Patents by Inventor Tom Eldredge

Tom Eldredge 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: 7861520
    Abstract: A method of reducing emissions from a diesel engine including the steps of providing an injector to an exhaust outlet of the diesel engine, the injector having an orifice with a diameter of about 0.006 inch or less, providing a reagent to the injector at an inlet pressure between about 120 psi and about 60 psi, actuating the injector on and off at a frequency between about 10 Hz and about 1 Hz with an on-time of about 1% or more, injecting the reagent via the orifice into the exhaust outlet at an injection rate, and wherein varying of at least two of the inlet pressure, the frequency, and the on-time achieves a turn-down ratio of a maximum injection rate to a minimum injection rate of at least about 31:1.
    Type: Grant
    Filed: May 29, 2007
    Date of Patent: January 4, 2011
    Assignee: Tenneco Automotive Operating Company Inc.
    Inventors: R. Gifford Broderick, Tom Eldredge
  • Publication number: 20080022654
    Abstract: A method of reducing emissions from a diesel engine including the steps of providing an injector to an exhaust outlet of the diesel engine, the injector having an orifice with a diameter of about 0.006 inch or less, providing a reagent to the injector at an inlet pressure between about 120 psi and about 60 psi, actuating the injector on and off at a frequency between about 10 Hz and about 1 Hz with an on-time of about 1% or more, injecting the reagent via the orifice into the exhaust outlet at an injection rate, and wherein varying of at least two of the inlet pressure, the frequency, and the on-time achieves a turn-down ratio of a maximum injection rate to a minimum injection rate of at least about 31:1.
    Type: Application
    Filed: May 29, 2007
    Publication date: January 31, 2008
    Inventors: R. Broderick, Tom Eldredge