Patents by Inventor Mathew E. Haigh

Mathew E. Haigh 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).

  • Rotary valve for single-point coolant diversion in engine cooling system
    Patent number: 6539899
    Abstract: A rotary valve provides single point flow control of coolant within the cooling system of an internal combustion engine. The valve distributes coolant flow from the engine in predetermined flow modes to either 1) the radiator and heater simultaneously, 2) a bypass circuit only, 3) the heater only, or 4) the radiator and bypass simultaneously. The single-point coolant control results in advantages of shorter warm-up times, a lower pressure drop (reducing power consumption by the pump), reduced engine emissions and fuel consumption, improved cabin heater performance, and improved engine durability due to reduced thermal shocks to the engine components by virtue of more precise control of engine operating temperature.
    Type: Grant
    Filed: February 11, 2002
    Date of Patent: April 1, 2003
    Assignee: Visteon Global Technologies, Inc.
    Inventors: Davide F. Piccirilli, Leonhard Bartsch, Keith E. Liederman, Matti K. Vint, Joseph V. Bejster, Nicholas P. Harmer, Martin Green, Mathew E. Haigh, Ali Jalilevand