Patents by Inventor Renate Friedrichs

Renate Friedrichs 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: 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
  • Patent number: 4561992
    Abstract: An aerosol cleaning agent for textile surfaces, particularly for the cleaning of textile upholstery, contains a plasticized urea-formaldehyde resin foam, a propellant, an antisettling and suspending agent respectively and a liquid. In order to obtain improved cleaning action and improved removability from the article to be cleaned, the aerosol cleaning agent comprises approximately 65 to 75 wt % active substance. This active substance contains sodium-aluminum silicate suspended therein and buffered by acid to a pH of about 7-8--and the plasticized urea-formaldehyde resin foam has open-cell foam particles and is present in particle sizes between the limit values of about 0.005 and 0.120 mm and a density (in dry, non-comminuted condition) of about 50 plus or minus 10 kg/m.sup.3. Therefore it is possible to dispense with the addition of a moisture-retaining cation-active antistatic.
    Type: Grant
    Filed: January 27, 1983
    Date of Patent: December 31, 1985
    Assignee: Vorwerk & Co. Interholding GmbH
    Inventors: Wolfgang Troger, Otto Mesmer, Renate Friedrichs
  • Patent number: 4454627
    Abstract: A cleaning device operated in conjunction with a vacuum cleaner includes a housing which is composed of a motor housing accommodating a drive motor, a removable nozzle plate formed with a first individual nozzle and a second surface nozzle and enclosing a working tool with a brush, and an air-duct housing forming a suction duct connectable to the vacuum cleaner.
    Type: Grant
    Filed: November 16, 1981
    Date of Patent: June 19, 1984
    Assignee: Vorwerk & Co. Interholding GmbH
    Inventors: Hans-Peter Simm, Wieland Guhne, Christoph Hoesch, Renate Friedrichs