Patents by Inventor Hans-Jurgen Drewitz

Hans-Jurgen Drewitz 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: 4342370
    Abstract: An articulated omnibus having a two-axle leading member, a single-axle trailing member, and an engine aft of the trailing member axle. The forward wheelbase between the front and center axles is approximately equal to the rear wheelbase between the center and rear axles. The front overhang is about 1/6 to 1/7 of the forward wheelbase, and the rear overhang is about 1/2 to 1/3 of the forward wheelbase. Passenger entrances near the front and center axles have thresholds lower than the central portion of the forward member. A driver's seat and compartment are located above the front axle.
    Type: Grant
    Filed: March 30, 1979
    Date of Patent: August 3, 1982
    Assignee: M.A.N. Maschinenfabrik Augsburg-Nuernberg AG
    Inventors: Faust Hagin, Hans-Jurgen Drewitz
  • Patent number: 4216684
    Abstract: The present hybrid drive is especially suitable for buses and the like which must make frequent stops. The engine, clutch, and automatic transmission are arranged in series. A flywheel energy storing device is coupled to the drive train by a further clutch. The automatic transmission is a power distribution transmission including a mechanical power transmission branch and a hydraulic power transmission branch. An auxiliary power take-off connects the flywheel to the drive train. The auxiliary power take-off is arranged laterally adjacent to the transmission. The connection point between the transmission and the auxiliary drive is constructed to take up power which, in addition to the engine power, is re-circulating through the hydraulic branch and which flows into the mechanical branch.
    Type: Grant
    Filed: September 12, 1977
    Date of Patent: August 12, 1980
    Assignee: Maschinefabrik Augsburg-Nuenberg Aktiengesellschaft
    Inventors: Faust Hagin, Hans Hagen, Hans-Jurgen Drewitz, Erich Knirsch, Paul Merker