EP 0148543 B1 19871028 - IMPROVEMENTS TO BREATHING APPARATUS
Title (en)
IMPROVEMENTS TO BREATHING APPARATUS
Publication
Application
Priority
EP 84300140 A 19840110
Abstract (en)
[origin: EP0148543A1] In a breathing apparatus of the closed circuit type wherein breathable air is recirculated with the removal of carbon dioxide and the replenishment of oxygen, the breathable air is cooled by causing it to flow through a conduit (1) in heat exchange relationship with a reservoir (2) containing a liquid refrigerant medium which has a boiling point below the maximum desired temperature of the breathable air supply. The reservoir is vented to allow escape of refrigerant gas through an adjustable pressure relief valve (4). whereby cooling of the breathable air supply is effected through a progressive boiling away of the refrigerant liquid from the reservoir, the boiling point of the liquid being controlled by means of a corresponding adjustment of the pressure relief valve.
IPC 1-7
IPC 8 full level
A62B 9/00 (2006.01)
CPC (source: EP)
A62B 9/00 (2013.01)
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
EP 0148543 A1 19850717; EP 0148543 B1 19871028; DE 3466934 D1 19871203
DOCDB simple family (application)
EP 84300140 A 19840110; DE 3466934 T 19840110