Patents by Inventor Kurt O. Francke

Kurt O. Francke 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).

  • Vacuum cleaner combination latch and electrical contact arrangement
    Patent number: 4809398
    Abstract: A locking device for a pivotable cover of a vacuum cleaner, which includes at least one locking catch that engages a complementary locking means in order to lock the cover in closed position. The catch is further provided with an electric contact means which during the closing of the cover abuts a corresponding contact means in order to close an electric circuit.
    Type: Grant
    Filed: January 13, 1988
    Date of Patent: March 7, 1989
    Assignee: Aktiebolaget Electrolux
    Inventors: Tommy N. Linduist, Milos Vukotic, Ann-Christine Hedin, Kurt O. Francke
  • Noise reduction arrangement for a vacuum cleaner
    Patent number: 4773118
    Abstract: In a vacuum cleaner comprising a suction fan and a motor for driving the fan, a noise reduction wall construction is provided in front of and spaced from the inlet of the fan. The wall construction comprises two parallel, mutually spaced wall panels which by means of intermediate spacer means are firmly interconnected to form a rigid unit.
    Type: Grant
    Filed: January 11, 1988
    Date of Patent: September 27, 1988
    Assignee: Aktiebolaget Electrolux
    Inventors: Tommy N. Lindquist, Milos Vukotic, Ann-Christine Hedin, Kurt O. Francke, Gunnar Lundmark
  • Blocking device for a vacuum cleaner
    Patent number: 4766639
    Abstract: In a vacuum cleaner having a disposable dust bag of the kind comprising an attachment plate of cardboard or the like, and a cover adapted to be opened for the replacement of the dust bag, a blocking device is provided which is adapted to prevent closing of the cover when the dust bag is missing. The blocking device includes a slide actuated by a spring to be moved to a first position in which the closing of the cover is prevented, and a toggle-joint mechanism adapted to be actuated by the attachment plate to move the slide to a second position for permitting closing of the cover.
    Type: Grant
    Filed: January 11, 1988
    Date of Patent: August 30, 1988
    Assignee: Aktiebolaget Electrolux
    Inventors: Nils T. Lindquist, Ann-Christine Hedin, Kurt O. Francke, Milos Vukotic
  • Split pulley
    Patent number: 4506559
    Abstract: The invention proposes to form the flanges (11,12) of a driving pulley as a part of the driving shaft (10), for example by moulding the shaft (10) and the flanges (11,12) so as to constitute one unit, the portions (18,19) of the driving pulley being attachable between the said flanges (11,12).
    Type: Grant
    Filed: October 25, 1982
    Date of Patent: March 26, 1985
    Assignee: Aktiebolaget Electrolux
    Inventors: Kurt O. Francke, Sten T. Strand