Patents by Inventor Michael Herlitzek

Michael Herlitzek 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).

  • Multispeed manual transmission
    Patent number: 7454991
    Abstract: A shiftable multispeed reverse transmission having one input shaft (1) and a plurality of countershafts (2, 3, 4, 5, 6, 7) and one output shaft (8). One of gears and/or idle gears being situated upon the countershafts (2, 3, 4, 5, 6, 7) for non-rotatably connection with the countershafts, via shiftable clutches, for gear and direction change. The reduction ratios being generated by spur pinion stages and at least one shiftable planetary stage (P).
    Type: Grant
    Filed: December 14, 2004
    Date of Patent: November 25, 2008
    Assignee: ZF Friedrichshafen AG
    Inventors: Gerhard Buck, Wolfgang Rebholz, Siegfried Stützle, Michael Riedhammer, Hugo Burkhart, Michael Herlitzek, Jürgen Legner, Jochen Schneider, Michael Thielmann, Roland Fischer
  • Multispeed manual transmission
    Publication number: 20070068294
    Abstract: A shiftable multispeed reverse transmission having one input shaft (1) and a plurality of countershafts (2, 3, 4, 5, 6, 7) and one output shaft (8). One of gears and/or idle gears being situated upon the countershafts (2, 3, 4, 5, 6, 7) for non-rotatably connection with the countershafts, via shiftable clutches, for gear and direction change. The reduction ratios being generated by spur pinion stages and at least one shiftable planetary stage (P).
    Type: Application
    Filed: December 14, 2004
    Publication date: March 29, 2007
    Inventors: Gerhard Buck, Wolfgang Rebholz, Siegfried Stutzle, Michael Riedhammer, Hugo Burkhart, Michael Herlitzek, Jurgen Legner, Jochen Schneider, Michael Thielmann, Roland Fischer
  • Gearbox
    Patent number: 5079965
    Abstract: The invention concerns a gearbox (9). On the gearbox is front-mounted a hydrodynamic torque converter (3). The gearbox (9) has hydraulically actuatable gear clutches (17, 18, 23 and 28) which are designed structurally alike. The gears (14, 15, 16, 19, 20, 21, 22, 24, 26 and 27) are in constant engagement with each other. In order to reduce the development of noise, the gears are high and helically toothed. The gearbox is especially suited for use in vehicles in which special importance is attached to comfortable riding. Such vehicles are, for instance, passenger cars and mobile homes.
    Type: Grant
    Filed: June 11, 1990
    Date of Patent: January 14, 1992
    Assignee: Zahnradfabrik Friedrichshafen AG
    Inventors: Fritz Leber, Michael Herlitzek