Patents by Inventor Douglas A. Roe

Douglas A. Roe 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).

  • Patent number: 4702220
    Abstract: A tubular body projects through the normal inlet opening in the inlet manifold of a conventional internal combustion engine. The quantity of fuel mixture flowing through the bore in the body is controlled by a throttle valve which is reciprocally movable relative the discharge end of the body which resides within the manifold. Biasing means normally retracts the valve to an engine idle position. The valve is extended in response to engine demand. Droplets of liquid within the fuel mixture are atomized in response to an annular deflector which directs the mixture from the sidewall of the bore to be impinged upon the planar surface of the valve. A stationary screen encompassing the valve further atomizes the mixture. Baffels are provided to direct the fuel charge toward the combustion chambers.
    Type: Grant
    Filed: February 11, 1987
    Date of Patent: October 27, 1987
    Inventor: Douglas A. Roe
  • Patent number: 4648476
    Abstract: A drive unit including an engine and steerable wheels, is pivotally connected to the forward end of a chassis, including a body and ground support wheels. A pair of struts movably mounted to the chassis, equilaterally outboard and above the pivotal connection, extend downwardly inward to the drive unit and are movably affixed. In response to the natural tilt of the chassis while transversing a corner, weight is transferred through the struts to equalize traction upon the steerable wheels.
    Type: Grant
    Filed: January 23, 1985
    Date of Patent: March 10, 1987
    Assignee: Douglas Roe
    Inventors: Douglas A. Roe, Terance D. Harp
  • Patent number: 3965221
    Abstract: A combustible air-liquid fuel mixture having a substantially constant air-to-fuel ratio is produced for delivery to the intake manifold of an engine. Air is passed through a fluid flow device having a variable area throat zone to increase the velocity of the air to sonic, and the area of the throat zone is varied in correlation with operating demands imposed upon the engine for which the mixture is produced. Liquid fuel is metered from a supply into the air stream at or before the throat zone in direct proportion to the cross-sectional area of the throat zone. The pressure of the high velocity air stream is sensed at a point where it bears a predictable relationship to atmospheric pressure, and the rate of fuel delivered into the air stream is adjusted in response to changes in the air pressure sensed so that the air-to-fuel ratio of the mixture is maintained substantially constant.
    Type: Grant
    Filed: July 3, 1974
    Date of Patent: June 22, 1976
    Assignee: Dresser Industries, Inc.
    Inventors: Robert D. Englert, Lester Porter Berriman, Kenneth P. Armstrong, Douglas A. Roe