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특허 상세정보

Servo-actuator with fail safe means

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) F16D-031/02   
미국특허분류(USC) 60/406 ; 91/363A ; 91/387 ; 91/461
출원번호 US-0948809 (1997-10-09)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Desmond, Esq.
인용정보 피인용 횟수 : 17  인용 특허 : 8

The present invention provides a servo-actuator capable of operating in both the Fail Safe and Fail Operate modes. In the Fail Safe mode, a pretensioned spring member moves a jet pipe in the servo-valve to cause said actuator rod to move in a first direction upon loss of electric power. A mechanical feedback means coupled to said spring member and said actuator rod opposes the force applied by the spring so that when a force equilibrium is reached the actuator rod will be at a predetermined position.


[ What is claimed is:] [1.] A servo-actuator with Fail Safe means comprising:an actuator having a rod for coupling to a member requiring actuation, said rod being capable of movement between a retracted first position and a second position;an electronic control unit;a servo-valve comprising a torque motor, a jet pipe, a spool valve, and a first plurality of conduits, said first plurality of conduits providing fluid communication between said jet pipe and said spool valve;said torque motor operatively attached to said jet pipe and said electronic control ...

이 특허를 인용한 특허 피인용횟수: 17

  1. Younkin,James R.. Apparatus and method for servo control of an aircraft. USP2006057044024.
  2. Bunn, Andrew D.; Horner, Darrell W.; Arthurs, Timothy R.. Cabin pressure outflow control valve having non-linear flow control characteristics. USP2005116962324.
  3. Sandhu, Sewa S.; Kehl, Kenyon. Cable assembly and air outflow valve incorporating the same. USP2004086783114.
  4. Jean-Philippe Vaslin FR; Alain Roy FR. Displacement sensors for servo-control actuators. USP2002076417640.
  5. Demers, Dennis G.. Electro-hydraulic actuator with mechanical servo position feedback. USP2005106955113.
  6. Bunn, Andrew D.; Horner, Darrell W.; Arthurs, Timothy R.. Fully integrated aircraft cabin pressure control system valve. USP2005096945278.
  7. Mahoney, Timothy D.; Jones, David D.. Method for controlling fuel flow to a gas turbine engine. USP2003126655151.
  8. Ozzello, Guylain. Method of detecting failure of a servo-valve, and a servo-valve applying the method. USP2018029897116.
  9. Malhotra,Praveen K.; Senseny,Paul E.; Braga,Antonio Carlos M.; Allard,Roger L.. Method of testing seismic braces. USP2006117131238.
  10. Woessner, George T.. Missile thrust system and valve with refractory piston cylinder. USP2005056895991.
  11. Zhao, Jie. Modularized airplane structures and methods. USP2012098256714.
  12. Lu,Jyh Woei J.; Tervo,John N.; Rapoport,William R.; Benson,Dwayne M.; Gualtieri,Devlin M.. Optical sensor method, system and apparatus. USP2006057038192.
  13. Miller, Stanley F.; Smirl, Paul; Tondolo, Flavio. Pneumatic actuator circuit. USP2004056732629.
  14. Mahoney, Timothy D.; Jones, David D.. System for controlling fuel flow to gas turbine engine. USP2004066751942.
  15. Woessner, George T.; Abel, Stephen G.; Baker, Mark H.; Alexander, Dennis M.. Vehicle, lightweight pneumatic pilot valve and related systems therefor. USP2005106951317.
  16. Gibbons, Kevin; Marocchini, Francis P.; Leutwiler, Tomas R.. Wash filter with wash velocity control cone. USP2011108029664.
  17. Gibbons, Kevin; Marocchini, Francis P.; Leutwiler, Tomas R.. Wash filter with wash velocity control cone. USP2012118313656.