Patents by Inventor Troy Robl

Troy Robl 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).

  • Quick coupler hydraulic control system
    Patent number: 9228314
    Abstract: A hydraulic system for an implement coupler assembly of a machine includes a coupler cylinder, a control valve connecting the coupler cylinder to a pressurized fluid source and a low pressure reservoir, and a sequence valve and a check valve connected in parallel between the coupler cylinder and the control valve. An implement cylinder provides a pilot pressure for the sequence valve. The coupler cylinder extends to a locked position when the control valve provides pressurized fluid through the check valve to a head end of the coupler cylinder. The coupler cylinder retracts to an unlocked position when the control valve provides pressurized fluid to a rod end of the coupler cylinder if the implement cylinder provides pilot pressure sufficient to open the sequence valve and connect the head end of the coupler cylinder to the low pressure reservoir.
    Type: Grant
    Filed: May 8, 2013
    Date of Patent: January 5, 2016
    Assignee: Caterpillar Inc.
    Inventors: Troy Robl, Trent Randall Stefek, Rudy Van Mills
  • Quick Coupler Hydraulic Control System
    Publication number: 20140331663
    Abstract: A hydraulic system for an implement coupler assembly of a machine includes a coupler cylinder, a control valve connecting the coupler cylinder to a pressurized fluid source and a low pressure reservoir, and a sequence valve and a check valve connected in parallel between the coupler cylinder and the control valve. An implement cylinder provides a pilot pressure for the sequence valve. The coupler cylinder extends to a locked position when the control valve provides pressurized fluid through the check valve to a head end of the coupler cylinder. The coupler cylinder retracts to an unlocked position when the control valve provides pressurized fluid to a rod end of the coupler cylinder if the implement cylinder provides pilot pressure sufficient to open the sequence valve and connect the head end of the coupler cylinder to the low pressure reservoir.
    Type: Application
    Filed: May 8, 2013
    Publication date: November 13, 2014
    Applicant: Caterpillar Inc.
    Inventors: Troy Robl, Trent Randall Stefek, Rudy Van Mills