Patents by Inventor Sakin R. Cakmakci

Sakin R. Cakmakci 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).

  • Patent number: 6691525
    Abstract: Methods and systems consistent with this invention control a hot gas bypass valve in a refrigeration system including a centrifugal compressor, a condenser, an evaporator, and a hot gas bypass line between the compressor and the evaporator. Such methods and systems continuously sense for a surge condition during operation of the refrigeration system, indicate a surge condition when the refrigeration system is operating under surge conditions, and open at least partially the hot gas bypass valve in response to the sensed surge condition to return the refrigeration system to operating under non-surge conditions. Methods and systems consistent with this invention also sense a present head parameter representative of the present head of the compressor, sense a present load parameter representative of the present load, and control the hot gas bypass valve so as to avoid surging in the compressor in response to the present head parameter, the present load parameter, and stored head and load parameters.
    Type: Grant
    Filed: May 21, 2002
    Date of Patent: February 17, 2004
    Assignee: York International Corporation
    Inventors: Gregory K. Beaverson, Harold B. Ginder, Dennis L. Deitz, Sakin R. Cakmakci
  • Publication number: 20020170304
    Abstract: Methods and systems consistent with this invention control a hot gas bypass valve in a refrigeration system including a centrifugal compressor, a condenser, an evaporator, and a hot gas bypass line between the compressor and the evaporator. Such methods and systems continuously sense for a surge condition during operation of the refrigeration system, indicate a surge condition when the refrigeration system is operating under surge conditions, and open at least partially the hot gas bypass valve in response to the sensed surge condition to return the refrigeration system to operating under non-surge conditions. Methods and systems consistent with this invention also sense a present head parameter representative of the present head of the compressor, sense a present load parameter representative of the present load, and control the hot gas bypass valve so as to avoid surging in the compressor in response to the present head parameter, the present load parameter, and stored head and load parameters.
    Type: Application
    Filed: May 21, 2002
    Publication date: November 21, 2002
    Applicant: York International Corporation
    Inventors: Gregory K. Beaverson, Harold B. Ginder, Dennis L. Deitz, Sakin R. Cakmakci
  • Patent number: 6427464
    Abstract: Methods and systems consistent with this invention control a hot gas bypass valve in a refrigeration system including a centrifugal compressor, a condenser, an evaporator, and a hot gas bypass line between the compressor and the evaporator. Such methods and systems continuously sense for a surge condition during operation of the refrigeration system, indicate a surge condition when the refrigeration system is operating under surge conditions, and open at least partially the hot gas bypass valve in response to the sensed surge condition to return the refrigeration system to operating under non-surge conditions. Methods and systems consistent with this invention also sense a present head parameter representative of the present head of the compressor, sense a present load parameter representative of the present load, and control the hot gas bypass valve so as to avoid surging in the compressor in response to the present head parameter, the present load parameter, and stored head and load parameters.
    Type: Grant
    Filed: April 28, 2000
    Date of Patent: August 6, 2002
    Assignee: York International Corporation
    Inventors: Gregory K. Beaverson, Harold B. Ginder, Dennis L. Deitz, Sakin R. Cakmakci
  • Patent number: 5910160
    Abstract: A refrigerant recovery system for use in connection with a refrigeration system having an evaporator, a compressor, and a condenser, and a purge unit connected to the condenser for receiving gaseous refrigerant and non-condensable gases from the condenser. A tank connects to the purge unit by a line for receiving purged gaseous refrigerant and purged non-condensable gases from the purge unit. The tank contains adsorbent material for recovering the purged gaseous refrigerant from the purged non-condensable gases. The system includes means for determining when a predetermined amount of purged gaseous refrigerant is received by the tank and means for controlling the flow of fluids to and from the tank.
    Type: Grant
    Filed: June 15, 1998
    Date of Patent: June 8, 1999
    Assignee: York International Corporation
    Inventors: Sakin R. Cakmakci, Walter A. Lobodinsky
  • Patent number: 5806322
    Abstract: A refrigerant recovery system for use in connection with a refrigeration system having an evaporator, a compressor, and a condenser, and a purge unit connected to the condenser for receiving gaseous refrigerant and non-condensable gases from the condenser. A tank connects to the purge unit by a line for receiving purged gaseous refrigerant and purged non-condensable gases from the purge unit. The tank contains adsorbent material for recovering the purged gaseous refrigerant from the purged non-condensable gases. The system includes means for determining when a predetermined amount of purged gaseous refrigerant is received by the tank and means for controlling the flow of fluids to and from the tank.
    Type: Grant
    Filed: April 7, 1997
    Date of Patent: September 15, 1998
    Assignee: York International
    Inventors: Sakin R. Cakmakci, Walter A. Lobodinsky