The invention relates to a concrete screw anchor comprising a shank, a head connected to the shank, an integral washer, which is arranged axially between the head and the shank, and which has an underhead surface, and at least one thread helix, which is arranged on the shank, wherein the head comprises external drive flats for wrench socket engagement. According to the invention, the underhead surface has a bulging clamping section for lifting clutch engagement.
CONCRETE SCREW WITH INTEGRATED WASHER WITH BULGING UNDERHEAD SURFACE
BETONSCHRAUBE MIT INTEGRIERTER UNTERLEGSCHEIBE MIT GEWÖLBTER UNTERKOPFOBERFLÄCHE
VIS À BÉTON AVEC RONDELLE INTÉGRÉE AYANT UNE SURFACE DE SOUS-TÊTE RENFLÉE
2022-05-04
Patent
Electronic Resource
English
IPC: | E04G SCAFFOLDING , Baugerüste / B66C Krane , CRANES / F16B DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES , Vorrichtungen zum Befestigen oder Sichern von Konstruktionselementen oder Maschinenteilen, z.B. Nägel, Bolzen, Schrauben, Sprengringe, Klemmen, Klammern oder Keile |
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