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특허 상세정보

Electro-hydraulic proportional actuator

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) F15B-021/02    F15B-009/03    F15B-009/09   
미국특허분류(USC) 091/035; 091/363.R; 091/446; 091/465
출원번호 US-0149065 (1980-05-12)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Roethel, John J.Sadler, Clifford L.
인용정보 피인용 횟수 : 16  인용 특허 : 0
초록

An electro-hydraulic proportional actuator in which the actuator piston position is hydraulically controlled by fluid flow through solenoid valves operable by an electronic control system. An operator control provides an input voltage representing a desired piston position and a transducer generates a voltage representing the actual piston position. The difference between the input and output voltages generates a difference or error signal that is fed into a feedback system including a sample-and-hold circuit. A clock logic system is provided for transmi...

대표
청구항

1. An electro-hydraulic proportional actuator, comprising: an actuator assembly having a double-acting, linearly-movable piston contained in a cylinder having a chamber at each end; a pair of three-way solenoid valves each of which has an actuator port, an inlet port and an outlet port; each end chamber of the actuator assembly cylinder being coupled to the actuator port of one of the valves, and each valve inlet port being coupled through a check valve to a fluid pressure source and the return ports being coupled to each other with the fluid flow ...

이 특허를 인용한 특허 피인용횟수: 16

  1. Moler,Jeff; Alexy,Mike; Oudshoorn,Mark. Accurate fluid operated cylinder positioning system. USP2006047021191.
  2. Bunyard,Adam. Actuator control device. USP2006117131631.
  3. Moler, Jeff; Bugel, John; Thornhill, Keith A; Oudshoorn, Mark P. Apparatus and process for optimizing work from a smart material actuator product. USP2009077564171.
  4. Moler,Jeff; Bugel,John; Thornhill,Keith A.; Oudshoorn,Mark P.. Apparatus and process for optimizing work from a smart material actuator product. USP2008057368856.
  5. Myles J. Scott (Berkley MI). Computer controlled hydraulic drive for index table. USP1989024807338.
  6. Demers, Dennis G.. Electro-hydraulic actuator with mechanical servo position feedback. USP2005106955113.
  7. Feuser Alfred (Lohr-Rodenbach DEX). Hydraulic driving device. USP1990024901624.
  8. Marica, Adrian. Hydraulically actuated reciprocating pump. USP2013058449265.
  9. Bugel,John; Moler,Jeff; Oudshoorn,Mark P.. Multi-valve fluid operated cylinder positioning system. USP2008047353743.
  10. Moler,Jeff; Woozley,Mark; Bugel,John. Piezo-electric actuated multi-valve manifold. USP2006057040349.
  11. Marica, Adrian. Pulsation dampening system for a reciprocating pump. USP2015099121397.
  12. Roger A. Webel. Slow start control for a hydraulic hammer. USP2002126491114.
  13. Gibbons, Kevin; Marocchini, Francis P.; Leutwiler, Tomas R.. Wash filter with wash velocity control cone. USP2011108029664.
  14. Gibbons, Kevin; Marocchini, Francis P.; Leutwiler, Tomas R.. Wash filter with wash velocity control cone. USP2012118313656.
  15. Sugita Katsuhiko (Kanazawa JPX). Weft insertion control method and device for carrying out the same. USP1987104702285.
  16. Bohusch Glen D. (Erie PA) Hall George D. (Erie PA) Shostek Edward M. (Fairview PA). Wheeled table floor lock apparatus. USP1989054833972.