Patents by Inventor Bernhard Drerup

Bernhard Drerup 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).

  • Automatic transmission for motor vehicles
    Patent number: 6572507
    Abstract: The invention concerns a transmission (1) with automatic shifting capabilities and with three spider supported planetary sets (2, 3, 4), three brakes (5, 6, 7), and two clutches (8, 9) for the shifting of six forward moving gears and one reverse gear and having an input shaft (10) and an output shaft (11). In this way, the input shaft (10) is in continual connection with the sun gear (16) of the second planetary set (3) and the input shaft (10) is connectable to the sun gear (12) of the first planetary set (2) by means of the first clutch (8) and/or by means of the second clutch (9) is also connectable with the spider (15) of the first planetary set (2). Further, the sun gear (12) of the first planetary set (2) by means of the first brake (5) and or the spider (15) of the first planetary set (2) by means of the second brake (6) and/or the sun gear (20) of the third planetary set (4) by means of the third brake, are all connectable with the housing of the transmission.
    Type: Grant
    Filed: September 13, 2001
    Date of Patent: June 3, 2003
    Assignee: ZF Friedrichshafen AG
    Inventors: Bülent Korkmaz, Walter Kuhn, Hans-Jörg Domian, Bernhard Drerup, Gerhard Gumpoltsberger
  • Automatic transmission for motor vehicles
    Patent number: RE39960
    Abstract: The invention concerns a transmission (1) with automatic shifting capabilities and with three spider supported planetary sets (2, 3, 4), three brakes (5, 6, 7), and two clutches (8, 9) for the shifting of six forward moving gears and one reverse gear and having an input shaft (10) and an output shaft (11). In this way, the input shaft (10) is in continual connection with the sun gear (16) of the second planetary set (3) and the input shaft (10) is connectable to the sun gear (12) of the first planetary set (2) by means of the first clutch (8) and/or by means of the second clutch (9) is also connectable with the spider (15) of the first planetary set (2). Further, the sun gear (12) of the first planetary set (2) by means of the first brake (5) and or the spider (15) of the first planetary set (2) by means of the second brake (6) and/or the sun gear (20) of the third planetary set (4) by means of the third brake, are all connectable with the housing of the transmission.
    Type: Grant
    Filed: March 16, 2000
    Date of Patent: December 25, 2007
    Assignee: ZF Friedrichshafen AG
    Inventors: Bülent Korkmaz, Walter Kuhn, Bernhard Drerup, Hans-Jorg Domian, Gerhard Gumpoltsberger