Title:
BOLT
Document Type and Number:
WIPO Patent Application WO/2020/087347
Kind Code:
A1
Abstract:
A bolt (1), comprising a body (11), a head (12), and a threaded portion (13). The body (11) has a central axis (CA); the head (12) is provided on one end of the body (11); the threaded portion (13) spirally surrounds the central axis (CA) and is connected to the body (11); the threaded portion (13) has a bearing surface (131) facing the head (12); the bearing surface (131) is a surface having a continuous slope or has an inflection point (IP). The bearing surface (131) comprises a concave surface (131a), a convex surface (131b), and a bearing flank surface (131c); the concave surface (131a) touches the body (11); the convex surface (131b) is more distant from the body (11) than the concave surface (131a); one side of the convex surface (131b) is connected to the concave surface (131a) and the other side of the convex surface (131b) is connected to the bearing flank surface (131c).
Inventors:
CHU YU-REN (CN)
HSIEH CHIH-LUNG (CN)
HSIEH CHIH-LUNG (CN)
Application Number:
PCT/CN2018/113010
Publication Date:
May 07, 2020
Filing Date:
October 31, 2018
Export Citation:
Assignee:
CHUN YU WORKS & CO LTD (CN)
International Classes:
F16B39/30; F16B39/22
Foreign References:
| JPH11117929A | 1999-04-27 | |||
| CN203201984U | 2013-09-18 | |||
| DE102010037757A1 | 2012-03-29 |
Other References:
See also references of EP 3667109A4
Attorney, Agent or Firm:
BEIJING ADVANCE PATENT & TRADEMARK LIMITED (CN)
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