Patents by Inventor Peter J. Flanagan

Peter J. Flanagan 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: 8982989
    Abstract: In a process variable transmitter, a sensor signal is sampled, using a clock signal, at a sensor sampling frequency. Interference is also sampled at the sensor sampling frequency. A comparison is made to determine whether the interference at the sensor sampling frequency or harmonics of the sensor sampling frequency exceed a threshold level. If so, the clock signal is changed to adjust the sensor sampling frequency away from the frequency of the interference.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: March 17, 2015
    Assignee: Rosemount Inc.
    Inventors: Peter J. Flanagan, David G. Tyson, John P. Schulte, Eugene Korolev
  • Publication number: 20150003560
    Abstract: In a process variable transmitter, a sensor signal is sampled, using a clock signal, at a sensor sampling frequency. Interference is also sampled at the sensor sampling frequency. A comparison is made to determine whether the interference at the sensor sampling frequency or harmonics of the sensor sampling frequency exceed a threshold level. If so, the clock signal is changed to adjust the sensor sampling frequency away from the frequency of the interference.
    Type: Application
    Filed: June 28, 2013
    Publication date: January 1, 2015
    Applicant: ROSEMOUNT INC.
    Inventors: Peter J. Flanagan, David G. Tyson, John P. Schulte, Eugene Korolev
  • Publication number: 20090288790
    Abstract: A method of and apparatus for treating a green liquor stream produced in a kraft pulp process to separate green liquor from dregs present in the stream by utilizing a filtration vessel that has a pressure differential between the green liquor inlet and outlet to drive the dregs from the green liquor. In addition, negative pressure is utilized in the filtration vessel to thereby drive water vapor from and consequently cool the filtered green liquor.
    Type: Application
    Filed: May 22, 2008
    Publication date: November 26, 2009
    Inventors: Peter J. Flanagan, John B. Johnson, II
  • Patent number: 7005067
    Abstract: A positive pressure disc-type filtration apparatus including a collection trough internal to the cylindrical pressure vessel housing the filter discs. The collection trough is entirely disposed within the cylinder of the pressure vessel and configured and located to receive and direct filter cake removed from the discs and then reslurried and sluiced toward the center of the trough using jets of liquid, to be discharged longitudinally centrally through a single outlet extending downwardly from the trough and through the wall of the pressure vessel. A method of filtration is also disclosed.
    Type: Grant
    Filed: December 6, 2001
    Date of Patent: February 28, 2006
    Assignee: GL&V Management Hungary KFT
    Inventor: Peter J. Flanagan
  • Patent number: 6833077
    Abstract: A precoat renewal system for a filter, such as a disc filter. The renewal system includes a plurality of nozzles coupled to spray piping and valving with each nozzle being positioned for spraying an area of one side of a disc. The nozzles and at least a portion of the spray piping is movable such that the nozzles may be displaced relative to the discs. The nozzles and piping are arranged in groups or zones with each zone covering a specified percentage of the discs in the filter and each zone representing about 40% or less of the surface area of the filter media of the discs in the filter. The system may be configured such that high pressure fluid may be supplied to that particular zone for removal of a precoat layer on the disc while other zones may be concurrently washed with a lower pressure fluid.
    Type: Grant
    Filed: April 19, 2002
    Date of Patent: December 21, 2004
    Assignee: GL&V Management Hungary Kft.
    Inventor: Peter J. Flanagan
  • Publication number: 20040045913
    Abstract: A positive pressure disc-type filtration apparatus (10) including a collection trough (40) internal to the cylindrical pressure vessel housing the filter discs (24). The collection trough (40) is entirely disposed within the cylinder of the pressure vessel (12) and configured and located to receive and direct filter cake removed from the discs (24) and then reslurried and sluiced toward the center of the trough using jets of liquid (32), to be discharged longitudinally centrally through a single outlet extending downwardly from the trough and through the wall of the pressure vessel (12). A method of filtration is also disclosed.
    Type: Application
    Filed: June 12, 2003
    Publication date: March 11, 2004
    Inventor: Peter J. Flanagan
  • Publication number: 20020166822
    Abstract: A precoat renewal system for a filter, such as a disc filter. The renewal system includes a plurality of nozzles coupled to spray piping and valving with each nozzle being positioned for spraying an area of one side of a disc. The nozzles and at least a portion of the spray piping is movable such that the nozzles may be displaced relative to the discs. The nozzles and piping are arranged in groups or zones with each zone covering a specified percentage of the discs in the filter and each zone representing about 40% or less of the surface area of the filter media of the discs in the filter. Each zone is configured such that high pressure fluid may be supplied to that particular zone for removal of a precoat layer on the disc. The system may be configured so that other zones may be concurrently washed with a lower pressure fluid. The zones may be sequentially or otherwise segmentally provided with high pressure fluid until the precoat layers of each respective zone have been removed and renewed.
    Type: Application
    Filed: April 19, 2002
    Publication date: November 14, 2002
    Inventor: Peter J. Flanagan
  • Publication number: 20020166821
    Abstract: A disc-type filtration apparatus including at least one filter element and a shower system configured to wash media portions on sides the at least one filter element as the filter element moves rotationally downward toward and into a slurry reservoir and subsequent to scraping of filter cake therefrom. The shower system may be fixed and extend across the sides of the filter element or, alternatively, the shower system may include a movable head which is caused to traverse radially across the sides of the filter element. The shower system may be operated on a discontinuous or periodic basis or, optionally, on a continuous basis. Methods of operation of a filtration apparatus are also disclosed.
    Type: Application
    Filed: April 19, 2002
    Publication date: November 14, 2002
    Inventor: Peter J. Flanagan