BEFESTIGUNG

A self-tapping masonry screw comprises a shank 2 formed with a rolled helical groove 5 next to one or two helical ridges 6 & 7, and with a land 9 relative to which the ridge(s) is raised and the groove 5 is depressed, the axial width of the land being at least 4mm and at least 50% of the land di...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	BICKFORD, CHARLES, HOCKLEY, ESSEX, GB
Format:	Patent
Sprache:	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 MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS,WHEELS, RINGS, BARRELS, BALLS MECHANICAL ENGINEERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PERFORMING OPERATIONS PUNCHING METAL THERMAL INSULATION IN GENERAL TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	A self-tapping masonry screw comprises a shank 2 formed with a rolled helical groove 5 next to one or two helical ridges 6 & 7, and with a land 9 relative to which the ridge(s) is raised and the groove 5 is depressed, the axial width of the land being at least 4mm and at least 50% of the land diameter, and the helix angle of the ridge is at least 10 degrees.