Hilti Aktiengesellschaft

Claudia Zimmerer

Franz Popp

Heinz Bisping

J&uuml;rgen Wieser

Erich Daigeler

Alois K&ouml;lbl

Alois Koelbl

Michael Spröwitz

An expanding screw for an expandable dowel sleeve () has a shaft () having a rotation-transmitting element () provided at its first end (), at least one first screw thread () extending from its second end (), and a thread section () provided in a region of the at least one first thread (), spaced from the second end (), and having at least one further screw thread ().

Expanding screw

A method of manufacturing of an expansion sleeve including providing a sleeve blank having axially extending material weaknesses ( ), and forming the longitudinal slots ( ) by tearing open the material weaknesses ( ) by substantially radially expanding same.

Method of manufacturing an expansion sleeve

An expansion dowel having a cylindrical expansion body ( ) having a through-bore ( ) and formed of at least two segments ( ) connected with each other, an additional expansion element ( ) located in a recess ( ) formed in an outer profile ( ) of the expansion member ( ) and having a radial depth of the recess ( ) diminishing in a setting direction (S) of the expansion dowel; the additional expansion element ( ) having a radial extent at least partially greater than a maximal dept of the recess ( ).

Expansion dowel

Growing community of inventors

Augsburg, Germany

Claudia Zimmerer