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Floating coil servo valve

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) F15B-009/03    F15B-013/044   
미국특허분류(USC) 91/361 ; 91/433 ; 91/459 ; 137/62565
출원번호 US-0432978 (1989-11-06)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 27  인용 특허 : 7
초록

An electrohydraulic servo valve employing a linear force motor having a floating coil and armature driven by a high frequency excitation signal modulated to change its average DC component. A servo loop controller modulates the excitation signal in response to feedback signals from the servo valve or a hydraulic actuator controlled by the servo valve.

대표
청구항
▼

A servo valve, comprising a magnet assembly defining an air gap containing a magnetic flux; a coil support carrying an electrical winding in said air gap; disposed a spool valve composing a spool slidably disposed in a spool valve housing; operator means connected between said spool and said coil support to operate said spool valve by sliding said spool in said spool housing, said coil support, operator means and spool being free floating with respect to said magnet assembly; electrical excitation means, connected to said electrical winding, for applying...

이 특허에 인용된 특허 (7)

  1. Ichiryu, Ken; Watanabe, Haruo; Yamaguchi, Takashi. Direct-acting servo valve. USP1985104544129.
  2. Takagi Shigeyuki (Gifu JPX). Dynamic characteristic compensating device for electrical hydraulic servo actuator. USP1989044817498.
  3. McCormick Joseph F. (Pawling NY). Electrical linear force motor for servo controls, fluid valves, and the like. USP1977084040445.
  4. Hammett Geoffrey G. (Duluth GA). Linear servoactuator with integrated transformer position sensor. USP1986124628499.
  5. Glomeau J. Robert (Dover MA) Keith Gareth A. (Sherborn MA). Pneumatic actuator apparatus. USP1988054741247.
  6. Leemhuis Richard S. (Troy MI). Power transmission. USP1987124714005.
  7. Ichiryu Ken (Mito JPX) Watanabe Haruo (Ibaraki JPX) Nemoto Masami (Ibaraki JPX). Servovalve apparatus. USP1984084464978.

이 특허를 인용한 특허 피인용횟수: 27

  1. Christenson Ronald E. ; Brandt Calvin ; Bartlett William P.. Air logic system for side loader. USP1998065768972.
  2. Trikha Arun K.. Aircraft servovalve current rate limiter. USP1999126003811.
  3. Hayashi, Yoshinori; Komatsu, Akihiko. Apparatus for detecting displacement of electromagnetic actuator. USP2014078773114.
  4. Stoll Kurt,DEX ; Gommel Gerhard,DEX ; Arbter Jurgen,DEX ; Schwenzer Reinhard,DEX. Apparatus for the damped positioning of a piston. USP2000076085632.
  5. Menard Christian (Villennes S/Seine FRX). Control device for a hydraulic slide valve. USP1997035611518.
  6. Dietz Hans P. (Peoria IL). Control system for a hydraulic cylinder and method. USP1997095666806.
  7. Cook, Daniel S.. Dead band reduction in electronically controlled valves. USP2011088001993.
  8. Coakley, Kim L.; Bessinger, Russell L.; Blake, Rex J.. Digitally controlled direct drive valve and system and method for manufacturing the same. USP2004096789558.
  9. Hutchison, Eric A.; Lukich, Michael S.. Electromagnetically actuated spool valve. USP199306H001191.
  10. Borcea Nicky ; Ionescu Alexandru D.. Electromechanical servovalve. USP1999105960831.
  11. Sagaser Thomas M. ; Brandt Kenneth A. ; Jacobson Scott B. ; Brock Knute K.. Electronic controls on a skid steer loader. USP1999075924516.
  12. Cook, Daniel C.; Carter, Blake D.; Howe, Roger Edwin. Equalization of pressure in an electronically controlled valve. USP2010127845370.
  13. Gill A. Pratt ; David W. Robinson. Force-controlled hydro-elastic actuator. USP2002126494039.
  14. Sagaser Thomas M. ; Brandt Kenneth A. ; Jacobson Scott B. ; Brock Knute K.. Hand/foot selector for electronic controls on a skid steer loader. USP2001096289783.
  15. Yo, Seikai; Fujiwara, Nobuhiro; Matsumoto, Daisuke. High speed driving method and apparatus of pressure cylinder. USP2004106799501.
  16. Yo,Seikai; Miyachi,Hiroshi; Fujiwara,Nobuhiro; Matsumoto,Daisuke. High-speed driving method of pressure cylinder. USP2006067062832.
  17. Trotter, Victor D.. Hydraulic control system. USP2013028365762.
  18. Peterson, Arnold. Hydraulic control system and method. USP2012028109197.
  19. Peterson, Arnold. Hydraulic control system and method. USP2014078763513.
  20. Smith Brian. Inner-loop valve spool positioning control apparatus. USP1999035884894.
  21. Tranovich Stephen J. (Valencia CA). Integrated compliance servovalve. USP1996105568022.
  22. Schottler,Joseph J.; Stafney,John C.. Method of determining average current in a PWM drive. USP2008107440821.
  23. Miller, Stanley F.; Smirl, Paul; Tondolo, Flavio. Pneumatic actuator circuit. USP2004056732629.
  24. James C. Potter ; Larry P. Bennett. Self-calibrating system and method for controlling a hydraulically operated device. USP2002016341552.
  25. Koehler, Douglas W.; Schwab, Michael R.; Zhang, Jiao. System and method of pressure compensation for electro hydraulic control systems. USP2003086609369.
  26. Kolbenschlag, Stefan. Transducer of an electrical input signal into pneumatic output signals. USP2010097802585.
  27. LaBenz, Joel E.; Marshall, Dori M.; Roberts, Kenneth A.; Coronel, Osman J.. Valve actuator assembly. USP2009057537022.

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