Patents by Inventor Robert D. Cork

Robert D. Cork 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).

  • Hydraulic diverting system for utility vehicle
    Patent number: 6672399
    Abstract: A hydraulic fluid diverting arrangement for a utility vehicle provides additional pressurized hydraulic fluid supply to an installed backhoe attachment by diverting hydraulic fluid from the unused rockshaft or three-point hitch of the utility vehicle. A solenoid operated valve manifold is switch actuated by contact from the backhoe during installation of the backhoe to the utility vehicle and diverts hydraulic fluid flow from rockshaft hydraulic cylinders to backhoe hydraulic cylinders. The system increases the available horsepower to the backhoe by using hydraulic fluid otherwise dedicated to the idle rockshaft.
    Type: Grant
    Filed: October 19, 2001
    Date of Patent: January 6, 2004
    Assignee: Deere & Company
    Inventors: David Laverne Sprinkle, Robert D. Cork
  • Hydraulic diverting system for utility vehicle
    Publication number: 20030074811
    Abstract: A hydraulic fluid diverting arrangement for a utility vehicle provides additional pressurized hydraulic fluid supply to an installed backhoe attachment by diverting hydraulic fluid from the unused rockshaft or three-point hitch of the utility vehicle. A solenoid operated valve manifold is switch actuated by contact from the backhoe during installation of the backhoe to the utility vehicle and diverts hydraulic fluid flow from rockshaft hydraulic cylinders to backhoe hydraulic cylinders. The system increases the available horsepower to the backhoe by using hydraulic fluid otherwise dedicated to the idle rockshaft.
    Type: Application
    Filed: October 19, 2001
    Publication date: April 24, 2003
    Inventors: David Laverne Sprinkle, Robert D. Cork