Closed cycle gas mask and breathing equipment for operation under pressure having a severance-operated connection shut-off for the breathing equipment

摘要

A closed cycle gas mask and breathing equipment for operation under pressure includes a gas connector connectible to a tubular fitting of the mask with an inhalation line and an exhalation line which open into a joint connection to a mask. The connection has a device for preventing the escaping of gas from the mask by closing the connection when the connection is undone from the mask. The wearer can disconnect himself from the cycle or enter it without a considerable loss of gas. For this purpose the connector has a non-return valve which when disconnected blocks the breathing gas supply in the inhalation direction which is mounted in the opening of the connector and which is held open by an actuator or detector provided at the mask tubular fitting when the mask is connected.