$\require{mediawiki-texvc}$
  • 검색어에 아래의 연산자를 사용하시면 더 정확한 검색결과를 얻을 수 있습니다.
  • 검색연산자
검색연산자 기능 검색시 예
() 우선순위가 가장 높은 연산자 예1) (나노 (기계 | machine))
공백 두 개의 검색어(식)을 모두 포함하고 있는 문서 검색 예1) (나노 기계)
예2) 나노 장영실
| 두 개의 검색어(식) 중 하나 이상 포함하고 있는 문서 검색 예1) (줄기세포 | 면역)
예2) 줄기세포 | 장영실
! NOT 이후에 있는 검색어가 포함된 문서는 제외 예1) (황금 !백금)
예2) !image
* 검색어의 *란에 0개 이상의 임의의 문자가 포함된 문서 검색 예) semi*
"" 따옴표 내의 구문과 완전히 일치하는 문서만 검색 예) "Transform and Quantization"

특허 상세정보

Proportional flow control valve

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) F15B-009/03   
미국특허분류(USC) 137/62562 ; 137/62563 ; 137/62564 ; 91/382
출원번호 US-0602443 (1975-08-06)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 32  인용 특허 : 0
초록

A proportional flow control valve comprises a directional control valve having a valve spool, a servo actuator or servo means for operating said directional control valve, and manual override means for operating the valve spool. The servo means comprises a movable ram or piston for moving the valve spool to thereby operate the directional control valve and the ram has a pair of equally sized piston areas connected thereto. The servo actuator also comprises a pilot valve having a null position and is selectively operable to apply fluid alternately to eith...

대표
청구항

In a servo means: a piston movable in one direction or another from a null position to perform a function; first and second equally sized piston areas connected to said piston; a selectively operable pilot valve comprising first and second adjustable orifice means each having a null position and other selective positions for applying fluid pressure to said first and second piston areas, respectively, to move said piston in said one direction or another, respectively, the extent of piston movement being proportional to the amount of fluid applied; feedbac...

이 특허를 인용한 특허 피인용횟수: 32

  1. Esseniyi Alexander J. (Boardman OH). Air shift conversion apparatus for manual valves. USP1986044585024.
  2. Fry, Lawrence J.; Anderson, Joshua B.. Control valve assembly for load carrying vehicles. USP2015099120492.
  3. Fry, Lawrence J.; Lehmann, Joseph W.; Haskin, Michael P.; Peterson, Gregory W.. Control valve assembly for load carrying vehicles. USP2012098267120.
  4. Fry, Lawrence J.; Lehmann, Joseph W.; Haskin, Michael P.; Peterson, Gregory W.. Control valve assembly for load carrying vehicles. USP2011077980269.
  5. Louis C. Harms. Control valve with mechanical feedback and method for controlling fluid flow. USP2002116481463.
  6. Patel,Kishor J.. Digitally controlled modular valve system. USP2006016990999.
  7. Post, Timothy A.. Electrically operated hydraulic actuator with force feedback position sensing. USP2003106637461.
  8. Demers, Dennis G.. Electro-hydraulic actuator with mechanical servo position feedback. USP2005106955113.
  9. Schulze Eckehart,DEX. Electrohydraulic control valve arrangement. USP2000036039077.
  10. Knutson Dale (Pewaukee WI). Electrohydraulic proportional valve. USP1981094290447.
  11. Barber, Dennis Ray. Electrohydraulic valve having dual-action right-angle pilot actuator. USP2018039915368.
  12. Patel Kishor (Camilla WI). Fail-to-neutral module. USP1980024186909.
  13. Bennett Milton C. (Moline IL). Float positioning assembly for pilot operated valve. USP1984104479514.
  14. Johnson ; Leonard L.. Fluid control system. USP1978054089388.
  15. Wilke Raud A. (Brookfield WI) Paik Michael (Waukesha WI). Hydraulic control valve with manual override. USP1986124627468.
  16. Holmes William K. (Delafield WI). Manual override control handle selectively engageable with the valve spool of a servo valve. USP1987014633977.
  17. Barnes, Michael Stanley; Artis, Evan Kyle; Honkalse, Nachiket Pandurang. Manual override device for a twin spool valve. USP2014128905072.
  18. Reynolds, Dennis L.; Slattery, Brian. Oil exchange in hydraulically operated and electro-hydraulically operated hydraulic valves. USP20181010100849.
  19. Barber,Dennis R.. Position feedback pilot valve actuator for a spool control valve. USP2008097422033.
  20. Perineau Jean (Fresnes FRX). Power steering for motor vehicles. USP1983014369694.
  21. Thompson, Kenneth E.. Proportional control pneumatic cylinder. USP2012108297586.
  22. Weimer James C. (Bethlehem PA) Locks William S. (Bethlehem PA) Wilson Edwin B. (Quakertown PA) Miller Francis G. (Bethlehem PA). Remote control system for mining machines. USP1980034192551.
  23. Currey Stephen B.. Servovalve employing a rotatable feedback linkage. USP1998125848612.
  24. Huynh, Tam C.; French, Nathan H.. Spool-type manual valve with position-adjustable lever. USP2009047516758.
  25. Anderson Gerald C. (Oconomowoc WI) Frank Kenneth F. (West Bend WI). Three-way proportional valve. USP1986024569273.
  26. Olson John R. (Oconomowoc WI). Tilting cam, rotating barrel pump. USP1983034375942.
  27. Strobel, Lee Richard. Valve assembly having dual functionality for directional control of a piston on a fluid actuated device. USP20190210202987.
  28. Barber, Dennis Ray; Beschorner, Matthew J.. Valve having opposing right-angle actuators. USP2018029897228.
  29. Barber, Dennis Ray. Valve having right-angle proportional and directional pilot actuators. USP2017109803661.
  30. Stoever Guy T. (Rock Island IL) Swaim David W. (Coal Valley IL). Valve unit. USP1988014716933.
  31. Gibbons, Kevin; Marocchini, Francis P.; Leutwiler, Tomas R.. Wash filter with wash velocity control cone. USP2011108029664.
  32. Gibbons, Kevin; Marocchini, Francis P.; Leutwiler, Tomas R.. Wash filter with wash velocity control cone. USP2012118313656.