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특허 상세정보

Automotive air bleed valve for a closed hydraulic system

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) F14D-019/08   
미국특허분류(USC) 137/197; 137/558; 060/453
출원번호 US-0867581 (2009-03-31)
등록번호 US-8439065 (2013-05-14)
국제출원번호 PCT/US2009/038889 (2009-03-31)
§371/§102 date 20100813 (20100813)
국제공개번호 WO2009/124009 (2009-10-08)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Fistek, Thomas G.
인용정보 피인용 횟수 : 2  인용 특허 : 34

An auto bleed valve and method of bleeding a hydraulic system of an aircraft is accomplished by illuminating a plenum of a bleed valve using an LED oriented to illuminate a phototransistor when air is present in the plenum. A comparator circuit is used on an output of the phototransistor such that a predetermined voltage output corresponds to air detected in the plenum. An integrating circuit and a second comparator in series with the first comparator circuit is used to determine when a predetermined time period is met in which air is continuously detect...


1. An automatic bleed valve comprising: a plenum chamber;an air detection system comprising an LED and a photoelectric diode, the LED configured to illuminate the photoelectric diode when air is detected in the plenum chamber;a first comparator circuit which takes in the output voltage of the photoelectric diode, the first comparator circuit provides a generally constant output voltage when the output voltage of the photoelectric diode corresponds to a voltage signaling that air is detected in the plenum chamber;an integrator circuit in series with the f...

이 특허에 인용된 특허 (34)

  1. Kehl Georg (Stuttgart DEX) Siegel Heinz (Stuttgart DEX). ABS damper chamber and bleed valve. USP1994065324101.
  2. Massie Harold Lee (Minnetonka MN) Cosentino Louis C. (Wayzata MN). Air leak detector. USP1976023935876.
  3. Daniell Anthony L. (7355 Nita Ave. Canoga Park CA 91303) Alger Patrick J. (P.O. Box 8674 Northridge CA 91327). Apparatus and method for monitoring a steeping beverage and for indicating when a desired beverage strength is attained. USP1997105680108.
  4. Lee Kin Bong ; Lee Steven K.. Apparatus for bleeding and refilling hydraulic brake system. USP1999105964326.
  5. Archung Ralph (Issaquah WA) Loetz George C. (Seattle WA). Apparatus for centralized pressurization and depressurization of aircraft hydraulic reservoirs. USP1987054664155.
  6. Owens Daniel Richard,GBX. Apparatus for measuring characteristics of a liquid. USP1999015864140.
  7. Petty Jon A. (18834 N. 45th Ave. Glendale AZ 85308). Arrangement and method for removal of air from a hydraulic system. USP1997115687566.
  8. Stein Joachim,DEX. Automatic air-vent valve for hydraulic systems. USP2000046047720.
  9. Sweet David H. (Tequesta FL) Evans Charles W. (Norfolk CT). Automatic turbine engine bleed valve control for enhanced fuel management. USP1994055313778.
  10. De Martelaere David L. (Troy MI) Bogard William E. (Sterling Heights MI). Brake bleeder adapter. USP1980054201056.
  11. Buckley, James A.; Walterman, Scott A.; Bigsby, Brian. Brake system having boosted hydraulic accumulator. USP2005096942075.
  12. Smith,Frederick Riley. Clutch bleeder tool apparatus and method. USP2006037013642.
  13. Dixen Carl C. (Horuphav DKX). Control device for at least one hydraulically operated load. USP1987024642984.
  14. Snook Martin (Harrow GB2) Rideout James M. (Sanderstead GB2) Renshaw Alan (Chesham GB2). Device for analyzing chemical substance. USP1986064594533.
  15. Benner ; Jr. James D. (Sugarland TX). Drop detecting system which operates under different ambient light conditions. USP1988014720636.
  16. Kubik Philip A. (1527 Lockridge Bloomfield Hills MI 48013). Dual pump traverse and feed system. USP1991095048292.
  17. Staff Paul E. (Suffolk GB2) Button David (Suffolk GB2) Pratt John D. (Suffolk GB2) Barnard Dominic P. E. (Oxon GB2). Flow contamination monitor. USP1997045619333.
  18. Sakata, Yasunori. Hydraulic brake apparatus for a vehicle. USP2003066578932.
  19. Oien Gene (Loves Park IL). Hydraulic brake bleeder apparatus. USP1996035497864.
  20. Leiber Heinz (Oxerriexingen) Steiner Manfred (Stuttgart) Klinkner Walter (Stuttgart DEX). Hydraulic dual-circuit brake system. USP1993045201573.
  21. Sturman Oded E. ; Grill Benjamin. Isolated proportional valve. USP2001056237617.
  22. Hoss Robert J. (Plano TX). Meter rotor rotation optical sensor. USP1982044327362.
  23. Hardy Robert H. S. (Regina CAX) Beattie Jay E. (Indian Head CAX). Method and apparatus for sensing current in high voltage conductors. USP1984094471355.
  24. Baechle Martin,DEX ; Schmitt Stefan A.,DEX. Method of eliminating the inclusion of gas bubbles when filling of brake fluid into a hydraulic automotive vehicle brake system. USP2001016179392.
  25. Schmidt,Guenther. Method used for bleeding a hydraulic vehicle brake system. USP2008037344206.
  26. Harwick Warren J. (Rochester MI) Sommer Holger T. (Merlin OR) Girvin Kenneth L. (Grants Pass OR). Monitoring of fluid contamination level wherein the light energy is focused on the fluid passage means. USP1995085438420.
  27. Rey Bertrand (Blagnac FRX) Saint-Amans Claude (Blagnac FRX). Process for the replacement of a hydraulic fluid contained in a control circuit such as an aircraft circuit. USP1997065641003.
  28. Gris, Philippe. Regulated level accumulator for liquid under high pressure. USP1991085036661.
  29. Modlin,Douglas N.; Edwards,Glenn R.; Owicki,John C.; Taylor,Michael T.; Marquiss,Samuel A.. Sample analysis systems. USP2006016982431.
  30. Bernal, Brian Andrew; Fischette, Robert Gerard; Johnson, Kirk Rodney; Marman, Douglas Henry. Self-diagnostic smoke detector. USP2004066756906.
  31. Hasch Gnter (Heilbroon DEX) Moser Helmut (Heilbroon DEX). Sensor system with adjustment for ambient conditions. USP1993075225669.
  32. Knothe George T. (Tulsa OK) Mayfield Robert A. (Tulsa OK). Shut-off cylinder for a supply accumulator of a hydraulic brake system. USP1984054448458.
  33. Klein Hans-Christof (Hattersheim DEX) Lohberg Peter (Friedrichsdorf DEX). Thermally checking the state or the condition of a hydraulic fluid. USP1989094869596.
  34. Tornay,Paul G.. Water leak detection and prevention systems and methods. USP2007127306008.

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