Hilti Aktiengesellschaft

Hilti Aktiengesellschat

Juergen Wieser

Franz Huber

Josef Glogger

Thomas Doppelbauer

Franz-Xaver Huber

Jan Allaart

Pierre Hohmeier

Manfred Gahler

Martin Volker

Michael Radl

Simon Martin

Johan Lennartsson

A fastening element for hard constructional components such as concrete, masonry, and the like, includes a cylindrical base body () having an inwardly located engagement element () for the setting bit and formed as a through-opening () in the bottom section () which is provided at the first end of the base body, a receptacle () opening toward the second end (), remote from the first end and adjoining the engagement element () in a direction toward the second end (), and provided with load application means (); and a self-tapping thread () provided, at least regionwise, on an outer surface () of the base body ().

Fastening element for hard constructional components

An expansion dowel includes an anchor bolt () having a load application element () at a first end region () of the anchor bolt (), and an expansion part () at a second free end region () of the anchor bolt (), and an expansion sleeve () having an inner profile () with a region () having a surface roughness increasing in the direction of the first end region () of the anchor bolt (), with the expansion part () having a conical section () widening toward the second free end region () of the anchor bolt () for expanding the expansion sleeve ().

Expansion dowel

A thread-forming screw (), has a stem () with at least one thread () arranged, at least regionwise, over its circumference, and a plurality of cutting elements () arranged in a respective plurality of recesses () formed in the at least one thread (), with the cutting elements () having a hardness greater than a hardness of the at least one thread () and formed as weld beads received in the recesses ().

Thread-forming screw

A fastening element for hard constructional components includes a cylindrical base body (), a self-tapping thread () provided at least on a portion of an outer surface () of the base body () and having a runout () that is spaced from a first end () of the base body () to provide a thread-free section () on the outer surface () of the base body () and extending from the first end () in a direction of a second end () of the base body (), and an inwardly located engagement element () for a setting bit () arranged in a region of the thread-free section () and having an axial extent (F) smaller than an axial extent (E) of the thread-free section (), and a receptacle opening () that opens toward the second end () and adjoins the engagement element () in the direction of the second end (), and is provided with load application element ().

Growing community of inventors

Kaufering, Germany

Juergen Wieser