Patents by Inventor Vishnu Mohan Sishtla

Vishnu Mohan Sishtla 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).

  • ALTERNATE FLOW OF DISCHARGE GAS TO A VAPORIZER FOR A SCREW COMPRESSOR
    Publication number: 20040098996
    Abstract: A system for reclaiming oil from a combined refrigerant/oil liquid mixture at an evaporator takes a tap of discharge pressure refrigerant from a screw compressor. This hot refrigerant is utilized to boil off refrigerant in the combined liquid refrigerant/oil mixture in a vaporizer. The separated oil is returned to an oil sump and utilized to lubricate the compressor. The tapped discharge pressure refrigerant can be tapped from two distinct locations, and each of these taps receives a valve. The two valves are controlled based upon system conditions. The two valves are selectively opened and closed to provide the hottest temperature refrigerant to the vaporizer to achieve the maximum separation efficiency.
    Type: Application
    Filed: November 27, 2002
    Publication date: May 27, 2004
    Inventor: Vishnu Mohan Sishtla
  • Alternate flow of discharge gas to a vaporizer for a screw compressor
    Patent number: 6739147
    Abstract: A system for reclaiming oil from a combined refrigerant/oil liquid mixture at an evaporator takes a tap of discharge pressure refrigerant from a screw compressor. This hot refrigerant is utilized to boil off refrigerant in the combined liquid refrigerant/oil mixture in a vaporizer. The separated oil is returned to an oil sump and utilized to lubricate the compressor. The tapped discharge pressure refrigerant can be tapped from two distinct locations, and each of these taps receives a valve. The two valves are controlled based upon system conditions. The two valves are selectively opened and closed to provide the hottest temperature refrigerant to the vaporizer to achieve the maximum separation efficiency.
    Type: Grant
    Filed: November 27, 2002
    Date of Patent: May 25, 2004
    Assignee: Carrier Corporation
    Inventor: Vishnu Mohan Sishtla