Patents by Inventor Shane H. Rachedi

Shane H. Rachedi 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).

  • Exhaust gas recirculation system
    Patent number: 4409945
    Abstract: An EGR assembly of a sonic flow EGR valve and a fluid pressure actuated servo operated by air pressure modified by an air bleed device controlled in response to changes in carburetor venturi vacuum levels to provide EGR valve openings in proportion to engine air flow increases.
    Type: Grant
    Filed: May 9, 1983
    Date of Patent: October 18, 1983
    Assignee: Ford Motor Company
    Inventor: Shane H. Rachedi
  • Exhaust gas recirculation system
    Patent number: 4401092
    Abstract: An engine exhaust gas recirculation (EGR) system is provided in which a sonic flow EGR valve is moved to open positions to establish a different constant rate of flow at each open position of the EGR valve in response to air pressure acting on a servo means secured to the valve, the air pressure force being controlled by changes in a control vacuum opposing the air pressure force and modified by an air bleed device as a function of changes in engine exhaust gas backpressure levels, to provide an EGR valve movement that varies essentially in proportion to changes in engine air flow.
    Type: Grant
    Filed: July 29, 1981
    Date of Patent: August 30, 1983
    Assignee: Ford Motor Company
    Inventor: Shane H. Rachedi
  • Exhaust gas recirculation system
    Patent number: 4398524
    Abstract: An EGR assembly of a sonic flow EGR valve and a fluid pressure actuated servo operated by air pressure modified by an air bleed device controlled in response to changes in carburetor venturi vacuum levels to provide EGR valve openings in proportion to engine air flow increases.
    Type: Grant
    Filed: July 24, 1981
    Date of Patent: August 16, 1983
    Assignee: Ford Motor Company
    Inventor: Shane H. Rachedi
  • Multi-stage exhaust gas recirculation system
    Patent number: 4398525
    Abstract: An automotive type exhaust gas recirculation (EGR) system has two modes of operation, a first one that regulates EGR flow at a constant percentage rate as a function of throttle valve position independently of exhaust gas backpressure changes, and a second one that provides a variable percentage rate of flow of EGR gases in response to changes in exhaust gas backpressures, both modes utilizing carburetor ported vacuum modified by an air bleed device as the EGR valve opening force.
    Type: Grant
    Filed: November 12, 1981
    Date of Patent: August 16, 1983
    Assignee: Ford Motor Company
    Inventors: Daniel C. Ahrns, Shane H. Rachedi