[특허]Line leak test apparatus measuring rate of pressure change in a liquid storage and dispensing system

Line leak test apparatus measuring rate of pressure change in a liquid storage and dispensing system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01M-003/08 G06F-019/00
출원번호	US-0164978 (1993-12-07)
발명자 / 주소	Slocum Laurence S. (Indianapolis IN) Clouser Michael T. (Indianapolis IN) Nelson David J. (Indianapolis IN)
출원인 / 주소	Emerson Electric Co. (St. Louis MO 02)
인용정보	피인용 횟수 : 41 인용 특허 : 0

초록 ▼

A line leak test probe for use on a liquid conduit. A pressure transducer is mounted in mechanical contact with the liquid in the conduit and a temperature transducer is mounted in thermal contact with the liquid. The transducers provide signals to a microprocessor-based circuit which includes a timer. Software stored in the microprocessor analyzes the time rate of change of the pressure to determine if there is a leak. Normally a sequence of three tests are performed: a catastrophic test, a gross test, and a precision test. The catastrophic test exits to the gross test if the rate of change of the pressure is less than a first rate, and the gross test exits to the precision test if the rate of change is less than a second rate which is less than the first rate. The precision test normally cycles until the pressure drops below 4 psi, and then outputs a leak signal if the pressure drops to below 3 psi in 12 minutes or less. If the temperature change during the test is sufficient to account for the pressure change, or the temperature is out of a range where it can be measured, the test aborts without outputting a leak signal.

대표청구항 ▼

A line leak test probe for use in a liquid storage and dispensing system, said probe comprising: pressure transducer means for providing a pressure signal representative of the pressure in a liquid conduit; timing means for providing a timing signal; and leak test means responsive to said pressure signal and said timing signal to establish an initial pressure and compare said initial pressure against a current pressure to establish a pressure rate of change and said initial pressure is compared against predetermined pressure values over a period of time to determine if said system is leaking wherein; said leak test means comprises first test means for leak testing said system over a first time period and second test means for leak testing said system over a second time period that is longer than said first time period.

이 특허를 인용한 특허 (41)

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Gray Larry ; Bryant Robert ; Spencer Geoffrey, Apparatus and method for detection of a leak in a membrane of a fluid flow control system.
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Fitzsimmons, John A.; Kline, Thomas A.; White, Patrick F., Detecting leaks in a fluid cooling system by sensing for a drop of fluid pressure in the system.
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Wilt, Michael J.; Demers, Jason A.; Grant, Kevin L.; Tracey, Brian D.; Dale, James D., Hemodialysis systems and methods.
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Seitter Larry E. (Olathe KS) Bradshaw Jerry W. (Olathe KS), Leak detection method and system for product lines in fuel dispensing systems.
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Lukas Paul ; Gagnon Daniel F. ; Johnson Daniel ; Farrar Christopher D. ; Knight John D. ; Gillis John J., Line leak detection.
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Jarvie, Ian F., Line leak detector and method of using same.
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Jarvie, Ian F., Line leak detector and method of using same.
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Kenney, Donald P.; Simmons, Walt, Method and apparatus for continuously monitoring interstitial regions in gasoline storage facilities and pipelines.
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Kenney, Donald P.; Simmons, Walt, Method and apparatus for continuously monitoring interstitial regions in gasoline storage facilities and pipelines.
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Kenney,Donald P.; Simmons,Walt, Method and apparatus for continuously monitoring interstitial regions in gasoline storage facilities and pipelines.
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Kenney,Donald P.; Simmons,Walt, Method and apparatus for continuously monitoring interstitial regions in gasoline storage facilities and pipelines.
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Craig Weldon CA; John Edward Cook CA; Ray Rasokas CA, Method and system for aggressive cycling of leak detection pump to ascertain vapor leak size.
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Webb Michael C., Pipe coupling assembly.
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Webb Michael C., Pipe coupling assembly system and method.
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Webb Michael C., Pipe coupling assembly, system and method.
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Roger Philip Ashworth GB, Pipe leakage detection.
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Hutchinson, Ray J.; Halla, Donald D.; Dolson, Richard G.; Hart, Robert P.; Lucas, Richard K.; Reid, Kent D., Power head secondary containment leak prevention and detection system and method.
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Hutchinson,Ray J.; Halla,Donald D.; Dolson,Richard G.; Hart,Robert P.; Lucas,Richard K.; Reid,Kent D., Power head secondary containment leak prevention and detection system and method.
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Hutchinson,Ray J.; Halla,Donald D.; Dolson,Richard G.; Hart,Robert P.; Lucas,Richard K.; Reid,Kent D., Power head secondary containment leak prevention and detection system and method.
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Demers, Jason A.; Gray, Larry B.; McGill, David W., Pump cassette bank.
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Demers, Jason A.; McGill, David W.; Tracey, Brian; Dale, James D.; Gray, Larry B., Pump cassette with spiking assembly.
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Gray, Larry B.; Bryant, Jr., Robert J.; Spencer, Geoffrey P., Pump chamber configured to contain a residual fluid volume for inhibiting the pumping of a gas.
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Hutchinson,Ray J.; Halla,Donald D.; Dolson,Richard G.; Hart,Robert P.; Lucas,Richard K.; Reid,Kent D., Secondary containment leak prevention and detection system and method.
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Hutchinson,Ray J.; Halla,Donald D.; Hart,Robert P.; Dolson,Richard G.; Lucas,Richard K.; Reid,Kent D., Secondary containment leak prevention and detection system and method.
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Hutchinson,Ray J.; Halla,Donald D.; Hart,Robert P.; Dolson,Richard G.; Lucas,Richard K.; Reid,Kent D., Secondary containment leak prevention and detection system and method.
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Hutchinson, Ray J.; Halla, Donald D.; Dolson, Richard G.; Hart, Robert P.; Lucas, Richard K.; Reid, Kent D., Secondary containment leak prevention and detection system and method in fuel dispenser.
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Hutchinson,Ray J., Secondary containment system and method.
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Demers, Jason A.; Dale, James D.; Tracey, Brian; McGill, David W.; Gray, Larry B., System, device, and method for mixing a substance with a liquid.
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Demers,Jason A.; McGill,David W.; Gray,Larry B., System, device, and method for mixing liquids.
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Gray, Larry B.; Bryant, Jr., Robert J.; Spencer, Geoffrey P., System, method, and apparatus for utilizing a pumping cassette.
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Gray, Larry B.; Bryant, Jr., Robert J.; Spencer, Geoffrey P., System, method, and apparatus for utilizing a pumping cassette.
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Gray, Larry B.; Bryant, Jr., Robert J.; Spencer, Geoffrey P., System, method, and apparatus for utilizing a pumping cassette.
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Gray, Larry B.; Bryant, Jr., Robert J.; Spencer, Geoffrey P., System, method, and apparatus for utilizing a pumping cassette.
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Gray, Larry B.; Bryant, Jr., Robert J.; Spencer, Geoffrey P., System, method, and apparatus for utilizing a pumping cassette.
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Demers,Jason A.; Harris,Matthew C.; McGill,David W.; Gray,Larry B.; Staub,Edward J., Two-stage mixing system, apparatus, and method.
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Kenney Donald P. (McFarland WI) Triezenberg David M. (Fort Wayne IN), Variable speed pump-motor assembly for fuel dispensing system.
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Kenney Donald P. ; Triezenberg David M., Variable speed pump-motor assembly for fuel dispensing system.
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Kenney Donald P. ; Triezenberg David M., Variable speed pump-motor assembly for fuel dispensing system.
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Kenney Donald P. ; Triezenberg David M., Variable speed pump-motor assembly for fuel dispensing system.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
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연합인증

Line leak test apparatus measuring rate of pressure change in a liquid storage and dispensing system 원문보기

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Line leak test apparatus measuring rate of pressure change in a liquid storage and dispensing system 원문보기

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이 특허를 인용한 특허 (41)

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