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Level detector

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • G01F-023/26
  • G01R-027/26
출원번호 US-0328571 (1994-10-24)
우선권정보 JP-0081982 (1992-04-03); JP-0081983 (1992-04-03)
발명자 / 주소
  • Yamaguchi Chikazi (Handa JPX)
출원인 / 주소
  • Toyota Tsusho Corporation (Nagoya JPX 03) Beam Electronics Company Limited (Handa JPX 03) Toyotsu S.K. Company Limited (Ichinomiya JPX 13a part interest )
인용정보 피인용 횟수 : 27  인용 특허 : 8

초록

A level detector includes a level detecting capacitor, an oscillating circuit, and an amplifying circuit. The level detecting capacitor includes a pair of continuously extended electrodes separated by a predetermined distance and disposed at a predetermined position in a container adapted for accomm

대표청구항

A level detector, comprising: a level detecting capacitor for placement in a container of dielectric fluid wherein the level of the dielectric fluid is to be detected, said level detecting capacitor including a pair of substantially coextensive electrodes, the electrodes being separated by a predete

이 특허에 인용된 특허 (8)

  1. Maier Lawrence C. (Middlebury VT), Apparatus for the ratiometric measurement of a quantity of liquid in a tank.
  2. Worthington Ralph T. (4733 Mt. St. Helens Ct. San Diego CA 92117), Capacitance liquid level sensing and touch control system.
  3. Fathauer, George H.; Hood, Charles F., Capacitance-type material level indicator.
  4. Atherton Kim W. (Kirkland WA) Clow Charles R. (Bothell WA) Mawet Patrick H. (Everett WA), Dielectric liquid level sensor and method.
  5. Alvarez Jose A. (917 Cross Ave. Elizabeth NJ 07208), Impedance measuring system.
  6. Paglione Robert W. (Mercer NJ), Method and apparatus for detecting liquid composition and actual liquid level.
  7. Eichberger Robert T. (Mt. Clemens MI) Hewelt Scott M. (Marine City MI), System for indicating a condition of material.
  8. Tuma John E. (Houston TX) Williams Barry N. (Rosharan TX) Bogle Tommy G. (Houston TX), Water sensor that detects tanks or vessel leakage.

이 특허를 인용한 특허 (27)

  1. Pomar Longedo Pere,ESX ; Pons Munill Xavier,ESX ; Twose Valls Ivan,ESX ; Alonso Riera Enric,ESX ; Restrepo Guerrero Carlos,ESX ; Perez Puigdomenech Francesc,ESX, Apparatus for performing laboratory tests automatically.
  2. Richard A. Livingston, Balanced charge pump capacitive material sensor.
  3. Byatt Anghony,CHX ; Christen Thomas,CHX ; Kleiner Thomas,CHX ; Matter Daniel,CHX ; Ruegg Walter,CHX, Capacitive liquid level sensor with integrated pollutant film detection.
  4. Stanley, James Gregory, Conductive liquid property measurement using multiple charge transfer times.
  5. Kenneth A. Degrave, Device which measures oil level and dielectric strength with a capacitance based sensor using a ratiometric algorithm.
  6. Farr, Isaac; Cai, Edward Z.; Walker, Ray Allen; Shivji, Shane, Fluid detection system.
  7. Lipscomb, James H.; Jurik, Anna; Katz, Bernard; Keating, Michael J.; Klengler, Stone; Kotlarik, John J.; Wroblewski, Mieczyslaw, Fluid dispense verification system.
  8. Lipscomb, James H.; Jurik, Larry; Katz, Bernard; Keating, Michael J.; Klengler, Stone; Kotlarik, John J.; Wroblewski, Mieczyslaw, Fluid transfer system.
  9. Hee-guk Kwak KR; Hyong-gu Lee KR, Liquid level detector and liquid level measuring apparatus of printer adopting the same.
  10. Hetherington,Jack; Hetherington,Michael, Low-cost linear and liquid position transducers.
  11. Marszalek, Gary A., Method and apparatus for stabilizing parasitic error capacitance in oil quality sensors.
  12. Coudray Pascal,FRX ; Froger Marie-Helene,FRX, Method and device for determining the quantity of product present in a reservoir, a product reservoir and a device for processing electrical signals intended for such a determination device.
  13. Florin, Martin; Schmidt, Werner, Method and device for measuring levels.
  14. Lipscomb, James H.; Jurik, Anna; Katz, Bernard; Keating, Michael J.; Klengler, Stone; Kotlarik, John J.; Wroblewski, Mieczyslaw, Method of detecting a fluid surface.
  15. Lipscomb, James H.; Jurik, Larry; Katz, Bernard; Keating, Michael J.; Klengler, Stone; Kotlarik, John J.; Wroblewski, Mieczyslaw, Method of detecting fluid flow through a conduit.
  16. Lipscomb, James H.; Jurik, Larry; Katz, Bernard; Keating, Michael J.; Klengler, Stone; Kotlarik, John J.; Wroblewski, Mieczyslaw, Method of detecting fluid flow through a conduit.
  17. Farr, Isaac; Shivji, Shane, Printing device having a printing fluid detection system.
  18. Farr,Isaac, Printing device having a printing fluid detector.
  19. Farr,Isaac; Shivji,Shane, Printing device having a printing fluid detector.
  20. Calabrese, Ronald V., Self-calibrating liquid level transmitter.
  21. Calabrese,Ronald V., Self-calibrating liquid level transmitter.
  22. Calabrese,Ronald V., Self-calibrating liquid level transmitter.
  23. Cargol,Timothy L.; Cooke,Chathan M., System and method for measuring the dielectric strength of a fluid.
  24. McNichol Randal S., System for measuring capacitance.
  25. Sargent John S. ; Sargent Frank T., Volume charge density measuring system.
  26. Sargent, John S.; Sargent, Frank T., Volume charge density measuring system.
  27. Sargent, John S.; Sargent, Frank T., Volume charge density measuring system.
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