Patents by Inventor Joachim Bahnemann

Joachim Bahnemann 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: 4979260
    Abstract: A hand-guided sweeper employing a rotary brush to propel debris into a detachable hopper, a blower to facilitate pickup of dust and a filter to remove dust prior to passing through the blower includes guides on the frame of the sweeper adapted to cooperate with projections on the sides of the hopper, permitting the hopper to be inserted and removed from the front of the sweeper without notable lifting and interference to the blower and filter.
    Type: Grant
    Filed: December 15, 1988
    Date of Patent: December 25, 1990
    Assignee: Hako-Werke GmbH
    Inventors: Heinz Holsten, Joachim Bahnemann
  • Patent number: 4974283
    Abstract: A hand-guided sweeping machine has a filter housing pivotally mounted to tilt about an axis to facilitate shaking the filter free of dust. The filter housing outlet is in sealing registry with the blower intake when the housing is lowered, and is moved out of sealing registry when the housing is raised. In the raised position, the filter housing covers the hopper opening so that debris from the filter housing will continue to fall into the hopper. A flap-like sealing arrangement surrounds the filter housing inlet to prevent dust from entering the internal mechanism of the sweeper.
    Type: Grant
    Filed: December 15, 1988
    Date of Patent: December 4, 1990
    Assignee: Hako-Werke GmbH & Co.
    Inventors: Heinz Holsten, Joachim Bahnemann