Patents by Inventor Robert G. Heulitt

Robert G. Heulitt 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).

  • Adjustable pressure actuated diaphragm valve assembly
    Patent number: 10323758
    Abstract: The diaphragm valve shown in my U.S. Pat. No. 6,615,774 is modified to improve performance by providing multiple overlapping springs to provide increased spring life and different stages of resistance on the diaphragm, a multi-arm housing having holes and tapered edges in each arm to increase air flow, a self seating seal in the housing which contacts the diaphragm, and a diaphragm guide surrounding the guide shaft having lands and spaces about the shaft in capture lubrication and vibration dampening holes surrounding the lands and spaces.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: June 18, 2019
    Inventor: Robert G. Heulitt
  • Adjustable pressure actuated diaphragm valve assembly
    Publication number: 20180128386
    Abstract: The diaphragm valve shown in my U.S. Pat. No. 6,615,774 is modified to improve performance by providing multiple overlapping springs to provide increased spring life and different stages of resistance on the diaphragm, a multi-arm housing having holes and tapered edges in each arm to increase air flow, a self seating seal in the housing which contacts the diaphragm, and a diaphragm guide surrounding the guide shaft having lands and spaces about the shaft in capture lubrication and vibration dampening holes surrounding the lands and spaces.
    Type: Application
    Filed: November 10, 2016
    Publication date: May 10, 2018
    Inventor: Robert G. Heulitt
  • Adjustable pressure actuated fuel/air diaphragm valve assembly
    Patent number: 6615774
    Abstract: A diaphragm valve assembly includes a diffusing screen, and a generally spherical lightweight membrane that provides a 360° circular seal. Spring loading enables variable resistance to be placed on the seal to allow the operator to adjust the internal pressures in an engine by metering the intake and exhaust cycles to obtain maximum performance characteristics from the subject engine.
    Type: Grant
    Filed: October 3, 2001
    Date of Patent: September 9, 2003
    Inventor: Robert G. Heulitt
  • Adjustable pressure actuated fuel/air diaphragm valve assembly
    Publication number: 20030066511
    Abstract: A diaphragm valve assembly includes a diffusing screen, and a generally spherical lightweight membrane that provides a 360° circular seal. Spring loading enables variable resistance to be placed on the seal to allow the operator to adjust the internal pressures in an engine by metering the intake and exhaust cycles to obtain maximum performance characteristics from the subject engine.
    Type: Application
    Filed: October 3, 2001
    Publication date: April 10, 2003
    Inventor: Robert G. Heulitt