Patents by Inventor James F. Crofoot

James F. Crofoot 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).

  • Rolling rotor motor driven scroll compressor
    Patent number: 5123818
    Abstract: The orbiting scroll element of a scroll compressor is integral with the rotor of an internal stator rolling rotor motor. Anti-rotation means are provided to limit the rotor and orbiting scroll to orbiting motion.
    Type: Grant
    Filed: May 3, 1991
    Date of Patent: June 23, 1992
    Assignee: Carrier Corporation
    Inventors: Thomas P. Gormley, James F. Crofoot
  • Internal stator rolling rotor motor driven scroll compressor
    Patent number: 5002470
    Abstract: The center of gravity of the rotor of a rolling rotor motor and the center of gravity of the orbiting scroll(s) of a scroll compressor are located on diametrically opposite sides of the centerline of the stator. The rotor and orbiting scroll(s) are connected through a plurality of circumferentially spaced links which are pivotable about fixed axes whereby movement of the rotor produces movement of the orbiting scroll(s) while the orbiting scroll(s) serves as a counterweight with respect to the rotor.
    Type: Grant
    Filed: December 14, 1989
    Date of Patent: March 26, 1991
    Assignee: Carrier Corporation
    Inventors: Thomas P. Gormley, James F. Crofoot
  • Rolling rotor motor balancing means
    Patent number: 4984480
    Abstract: The center of gravity of the rotor of a rolling rotor motor and the center of gravity of the counterweights are located on diametrically opposite sides of the centerline of the stator. The rotor and counterweights are connected through a plurality of circumferentially spaced links which are pivotable about fixed axes. The rotor and counterweights are able to move radially to change their rotation arm but such movement is transmitted to the other member through the links resulting in a corresponding movement.
    Type: Grant
    Filed: December 14, 1989
    Date of Patent: January 15, 1991
    Assignee: Carrier Corporation
    Inventors: Thomas P. Gormley, James F. Crofoot
  • External stator rolling rotor scroll compressor
    Patent number: 4946353
    Abstract: A hermetic scroll compressor is driven by a rolling rotor motor. The orbiting scroll and drive shaft are integral and orbit with respect to the rotor which carries the drive shaft as it moves about the stator bore.
    Type: Grant
    Filed: July 3, 1989
    Date of Patent: August 7, 1990
    Assignee: Carrier Corporation
    Inventor: James F. Crofoot
  • Balanced rolling rotor motor compressor
    Patent number: 4892467
    Abstract: A rolling rotor motor/compressor is provided with counterweights for mechanical balancing while permitting radial movement of the rotor/piston. This permits unloading of the compressor such as when there is a liquid slug. The rotor/piston and the counterweights are driven by diametrically opposed windings so that the rotor/piston does not drive the counterweights with attendant power/capacity reductions.
    Type: Grant
    Filed: December 12, 1988
    Date of Patent: January 9, 1990
    Assignee: Carrier Corporation
    Inventor: James F. Crofoot