Patents Assigned to Northwest Investments
  • Fuel heater
    Patent number: 4722314
    Abstract: An apparatus for heating liquid fuel for an internal combustion engine has a heat exchanger equipped with a fileter for removing vapors generated during the heating of the fuel in the heat exchanger. The controller has a finger movable into a passage with a temperature responsive actuator. The hot fuel from the heat exchanger heats the temperature responsive actuator to control the flow of heating fluid to the heat exchanger.
    Type: Grant
    Filed: July 2, 1986
    Date of Patent: February 2, 1988
    Assignee: Northwest Investments
    Inventor: Daniel B. Martinson
  • Fuel treating apparatus for engines
    Patent number: 4367717
    Abstract: Gasoline treating apparatus for an automotive engine including a modulating heat exchanger heating the gasoline from the supply tank before directing the gasoline into the carburetor and utilizing heat from the engine coolant, the temperature of the heated gasoline being sensed for regulating the flow of the engine coolant; and an additional heater for the gasoline in the air-fuel mixture and obtaining heat for the additional heating from the engine coolant.
    Type: Grant
    Filed: April 7, 1980
    Date of Patent: January 11, 1983
    Assignee: Northwest Investments
    Inventor: Dennis A. Ray