Title:
ANTI-LOOSENING METALLIC MALE SCREW
Document Type and Number:
WIPO Patent Application WO/2019/244759
Kind Code:
A1
Abstract:
[Problem] The purpose of the present invention is to provide an anti-loosening metallic male screw that can exhibit a sufficient anti-loosening effect by forming a flat part and a short slope in a part of the thread bottom of the male screw and thus ensuring pressure contact between a thread peak of a female screw and the slope at the thread bottom of the male screw. [Solution] An anti-loosening metallic male screw according to the present invention is to be engaged with a female screw for a metric screw, and is characterized in that the cross-sectional shape of the thread bottom of the metallic male screw is formed into a flat shape in which a non-pressurized flank side thereof is parallel to the axis of the male screw, is formed into a shape in which a pressurized flank side thereof is sloped toward the pressurized flank side with respect to an extension line of the flat part, and the outer diameter and the effective radial size of the metallic male screw are smaller than the reference sizes of the metric screw.
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Inventors:
SUZUKI NORIYUKI (JP)
HAZE YOSHIROU (JP)
HAZE YOSHIROU (JP)
Application Number:
PCT/JP2019/023428
Publication Date:
December 26, 2019
Filing Date:
June 13, 2019
Export Citation:
Assignee:
YAHATA NEJI CORP (JP)
WORLD LOCK CORP (JP)
WORLD LOCK CORP (JP)
International Classes:
F16B39/30; F16B33/02
Domestic Patent References:
| WO2017187383A1 | 2017-11-02 |
Foreign References:
| US20170030393A1 | 2017-02-02 | |||
| JP2016524681A | 2016-08-18 | |||
| JP2014037893A | 2014-02-27 |
Attorney, Agent or Firm:
HONMA Masanori et al. (JP)
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