LOOSENING PREVENTION THREADED FASTENER

The present invention is intended to provide a novel loosening prevention threaded fastener in which loosening of a fastening portion can be prevented in a reliable manner, without using an adhesive agent, and besides, the strength of fastening can be made large, and which can still be used in a rep...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	MORI Shigeto, OKAMURA Yousuke, TOZAWA Shunji
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS ORMACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS,CLIPS, WEDGES, JOINTS OR JOINTING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MECHANICAL ENGINEERING THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	The present invention is intended to provide a novel loosening prevention threaded fastener in which loosening of a fastening portion can be prevented in a reliable manner, without using an adhesive agent, and besides, the strength of fastening can be made large, and which can still be used in a repeated manner. The present invention has a construction in which a clearance side protrusion portion protruding radially outwardly toward a clearance flank surface of a female screw thread is formed on a clearance flank surface of a male screw thread, and the clearance side protrusion portion is constructed such that a tip end portion thereof interferes with the clearance flank surface of the female screw thread, in a state where a pressure flank surface of the male screw thread is in contact with a clearance flank surface of the female screw thread, wherein at the time of screw fastening, the crest end portion of the clearance side protrusion portion is pushed to the pressure flank surface of the female screw thread so that it is deformed in a deflective manner to apply a predetermined contact pressure to a contact surface due to its elastic restoring force, thus providing resistance against a loosening direction.