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특허 상세정보

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System and method for maintaining a liquid level

특허상세정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) F04B-049/00    F25D-017/02    G08B-021/00   
미국특허분류(USC) 417/36 ; 62/188 ; 137/392 ; 340/244C
출원번호 US-0619901 (1975-10-06)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 62  인용 특허 : 0
초록
▼

The specification discloses a technique for controlling a pump to maintain a body of liquid below a maximum liquid level. A low voltage high frequency signal is applied to a conductive first probe which extends to a desired maximum liquid level. The high frequency signal is also applied to an electronic detector and switching circuit in order to maintain the switching circuit in a first state when the liquid level does not contact the first probe. The effect of the application of the high frequency signal to the switching circuit is reduced when the liqu...

대표
청구항
▼

A liquid level control system for an air conditioner comprising: first and second conductive probes suspended above a body of liquid and extending below a maximum desired level, a third conductive probe suspended above the body of liquid and extending downwardly to said maximum desired level, an oscillator normally coupled to said first and third probes for generating a high frequency signal, electronic switching means coupled to said probes and said oscillator, said switching means being switched to a first state in response to said high frequency signa...

이 특허를 인용한 특허 피인용횟수: 62

  1. Stiles, Jr., Robert W.; Berthelsen, Lars Hoffmann; Westermann-Rasmussen, Peter; Kjaer, Gert; Lungeanu, Florin. Anti-entrapment and anti-dead head function. USP2017019551344.
  2. Kates, Lawrence. Authentication codes for building/area code address. USP2011027893812.
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  7. Ward, Charles Barry. Condensate pump. USP2014028651824.
  8. 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. USP2017039605680.
  9. 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. USP2016089404500.
  10. Lively, Olin A.. Control circuitry for water level control of pools. USP1983044380091.
  11. Kates, Lawrence. Controlled power-efficient operation of wireless communication devices. USP2015119183733.
  12. Kates, Lawrence. Controlled power-efficient operation of wireless communication devices. USP2016109474023.
  13. Kates, Lawrence. Controlled power-efficient operation of wireless communication devices. USP2016089412260.
  14. Robol, Ronald B.; Hruby, Daniel J.; Colvin, Johnathan Steven. Discharge vacuum relief valve for safety vacuum release system. USP2017029568005.
  15. Kates, Lawrence. Environmental sensing systems having independent notifications across multiple thresholds. USP2015028963727.
  16. Kates, Lawrence. Environmental sensing systems having independent notifications across multiple thresholds. USP2015049007225.
  17. Stiles, Jr., Robert W.; Berthelsen, Lars Hoffmann; Westermann-Rasmussen, Peter; Kjaer, Gert; Lungeanu, Florin. Flow control. USP2017109777733.
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  22. Kates, Lawrence. Method and apparatus for detecting severity of water leaks. USP2009077561057.
  23. Kates, Lawrence. Method and apparatus for detecting water leaks. USP2009097583198.
  24. 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. USP2017019556874.
  25. Kates, Lawrence. Method of measuring signal strength in a wireless sensor system. USP2011027893827.
  26. Morrison Daniel R. (Key Biscayne FL) Pickell William C. (Key Biscayne FL) Massey William S. (Silver Spring MD). Overflow and leakage detection system for an air conditioning unit. USP1990014896052.
  27. Blichmann, John R.; Kloeblen, Scott A.. Overflow prevention mechanism for liquid transfer systems. USP2003076584997.
  28. Kates, Lawrence. Portable monitoring unit. USP2009057528711.
  29. Koehl, Robert M.. Pump controller system and method. USP20190310241524.
  30. Koehl, Robert M.. Pump controller system and method. USP2016079399992.
  31. Koehl, Robert M.. Pump controller system and method. USP2016059328727.
  32. Koehl, Robert M.. Pump controller system and method. USP2016069371829.
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  34. Stiles, Jr., Robert W.; Berthelsen, Lars Hoffmann; Robol, Ronald B.; Yahnker, Christopher; Runarsson, Elnar Kjartan. Pumping system with power optimization. USP2018049932984.
  35. 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. USP20190310240606.
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  40. Kates, Lawrence. Sensor device measurements adaptive to HVAC activity. USP2015038981950.
  41. Kates, Lawrence. Signal strength-based routing of network traffic in a wireless communication system. USP2016039286787.
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  45. Mehlhorn,William L.. Switch assembly, electric machine having the switch assembly, and method of controlling the same. USP2007027183741.
  46. Mehlhorn,William L.. Switch assembly, electric machine having the switch assembly, and method of controlling the same. USP2008097427844.
  47. Mehlhorn,William L.. Switch assembly, electric machine having the switch assembly, and method of controlling the same. USP2006057042192.
  48. Kates, Lawrence. System and method for high-sensitivity sensor. USP2015028963726.
  49. Kates, Lawrence. System and method for high-sensitivity sensor. USP2015028963728.
  50. Kates, Lawrence. System and method for high-sensitivity sensor. USP2015049019110.
  51. Kates, Lawrence. System and method for high-sensitivity sensor. USP2009117623028.
  52. Kates, Lawrence. System and method for utility metering and leak detection. USP2010037669461.
  53. Kates,Lawrence. System and method for utility metering and leak detection. USP2008087412876.
  54. Gilbert Paul A. ; Jobe Terry V. ; Morrow Johnny Lee ; McEwen Thomas Vertis. System for monitoring and controlling the level of a liquid in a closed container. USP2000086095178.
  55. Kates, Lawrence. Testing for interference within a wireless sensor system. USP2011077982602.
  56. Kates, Lawrence. Traffic collision avoidance in wireless communication systems. USP2016039286788.
  57. Murr James ; Ellison Jack Edwin. Water distribution and return control system for evaporative cooling pad installation. USP1999105966953.
  58. Kates, Lawrence. Wireless sensor unit communication triggering and management. USP2017089723559.
  59. Kates, Lawrence. Wireless sensor unit communication triggering and management. USP2016049318015.
  60. Kates, Lawrence. Wireless transceiver. USP2016059357490.
  61. Kates, Lawrence. Wireless transceiver. USP2018019860839.
  62. Kates, Lawrence. Wireless transceiver. USP2010107817031.

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