Patents by Inventor David W. Hines

David W. Hines 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).

  • Electrically operated displacement pump control system and method
    Patent number: 12092090
    Abstract: An electrically operated displacement pump includes an electric motor having a stator and a rotor. The rotor is connected to the fluid displacement member to drive axial reciprocation of the fluid displacement member. A drive mechanism is disposed between and connected to each of the rotor and the fluid displacement member. The drive mechanism receives a rotational output from the rotor and provides a linear input to the fluid displacement member. A controller controls operation of the motor based on an operating state of the motor to control pumping by the displacement pump.
    Type: Grant
    Filed: April 12, 2023
    Date of Patent: September 17, 2024
    Assignee: Graco Minnesota Inc.
    Inventors: Bradley H. Hines, Paul W. Scheierl, Brian W. Koehn, Jacob D. Higgins, Benjamin J. Paar, David L. Fehr
  • ELECTRICALLY OPERATED DISPLACEMENT PUMP CONTROL SYSTEM AND METHOD
    Publication number: 20240254978
    Abstract: An electrically operated displacement pump includes an electric motor having a stator and a rotor. The rotor is connected to the fluid displacement member to drive axial reciprocation of the fluid displacement member. A drive mechanism is disposed between and connected to each of the rotor and the fluid displacement member. The drive mechanism receives a rotational output from the rotor and provides a linear input to the fluid displacement member. A controller controls operation of the motor based on an operating state of the motor to control pumping by the displacement pump.
    Type: Application
    Filed: March 29, 2024
    Publication date: August 1, 2024
    Inventors: Bradley H. Hines, Paul W. Scheierl, Brian W. Koehn, Jacob D. Higgins, Benjamin J. Paar, David L. Fehr
  • Skimmer
    Patent number: 6328888
    Abstract: A skimmer for operating in a water environment provides a conveyor with transverse apertures and a sloping upwardly travelling lower flight in a trough shaped guide, for a lower extent and, over an upper extent beyond said guide and designed to move material in said upper extent and there to detach material in said apertures.
    Type: Grant
    Filed: July 13, 2000
    Date of Patent: December 11, 2001
    Assignee: Environment Recovery Equipment Inc.
    Inventor: David W. Hines
  • Oil recovery apparatus
    Patent number: 5743694
    Abstract: Oil recovery apparatus uses an open mesh conveyor designed to slope from a vessel into the water and to run with its lower flight travelling inboard while sliding on a flat bottomed trough. A container receives the liquid from the upper end of the trough.
    Type: Grant
    Filed: January 14, 1997
    Date of Patent: April 28, 1998
    Assignee: Environment Recovery Equipment Inc.
    Inventor: David W. Hines
  • Oil recovery apparatus
    Patent number: 5399054
    Abstract: Oil recovery apparatus uses an open mesh conveyor designed to slope from a vessel into the water and to run with its lower flight travelling inboard while sliding on a flat bottomed trough. A container receives the liquid from the upper end of the trough.
    Type: Grant
    Filed: May 6, 1993
    Date of Patent: March 21, 1995
    Assignee: Environmental Recovery Equipment Inc.
    Inventor: David W. Hines