Patents by Inventor Eric Hamkins

Eric Hamkins 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).

  • Radial piston pump assemblies and use thereof in hydraulic circuits
    Patent number: 10125750
    Abstract: A system and method for machinery performing work with hydraulic actuators. Radial hydraulic pumps are aligned end-to-end along a common driveshaft axis to form a multi-pump assembly having a plurality of piston/cylinder units extending in a radial direction. Two or more piston/cylinder units are associated with one another to form multiple piston/cylinder groups. A plurality of control valves combines individual output flows from the two or more associated piston/cylinder units into respective common output flows for each respective piston/cylinder group. A plurality of flow control devices varies the common output flow from each respective piston/cylinder group by throttling inlet flow to the two or more associated piston/cylinder units in each respective piston/cylinder group. Each respective common output flow is directed from each respective piston/cylinder group to a hydraulic actuator on the heavy machinery to control its direction of movement.
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: November 13, 2018
    Assignee: HUSCO International, Inc.
    Inventors: Joe Pfaff, Bradley Kramer, Dwight Stephenson, Eric Hamkins
  • Radial Piston Pump Assemblies and Use Thereof in Hydraulic Circuits
    Publication number: 20170009753
    Abstract: A system and method for machinery performing work with hydraulic actuators. Radial hydraulic pumps are aligned end-to-end along a common driveshaft axis to form a multi-pump assembly having a plurality of piston/cylinder units extending in a radial direction. Two or more piston/cylinder units are associated with one another to form multiple piston/cylinder groups. A plurality of control valves combines individual output flows from the two or more associated piston/cylinder units into respective common output flows for each respective piston/cylinder group. A plurality of flow control devices varies the common output flow from each respective piston/cylinder group by throttling inlet flow to the two or more associated piston/cylinder units in each respective piston/cylinder group. Each respective common output flow is directed from each respective piston/cylinder group to a hydraulic actuator on the heavy machinery to control its direction of movement.
    Type: Application
    Filed: July 8, 2016
    Publication date: January 12, 2017
    Applicant: HUSCO International, Inc.
    Inventors: Joe Pfaff, Bradley Kramer, Dwight Stephenson, Eric Hamkins
  • Differential pressure control
    Patent number: 8453783
    Abstract: A vehicle with a load sensing hydraulic control system is disclosed.
    Type: Grant
    Filed: June 18, 2007
    Date of Patent: June 4, 2013
    Assignee: Deere & Company
    Inventors: Eric Hamkins, Steve Gary Fleischmann, Mark Schultz, Lynn Russell, Kristen D. Cadman
  • Differential Pressure Control
    Publication number: 20100252354
    Abstract: A vehicle with a load sensing hydraulic control system is disclosed.
    Type: Application
    Filed: June 18, 2007
    Publication date: October 7, 2010
    Applicant: DEERE & COMPANY
    Inventors: Eric Hamkins, Steve Gary Fleischmann, Mark Schultz, Lynn Russell, Kristen D. Cadman