Patents by Inventor James M. Travis

James M. Travis 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: 4270622
    Abstract: An electric powered vehicle drive axle is disclosed. The axle of the present invention comprises a ring gear; a first pinion gear for rotating the ring gear; a differential carried by the ring gear; a pair of axle shafts driven by the differential for rotatably driving a pair of drive wheels; the device supported and enclosed by a housing. A second pinion gear is employed which rotatably engages the ring gear. A first electric motor rotatably connected to the first pinion gear is connected to a power source for rotatably driving the vehicle. A second electric motor/generator is connected to the second pinion gear and electrically connected to the power source. The second electric motor/generator selectively powers the differential or derives power from the differential to recharge the power source as dictated by the power needs of the electric vehicle. A plurality of bevel gears are deployed along the length of the axles.
    Type: Grant
    Filed: June 27, 1979
    Date of Patent: June 2, 1981
    Inventor: James M. Travis