(19)
(11) EP 0 254 548 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
26.04.1989 Bulletin 1989/17

(43) Date of publication A2:
27.01.1988 Bulletin 1988/04

(21) Application number: 87306473.7

(22) Date of filing: 22.07.1987
(51) International Patent Classification (IPC)4: A62B 18/10, F16K 15/02
(84) Designated Contracting States:
BE DE FR GB NL SE

(30) Priority: 23.07.1986 GB 8617950

(71) Applicant: Helmets Limited
St. Albans, Herts. AL4 8QT (GB)

(72) Inventors:
  • Briggs, Michael
    St. Albans, Herts. AL4 9ST (GB)
  • Smith, Simon Peter
    Bedfordshire LU2 8JW (GB)

(74) Representative: Coleman, Stanley (GB) et al
Amberley Totteridge Green
GB-London N20 8PE
GB-London N20 8PE (GB)


(56) References cited: : 
   
       


    (54) Improvements in gaseous fluid flow valves


    (57) A gaseous fluid flow valve suitable for use in respiratory apparatus comprises a valve body (2) formed with an aperture (3) which is closed by a plate-like closure member (5). Spring biassing means (7), suitably in the form of a bowed spring (13), urge the closure member to the position in which it closes the aperture. Support means of the closure member constrain movement thereof to a predetermined path. To enable the force of the spring biassing means (7) on the closure member to be varied, the spring mounting means is adjustable. Where a bowed spring is employed the spring ends are supported in mountings secured to the valve body one or both of which is adjustable. Other spring configurations with adjustable mountings are referred to.







    Search report