Patents by Inventor Alois Koelbl

Alois Koelbl has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method of manufacturing an expansion sleeve
    Patent number: 6755747
    Abstract: A method of manufacturing of an expansion sleeve including providing a sleeve blank having axially extending material weaknesses (9), and forming the longitudinal slots (5) by tearing open the material weaknesses (9) by substantially radially expanding same.
    Type: Grant
    Filed: August 7, 2002
    Date of Patent: June 29, 2004
    Assignee: Hilti Aktiengesellschaft
    Inventors: Jürgen Wieser, Claudia Zimmerer, Heinz Bisping, Alois Koelbl, Erich Daigeler
  • Expansion dowel
    Patent number: 6712572
    Abstract: An expansion dowel having a cylindrical expansion body (1) having a through-bore (3) and formed of at least two segments (4a, 4b) connected with each other, an additional expansion element (7) located in a recess (8) formed in an outer profile (6) of the expansion member (1) and having a radial depth of the recess (8) diminishing in a setting direction (S) of the expansion dowel; the additional expansion element (7) having a radial extent at least partially greater than a maximal dept of the recess (8).
    Type: Grant
    Filed: July 12, 2002
    Date of Patent: March 30, 2004
    Assignee: Hilti Aktiengesellschaft
    Inventors: Heinz Bisping, Alois Kölbl, Jürgen Wieser, Claudia Zimmerer
  • Method of manufacturing an expansion sleeve
    Publication number: 20030060296
    Abstract: A method of manufacturing of an expansion sleeve including providing a sleeve blank having axially extending material weaknesses (9), and forming the longitudinal slots (5) by tearing open the material weaknesses (9) by substantially radially expanding same.
    Type: Application
    Filed: August 7, 2002
    Publication date: March 27, 2003
    Inventors: Jurgen Wieser, Claudia Zimmerer, Heinz Bisping, Alois Koelbl, Erich Daigeler
  • Dowel
    Patent number: 6238128
    Abstract: A dowel including an anchor rod (2) provided at front, in a setting direction, end with a head portion (4) widening in the setting direction, and a sleeve (5) having a through-bore and axially displaceable along the anchor rod, with the sleeve (5) having, at its end adjacent to the head portion (4) an expansion region (6) formed by a plurality of expansion tabs (7) separated from each other by substantially axially extending slots (8) and radially expandable upon a relative displacement of the sleeve (5) and the anchor rod (2), and a sleeve section adjoining the expansion region (6) and having, in its rear end region (10), a larger diameter (G) than in its front end region (12) adjoining the expansion region (6), with the sleeve section having a narrowing intermediate region (11) extending between the rear end region (10) and the front end region (12) and having a smallest outer diameter (M) which is smaller than an outer diameter (F) in the front end region (12).
    Type: Grant
    Filed: April 23, 1999
    Date of Patent: May 29, 2001
    Assignee: Hilti Aktiengesellschaft
    Inventors: Werner Kaibach, Stefan Raber, Hans-Jürgen Negele, Alois Kölbl, Ulrich Genschmer