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특허 상세정보

Electro-hydraulic actuator with mechanical servo position feedback

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) F15B-009/10   
미국특허분류(USC) 091/382
출원번호 US-0289886 (2002-11-07)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 8  인용 특허 : 17
초록

A method and apparatus for an electro-hydraulic actuator (1) having mechanical feedback provide closed loop control with a high degree of accuracy. The electro-hydraulic actuator (1) includes a current versus load generator (10), a single-stage servomechanism (20, 21, 22, 23), and a device (24, 25, 40, 41) for providing a mechanical feedback force for offsetting an input force (Fsol) of the current versus load generator (10).

대표
청구항

1. An electro-hydraulic actuator comprising:a single stage servomechanism; a current versus load generator, said current versus load generator being capable of energizing said single stage servomechanism with an input force, said input force controlling said single stage servomechanism to regulate a regulated servo pressure controlled by said electro-hydraulic actuator, wherein said load generator includes a solenoid creating said input force; a control orifice; a flapper valve pivotably connected to said load generator and operatively engaged with said ...

이 특허에 인용된 특허 (17)

  1. Gibbons Kevin D.. Actuator with failfixed zero drift. USP1998045735122.
  2. Cooper Edward J. (Schenectady NY). Apparatus and methods for converting a steam turbine control system from mechanical/hydraulic to electrical/hydraulic co. USP1994095346360.
  3. Vukovich William Joseph ; Koenig Melissa Mei,FRX. Continuously variable transmission and control. USP1999125997431.
  4. Noe William B. (Concord MA). Control system for external combustion engine. USP1976033942327.
  5. Meyer Hal G. (Rockford IL). Electro-hydraulic control system for governors. USP1991055014667.
  6. Basrai, Habil S.; Rajagopal, Ganesh. Electro-hydraulic proportional actuator. USP1984054450753.
  7. Daeschner John (Torrance CA). Electro-hydraulic proportional actuator. USP1989024807517.
  8. Lewis Leon D. (Palos Verdes CA) Wiher Wilfried (Redondo Beach CA) Parker Warde L. (Rancho Palos Verdes CA). Electrohydraulic proportional actuator apparatus. USP1979124177713.
  9. Mard Kenneth C. (Stratford CT) Washburn S. John (Jupiter FL). Fixed position variable frequency pendular-type vibration absorber. USP1982124365770.
  10. Toi Toshio (Kobe JA). Fluid pressure operable servo positioner. USP1977074033233.
  11. Leonard Willie B. (5902 Royalton Houston TX 77036). Fluidic repeater. USP1982064335645.
  12. Lowi ; Jr. Alvin. Positive-displacement-metering, electro-hydraulic fuel injection system. USP1999085938124.
  13. Knutson Dale A. (Oconomowoc WI) Patel Kishor J. (Hales Corners WI). Proportional flow control valve. USP1977034011891.
  14. Hietkamp Albert,NLX. Servo pressure regulator for a gas valve. USP1998045735503.
  15. Tyler Henry P. (South Bend IN). Servo valve control apparatus. USP1976073967533.
  16. Cheung Shek Michael. Servo-actuator with fail safe means. USP1999055899064.
  17. Schendel Robert E. (Kingwood TX) Leinen Chris M. (Houston TX). Split clamp linear solenoid valve positioner. USP1993015179888.

이 특허를 인용한 특허 피인용횟수: 8

  1. Ferren, Bran; Hagen, Jeffrey John; Hyde, Roderick A.; Ishikawa, Muriel Y.; Leuthardt, Eric C.; Rivet, Dennis J.; Wood, Jr., Lowell L.; Wood, Victoria Y. H.. Circulatory monitoring systems and methods. USP2014018636670.
  2. Ferren, Bran; Hagen, Jeffrey John; Hyde, Roderick A.; Ishikawa, Muriel Y.; Leuthardt, Eric C.; Rivet, Dennis J.; Wood, Jr., Lowell L.; Wood, Victoria Y. H.. Circulatory monitoring systems and methods. USP2013038403881.
  3. Ferren, Bran; Hagen, Jeffrey John; Hyde, Roderick A.; Ishikawa, Muriel Y.; Leuthardt, Eric C.; Rivet, Dennis J.; Wood, Jr., Lowell L.; Wood, Victoria Y. H.. Circulatory monitoring systems and methods. USP2012118317776.
  4. Ferren, Bran; Hagen, Jeffrey John; Hyde, Roderick A.; Ishikawa, Muriel Y.; Leuthardt, Eric C.; Rivet, Dennis J.; Wood, Jr., Lowell L.; Wood, Victoria Y. H.. Circulatory monitoring systems and methods. USP2014108870813.
  5. Ferren, Bran; Hyde, Roderick A.; Ishikawa, Muriel Y.; Leuthardt, Eric C.; Rivet, Dennis J.; Wood, Jr., Lowell L.; Wood, Victoria Y. H.. Treatment indications informed by a priori implant information. USP2017089717896.
  6. Ferren, Bran; Hyde, Roderick A.; Ishikawa, Muriel Y.; Leuthardt, Eric C.; Rivet, Dennis J.; Wood, Jr., Lowell L.; Wood, Victoria Y. H.. Treatment indications informed by a priori implant information. USP2013048409132.
  7. Gibbons, Kevin; Marocchini, Francis P.; Leutwiler, Tomas R.. Wash filter with wash velocity control cone. USP2011108029664.
  8. Gibbons, Kevin; Marocchini, Francis P.; Leutwiler, Tomas R.. Wash filter with wash velocity control cone. USP2012118313656.