Patents by Inventor Aaron Tollefsrud

Aaron Tollefsrud 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: 11357224
    Abstract: An agricultural product application implement includes a system and method for indicating an amount of fluid stored. A pressure transducer installed at the sump of a fluid tank electronically measures and displays a fluid depth. Instrumentation, such as an instrument cluster unit for the implement, is programmed via software to convert the voltage output of the pressure transducer to a volume measurement displayed in the operator's line of sight. Software within the instrument cluster unit for self-calibrating accounts for varying densities of different chemical solutions. The pressure transducer is used in conjunction with a transfer medium to prevent corrosive chemical solutions from contacting the pressure transducer.
    Type: Grant
    Filed: July 29, 2019
    Date of Patent: June 14, 2022
    Assignee: CNH Industrial America LLC
    Inventors: Aaron Tollefsrud, Bruce Bastin
  • Patent number: 11147259
    Abstract: An agricultural product application implement includes a system and method for indicating an amount of fluid stored. A pressure transducer installed at the sump of a fluid tank electronically measures and displays a fluid depth. Instrumentation, such as an instrument cluster unit for the implement, is programmed via software to convert the voltage output of the pressure transducer to a volume measurement displayed in the operator's line of sight. Software within the instrument cluster unit for self-calibrating accounts for varying densities of different chemical solutions. The pressure transducer is used in conjunction with a transfer medium to prevent corrosive chemical solutions from contacting the pressure transducer.
    Type: Grant
    Filed: July 29, 2019
    Date of Patent: October 19, 2021
    Assignee: CNH Industrial America LLC
    Inventors: Aaron Tollefsrud, Bruce Bastin
  • Patent number: 10801617
    Abstract: A propel system of an agricultural vehicle has an active pump displacement control system for equalizing or balancing pressure output of hydrostatic pumps of a tandem pump propel arrangement. The active pump displacement control system may include a pressure sensor(s) for determining output pressure of hydrostatic pumps and use the output pressure values within a feedback loop to provide coil input values of coils that control displacement of the hydrostatic pumps so that the pressure outputted by the hydrostatic pumps can be equalized in real-time while on the go during use of the agricultural vehicle.
    Type: Grant
    Filed: January 5, 2018
    Date of Patent: October 13, 2020
    Assignee: CNH Industrial America LLC
    Inventors: Aaron Tollefsrud, Daniel Connolly, James Keppers, Peter Meyer
  • Patent number: 10570797
    Abstract: An exhaust after-treatment system has a DEF system with improved DEF purge cycling during which time DEF is returned to a DEF storage tank. The DEF system adapts its methodology based on a condition within the DEF system. A purge valve may be arranged in a doser feed line between a DEF supply module and a DEF doser module. A purging control system may be configured to control the purge valve based on detected states within the DEF system, such as a detected state that corresponds to a plugged DEF doser module. If a plugged doser module is detected, the purge valve may be opened to vent the doser module feed line to atmosphere which allows the DEF to be returned to the DEF storage tank without creating a siphon effect that could draw additional DEF from the DEF storage tank into the supply module.
    Type: Grant
    Filed: January 5, 2018
    Date of Patent: February 25, 2020
    Assignee: CNH Industrial America LLC
    Inventors: Aaron Tollefsrud, Richard Kerner
  • Publication number: 20190350188
    Abstract: An agricultural product application implement includes a system and method for indicating an amount of fluid stored. A pressure transducer installed at the sump of a fluid tank electronically measures and displays a fluid depth. Instrumentation, such as an instrument cluster unit for the implement, is programmed via software to convert the voltage output of the pressure transducer to a volume measurement displayed in the operator's line of sight. Software within the instrument cluster unit for self-calibrating accounts for varying densities of different chemical solutions. The pressure transducer is used in conjunction with a transfer medium to prevent corrosive chemical solutions from contacting the pressure transducer.
    Type: Application
    Filed: July 29, 2019
    Publication date: November 21, 2019
    Applicant: CNH Industrial America LLC
    Inventors: Aaron Tollefsrud, Bruce Bastin
  • Publication number: 20190343107
    Abstract: An agricultural product application implement includes a system and method for indicating an amount of fluid stored. A pressure transducer installed at the sump of a fluid tank electronically measures and displays a fluid depth. Instrumentation, such as an instrument cluster unit for the implement, is programmed via software to convert the voltage output of the pressure transducer to a volume measurement displayed in the operator's line of sight. Software within the instrument cluster unit for self-calibrating accounts for varying densities of different chemical solutions. The pressure transducer is used in conjunction with a transfer medium to prevent corrosive chemical solutions from contacting the pressure transducer.
    Type: Application
    Filed: July 29, 2019
    Publication date: November 14, 2019
    Applicant: CNH Industrial America LLC
    Inventors: Aaron Tollefsrud, Bruce Bastin
  • Patent number: 10405534
    Abstract: An agricultural product application implement includes a system and method for indicating an amount of fluid stored. A pressure transducer installed at the sump of a fluid tank may electronically measure and display a fluid depth. Instrumentation, such as the instrument cluster unit for the implement, can be programmed via software to convert the voltage output of the pressure transducer to a volume measurement to be displayed in the operator's line of sight. Software may be provided within an instrument cluster unit for self-calibrating to account for varying densities of different chemical solutions. The pressure transducer may be used in conjunction with a transfer medium to prevent corrosive chemical solutions from contacting the pressure transducer.
    Type: Grant
    Filed: December 2, 2014
    Date of Patent: September 10, 2019
    Assignee: CNH Industrial America LLC
    Inventors: Aaron Tollefsrud, Bruce Bastin
  • Publication number: 20190211726
    Abstract: An exhaust after-treatment system has a DEF system with improved DEF purge cycling during which time DEF is returned to a DEF storage tank. The DEF system adapts its methodology based on a condition within the DEF system. A purge valve may be arranged in a doser feed line between a DEF supply module and a DEF doser module. A purging control system may be configured to control the purge valve based on detected states within the DEF system, such as a detected state that corresponds to a plugged DEF doser module. If a plugged doser module is detected, the purge valve may be opened to vent the doser module feed line to atmosphere which allows the DEF to be returned to the DEF storage tank without creating a siphon effect that could draw additional DEF from the DEF storage tank into the supply module.
    Type: Application
    Filed: January 5, 2018
    Publication date: July 11, 2019
    Inventors: Aaron Tollefsrud, Richard Kerner
  • Publication number: 20190211924
    Abstract: A propel system of an agricultural vehicle has an active pump displacement control system for equalizing or balancing pressure output of hydrostatic pumps of a tandem pump propel arrangement. The active pump displacement control system may include a pressure sensor(s) for determining output pressure of hydrostatic pumps and use the output pressure values within a feedback loop to provide coil input values of coils that control displacement of the hydrostatic pumps so that the pressure outputted by the hydrostatic pumps can be equalized in real-time while on the go during use of the agricultural vehicle.
    Type: Application
    Filed: January 5, 2018
    Publication date: July 11, 2019
    Inventors: Aaron Tollefsrud, Daniel Connolly, James Keppers, Peter Meyer
  • Publication number: 20160150771
    Abstract: An agricultural product application implement includes a system and method for indicating an amount of fluid stored. A pressure transducer installed at the sump of a fluid tank may electronically measure and display a fluid depth. Instrumentation, such as the instrument cluster unit for the implement, can be programmed via software to convert the voltage output of the pressure transducer to a volume measurement to be displayed in the operator's line of sight. Software may be provided within an instrument cluster unit for self-calibrating to account for varying densities of different chemical solutions. The pressure transducer may be used in conjunction with a transfer medium to prevent corrosive chemical solutions from contacting the pressure transducer.
    Type: Application
    Filed: December 2, 2014
    Publication date: June 2, 2016
    Inventors: Aaron Tollefsrud, Bruce Bastin
  • Patent number: 8833680
    Abstract: A plugged nozzle monitoring system uses a thermal flow sensor located within a spray nozzle of an agricultural sprayer. The thermal flow sensor is free of moving parts and is made of corrosion-resistant materials. The thermal flow sensor is placed within the fluid flow path through the nozzle and activates an alarm if flow through the nozzle falls below the baseline value.
    Type: Grant
    Filed: January 5, 2011
    Date of Patent: September 16, 2014
    Assignee: CNH Industrial America LLC
    Inventors: Jon Ellingson, Aaron Tollefsrud, Bruce Bastin
  • Publication number: 20120168530
    Abstract: A plugged nozzle monitoring system uses a thermal flow sensor located within a spray nozzle of an agricultural sprayer. The thermal flow sensor is free of moving parts and is made of corrosion-resistant materials. The thermal flow sensor is placed within the fluid flow path through the nozzle and activates an alarm if flow through the nozzle falls below the baseline value.
    Type: Application
    Filed: January 5, 2011
    Publication date: July 5, 2012
    Inventors: Jon Ellingson, Aaron Tollefsrud, Bruce Bastin
  • Publication number: 20060175440
    Abstract: A boom assembly includes a frame, a boom, a boom stabilization cylinder, and a feedback cylinder. The boom is rotatably mounted to the frame to rotate about a first axis. The boom stabilization cylinder is coupled to the boom to resist rotational deflection of the boom about the first axis. The feedback cylinder is coupled to a counterbalancing weight. The feedback cylinder is hydraulically coupled to the boom stabilization cylinder. Movement of the boom stabilization cylinder to resist deflection of the boom causes corresponding movement of the feedback cylinder to lift the counterbalancing weight.
    Type: Application
    Filed: December 22, 2004
    Publication date: August 10, 2006
    Inventors: Matthew Gunlogson, Aaron Tollefsrud