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특허 상세정보

Vacuum pressure control system

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) F16K-031/42    F16K-047/04   
미국특허분류(USC) 137/488 ; 251/121 ; 137/492.5
출원번호 US-0496624 (2000-02-02)
우선권정보 JP0248495 (1995-09-01)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P.
인용정보 피인용 횟수 : 4  인용 특허 : 14
초록

In a vacuum pressure control system constituted of a vacuum vessel, a vacuum pump sucking gas in the vacuum vessel, a vacuum proportional opening and closing valve disposed on a pipe connecting the vacuum vessel and the vacuum pump, the vacuum proportional opening and closing valve changing its opening to change the vacuum pressure in the vacuum vessel, a pressure sensor to measure the vacuum pressure in the vacuum vessel and a vacuum pressure control device to control the opening of the vacuum proportional opening and closing valve based on the output o...

대표
청구항

[What is claimed is:] [1.]a valve seat having a central flow passage;a valve member having a peripheral portion that is inserted in the central flow passage, said peripheral portion having an upper part, a substantially vertical surface formed on the upper part of the peripheral portion for blocking a flow of gas when in contact with the valve seat, and an inwardly tapered surface formed on the peripheral portion below the vertical surface for permitting the flow of gas when the substantially vertical surface is out of contact with the valve seat, and a ...

이 특허에 인용된 특허 (14)

  1. Curran John R. (180 Ebenezer Rd. Osterville MA 02655). Air flow control apparatus. USP1992105158230.
  2. Fitzgerald William V. (McKinney TX). Diagnostic apparatus and method for fluid control valves. USP1993035197328.
  3. Semaan Anthony J. (Fremont CA) Brenes A. J. (Castro Valley CA). Electropneumatic closed loop servo system for controlling variable conductance regulating valves. USP1992105158108.
  4. Coppola Patrick S. (Schenectady NY) Malone Paul E. (Schenectady NY). Fast opening valve apparatus. USP1986044585205.
  5. Yonnet Claude (Matlock GB3). Fluid supply pressure control method and apparatus. USP1995105460196.
  6. Smith Ian S. R. (Boulder CO). Motor controlled throttling poppet valve. USP1994065318272.
  7. Etheridge Reggie H. (4514 Brittmore Houston TX 77041). Piloted wellhead flow control valve. USP1988104774980.
  8. Frei Willi (Sennwald CHX). Pneumatic drive for switching elements and control elements. USP1983114414882.
  9. Ligh Jone Y. (P.O. Box 420509 Houston TX 77242-0509). Pressure balanced valve spindle. USP1992035094267.
  10. Brown Gregory C. (Minnetonka MN). Smart valve positioner. USP1995075431182.
  11. Jeschke Norbert (Dietzenbach DT). Three-point regulator with feedback. USP1977074037619.
  12. Sowards Brian D. (Mocksville NC) Emilson Frederick H. (Lexington NC). Unloader, and in combination with an air compressor inlet housing. USP1988104778351.
  13. Stubbs George A. (Warrington GB2). Valve and components therefor. USP1984024431159.
  14. Paquet Jean-Marc (Annecy FRX) Sibuet Ren (Annecy FRX). Valve which is opened by reduced pressure. USP1986094613111.