Patents by Inventor John Willard Tolbert

John Willard Tolbert 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).

  • System and method for compressor capacity modulation in a heat pump
    Patent number: 8650894
    Abstract: A system and method is provided to control and operate a compressor to have two or more discrete output capacities in response to an outdoor temperature measurement. During operation of the compressor in an air conditioning or cooling mode, the compressor has a first output capacity in response to the outdoor temperature being greater than a first temperature setpoint and the compressor has a second output capacity in response to the outdoor temperature being less than a second temperature setpoint. During operation of the compressor in a heating mode, the compressor has different output capacities based on the outdoor ambient temperature.
    Type: Grant
    Filed: July 6, 2009
    Date of Patent: February 18, 2014
    Assignee: Bristol Compressors International, Inc.
    Inventor: John Willard Tolbert, Jr.
  • System and method for compressor capacity modulation
    Patent number: 7628028
    Abstract: A system and method is provided to control and operate a compressor to have two or more discrete output capacities in response to an outdoor temperature measurement. During operation of the compressor in an air conditioning or cooling mode, the compressor has a first output capacity in response to the outdoor temperature being greater than a first temperature setpoint and the compressor has a second output capacity in response to the outdoor temperature being less than a second temperature setpoint.
    Type: Grant
    Filed: August 3, 2005
    Date of Patent: December 8, 2009
    Assignee: Bristol Compressors International, Inc.
    Inventors: John Willard Tolbert, Jr., Scott Garrison Hix, David Turner Monk, Jerry D. Edwards
  • SYSTEM AND METHOD FOR COMPRESSOR CAPACITY MODULATION IN A HEAT PUMP
    Publication number: 20090266091
    Abstract: A system and method is provided to control and operate a compressor to have two or more discrete output capacities in response to an outdoor temperature measurement. During operation of the compressor in an air conditioning or cooling mode, the compressor has a first output capacity in response to the outdoor temperature being greater than a first temperature setpoint and the compressor has a second output capacity in response to the outdoor temperature being less than a second temperature setpoint. During operation of the compressor in a heating mode, the compressor has different output capacities based on the outdoor ambient temperature.
    Type: Application
    Filed: July 6, 2009
    Publication date: October 29, 2009
    Applicant: BRISTOL COMPRESSORS INTERNATIONAL, INC.
    Inventor: John Willard Tolbert, JR.
  • SYSTEM AND METHOD FOR COMPRESSOR CAPACITY MODULATION IN A HEAT PUMP
    Publication number: 20080041081
    Abstract: A system and method is provided to control and operate a compressor to have two or more discrete output capacities in response to an outdoor temperature measurement. During operation of the compressor in an air conditioning or cooling mode, the compressor has a first output capacity in response to the outdoor temperature being greater than a first temperature setpoint and the compressor has a second output capacity in response to the outdoor temperature being less than a second temperature setpoint. During operation of the compressor in a heating mode, the compressor has different output capacities based on the outdoor ambient temperature.
    Type: Application
    Filed: August 15, 2006
    Publication date: February 21, 2008
    Applicant: BRISTOL COMPRESSORS, INC.
    Inventor: John Willard TOLBERT
  • System and method for soft starting a three phase motor
    Patent number: 6781342
    Abstract: A three phase motor starting system is provided to reduce the in-rush current to the motor in order to obtain a soft start of the motor. The soft start of the motor equates to reduced impact forces on motor parts and device components connected to the motor during startup of the motor, especially a startup resulting from a reversal of the direction of rotation of the motor. The system uses an impedance load in series with the motor windings of the motor to reduce the in-rush current to the motor windings, which results in a reduced acceleration of the motor shaft and a soft start to the motor. The impedance loads used by the system can be a resistive load, a capacitive load or an inductive load, depending on the type of impedance load that is desired for the soft start of the motor.
    Type: Grant
    Filed: May 23, 2003
    Date of Patent: August 24, 2004
    Assignee: Bristol Compressors, Inc.
    Inventors: John Willard Tolbert, Jr., David Turner Monk, Joseph Frank Loprete, Tyrone Scott Simerly, Bradley Todd Arnold
  • System and method for soft starting a three phase motor
    Publication number: 20030222609
    Abstract: A three phase motor starting system is provided to reduce the in-rush current to the motor in order to obtain a soft start of the motor. The soft start of the motor equates to reduced impact forces on motor parts and device components connected to the motor during startup of the motor, especially a startup resulting from a reversal of the direction of rotation of the motor. The system uses an impedance load in series with the motor windings of the motor to reduce the in-rush current to the motor windings, which results in a reduced acceleration of the motor shaft and a soft start to the motor. The impedance loads used by the system can be a resistive load, a capacitive load or an inductive load, depending on the type of impedance load that is desired for the soft start of the motor.
    Type: Application
    Filed: May 23, 2003
    Publication date: December 4, 2003
    Applicant: Bristol Compressors
    Inventors: John Willard Tolbert, David Turner Monk, Joseph Frank Loprete, Tyrone Scott Simerly, Bradley Todd Arnold