SLACK PREVENTIVE FASTENER FOR SCREW TOOL, AND METHOD AND DEVICE FOR MANUFACTURING THE SAME

Title:

SLACK PREVENTIVE FASTENER FOR SCREW TOOL, AND METHOD AND DEVICE FOR MANUFACTURING THE SAME

Document Type and Number:

WIPO Patent Application WO/2007/058049

Kind Code:

A1

Abstract:

Disclosed are a slack preventive fastener for a screw tool formed in a relatively simple structure, easily manufacturable at low cost by mass production, and capable of easily and securely preventing a screw tool from being loosened as a fastener for a screw tool miniaturized or refined by precise processing for assembling various types of small-sized products; and a method and a device for manufacturing the fastener. The fastener comprises a fastening device (10) such as a nut, an insert, etc. to be fastened with the screw device such as a screw, a bolt, etc. A recessed part (18) formed by press-molding from the outside is provided in a part of the outer peripheral wall of the fastening device to form a diameter-reduced deformation part (20) where the diameter of the crest or bottom of a female thread is partially reduced in the inner peripheral wall of the fastening device.

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Inventors:

TOTSU KATSUYUKI (JP)

Application Number:

PCT/JP2006/320916

Publication Date:

May 24, 2007

Filing Date:

October 20, 2006

Export Citation:

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Assignee:

TOTSU KATSUYUKI (JP)

International Classes:

F16B39/284; F16B39/30

Foreign References:

JPS5429265U	1979-02-26
JPS5923117A	1984-02-06
JP2002307561A	2002-10-23
JP2001304219A	2001-10-31
GB1267144A	1972-03-15
US3391721A	1968-07-09
US3139636A	1964-07-07

Other References: