Patents by Inventor James E. Shellberg

James E. Shellberg 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: 4031762
    Abstract: A known family of multi-speed constant-mesh gear reversible powershift transmissions has a basic structure that includes a plurality of drivingly connected shafts, with all of these shafts lying in a common plane. A plurality of gear trains selectively drives the output shaft at various speed ratios, and pluralities of clutches are used for connecting several of the shafts and for connecting various ones of the gears to various shafts for conjoint rotation therewith. The improvement resides in the modification of an inline transmision to a drop-type transmission which permits the interposition of a power takeoff shaft that is operatively connected to and axially aligned with the input shaft.
    Type: Grant
    Filed: July 30, 1975
    Date of Patent: June 28, 1977
    Assignee: Clark Equipment Company
    Inventor: James E. Shellberg