Patents by Inventor Kevin George O'Sullivan

Kevin George O'Sullivan 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).

  • Mobile constant pressure pumping assembly
    Patent number: 6551073
    Abstract: The present invention is an assembly for pumping liquid at a constant, preselected outlet pressure, and includes an engine connected to a variable displacement hydraulic pump driven by the engine. A fixed displacement hydraulic motor driven by the variable displacement hydraulic pump includes a motor speed transducer. The fixed displacement hydraulic motor drives a liquid pump and contains a liquid outlet pressure transducer. A controller device modulates the output of the variable displacement hydraulic pump. The controller device is in communication with the liquid pump outlet pressure transducer, and with the fixed displacement hydraulic motor speed transducer. The controller thereby modulates the hydraulic output of the variable displacement hydraulic pump to maintain a constant, preselected liquid pump outlet pressure that is independent of engine speed and within the fixed displacement hydraulic motor speed maximum.
    Type: Grant
    Filed: October 26, 2001
    Date of Patent: April 22, 2003
    Assignee: W. S. Darley & Co.
    Inventor: Kevin George O'Sullivan