Patents by Inventor Peter P. Guzman

Peter P. Guzman 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).

  • Start-up control for refrigeration system
    Patent number: 8776541
    Abstract: A transport refrigeration system has an engine driving an electric generator. A compressor is powered by the generator. At least one first electric fan is positioned to drive an airflow across a heat rejection heat exchanger. At least one second electric fan is positioned to drive an airflow across a heat absorption heat exchanger. A controller is coupled to the compressor and first and second fans. The controller is configured to: start the engine; engage the generator and at least one of the first fans before the engine has reached running speed; after the engine has reached running speed, start the compressor; and after starting the compressor, start at least one of the second fans.
    Type: Grant
    Filed: July 1, 2009
    Date of Patent: July 15, 2014
    Assignee: Carrier Corporation
    Inventors: John T. Steele, Scott D. Fulmer, Peter P. Guzman, Donald B. Hotaling, John R. Reason
  • Method for determining air filter condition
    Patent number: 8573040
    Abstract: A sensor that is designed for determining ambient pressure for purposes of derating an internal combustion engine at high altitudes, is used to determine the condition of the air filter by taking pressure measurements in the intake manifold before and after the engine is started, with the difference then being an indication of the condition of the air filter.
    Type: Grant
    Filed: April 23, 2009
    Date of Patent: November 5, 2013
    Assignee: Carrier Corporation
    Inventors: Peter P. Guzman, John R. Reason, Nader S. Awwad, John T. Steele
  • Two speed control for mobile refrigeration generators
    Patent number: 8487458
    Abstract: A current sensor is installed in a generator set to measure the current being delivered from the generator set to a refrigeration unit. A control is responsive to the current transformer to reduce the speed of the drive engine to a lower speed when the current being delivered to the refrigeration unit is determined to be below a predetermined higher level. Provision is made to override the system when the sensed current is determined to be transient caused or in the event that ambient temperature is determined to be above a predetermined temperature threshold.
    Type: Grant
    Filed: January 17, 2008
    Date of Patent: July 16, 2013
    Assignee: Carrier Corporation
    Inventors: John T. Steele, Peter P. Guzman, Jeffrey J. Burchill, Martin Murphy Mertell, Douglas R. Auyer, Cheryl M. Keiling
  • METHOD FOR DETERMINING AIR FILTER CONDITION
    Publication number: 20110094297
    Abstract: A sensor that is designed for determining ambient pressure for purposes of derating an internal combustion engine at high altitudes, is used to determine the condition of the air filter by taking pressure measurements in the intake manifold before and after the engine is started, with the difference then being an indication of the condition of the air filter.
    Type: Application
    Filed: April 23, 2009
    Publication date: April 28, 2011
    Inventors: Peter P. Guzman, John R. Reason, Nader S. Awwad, John T. Steele
  • Start-Up Control for Refrigeration System
    Publication number: 20110088411
    Abstract: A transport refrigeration system has an engine driving an electric generator. A compressor is powered by the generator. At least one first electric fan is positioned to drive an airflow across a heat rejection heat exchanger. At least one second electric fan is positioned to drive an airflow across a heat absorption heat exchanger. A controller is coupled to the compressor and first and second fans. The controller is configured to: start the engine; engage the generator and at least one of the first fans before the engine has reached running speed; after the engine has reached running speed, start the compressor; and after starting the compressor, start at least one of the second fans.
    Type: Application
    Filed: July 1, 2009
    Publication date: April 21, 2011
    Applicant: CARRIER CORPORATION
    Inventors: John T. Steele, Scott D. Fulmer, Peter P. Guzman, Donald B. Hotaling, John R. Reason
  • TWO SPEED CONTROL FOR MOBILE REFRIGERATION GENERATORS
    Publication number: 20100289273
    Abstract: A current sensor is installed in a generator set to measure the current being delivered from the generator set to a refrigeration unit. A control is responsive to the current transformer to reduce the speed of the drive engine to a lower speed when the current being delivered to the refrigeration unit is determined to be below a predetermined higher level. Provision is made to override the system when the sensed current is determined to be transient caused or in the event that ambient temperature is determined to be above a predetermined temperature threshold.
    Type: Application
    Filed: January 17, 2008
    Publication date: November 18, 2010
    Applicant: CARRIER CORPORATION
    Inventors: John T. Steele, Peter P. Guzman, Jeffrey J. Burchill, Martin Murphy Mertell, Douglas R. Auyer, Cheryl M. Keiling