Patents by Inventor Kevin R. Lingenfelter

Kevin R. Lingenfelter 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).

  • ELECTRONIC TORQUE AND PRESSURE CONTROL FOR LOAD SENSING PUMPS
    Publication number: 20200191137
    Abstract: An electric torque and pressure control for load sensing pumps includes a variable open circuit pump with a swash plate angle sensor. The pump is connected in line with a pressure compensated load sensing control having an electrically variable pressure relief valve and orifice. Connected to the circuit is an engine speed sensor, a user input device, and a micro-controller. The micro-controller has software that controls a pressure relief setting of the electrically variable pressure relief valve in the pressure sensing control based upon signals from the swash plate sensor and the engine speed sensor and inputs from the user input device.
    Type: Application
    Filed: February 24, 2020
    Publication date: June 18, 2020
    Inventors: Kevin R. Lingenfelter, Gary R. LaFayette
  • Electronic load sense control with electronic variable load sense relief, variable working margin, and electronic torque limiting
    Patent number: 9759212
    Abstract: An electrical pressure control load sense system having a pump connected inline to an operator control spool valve and a compensation circuit. The system also has a plurality of sensors, at least one pressure transducer, a micro-processor, a fixed orifice, a proportional pressure relief valve, and a swashplate angle sensor.
    Type: Grant
    Filed: November 18, 2015
    Date of Patent: September 12, 2017
    Assignee: Danfoss Power Solutions Inc.
    Inventors: Kevin R. Lingenfelter, Alex Bruns, Christian Daley, Vince Ewald, Danny Wakefield
  • ELECTRONIC LOAD SENSE CONTROL WITH ELECTRONIC VARIABLE LOAD SENSE RELIEF, VARIABLE WORKING MARGIN, AND ELECTRONIC TORQUE LIMITING
    Publication number: 20160195083
    Abstract: An electrical pressure control load sense system having a pump connected inline to an operator control spool valve and a compensation circuit. The system also has a plurality of sensors, at least one pressure transducer, a micro-processor, a fixed orifice, a proportional pressure relief valve, and a swashplate angle sensor.
    Type: Application
    Filed: November 18, 2015
    Publication date: July 7, 2016
    Inventors: Kevin R. Lingenfelter, Alex Bruns, Christian Daley, Vince Ewald, Danny Wakefield