ANTI-LOOSENING SCREW - FUKUI BYORA CO LTD

Title:

ANTI-LOOSENING SCREW

Document Type and Number:

WIPO Patent Application WO/2006/006439

Kind Code:

A1

Abstract:

[PROBLEMS] An anti-loosening screw sufficiently biting into a female screw in tightening to increase the amount of engagement, increasing frictional force between itself and the female screw. The anti-loosening screw can achieve excellent anti-loosening effect for a long period. [MEANS FOR SOLVING PROBLEMS] An anti-loosening screw has a head section (1) and a shaft section (2). At least one thread (3) formed on the shaft section has a crushed thread section (4) formed by crushing a part of the at least one thread. The width of the thread at the crushed thread section is greater than the width at the same height of a thread not crushed and is suddenly narrowed after gradually widened in the rotation direction of the screw.

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Inventors:

MORISE TOSHIMITSU (JP)
WATANABE HIROSHI (JP)
HASHIMOTO HIROFUMI (JP)
NOZAKI YUKIO (JP)

Application Number:

PCT/JP2005/012345

Publication Date:

January 19, 2006

Filing Date:

July 04, 2005

Export Citation:

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Assignee:

FUKUI BYORA CO LTD (JP)
MORISE TOSHIMITSU (JP)
WATANABE HIROSHI (JP)
HASHIMOTO HIROFUMI (JP)
NOZAKI YUKIO (JP)

International Classes:

F16B39/30; (IPC1-7): F16B39/30

Foreign References:

JP3002824U	1994-10-04
JPS5849013U	1983-04-02
JP2004150618A	2004-05-27
JPH10246216A	1998-09-14
JP2003335105A	2003-11-25
JP3014045U	1995-08-01
JPS588816A	1983-01-19
JPS53155963U	1978-12-07

Other References: