(19)
(11) EP 0 301 732 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
22.11.1990 Bulletin 1990/47

(43) Date of publication A2:
01.02.1989 Bulletin 1989/05

(21) Application number: 88306470.1

(22) Date of filing: 14.07.1988
(51) International Patent Classification (IPC)4: A62B 17/04
(84) Designated Contracting States:
AT BE CH DE ES FR GB GR IT LI LU NL SE

(30) Priority: 29.07.1987 GB 8717988
01.08.1987 GB 8718272
28.05.1988 GB 8812779

(71) Applicant: The British Petroleum Company p.l.c.
London EC2Y 9BU (GB)

(72) Inventors:
  • Audley, Gary James
    Sunbury-on-Thames Middlesex, TW16 7LN (GB)
  • Brown, David Emmerson
    Sunbury-on-Thames Middlesex, TW16 7LN (GB)
  • Bailey, Hubert Charles
    Ealing London W13 9QD (GB)
  • Dyson, Timothy James
    Sunbury-on-Thames Middlesex, TW16 7LN (GB)
  • Grint, Alan
    Sunbury-on-Thames Middlesex, TW16 7LN (GB)
  • Murlewski, George David
    London, EC2Y 9BU (GB)
  • Murray, Bruce Lawrence John
    London, EC2Y 9BU (GB)
  • Ross, John Alexander Strachan
    Aberdeen AB9 1FX (GB)

(74) Representative: Dodding, Robert Anthony et al
BP INTERNATIONAL LIMITED Patents Division Chertsey Road
Sunbury-on-Thames Middlesex, TW16 7LN
Sunbury-on-Thames Middlesex, TW16 7LN (GB)


(56) References cited: : 
   
       


    (54) Breathing apparatus


    (57) A breathing apparatus comprising a hood (2) has inflatable means for reducing the dead volume of the hood. The inflatable means may be a chamber (3) formed by a flexible membrane (1) attached to the hood (2), the chamber (3) being inflatable by the individual exhaling through a one-way valve (12) or by reduced pressure in the hood (2) created as the individual inhales thereby causing air to flow into the chamber (3) through a one-way valve (12) from outside the hood (2).







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