Improvements in closed circuit breathing apparatus

(19)

(11)

EP 0 182 581 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	22.02.1989 Bulletin 1989/08

(43)	Date of publication A2:
	28.05.1986 Bulletin 1986/22

(21)	Application number: 85308211.3

(22)	Date of filing: 12.11.1985

(51)	International Patent Classification (IPC)⁴: A62B 9/00, A62B 7/10

(84)	Designated Contracting States:
	DE FR GB SE

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Priority:

13.11.1984 GB 8428689

(71)	Applicant: LIFE SUPPORT ENGINEERING LTD.
	Storrington Sussex RH20 3DN (GB)

(72)	Inventor:
	Richards, Brian John Billingshurst W. Sussex, RH14 9RB (GB)

(74)	Representative: Morton, Colin David et al
	Keith W Nash & Co. Pearl Assurance House 90-92 Regent Street Cambridge CB2 1DP Cambridge CB2 1DP (GB)

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References cited: :

(54)	Improvements in closed circuit breathing apparatus

(57) A closed circuit breathing apparatus comprising a mouthpiece coupled to a counterlung to which oxygen is admitted on demand by the wearer, a medium provided between the mouthpiece and the counterlung to absorb the exhaled carbon dioxide and a chemical heat exchanger in the form of activated carbon to reduce the temperature and relative humidity of the exhaled purified air resulting from the exothermic reaction in the carbon dioxide absorbing medium.

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