Patents by Inventor Darrell Duffek

Darrell Duffek 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).

  • FLOODED VARIABLE SPEED ELECTRIC MACHINE WITH VARIABLE FLOW
    Publication number: 20120205994
    Abstract: An electric machine includes a rotor, a stator, and an air gap defined by a space between the rotor and a stator. A volume of cooling fluid is located in the air gap and in contact with both the rotor and the stator. A method for cooling the electric machine includes sensing speed of the electric machine and varying the volume of coolant located in the air gap in response to the sensed speed of the electric machine.
    Type: Application
    Filed: February 11, 2011
    Publication date: August 16, 2012
    Applicant: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Mahesh J. Shah, Darrell Duffek