Anti-loosening metallic externally threaded fastener

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11835080
APP PUB NO 20210156414A1
SERIAL NO

17059427

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Abstract

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[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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Patent Owner(s)

Patent OwnerAddress
YAHATA HOLDINGS CORPORATION18 TENJIN HIGASHI YAMANOKOSHI KITANAGOYA-SHI 481-0036
WORLD LOCK CORPORATION402-345 KOU SHIRAHAMA-CHO HIMEJI-SHI 672-8023

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Haze, Yoshirou Himeji, JP 1 0
Suzuki, Noriyuki Kitanagoya, JP 236 2157

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