Patents by Inventor Peter D. Petroff

Peter D. Petroff 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).

  • Flow analyzer
    Patent number: 4630474
    Abstract: A sewer flow measurement method and system for determining flow conditions of a sewer line system wherein separately located monitors make and record precisely synchronized and time identifiable pressure measurements, utilizing pressure-to-signal transducers positioned on the bottom of pipes where they exit into manholes. A cassette recorder records the different pressure related signals from the monitors together with a discrete identification signal from each monitor. The outputs of the recorder are then fed to a pressure-to-flow computer which provides location identified, time synchronized, flow data for the system.
    Type: Grant
    Filed: September 26, 1983
    Date of Patent: December 23, 1986
    Inventor: Peter D. Petroff
  • Flow analyzer
    Patent number: 4407158
    Abstract: A sewer flow measurement method and system for determining flow conditions of a sewer line system wherein separately located monitors make and record precisely synchronized and time identifiable pressure measurements, utilizing pressure-to-signal transducers positioned on the bottom of pipes where they exit into manholes. A cassette recorder records the different pressure related signals from the monitors together with a discrete identification signal from each monitor. The outputs of the recorder are then fed to a pressure-to-flow computer which provides location identified, time-synchronized, flow data for the system.
    Type: Grant
    Filed: August 13, 1982
    Date of Patent: October 4, 1983
    Inventor: Peter D. Petroff
  • Flow analyzer
    Patent number: 4344329
    Abstract: A sewer flow measurement system for determining flow conditions of a sewer line system wherein separately located monitors make and record precisely synchronized and time identified pressure measurements, utilizing pressure-to-signal transducers positioned on the bottom of pipes where they exit into manholes. A cassette recorder records the different pressure related signals from the monitors together with a discrete identification signal from each monitor. The outputs of the recorder are then fed to a pressure-to-flow computer which provides location identified, time synchronized, flow data for the system.
    Type: Grant
    Filed: May 18, 1981
    Date of Patent: August 17, 1982
    Inventor: Peter D. Petroff
  • Infiltration-inflow sewer line analyzer
    Patent number: 4295197
    Abstract: A method and means of determining inflow (undesired pipe drains to a sewer) and infiltration (sewer pipe leakage) into sewer lines by a coordinate measurement of pressure in sewer pipes at several locations, particularly measuring flow during rainfall and for a discrete period thereafter and comparing the results with dry periods.
    Type: Grant
    Filed: December 17, 1979
    Date of Patent: October 13, 1981
    Inventor: Peter D. Petroff
  • Infiltration-inflow sewer line analyzer
    Patent number: 4211111
    Abstract: A method and means of determining inflow (undesired pipe drains to a sewer) and infiltration (sewer pipe leakage) into sewer lines by a coordinate measurement of pressure in sewer pipes at several locations, particularly measuring flow during rainfall and for a discrete period thereafter and comparing the results with dry periods.
    Type: Grant
    Filed: May 12, 1978
    Date of Patent: July 8, 1980
    Inventor: Peter D. Petroff
  • Sewer line analyzer probe
    Patent number: 4116061
    Abstract: A method and means of determining inflow (undesired pipe drains to a sewer) and infiltration (sewer pipe leakage) into sewer lines by a coordinate measurement of pressure in sewer pipes at several locations, particularly measuring flow during rainfall and for a discrete period thereafter and comparing the results with dry periods.
    Type: Grant
    Filed: June 30, 1977
    Date of Patent: September 26, 1978
    Inventor: Peter D. Petroff
  • Infiltration-inflow sewer line analyzer
    Patent number: 4070563
    Abstract: A method and means of determining inflow (undesired pipe drains to a sewer) and infiltration (sewer pipe leakage) into sewer lines by a coordinate measurement of pressure in sewer pipes at several locations, particularly measuring flow during rainfall and for a discrete period thereafter and comparing the results with dry periods.
    Type: Grant
    Filed: August 8, 1975
    Date of Patent: January 24, 1978
    Inventor: Peter D. Petroff