Patents by Inventor Chad E. Schoneman

Chad E. Schoneman 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).

  • HYDROSTATIC TRANSMISSION CONTROL SYSTEM
    Publication number: 20240133464
    Abstract: A hydrostatic transmission control system includes a controller that monitors inputs for shifting a transmission of a tractor to a different range gear; determines if an engine on the tractor is operating in a desired and acceptable shift range based on a sensed speed and a load of the engine, and determines if a hydrostatic transmission on the tractor is operating in a desired and acceptable shift range based on a sensed load and a speed of the hydrostatic transmission. If the controller determines the engine and the hydrostatic transmission are operating in the desired and acceptable shift range, the controller commands an oncoming clutch to ramp up and an off going clutch to ramp down, and synchronizes speeds of the engine and the hydrostatic transmission.
    Type: Application
    Filed: October 23, 2022
    Publication date: April 25, 2024
    Inventors: JOHN P. KRUCKEBERG, MARK A. HERMAN, DAVID L. SPRINKLE, HARRY K. VOELP, IV, TEJAL SARDA, Julie B. Kuyath, STEVEN P. FORSSBERG, CHAD E. SCHONEMAN
  • ELECTROHYDRAULIC ACTUATOR FOR HYDROSTATIC TRANSMISSION
    Publication number: 20190128411
    Abstract: An electrohydraulic actuator for a hydrostatic transmission includes a pair of pressure control valves between a hydraulic pressure inlet line and a pair of passages to a cylinder. A piston is positioned in the cylinder between the pair of passages and is slidable in response to hydraulic pressure in the cylinder on each side of the piston. A piston rod connects the piston to a joint which is connected to the trunnion lever of the hydrostatic transmission. A pedal position sensor provides electrical signals to an electronic controller that selectively actuates the pair of pressure control valves.
    Type: Application
    Filed: October 31, 2017
    Publication date: May 2, 2019
    Inventors: Christopher McCord, Larry D. Claussen, Kannan Panchakshar, David L. Sprinkle, Douglas Van Meter, Chad E. Schoneman, John P. Kruckeberg
  • PTO clutch with lubrication oil shut-off valve and integrated relief valve
    Patent number: 7694794
    Abstract: A PTO clutch includes a lubrication shut-off valve that can slide between a first position blocking a port for lubrication oil to lubricate the PTO clutch, and a second position opening the port to lubricate the clutch. A relief valve is provided in the lubrication shut off valve, which opens in response to pressure spikes of activation oil and isolates the pressure spikes from the clutch piston.
    Type: Grant
    Filed: May 29, 2007
    Date of Patent: April 13, 2010
    Assignee: Deere & Company
    Inventors: Brian E. Biles, Craig A. Puetz, Chad E. Schoneman
  • PTO Clutch With Lubrication Oil Shut-Off Valve And Integrated Relief Valve
    Publication number: 20080296115
    Abstract: A PTO clutch includes a lubrication shut-off valve that can slide between a first position blocking a port for lubrication oil to lubricate the PTO clutch, and a second position opening the port to lubricate the clutch. A relief valve is provided in the lubrication shut off valve, which opens in response to pressure spikes of activation oil and isolates the pressure spikes from the clutch piston.
    Type: Application
    Filed: May 29, 2007
    Publication date: December 4, 2008
    Inventors: Brian E. Biles, Craig A. Puetz, Chad E. Schoneman