Acoustic tracing of buried conduits

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5412989
SERIAL NO

07997312

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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Buried fluid containing conduits, such as natural gas lines, are located by providing variable frequency sinusoidal excitation acoustic signals over a broad frequency range to the fluid content of the conduit so that the conduit will vibrate and cause elastic vibration in the media in which such conduit is buried. A plurality of measurements of said vibrations are taken on the surface of the media or ground in which such conduit is buried. The measurements are taken laterally of the estimated position of the conduit. The position of the conduit is determined by changes in the characteristics of the vibrations caused by the differences in distances between the pipe and the measurements.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
COLUMBIA GAS OF OHIO, INC.COLUMBUS, OH6

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Eberle, Arthur C Upper Arlington, OH 6 55
Fabian, John L Columbus, OH 1 7
Farstad, Jerry E Columbus, OH 3 46

Cited Art Landscape

Patent Info (Count) # Cites Year
 
I/O EXPLORATION PRODUCTS, INC. (1)
* 5010531 Three-dimensional geophone 43 1989
 
SOUTHERN CALIFORNIA GAS COMPANY (1)
* 5127267 Acoustic method for locating concealed pipe 10 1991
 
INSTITUTE OF GAS TECHNOLOGY DBA GAS TECHNOLOGY INSTITUTE (1)
* 5027644 Method and apparatus for injecting acoustic signals into live gas mains 5 1990
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (2)
8116994 Method for locating an underground septic tank, conduit, or the like using injection/detection synchronization of an acoustic signal and digital signal processing 0 2008
* 2009/0112,476 Method for Locating an Underground Septic Tank, Conduit, or the Like Using Injection/Detection Synchronization of an Acoustic Signal and Digital Signal Processing 2 2008
 
See Scan, Inc. (1)
* 9082269 Haptic directional feedback handles for location devices 0 2012
 
VISTA ENGINEERING TECHNOLOGIES, INC. (1)
* 6003376 Acoustic system for measuring the location and depth of underground pipe 28 1998
 
CSI TECHNOLOGY, INC. (1)
* 2009/0040,227 Indicators for Interactive Analysis of Virtual Three-Dimensional Machine Data 1 2007
 
WILLIAM REBER, L.L.C. (1)
* 5790476 Methods and systems for locating an underground sewer using a buoy 3 1997
 
TOHOKU TECHNO ARCH CO., LTD. (1)
* 6694815 Liquefaction phenomenon prediction system 1 2003
 
MITSUBISHI ELECTRIC RESEARCH LABORATORIES, INC. (2)
* 9281875 System and method for automatically optimizing wireless power 0 2011
* 2012/0217,818 System and Method for Automatically Optimizing Wireless Power 8 2011
 
COMPUTATIONAL SYSTEMS, INC. (2)
8648860 Graphics tools for interactive analysis of three-dimensional machine data 1 2007
* 2009/0044,181 Graphics Tools for Interactive Analysis of Three-Dimensional Machine Data 1 2007
 
SEEKTECH, INC. (1)
* 2013/0207,791 HAPTIC DIRECTIONAL FEEDBACK HANDLES FOR LOCATION DEVICES 2 2012
* Cited By Examiner