Patents by Inventor Michael J. Dowhan

Michael J. Dowhan 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).

  • ASSEMBLY FOR TRANSMITTING N-PHASE CURRENT
    Publication number: 20080179969
    Abstract: An assembly and method for providing at multiphase current signals in which a plurality of conductors is arranged with conductors carrying dissimilar phases adjacent one another, and preferably in a balanced arrangement, such that the induced magnetic fields are subtractive from each other, and the assembly with reduced inductance results.
    Type: Application
    Filed: January 31, 2007
    Publication date: July 31, 2008
    Inventors: Kevin A. Dooley, Joshua David Bell, Gilles D. Gagnon, Michael J. Dowhan, Joseph Brand, Jerzy Wasiewicz
  • Fan blade axial retention device
    Patent number: 5112193
    Abstract: A fan blade retention device includes a collar (13) inserted into a circumferential groove (14) cut into the hub (6) of a turbofan engine. The outward facing groove (14) is positioned aft of the fan blade fixing channel (15). When the fan blade root (11) is completely received within the blade fixing channel (15), the blade root (11) contacts the collar (13) and is prevented from traveling further aft. If the collar 13 is segmented, an annular rear cover plate (19) holds the segmented collar (13) radially within the groove (14).
    Type: Grant
    Filed: September 11, 1990
    Date of Patent: May 12, 1992
    Assignee: Pratt & Whitney Canada
    Inventors: John Greer, Haruhisa Chijiiwa, Michael J. Dowhan