Self-contained breathing apparatus with provision for shared...

Details Self-contained breathing apparatus with provision for shared... Self-contained breathing apparatus with provision for shared...

A - Human Necessities

62

B

137/1.5

A62B 7/04 (2006.01) A62B 7/02 (2006.01) A62B 9/00 (2006.01)

Patent

CA 1186587

SELF-CONTAINED BREATHING APPARATUS WITH PROVISION FOR SHARED USE Abstract of the Disclosure Self-contained breathing apparatus comprising a portable tank containing a supply of breathing air under high pressure, a main pressure regulator for reducing the pressure of air from the tank to a moderate level, a face mask having a demand valve mounted thereon which receives air from the main pressure regulator through a main supply hose and which controls the pressure and flow thereof to meet the users requirements, a bypass Pressure regulator and flow control means which receives air from the tank and which con- trols the pressure and flow of air to the mask, through a separate bypass hose, to provide breathing air to the mask in the event of a fault in the main breathing circuit. The bypass hose is attached to the bypass pressure regulator and flow control by means of manu- ally operable quick disconnect fitting, enabling emergency sharing of the air supply by a second, similarly equipped user.

413497

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