Patents by Inventor Siegfried Leutner

Siegfried Leutner 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).

  • Liquid friction clutch
    Patent number: 7318510
    Abstract: A drive for a cooling fan at motor vehicles including a main cooling circuit and at least one secondary cooling circuit using a fluid friction clutch including a control element for the drive of the cooling fan is described. In case of a plurality of cooling circuits, such fluid friction clutches do not react as desired by actuating the cooling fan. To prevent this disadvantage, a drive for a cooling fan being drivable by a fluid friction clutch is to be provided, in which the cooling fan starts operation as soon as there is a requirement in at least one of the cooling circuits.
    Type: Grant
    Filed: January 11, 2001
    Date of Patent: January 15, 2008
    Assignee: AGCO GmbH & Co
    Inventors: Hans Heinle, Siegfried Leutner
  • Liquid friction clutch
    Publication number: 20020005328
    Abstract: A drive for a cooling fan at motor vehicles including a main cooling circuit and at least one secondary cooling circuit using a fluid friction clutch including a control element for the drive of the cooling fan is described.
    Type: Application
    Filed: January 11, 2001
    Publication date: January 17, 2002
    Inventors: Hans Heinle, Siegfried Leutner