Patents by Inventor Jurgen Freitag

Jurgen Freitag 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: 7286922
    Abstract: The magnitude of torque which can be transmitted by a bypass clutch between the housing and the turbine of a torque converter between a prime mover, such as an engine, and an automatic transmission in the power train of a motor vehicle is selectively regulatable by a computerized regulating unit. The regulation involves the transmission of torque by the clutch in dependency upon the magnitude of the torque being transmitted by the output element of the engine and ascertaining as well as adaptively applying to the clutch a variable force so that the clutch can transmit a predetermined torque. This entails automatic selection of a minimum slip between a torque receiving and a torque transmitting part of the power train. Compensation, particularly long-range compensation, is carried out for the existence of possible differences between the predetermined and actual torques being transmitted by the clutch.
    Type: Grant
    Filed: February 22, 1995
    Date of Patent: October 23, 2007
    Assignee: LuK Getriebe-Systeme GmbH
    Inventors: Robert Fischer, Uwe Wagner, Jürgen Freitag, Johannes Braun, Anton Rink
  • Patent number: 6660426
    Abstract: This invention relates to a multi-cell storage battery including a housing and, enclosing the housing in gas-tight fashion, a housing cover assembly having an upper cover panel and a lower cover panel with a degassing duct between the upper and lower cover panels which encompasses a multiple array of interconnected, mutually matched labyrinth chambers, fluidically links all cells, opens out at a forward end into at least one gas vent, and is closed off by a spark suppressor.
    Type: Grant
    Filed: May 15, 2001
    Date of Patent: December 9, 2003
    Assignee: Accumulatorenwerke Hoppecke Carl Zoellner & Sohn GmbH & Co. KG
    Inventors: Werner Hampe, Jürgen Freitag, Wilhelm Cramer
  • Patent number: 6367605
    Abstract: The housing of a hydrokinetic torque converter in the power train between the engine and the transmission of a motor vehicle contains a lockup valve which can be engaged to transmit torque directly from the output element of the engine to the output member of the turbine in the housing. Engagement of the lockup clutch at a relatively low RPM of the engine and/or under certain other circumstances is prevented or minimized by the provision of one or more valves which are designed to establish or to at least partially seal one or more paths for direct flow of hydraulic fluid between two compartments forming part of a chamber in the housing of the torque converter and being disposed at opposite sides of the axially movable piston of the lockup clutch. The valve or valves can be designed to react in response to changing RPM of the housing of the torque converter, in response to changes of the temperature of hydraulic fluid in the housing and/or in response to changes of the viscosity of such fluid.
    Type: Grant
    Filed: July 20, 1998
    Date of Patent: April 9, 2002
    Assignee: LuK Getriebe-Systeme GmbH
    Inventors: Volker Middelmann, Jürgen Freitag, Marc Meisner
  • Publication number: 20020031699
    Abstract: This invention relates to a multi-cell storage battery with a housing and, enclosing the housing in gas-tight fashion, a housing cover assembly consisting of an upper and a lower cover panel (1, 2), with a degassing duct between the upper and lower cover panels (1, 2) which duct encompasses a multiple array of interconnected, mutually matched labyrinth chambers (5), fluidically links all cells, opens out at its forward end into at least one gas vent (6), and is closed off by a spark suppressor (8).
    Type: Application
    Filed: May 15, 2001
    Publication date: March 14, 2002
    Inventors: Werner Hampe, Jurgen Freitag, Wilhelm Cramer
  • Patent number: 5779012
    Abstract: The housing of a hydrokinetic torque converter in the power train between the engine and the transmission of a motor vehicle contains a lockup valve which can be engaged to transmit torque directly from the output element of the engine to the output member of the turbine in the housing. Engagement of the lockup clutch at a relatively low RPM of the engine and/or under certain other circumstances is prevented or minimized by the provision of one or more valves which are designed to establish or to at least partially seal one or more paths for direct flow of hydraulic fluid between two compartments forming part of a chamber in the housing of the torque converter and being disposed at opposite sides of the axially movable piston of the lockup clutch. The valve or valves can be designed to react in response to changing RPM of the housing of the torque converter, in response to changes of the temperature of hydraulic fluid in the housing and/or in response to changes of the viscosity of such fluid.
    Type: Grant
    Filed: August 5, 1997
    Date of Patent: July 14, 1998
    Assignee: Luk Getriebe-Systeme GmbH
    Inventors: Volker Middelmann, Marc Meisner, Jurgen Freitag
  • Patent number: 5778084
    Abstract: The invention concerns a loudspeaker with a diaphragm which is electromagnetically induced to vibrate and is made of a central dome-shaped part and a conical part surrounding the latter, and a phase-correction device, consisting of a cone fixed in the housing with its base side matching the shape of the diaphragm and of two rings surrounding the cone concentrically, between which there are sound paths from the diaphragm into the sound outlet area. The object of the invention is to smooth out the transmission characteristic of the loudspeaker named initially and to enlarge the transmissible frequency band with simple means.
    Type: Grant
    Filed: January 24, 1997
    Date of Patent: July 7, 1998
    Inventors: Martin Kling, Jurgen Freitag