Patents by Inventor Jeffrey T. Knapp

Jeffrey T. Knapp 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).

  • Self-propelled vehicles including a differential system
    Patent number: 10953918
    Abstract: Self-propelled vehicles that include swiveling caster wheels and independent drive wheels are disclosed. The self-propelled vehicles are selectively steered in a caster wheel steering mode or a drive wheel steering mode. The vehicle includes a differential system that may include a differential valve that allows hydraulic fluid to be transferred between the left and right drive systems. The differential system may be operable during the caster wheel steering mode such as when the vehicle is driven for transport between sites.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: March 23, 2021
    Assignee: Vermeer Manufacturing Company
    Inventors: Curt T. Graham, Nathan D. Dockter, Kent M. Recker, Gary J. Burns, Kent L. Thompson, Scott A. Rempe, Jeffrey T. Knapp
  • Self-Propelled Vehicles Including A Differential System
    Publication number: 20190126748
    Abstract: Self-propelled vehicles that include swiveling caster wheels and independent drive wheels are disclosed. The self-propelled vehicles are selectively steered in a caster wheel steering mode or a drive wheel steering mode. The vehicle includes a differential system that may include a differential valve that allows hydraulic fluid to be transferred between the left and right drive systems. The differential system may be operable during the caster wheel steering mode such as when the vehicle is driven for transport between sites.
    Type: Application
    Filed: May 19, 2017
    Publication date: May 2, 2019
    Inventors: Curt T. Graham, Nathan D. Dockter, Kent M. Recker, Gary J. Burns, Kent L. Thompson, Scott A. Rempe, Jeffrey T. Knapp