Patents by Inventor Alex David Cohen

Alex David Cohen 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).

  • Soft start compressor clutch
    Patent number: 6290043
    Abstract: An electromagnetic clutch (10) for an air conditioning compressor includes a generally cylindrical pulley (11) rotatably mounted on a compressor housing (16) and having an annular friction surface (21b), a driven member (12) mounted on a compressor shaft (13) and having an annular friction surface (21a) positioned radially adjacent the first friction surface to form an annular space (21c) therebetween. A quantity of flowable magnetic material (27) is provided in the annular space (21c) and a magnetic coil (34) is fixed on the housing adjacent thereto. A control (40,46,46′) connected to the magnetic coil (34) supplies electrical power from a power supply (47) to energize the magnetic coil and create magnetic flux in the annular space (21c) polarizing the magnetic material and frictionally coupling the first and second friction surfaces (21a,21b) to cause the pulley (11) to rotate the driven member (12).
    Type: Grant
    Filed: December 29, 1999
    Date of Patent: September 18, 2001
    Assignee: Visteon Global Technologies, Inc.
    Inventors: John M. Ginder, Larry D. Elie, Shane A. Harte, Vipen Khetarpal, Alex David Cohen