Patents by Inventor Michael D. Ash

Michael D. Ash 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).

  • Turbocharged engine cooling system with two-pass radiator
    Patent number: 6314921
    Abstract: An engine cooling system includes a two-pass radiator, a jacket water pump pumping coolant from the radiator to the engine, and an aftercooler for cooling engine charge air from a turbocharger. An aftercooler pump pumps coolant from the radiator to the aftercooler. An orifice can be disposed in the aftercooler discharge line to limit flow therethrough, and an orifice bypass line with thermostatic control valve can be provided to selectively bypass the orifice. A shunt tank is connected to the suction of the jacket water pump to establish a static pressure head thereon, to ensure that the jacket water pump has sufficient suction pressure despite relatively high coolant head loss through the two-pass radiator.
    Type: Grant
    Filed: August 23, 2000
    Date of Patent: November 13, 2001
    Assignee: Caterpillar Inc.
    Inventors: Michael D. Ash, Michael D. Betz, Ronald L. Dupree
  • Turbocharged engine cooling system with two-pass radiator
    Patent number: 6158399
    Abstract: An engine cooling system includes a two-pass radiator, a jacket water pump pumping coolant from the radiator to the engine, and an aftercooler for cooling engine charge air from a turbocharger. An aftercooler pump pumps coolant from the radiator to the aftercooler. An orifice can be disposed in the aftercooler discharge line to limit flow therethrough, and an orifice bypass line with thermostatic control valve can be provided to selectively bypass the orifice. A shunt tank is connected to the suction of the jacket water pump to establish a static pressure head thereon, to ensure that the jacket water pump has sufficient suction pressure despite relatively high coolant head loss through the two-pass radiator.
    Type: Grant
    Filed: November 6, 1998
    Date of Patent: December 12, 2000
    Assignee: Caterpillar Inc.
    Inventors: Michael D. Ash, Michael D. Betz, Ronald L. Dupree