(19)
(11) EP 0 393 800 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
07.11.1990 Bulletin 1990/45

(43) Date of publication A2:
24.10.1990 Bulletin 1990/43

(21) Application number: 90201568.4

(22) Date of filing: 16.03.1989
(51) International Patent Classification (IPC)5: F04B 21/02
(84) Designated Contracting States:
CH DE FR GB IT LI SE

(30) Priority: 23.03.1988 JP 68882/88
30.03.1988 JP 77076/88
26.04.1988 JP 103232/88

(62) Application number of the earlier application in accordance with Art. 76 EPC:
89302606.2 / 0343773

(71) Applicants:
  • KABUSHIKI KAISHA LITTLE ROCK
    Chiba-shi Chiba-pref. (JP)
  • Koiwa, Yoshinobu
    Chiba-shi Chiba-pref. (JP)
  • KELBIN CO., LTD.
    Tokyo (JP)
  • Fujimori, Shuichi
    Fujisawa-shi Kanagawa-pref. (JP)

(72) Inventor:
  • Koiwa, Yoshinobu
    Chiba-shi, Chiba-pref. (JP)

(74) Representative: Newstead, Michael John et al
Page Hargrave Temple Gate House Temple Gate
Bristol BS1 6PL
Bristol BS1 6PL (GB)


(56) References cited: : 
   
       


    (54) Valve device


    (57) A valve device comprises a seat (84) in the face of which are formed valve seats (83) spaced at regular intervals around the edge, each shaped into a concave form that corresponds to part of a spherical surface; a multiplicity of fluid passages (88) formed in the said valve seats as seat-through passages; valve-pieces arranged (85) in the valve seats, each valve piece having a spherical surface that corresponds to the surface of the valve seats; and a valve housing (87) provided with resilient means (86) that resiliently presses the valve-pieces onto the valve seat surfaces.







    Search report