Patents by Inventor James W. Starr

James W. Starr 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: 6082182
    Abstract: A method and improved apparatus for detecting leaks in pressurized pipeline systems, which compensate for the thermally induced volume changes of the liquid in the line during a test that are produced by both the nonlinear changes in the mean temperature of the liquid and the pressure-induced perturbations of the temperature of the liquid.
    Type: Grant
    Filed: February 12, 1999
    Date of Patent: July 4, 2000
    Assignee: Vista Research, Inc.
    Inventors: Michael R. Fierro, Joseph W. Maresca, Jr., James W. Starr
  • Patent number: 5948969
    Abstract: A method and improved apparatus for detecting leaks in pressurized pipeline systems, which compensate for the thermally induced volume changes of the liquid in the line during a test that are produced by both the nonlinear changes in the mean temperature of the liquid and the pressure-induced perturbations of the temperature of the liquid.
    Type: Grant
    Filed: October 20, 1997
    Date of Patent: September 7, 1999
    Assignee: Vista Research, Inc.
    Inventors: Michael R. Fierro, Joseph W. Maresca, Jr., James W. Starr
  • Patent number: 5415033
    Abstract: An apparatus for detection of leaks in pressurized pipelines which utilizes a large pressure vessel and a small measurement vessel. The measurement vessel magnifies level changes during leak detection tests. The apparatus is connected to a pipeline through the measurement vessel. The entire system can be filled with liquid from the pipeline by opening a valve between the measurement and pressure vessels. Leak detection tests are conducted by measuring changes in volume with the measurement vessel over time while the pressure over the liquid in the pressure vessel and measurement vessel is maintained approximately constant. During tests, liquid communication between the measurement vessel and pressure vessel is prevented by closing the valve between them, but vapor communication between the vessels is permitted.
    Type: Grant
    Filed: December 17, 1993
    Date of Patent: May 16, 1995
    Assignee: Vista Research, Inc.
    Inventors: Joseph W. Maresca, Jr., James W. Starr, Christopher Wilson, Richard F. Wise
  • Patent number: 5375455
    Abstract: A method for measuring thermally corrected leak rates in a pressurized pipeline system. The pipeline system is pressurized to at least two different pressures, and changes of volume of product required to maintain approximately constant pressure are measurized at each pressure. A temperature-compensated volume rate is computed.
    Type: Grant
    Filed: July 26, 1993
    Date of Patent: December 27, 1994
    Assignee: Vista Research, Inc.
    Inventors: Joseph W. Maresca, Jr., James W. Starr, Christopher Wilson
  • Patent number: 5263371
    Abstract: A method for measuring the temperature-compensated change in the height of a surface of a liquid. The method positions an acoustic signal transducer for emitting and receiving acoustic signals below the surface of the liquid, positions a quasi-static reference device with a fiducial such that the fiducial lies within a predetermined range below the surface of the liquid, and positions one or more fiducials below the surface of the liquid to establish points separated by known distances. The transducer emits acoustic signals, and receives their reflections. The travel times of the reflections from the liquid surface and the fiducials are used to calculate changes in travel times during the measurement period, to estimate the speed of sound in the liquid, to correct for temperature-induced changes in the travel times, and to obtain a temperature-compensated change in travel time to the liquid surface.
    Type: Grant
    Filed: January 30, 1992
    Date of Patent: November 23, 1993
    Inventors: Joseph W. Maresca, Jr., James W. Starr, Christopher P. Wilson
  • Patent number: 5228339
    Abstract: An apparatus for measuring liquid levels and leak rates in a storage tank, using an acoustic transducer and a quasi-static reference device that positions an acoustic target within a predetermined distance range below the surface of the liquid.
    Type: Grant
    Filed: April 28, 1992
    Date of Patent: July 20, 1993
    Inventors: Joseph W. Maresca, Jr., James W. Starr, Christopher P. Wilson
  • Patent number: 5189904
    Abstract: The piston displacement apparatus and method for detection of leaks in pressurized pipelines disclosed herein measures volume changes at different pressures to determine thermally compensated leak rates. The apparatus uses a piston displacement apparatus to precisely determine volume changes.
    Type: Grant
    Filed: January 3, 1992
    Date of Patent: March 2, 1993
    Assignee: Vista Research, Inc.
    Inventors: Joseph W. Maresca, Jr., James W. Starr, Christopher P. Wilson
  • Patent number: 5170657
    Abstract: The apparatus and method for detection of leaks in pressurized pipelines disclosed herein measures thermally compensated leak rates. The apparatus uses an acoustic sensor and fiducial reference system to precisely determine leak rates.
    Type: Grant
    Filed: January 3, 1992
    Date of Patent: December 15, 1992
    Assignee: Vista Research, Inc.
    Inventors: Maresca, Jr. Joseph W., Christopher P. Wilson, James W. Starr
  • Patent number: 5163314
    Abstract: The gas pressure control apparatus and method for detection of leaks in pressurized pipelines disclosed herein measures thermally compensated leak rates. The apparatus uses a pressure vessel and gas pressure control system to precisely determine leak rates.
    Type: Grant
    Filed: January 3, 1992
    Date of Patent: November 17, 1992
    Assignee: Vista Research, Inc.
    Inventors: Joseph W. Maresca, Jr., James W. Starr, Christopher P. Wilson
  • Patent number: 5146784
    Abstract: The improved device for measuring liquid-level changes in storage tanks uses a float to track vertical displacement of the surface of a liquid and a linear variable differential transducer (LVDT) sensor positioned below the surface of the liquid to measure changes in the surface level. The center of gravity of the device is located below the center of buoyancy, thereby minimizing instability of the LVDT sensor.
    Type: Grant
    Filed: March 4, 1991
    Date of Patent: September 15, 1992
    Assignee: Vista Research, Inc.
    Inventors: Joseph W. Maresca, Jr., James W. Starr, Richard F. Wise
  • Patent number: 5127266
    Abstract: Methods for measuring liquid levels and leak rates in a storage tank, using an acoustic transducer and a quasi-static reference device that positions an acoustic target within a predetermined distance range below the surface of the liquid. A method for measuring the height of the surface of a liquid, i.e., liquid level.
    Type: Grant
    Filed: September 19, 1990
    Date of Patent: July 7, 1992
    Assignee: Vista Research, Inc.
    Inventors: Joseph W. Maresca, James W. Starr, Christopher P. Wilson
  • Patent number: 5090234
    Abstract: The positive-displacement pump apparatus and method for detection of leaks in pressurized pipelines disclosed herein measures volume changes at different pressures to determine thermally compensated leak rates. The apparatus uses a positive-displacement pump apparatus to precisely determine volume changes.
    Type: Grant
    Filed: August 30, 1990
    Date of Patent: February 25, 1992
    Assignee: Vista Research, Inc.
    Inventors: Joseph W. Maresca, Jr., James W. Starr, Christopher P. Wilson
  • Patent number: 5078006
    Abstract: A method of determining the presence and temperature compensated volumetric flow rate of leaks in fluid pressurized pipelines. The pipeline is maintained at a first pressure and the fluid volume change per unit time is calculated. The pressure is then maintained at a second different pressure and a second fluid volume change per unit time is calculated. The system is then maintained at the first pressure while a third fluid volume change per unit time is calculated. The first and third rates are combined with the second rate to obtain a temperature compensated leak volumetric flow rate.
    Type: Grant
    Filed: August 30, 1990
    Date of Patent: January 7, 1992
    Assignee: Vista Research, Inc.
    Inventors: Joseph W. Maresca, Jr., James W. Starr, Christopher P. Wilson