Patents by Inventor Eric Thomas Nelson

Eric Thomas Nelson 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).

  • System for adjusting rate of spool centering in a pilot-controlled hydraulic spool valve
    Patent number: 12644535
    Abstract: The disclosure is directed to an apparatus and system for adjusting rate of spool centering in a pilot-controlled hydraulic spool valve. The apparatus includes a first pilot port and a second pilot port. The apparatus includes a first valve port and a second valve port. The apparatus also includes a first hydraulic circuit connecting the first pilot port and the first valve port, wherein the first hydraulic circuit, based on a hydraulic fluid pressure of the second pilot port, comprises one of a controlled-flow condition and an unrestricted-flow condition. The apparatus further includes a second hydraulic circuit connecting the second pilot port and the second valve port, wherein the second hydraulic circuit, based on a hydraulic fluid pressure of the first pilot port, comprises one of a controlled-flow condition and an unrestricted-flow condition.
    Type: Grant
    Filed: April 7, 2023
    Date of Patent: June 2, 2026
    Assignee: Barko Hydraulics, LLC
    Inventors: James Douglas Holmes, Eric Thomas Nelson, Nathan Bradley Wourms
  • SYSTEM FOR ADJUSTING RATE OF SPOOL CENTERING IN A PILOT-CONTROLLED HYDRAULIC SPOOL VALVE
    Publication number: 20230243439
    Abstract: The disclosure is directed to an apparatus and system for adjusting rate of spool centering in a pilot-controlled hydraulic spool valve. The apparatus includes a first pilot port and a second pilot port. The apparatus includes a first valve port and a second valve port. The apparatus also includes a first hydraulic circuit connecting the first pilot port and the first valve port, wherein the first hydraulic circuit, based on a hydraulic fluid pressure of the second pilot port, comprises one of a controlled-flow condition and an unrestricted-flow condition. The apparatus further includes a second hydraulic circuit connecting the second pilot port and the second valve port, wherein the second hydraulic circuit, based on a hydraulic fluid pressure of the first pilot port, comprises one of a controlled-flow condition and an unrestricted-flow condition.
    Type: Application
    Filed: April 7, 2023
    Publication date: August 3, 2023
    Inventors: James Douglas Holmes, Eric Thomas Nelson, Nathan Bradley Wourms
  • System for adjusting rate of spool centering in a pilot-controlled hydraulic spool valve
    Patent number: 11624452
    Abstract: The disclosure is directed to an apparatus and system for adjusting rate of spool centering in a pilot-controlled hydraulic spool valve. The apparatus includes a first pilot port and a second pilot port. The apparatus includes a first valve port and a second valve port. The apparatus also includes a first hydraulic circuit connecting the first pilot port and the first valve port, wherein the first hydraulic circuit, based on a hydraulic fluid pressure of the second pilot port, comprises one of a controlled-flow condition and an unrestricted-flow condition. The apparatus further includes a second hydraulic circuit connecting the second pilot port and the second valve port, wherein the second hydraulic circuit, based on a hydraulic fluid pressure of the first pilot port, comprises one of a controlled-flow condition and an unrestricted-flow condition.
    Type: Grant
    Filed: April 1, 2020
    Date of Patent: April 11, 2023
    Assignee: BARKO HYDRAULICS, LLC
    Inventors: James Douglas Holmes, Eric Thomas Nelson, Nathan Bradley Wourms
  • SYSTEM FOR ADJUSTING RATE OF SPOOL CENTERING IN A PILOT-CONTROLLED HYDRAULIC SPOOL VALVE
    Publication number: 20200326013
    Abstract: The disclosure is directed to an apparatus and system for adjusting rate of spool centering in a pilot-controlled hydraulic spool valve. The apparatus includes a first pilot port and a second pilot port. The apparatus includes a first valve port and a second valve port. The apparatus also includes a first hydraulic circuit connecting the first pilot port and the first valve port, wherein the first hydraulic circuit, based on a hydraulic fluid pressure of the second pilot port, comprises one of a controlled-flow condition and an unrestricted-flow condition. The apparatus further includes a second hydraulic circuit connecting the second pilot port and the second valve port, wherein the second hydraulic circuit, based on a hydraulic fluid pressure of the first pilot port, comprises one of a controlled-flow condition and an unrestricted-flow condition.
    Type: Application
    Filed: April 1, 2020
    Publication date: October 15, 2020
    Applicant: BARKO HYDRAULICS, LLC
    Inventors: James Douglas Holmes, Eric Thomas Nelson, Nathan Bradley Wourms