Patents by Inventor Kent Stephen Hahn

Kent Stephen Hahn 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).

  • Fluid sprayer system using modulated control valve and a positive displacement pump
    Patent number: 6883726
    Abstract: A fluid sprayer system using a modulated hydraulic control valve and a positive displacement pump to control the amount of fluid sprayed by the system. The modulated hydraulic control valve may be controlled using pulse width modulation and may be provided with a substantially constant source of hydraulic fluid. The pulse width modulated hydraulic control valve provides the hydraulic fluid to a hydraulic motor as a controlled flow. The controlled flow serves to control the hydraulic motor that controls a positive displacement pump. The position displacement pump is used to control the amount of fluid sprayed by the system. The control system changes the signal to the control valve so as to mitigate pressure changes otherwise caused by said positive displacement pump.
    Type: Grant
    Filed: October 4, 2002
    Date of Patent: April 26, 2005
    Assignee: The Toro Company
    Inventors: Brannon Polk, John Story, Kent Stephen Hahn
  • Fluid sprayer system using modulated control valve and a positive displacement pump
    Publication number: 20030132310
    Abstract: A fluid sprayer system using a modulated hydraulic control valve and a positive displacement pump to control the amount of fluid sprayed by the system. The modulated hydraulic control valve may be controlled using pulse width modulation and may be provided with a substantially constant source of hydraulic fluid. The pulse width modulated hydraulic control valve provides the hydraulic fluid to a hydraulic motor as a controlled flow. The controlled flow serves to control the hydraulic motor that controls a positive displacement pump. The position displacement pump is used to control the amount of fluid sprayed by the system. The control system changes the signal to the control valve so as to mitigate pressure changes otherwise caused by said positive displacement pump.
    Type: Application
    Filed: October 4, 2002
    Publication date: July 17, 2003
    Applicant: The Toro Company
    Inventors: Brannon Polk, John Story, Kent Stephen Hahn