Patents by Inventor Stefan Hackel

Stefan Hackel 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).

  • Screwing tool with a ratchet
    Patent number: 6058812
    Abstract: Screwing tool (1) with a handle (2), tool holding fixture (3) and ratchet (4), in which the ratchet has a pivotally mounted ratchet element (6) which has several catch cams (5), and a first stop bolt (7), in which stop bolt (7) can be engaged with ratchet element (6) by displacement in an axial direction (9) defined by axis of rotation (8), such that handle (2) can turn relative to the tool holding fixture (3) in a first direction of rotation and can be locked by form-fit in the opposite second direction of rotation.
    Type: Grant
    Filed: June 19, 1998
    Date of Patent: May 9, 2000
    Assignee: Robert Schroder GmbH & Co.
    Inventors: Andre Casel, Herbert Casel, Gerd Nebe, Stefan Hackel