Patents by Inventor David J. Marriage

David J. Marriage 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).

  • Air/fuel induction system for spark ignition internal combustion engines, and electromagnetic valves
    Patent number: 4587986
    Abstract: A motor vehicle fuel system operable selectively to supply metered quantities of petrol or LPG in its gaseous state to a carburetter induction passage. The LPG system includes a single stage pressure regulator and an injection valve which may be a digital or an analogue valve. The regulator operates to vary the pressure of gaseous LPG with variations in engine loading by referring that pressure across a single diaphragm to the pressure established in the induction passage downstream of the throttle valve by operation of the engine, while maintaining that regulated gas pressure above that subsisting in the induction passage upstream of the throttle valve.
    Type: Grant
    Filed: February 15, 1985
    Date of Patent: May 13, 1986
    Assignee: Solex (U.K.) Limited
    Inventors: Thomas J. Ullman, Colin F. Shadbolt, Brian C. Pagdin, David J. Marriage, Peter J. Clarke, Ian J. Sheppard
  • Air/fuel induction system for a multi-cylinder internal combustion engine
    Patent number: 4545345
    Abstract: An air/fuel induction system includes a pair of solenoid valves injecting fuel into an induction passage of a multi-cylinder engine. The valves supply fuel upstream of the inlet manifold to the engine and do not therefore direct fuel to specific cylinders. The solenoids (36, 36a) operate alternatively through pulses developed by drive units controlled by a microprocessor-based control unit (19). Each valve is independently timed by a respective timer-counter (44, 45) and valve operation overlaps in some circumstances. This allows smaller valves to be used and overcomes the problem of gusting at low speeds. The system may be applied to an LPG fuel system used as an additional fuel supply.
    Type: Grant
    Filed: November 28, 1983
    Date of Patent: October 8, 1985
    Assignee: Solex (U.K.) Limited
    Inventors: Brian C. Pagdin, David J. Marriage
  • Air/fuel induction system for spark ignition internal combustion engines, and electromagnetic valves
    Patent number: 4513728
    Abstract: A motor vehicle fuel system operable selectively to supply metered quantities of petrol or LPG in its gaseous state to a carburetter induction passage. The LPG system includes a single stage pressure regulator and an injection valve which may be a digital or an analogue valve. The regulator operates to vary the pressure of gaseous LPG with variations in engine loading by referring that pressure across a single diaphragm to the pressure established in the induction passage downstream of the throttle valve by operation of the engine, while maintaining that regulated gas pressure above that subsisting in the induction passage upstream of the throttle valve.
    Type: Grant
    Filed: December 14, 1982
    Date of Patent: April 30, 1985
    Assignee: Solex (U.K.) Limited
    Inventors: Thomas J. Ullman, Colin F. Shadbolt, Brian C. Pagdin, David J. Marriage, Peter J. Clarke, Ian J. Sheppard