Ejot Gmbh and Co. Kg

Ejot Baubefestigungen Gmbh

Ejot Se & Co. Kg

Frank Dratschmidt

Ralf Birkelbach

Ralph J Hellmig

Stephan Weitzel

Ilir Selimi

Michael Achenbach

Jan Hackler

Volker Dieckmann

Juergen Behle

Rene Gerber

Joachim Tiemann

Wolfgang Schaefer

Rene Achenbach

Wolfgang Schafer

René Gerber

The invention relates to a screw (IO) in order to cut a mating thread in a plastic article, comprising a lower threaded part (F) and an upper threaded part (T), the lower threaded part having a larger diameter and its tip covering a larger surface than the upper threaded part.

Screw for screwing into plastic

A self-tapping screw () comprising a drive () and a shank () bearing a thread comprising a main thread (), wherein the main thread () has a maximum main thread external diameter (D) and a cutting area (F) and a supporting area (T) following in the direction of the drive (), wherein the shank () has a threaded end () at an end opposite the drive (), with the screw end () having a diameter (DE) of at least 20% of the maximum main thread external diameter (D), The shank further has, in the region of the screw end (), a tap flute (), wherein the tap flute () comprises at least two tapping thread turns () which attain, in their external diameter (D), no more than 90% of the maximum main thread external diameter (D) and form a tap region in which the tapping thread turns () have the same diameter development, and in addition in that the diameter of the main thread () in the tap flute region (AB) is less than or equal to the diameter (D) of the tapping thread turns ().

Self-tapping screw

Fastening system () for fastening an attachment () to a substrate () with an insulation layer (), the fastening system () comprising an anchor bolt (), with a first area () for anchoring in the substrate (), a second area () to which the attachment () can be fastened, and a stop (), a mounting tool () to form an opening in the insulation layer (), and a sealing element () adapted to be disposed at the stop () after the mounting tool () has been removed and to seal the opening in the insulation layer () as well as a corresponding method.

System for fastening attachments to a substrate with an insulation layer

Growing community of inventors

Bad Berleburg, Germany

Frank Dratschmidt