[특허]Pump control system

[미국특허] Pump control system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G08B-021/00
출원번호	US-0605528 (1996-02-22)
발명자 / 주소	Gibb Robert F.
출원인 / 주소	Raptor, Inc.
대리인 / 주소	Waters
인용정보	피인용 횟수 : 39 인용 특허 : 15

초록 ▼

A pump control system which can distinguish between water and oil so that a pump can be controlled to pump water and deactivated before oil is pumped. Sensing is accomplished by a pair of capacitive sensors, one located above the other in a vessel in which water accumulates. A dual mode frequency oscillator is associated with each sensor. Each sensor reacts to the dielectric constant of the liquid at the sensor by changing its capacitance, to thus detect the presence of a conductive substance, such as a liquid, to cause the sensor's oscillator to switch its mode of oscillation. The dual mode oscillator of each sensor selectively generates a control signal having two different duty cycles. As the dielectric constant of the liquid medium is sensed, a logic circuit interposed between the sensors allows the output of each sensor to be turned off when only the lower sensor is in water. The circuit turns on the pump only when both sensors are in water and the pump remains on until both sensors are out of water. An adjustable deadband is provided, thereby avoiding having the pump turning on and off with a slight water level change. Each sensor detects the difference between dielectric constants of air and of oil, in relation to that of water. As a result, the pump control system differentiates between water and oil and activates the system to pump water while deactivating the system before oil on the water surface is pumped.

대표청구항 ▼

[ What is claimed is:] [1.] In an underground vault of the type having air therewithin and having a sump for the accumulation of water and oil distributed over the surface of the accumulated water and where said air, oil and water each possesses a dielectric constant, said vault having also a pump having a motor responsive to an electrical control signal, for removing water from said sump, a system for controlling the level of water in said vault, comprising:first and second sensing means disposed in said sump in a spaced apart relationship for sensing the presence and absence of water in the space between said first and second sensing means by reacting to the differences in the dielectric constants of air, oil and water; anda logic circuit in electrical connection with said first sensing means and with said second sensing means and having an output for providing said electrical control signal to said pump, said electrical control signal having a first logic level turning on said pump signal when said first sensing means and said second sensing means react to the dielectric constant of water in said space and having a second logic level, turning off said pump, when said second sensing means reacts to the dielectric constant of air in said space and said first sensing means reacts to the dielectric constant of the oil on the surface of the water whereby substantially all of the water is removed from said vault while the oil is retained in said vault.

이 특허에 인용된 특허 (15) 인용/피인용 타임라인 분석

Larson Roger G. (911 Laguna Rd. Fullerton CA 92635), Apparatus for determining the liquid level in a tank.
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Kuhlman George A. (St. Charles IL), Capacitance level sensor for use with viscous, electrically conductive materials.
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Worthington Ralph T. (4733 Mt. St. Helens Ct. San Diego CA 92117), Capacitance liquid level sensing and touch control system.
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Fathauer George H. (Mesa AZ) Hood Charles F. (Mesa AZ), Capacitance-type material level indicator.
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Goekler Lewis E. (Cincinnati OH), Capacitive liquid level sensor.
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Huddart John (4 Ingleside Grove London SE3 7PH GB2) Huddart Robin (4 Ingleside Grove London SE3 7PH GB2), Capacitive measuring apparatus.
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Maier ; Lawrence C., Digital liquid-level gauging systems.
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Strickler Steven E. (Jamestown CO) Simmons Jerry C. (Broomfield CO) Golladay James (Jackson WY) Goldstein Andrew D. (Boulder CO), Fluid measuring, testing and accounting system.
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Myers Ronald V. (Basingstoke GB2) Thrift Peter R. (Basingstoke GB2), Fluid-gauging systems.
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Myers Ronald V. (Basingstoke GBX), Fluid-gauging systems.
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Collins J. Randall (Fort Wayne IN) Cohn Ralph F. (Waltham MA), Gasoline dispenser leak detectors and automatic shut-off systems.
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Tanaka Masaya (Tokyo JPX) Ono Mitsuo (Koganei JPX) Degawa Sadao (Tanashi JPX), Liquid leakage detection system.
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Haynes ; Edward M., Method and apparatus for detecting water in oil.
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Venema Harry J. (Wheaton IL), Method and apparatus for water removal from oil in submersible motor environment.
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Izaguirre Albert L. (12064 W. Jody Dr. Boise ID 83704), Method, system, and apparatus for operating large power generating stations with improved environmental protection measu.
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이 특허를 인용한 특허 (39) 인용/피인용 타임라인 분석

Williams, David M.; Goodenbery, Jeffrey D.; Waldron, Randall D, Alarm system for a sump pump assembly.
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Stiles, Jr., Robert W.; Berthelsen, Lars Hoffmann; Westermann-Rasmussen, Peter; Kjaer, Gert; Lungeanu, Florin, Anti-entrapment and anti-dead head function.
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Boese, Thomas G.; Bishop, Michael B.; Ambrose, Jeffrey C.; Emerson, John; Paton, David E.; Mazza, Joseph J., Battery backup sump pump systems and methods.
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Ward, Charles Barry, Condensate pump.
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Ward, Charles Barry, Condensate pump.
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Schuppe Alfred ; Dringenburg Dean H. ; Schneider Matthew L. ; Weng Weibo ; French Mike, Continuous liquid level measurement system.
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Stiles, Jr., Robert W.; Berthelsen, Lars Hoffmann; Robol, Ronald B.; Cox, Everett; Steen, Donald; Murphy, Kevin; Hruby, Daniel J.; Westermann-Rasmussen, Peter; Kjaer, Gert; Harvest, Nils-Ole; Yahnker, Christopher; Woodcock, Jr., Walter; Runarsson, Einar Kjartan; Hansen, Arne Fink; Morando, Alberto; Lungeanu, Florin, Control algorithm of variable speed pumping system.
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Stiles, Jr., Robert W.; Robol, Ronald B.; Berthelsen, Lars Hoffmann; Harvest, Nils-Ole; Cox, Everett; Steen, Donald; Murphy, Kevin; Hruby, Daniel J.; Westermann-Rasmussen, Peter; Kjaer, Gert, Control algorithm of variable speed pumping system.
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Marioni, Elio, Device for detecting the level of liquid, particularly for submersed pumps.
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Marioni, Elio, Device for sensing the level of liquid, particularly for submersed pumps.
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Robol, Ronald B.; Hruby, Daniel J.; Colvin, Johnathan Steven, Discharge vacuum relief valve for safety vacuum release system.
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West David, Electronic pump switching system.
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Stiles, Jr., Robert W.; Berthelsen, Lars Hoffmann; Westermann-Rasmussen, Peter; Kjaer, Gert; Lungeanu, Florin, Flow control.
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MacDonald, Ronald, High liquid alarm system.
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MacDonald,Ronald, High liquid alarm system.
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Burza, Joseph K., Liquid level detection system with floating RFID tag.
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Gibb, Robert F., Method and apparatus for sensor calibration and adjustable pump time in a dewatering system.
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Gibb, Robert F., Method and apparatus for sensor calibration in a dewatering system.
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Gibb, Robert F., Method and apparatus for sensor calibration in a dewatering system.
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Sim, Harry; Kim, Steve; Shaw, Robert, Method and apparatus for wireless dielectric fluid detection.
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Kidd, Melissa Drechsel; Genaw, William James; Pasche, Micheal Robert; Baase, II, Gary Thomas; Berthelsen, Lars Hoffmann; Fink, Rasmus; Holm, Martin Skov, Method of controlling a pump and motor.
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MacDonald, Ronald, Pump control system for submersible pumps.
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Koehl, Robert M., Pump controller system and method.
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Koehl, Robert M., Pump controller system and method.
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Koehl, Robert M., Pump controller system and method.
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Koehl, Robert M., Pump controller system and method.
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Stiles, Jr., Robert W.; Berthelsen, Lars Hoffmann; Robol, Ronald B.; Yahnker, Christopher; Hruby, Daniel J.; Murphy, Kevin; Runarsson, Einar Kjartan; Hansen, Arne Fink; Lungeanu, Florin; Westermann-Rasmussen, Peter, Pumping system with housing and user interface.
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Stiles, Jr., Robert W.; Berthelsen, Lars Hoffmann; Robol, Ronald B.; Yahnker, Christopher; Runarsson, Elnar Kjartan, Pumping system with power optimization.
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Stiles, Jr., Robert W.; Berthelsen, Lars Hoffmann; Robol, Ronald B.; Yahnker, Christopher R.; Hruby, Daniel J.; Murphy, Kevin; Brown, Edward; MacCallum, David; Dunn, Dennis; Clack, Kenneth; Runarsson, Einar Kjartan; Morando, Alberto, Pumping system with two way communication.
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Stiles, Jr., Robert W.; Berthelsen, Lars Hoffmann, Safety vacuum release system.
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Arnold G. Wyatt ; Robert L. Terry, Solid state liquid level sensor and pump controller.
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Jason Fletcher ; John Zoeller, Submersible pump containing two levels of moisture sensors.
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Gurega,Richard R., Submersible pump controller.
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Gurega Richard R., Submersible pump controller for differentiating fluids.
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MacDonald, Ronald, Submersible water pump having self-contained control circuit.
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Mehlhorn,William L., Switch assembly, electric machine having the switch assembly, and method of controlling the same.
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Mehlhorn,William L., Switch assembly, electric machine having the switch assembly, and method of controlling the same.
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Bourgeois, Andre Emile; DiCocco, Enrico Anthony; Bullard, Rodney Scott; Whipple, Stephen Vincent, Well water depth monitor.
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Bourgeois, Andre Emile; Dicocco, Enrico Anthony; Bullard, Rodney Scott; Whipple, Stephen Vincent, Well water depth monitor.
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A	생활필수품
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[미국특허] Pump control system 원문보기