Head of a countersunk screw

The invention relates to the head of a countersunk screw with a lower side which has at least one supporting surface, which forms part of a rotational surface about the screw axis and can nestle against a correspondingly contoured countersunk surface of an add-on part, and has at least one depressio...

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Bibliographic Details
Main Author HETTICH ULRICH
Format Patent
LanguageEnglish
Published 25.12.2012
Subjects
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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Summary:The invention relates to the head of a countersunk screw with a lower side which has at least one supporting surface, which forms part of a rotational surface about the screw axis and can nestle against a correspondingly contoured countersunk surface of an add-on part, and has at least one depression which is delimited by a cutting edge at its end which runs downwards, as seen in the screwing-in direction of the countersunk screw. The invention is distinguished in that in front of the supporting surface, as seen in the screwing-in direction, there is an approach surface which butts against said supporting surface, is inclined radially inwards and, at its upwardly running, free end, has the cutting edge which, over its length, maintains a radial distance from the rotational surface to the inside.
Bibliography:Application Number: US20080525607