Patents by Inventor Hans-Joachim Birr

Hans-Joachim Birr 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: 4989295
    Abstract: The invention is directed to a telescopic guide wand for floor-cleaning apparatus such as household vacuum cleaners. The guide wand includes two concentrically arranged tubes which telescopically engage each other and conjointly define an inner space to accommodate the electrical supply cable for the motor blower head of the vacuum cleaner. The tubes are latched with respect to each other in several steps and the supply cable extends as helically configured cable within the upper portion of the wand. The supply cord extends concentrically out of the end of the upper tube which is configured as a handle and can be connected to the house electrical supply system. The end of the guide wand facing toward the apparatus has a connecting device disposed thereon.
    Type: Grant
    Filed: May 7, 1990
    Date of Patent: February 5, 1991
    Assignee: Vorwerk & Co. Interholding GmbH
    Inventors: Wieland Guhne, Peter Hannemann, Hans-Joachim Birr, Jurgen Jager
  • Patent number: 4846426
    Abstract: The invention relates to a hang-up and protective arrangement for an electrical appliance such as a vacuum cleaner or carpet cleaning apparatus having a guide wand. The guide wand is equipped with a handle having an end portion with an opening formed therein from which an electrical cable passes from the handle. A U-shaped bracket has respective legs which are pivotally connected to the end portion of the handle so as to straddle the cable. The bracket can pivot between a pivoted-out position whereat the bracket can be hanged on a wall-mounted hook and a pivoted-in position.
    Type: Grant
    Filed: June 13, 1988
    Date of Patent: July 11, 1989
    Assignee: Vorwerk & Co. Interholding GmbH
    Inventors: Peter Hannemann, Uwe Kemker, Hans-Joachim Birr, Wieland Guhne
  • Patent number: 4785492
    Abstract: The invention is directed to a floor cleaning apparatus which includes a nozzle-like structure for a vacuum cleaner. The apparatus is for vacuum cleaning and polishing hard floors and is moved by the operator in a desired direction. The apparatus includes a chassis defining a longitudinal axis and at least two working plates for working on the surface of the hard floor. The working plates are movably mounted on the chassis so as to perform respective reciprocal movements counter to each other and in a direction ninety degrees to the desired direction in which the apparatus is moved by the operator. The plates conjointly define a total depth extending in the direction of the longitudinal axis of the chassis and work plate takes up one-third of this depth. The other one of the work plates takes up two-thirds of this depth. The work plates have a flat shape and at least one of the work plates is pervious to air.
    Type: Grant
    Filed: November 4, 1987
    Date of Patent: November 22, 1988
    Assignee: Vorwerk & Co. Interholding GmbH
    Inventors: Wieland Guhne, Uwe Kemker, Wolfgang Troger, Hans-Joachim Birr, Paul Michel, Renate Friedrichs