SCREW

PROBLEM TO BE SOLVED: To eliminate a defect of a screw that the screw easily comes off a plate in a former screw having a single-start thread in which one screw thread continues, if the plate to be joined and fastened is thin, because thickness biting in thickness surface of the plate and contact su...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	OUCHI KATSUHIRO
Format:	Patent
Sprache:	eng
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:	PROBLEM TO BE SOLVED: To eliminate a defect of a screw that the screw easily comes off a plate in a former screw having a single-start thread in which one screw thread continues, if the plate to be joined and fastened is thin, because thickness biting in thickness surface of the plate and contact surface get less and thereby screw part gets less as the plates get thinner although the screw thread bites in the thickness surface of the plates to prevent the screw from coming off the plate. SOLUTION: In the screw 5 provided with a screw part 10 on a shaft 11 and provided with a boring part 14 on one side and a head part 16 on another side, the screw part 10 is provided with a hollow part 22 from an upper part of the screw thread composed of peaks and valleys toward the shaft 11 and forms the screw thread 20a and the screw thread 20b of the screw. COPYRIGHT: (C)2010,JPO&INPIT