Patents by Inventor Hans-Jurgen Kriegel

Hans-Jurgen Kriegel 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).

  • Patent number: 5815934
    Abstract: A handheld powered planer is provided with a receiving chamber (25) with a chips redirecting surface (51) next to the drum compartment (18) for the cutter drum (15). The receiving chamber (25) is connected via an inlet opening (28) to the drum compartment (18) and via a lateral outlet opening (26, 27) to the outside. The chips redirecting surface (51) is inclined in an ascending manner in the direction of the outlet opening. Air passage openings (53) are located in the inclined chips redirecting surface (51) and are connected via an air channel (30) to the motor compartment (19) of the planer housing (1) so that an air flow from the fan wheel (11) of the drive motor (8) passes through the air passage openings (53) and flows in the direction of the outlet openings (26, 27). Chip removal is significantly improved as a result of this.
    Type: Grant
    Filed: March 21, 1997
    Date of Patent: October 6, 1998
    Assignee: Black & Decker Inc.
    Inventors: Gert Eichberger, Hans-Jurgen Kriegel, Karl Schmid
  • Patent number: 5094000
    Abstract: A hand-held power tool with a rotary driven tool, in particular a planer or a circular saw, is arranged so that on switching off the drive, which can be switched on and off by means of a trigger (15), a brake element (34), which is ineffective when the drive is switched on, is brought into braking engagement with a brake part (51) rotatingly driven by the drive. The tool comprises a safety element (21) which co-operates with the trigger (15) and which can be displaced between a safety position in which the trigger (15) cannot be moved to switch on the drive, and a release position in which the trigger (15) can be moved into the position to switch on the drive. The safety element (21) is urged by spring pressure towards the safety position and is held in the release position when the trigger (15)L is in the switch-on position.
    Type: Grant
    Filed: March 1, 1991
    Date of Patent: March 10, 1992
    Assignee: Black & Decker Inc.
    Inventors: Reimund Becht, Hans-Jurgen Kriegel, Tayfun S. Thielmann