Patents Assigned to Copeland Corporation
  • Patent number: 5064356
    Abstract: A refrigeration motor compressor assembly has a housing including a lubricant sump in the bottom thereof into which the lower end of the drive shaft and associated rotor extend. A shield is provided which is supported on and positioned by the drive shaft in underlying spaced relationship to the lower end of the rotor and associated counterweight. As the rotor rotates, lubricant disposed between the shield and rotor therein is thrown outwardly across the end turns of the stator thus serving to cool same. The shield serves to restrict the return flow of oil to the area immediately below the rotor thus reducing the viscous drag on the motor yet still allowing sufficient circulation of oil to achieve the desired cooling of the stator.
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: November 12, 1991
    Assignee: Copeland Corporation
    Inventor: James F. Horn
  • Patent number: 5055010
    Abstract: A hermetic refrigeration compressor is disclosed which includes a baffle member secured to the inner surface of the outer shell in overlying relationship to a suction inlet port. The suction baffle includes a dome shaped portion centrally disposed with respect to the inlet port and provides axially upper and lower openings defined between the baffle member and the inner surface of the outer shell.
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: October 8, 1991
    Assignee: Copeland Corporation
    Inventor: Kent E. Logan
  • Patent number: 5049040
    Abstract: A variable capacity compressor in which each compression chamber has a reexpansion chamber the volume of which is selectively controlled by pressurized lubricant.
    Type: Grant
    Filed: October 12, 1989
    Date of Patent: September 17, 1991
    Assignee: Copeland Corporation
    Inventors: Tariq A. R. Diab, Jerry L. Miller, Earl B. Muir
  • Patent number: 5040953
    Abstract: A suspension system for a refrigeration condensing unit which utilizes a simple unique elastomeric spacer instead of conventional multiple-piece spring arrangements.
    Type: Grant
    Filed: August 3, 1990
    Date of Patent: August 20, 1991
    Assignee: Copeland Corporation
    Inventor: Theodore E. Tinsler
  • Patent number: 5038891
    Abstract: A refrigeration compressor is disclosed which incorporates an improved lubrication system to insure adequate lubrication to all bearings via a single elongated axial offset passage provided in the crankshaft. The lubrication system also incorporates a passage arrangement which serves to vent any refrigerant gases which may be encountered as well as to prevent priming of the vent passage which could result in transfer of lubricant into the motor compartment.
    Type: Grant
    Filed: April 12, 1990
    Date of Patent: August 13, 1991
    Assignee: Copeland Corporation
    Inventor: Frank S. Wallis
  • Patent number: 5015155
    Abstract: A refrigeration compressor incorporating an improved arrangement and method for securing the motor cover to the motor stator is disclosed which arrangement and method also greatly facilitate the setting of the air gap between the stator and rotor.
    Type: Grant
    Filed: March 26, 1990
    Date of Patent: May 14, 1991
    Assignee: Copeland Corporation
    Inventor: James M. Brown
  • Patent number: 4998864
    Abstract: An improved scroll compressor is disclosed which incorporates a one-way clutch operative to prevent reverse rotation of the orbiting scroll member. In one embodiment the one-way clutch also serves as a lower bearing for supporting the drive shaft whereas in another embodiment a separate bearing member is utilized in connection with the one-way clutch.
    Type: Grant
    Filed: October 10, 1989
    Date of Patent: March 12, 1991
    Assignee: Copeland Corporation
    Inventor: Earl B. Muir
  • Patent number: 4993929
    Abstract: A scroll-type machine which incorporates a self-pressurizing hydrodynamic thrust bearing to maintain a constant interface of oil between the axial thrust surfaces.
    Type: Grant
    Filed: October 4, 1989
    Date of Patent: February 19, 1991
    Assignee: Copeland Corporation
    Inventor: Roger C. Weatherston
  • Patent number: 4992033
    Abstract: There is disclosed a scroll-type machine particularly suited for use as a refrigerant compressor and incorporating Oldham coupling utilizing a novel ring element which is non-circular and provides for increased thrust-bearing size, or reduced machine size.
    Type: Grant
    Filed: July 31, 1989
    Date of Patent: February 12, 1991
    Assignee: Copeland Corporation
    Inventors: Jean-Luc M. Caillat, Roger C. Weatherston, James W. Bush
  • Patent number: 4988269
    Abstract: A hermetic motor-compresosr having separate discharge cavities in the compressor body for each pumping cylinder, a common discharge gas plenum for the entire compressor, and an impedance tube between each cavity and said plenum, thereby signficantly improving the sound attentuation of discharge gas pulses.
    Type: Grant
    Filed: February 8, 1990
    Date of Patent: January 29, 1991
    Assignee: Copeland Corporation
    Inventor: Jaroslav Blass
  • Patent number: 4974427
    Abstract: A refrigeration system is disclosed which incorporates apparatus for preventing overheating of the compressor by selectively feeding liquid refrigerant from the outlet of the condenser to the compressor. In one embodiment the refrigerant fluid from the compressor is injected into the suction manifold of the compressor. In another embodiment this fluid is injected directly into the compression chamber or chambers. Control means are provided which include a temperature sensor located within the compressor discharge chamber and valve means responsive thereto to control the flow of liquid refrigerant to the suction manifold or compression chamber.
    Type: Grant
    Filed: October 17, 1989
    Date of Patent: December 4, 1990
    Assignee: Copeland Corporation
    Inventor: Tariq A. R. Diab
  • Patent number: 4955795
    Abstract: A scroll-type machine having a control arrangement which acts to disable the machine when there is an abnormal pressure in one of the scroll fluid pockets, thereby preventing damage to the machine upon reverse rotation or low system charge.
    Type: Grant
    Filed: December 21, 1988
    Date of Patent: September 11, 1990
    Assignee: Copeland Corporation
    Inventor: Russell W. Griffith
  • Patent number: 4954057
    Abstract: A scroll machine having an eccentric crank pin on a crankshaft disposed nonrotatably in the bore of a drive bushing for driving the orbiting scroll of the compressor. A flat surface on the crank pin drivingly engages a flat surface in the bore, and a unique lubrication arrangement incorporating a hydrostatic bearing is provided to lubricate the flat surfaces. Several alternative embodiments are also disclosed.
    Type: Grant
    Filed: October 18, 1988
    Date of Patent: September 4, 1990
    Assignee: Copeland Corporation
    Inventors: Jean-Luc Caillat, Stephen M. Seibel
  • Patent number: 4949982
    Abstract: A valve plate for a motor compressor has a continuously smooth figure-eight shaped port for reducing stresses along the primary longitudinal axis of a reed valve associated with the port, and an arrangement for providing a mechanical interlock for a head gasket to inhibit pressure loss between adjacent compressor cylinders.
    Type: Grant
    Filed: May 25, 1989
    Date of Patent: August 21, 1990
    Assignee: Copeland Corporation
    Inventor: Michael A. DiFlora
  • Patent number: 4947655
    Abstract: There is disclosed a refrigeration system employing multi-stage compressors, several unique modes of operation thereof, a sub-cooler/economizer for sub-cooling the condensed refrigerant prior to vaporization in the evaporator, as well as an improved expansion valve arrangement for controlling second stage discharge temperature, another valve arrangement for controlling economizer liquid discharge temperature, an interstage intercooler for use in a hot water system, a satellite compressor arrangement for ultra-low temperature applications, and an improved liquid-suction heat exchange arrangement.
    Type: Grant
    Filed: October 31, 1988
    Date of Patent: August 14, 1990
    Assignee: Copeland Corporation
    Inventor: David N. Shaw
  • Patent number: 4927341
    Abstract: A scroll compressor is disclosed in which either or both of the spiral wraps of the scroll members are reduced in thickness (i.e., cut away) adjacent to the inlet port defining the starting point the vanes would theoretically sealingly engage one another to initiate compression. Additionally, either or both of the spiral wraps of the scroll members may be reduced in thickness (i.e. cut away) adjacent to the discharge port where the vanes separate and the compression chambers defined thereby communicate with the discharge port. Provision of a smooth transition at the points of engagement cooperates to reduce noise and wear during operation of the compressor.
    Type: Grant
    Filed: April 12, 1989
    Date of Patent: May 22, 1990
    Assignee: Copeland Corporation
    Inventor: James W. Bush
  • Patent number: 4926081
    Abstract: A retention arrangement for retaining a motor cover and a thermal protection device over one end of a dynamoelectric motor uses connection bolts already available on the motor for mounting the stator and positions the protector in an annulus between the cover side wall and stator end turns and below the upward extension of the stator end turns. The retention arrangement includes a pair of plates being bolted to the motor and encircling the end turns of the stator with first interengageable portions securing the cover to the plates and second interengageable portions securing at least one plate to a holder to which the protector is mounted, such retention assuring that after the air space between the stator and rotor is set a suction duct will be positioned to cool the protection device and the end turns.
    Type: Grant
    Filed: February 11, 1988
    Date of Patent: May 15, 1990
    Assignee: Copeland Corporation
    Inventors: Michael A. DiFlora, James M. Brown, Steven L. Rice, Jeffery D. Ramsey
  • Patent number: 4895496
    Abstract: A refrigeration motor compressor assembly has a housing including a lubricant sump in the bottom thereof into which the lower end of the drive shaft and associated rotor extend. A shield is provided which is positioned by the drive shaft and extends above the oil level in the sump in surrounding spaced relationship to the lower end of the rotor. As the rotor rotates within the shield, lubricant contained therein is thrown out of the surrounding shield and a close fit between the shield and the shaft restricts return flow of lubricant into the area occupied by the rotating rotor.
    Type: Grant
    Filed: June 8, 1988
    Date of Patent: January 23, 1990
    Assignee: Copeland Corporation
    Inventor: John P. Elson
  • Patent number: 4893044
    Abstract: An improved arrangement for securing a counterweight to a rotor of an electric motor is disclosed wherein the counterweight includes a body portion disposed entirely on one side of a diametrical plane extending along the axis of rotation of the rotor and flange portions for securing said counterweight to the rotor are disposed on the other side of this plane.
    Type: Grant
    Filed: November 20, 1987
    Date of Patent: January 9, 1990
    Assignee: Copeland Corporation
    Inventors: James W. Bush, Gary J. Anderson
  • Patent number: 4877382
    Abstract: There is disclosed a scroll-type machine particularly suited for use as a refrigerant compressor and incorporating an improved suspension system for the non-orbiting scroll whereby the latter may be pressure biased for the purpose of augmenting tip sealing. The machine also has a modified wrap tip and end plate profile in order to enhance performance, as well as an improved lubrication system for the drive and a baffle arrangment to provide a directed suction inlet. The machine also has an Oldham coupling utilizing a novel ring element which is non-circular and provides for increased thrust-bearing size, or reduced machine size. There is also disclosed a method of manufacture of a scroll-type machine.
    Type: Grant
    Filed: May 2, 1988
    Date of Patent: October 31, 1989
    Assignee: Copeland Corporation
    Inventors: Jean-Luc M. Caillat, Roger C. Weatherston, James W. Bush