(19)
(11) EP 0 615 899 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
17.11.1994 Bulletin 1994/46

(43) Date of publication A2:
21.09.1994 Bulletin 1994/38

(21) Application number: 94301791.3

(22) Date of filing: 14.03.1994
(51) International Patent Classification (IPC)5: B63C 11/22, B63C 11/08
(84) Designated Contracting States:
BE DE ES FR IT

(30) Priority: 15.03.1993 GB 9305256

(71) Applicant: Craske, Stephen Allan
Exeter, Devon EX4 4HJ (GB)

(72) Inventor:
  • Craske, Stephen Allan
    Exeter, Devon EX4 4HJ (GB)


(56) References cited: : 
   
       


    (54) Scuba breathing apparatus


    (57) Air is inhaled from a high pressure supply via a demand valve 10, a main breathing chamber 20, and a mouthpiece 30. Exhaled air passes through chamber 20, exhaust valve 40, and a secondary chamber 50, to exit via an exhaust port 60. A buoyancy jacket can be inflated from the high pressure supply via a first button-operated valve 70 and a flexible conduit 80. The jacket can also be inflated from mouthpiece 30 by depressing a second button 90 to sealably close port 60 and open a buoyancy valve 100 between chamber 50 and conduit 80. The non-return exhaust valve 40 allows air to flow in one direction from mouthpiece to jacket but prevents reverse flow.






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