head section, and a male thread section (15); a washer (20); an outer nut (30) having a first end surface (35), a second end surface (36), and an outer nut hole; an expanded-diameter sleeve (40) having a first curved section, which has a central portion that bulges outward, and a second curved section, which is thicker than the first curved section and has a central section that bulges outward; and an inner nut (50) having an inner nut end section which can be inserted into the outer nut hole of the outer nut, a cylindrical inner nut cylinder section (53), an inner nut head section (55) having a larger diameter than the cylinder part, an inner nut hole (52) into which the cylindrical section of the bolt can be inserted, and a female thread section (57) that is screwed with the male thread section of the bolt.
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Inventors:
MAKINO TAKANORI (JP)
YAMAGUCHI TAKASHI (JP)
YAMAGUCHI TAKASHI (JP)
Application Number:
PCT/JP2018/039738
Publication Date:
May 02, 2019
Filing Date:
October 25, 2018
Export Citation:
Assignee:
NEWFREY LLC (US)
UNIV OSAKA CITY (JP)
UNIV OSAKA CITY (JP)
International Classes:
F16B13/06; F16B13/04; F16B37/04
Domestic Patent References:
| WO2017098016A1 | 2017-06-15 |
Foreign References:
| JP2017120096A | 2017-07-06 | |||
| JP2016133148A | 2016-07-25 | |||
| JPS59127911U | 1984-08-28 | |||
| JP2014530327A | 2014-11-17 | |||
| JP2009103311A | 2009-05-14 | |||
| JP2016142315A | 2016-08-08 | |||
| JPH0552324U | 1993-07-13 |
Attorney, Agent or Firm:
TANAKA Shinichiro et al. (JP)
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