Title:
BREATHING DEVICE
Document Type and Number:
Japanese Patent JPS5516696
Kind Code:
A
Abstract:
A face mask 16 is connected to a source 2 of breathing fluid through a pressure-demand regulator 14 and a supply line 6, 10. The regulator 14 admits breathing fluid to the mask 16 on demand and maintains a positive pressure within the mask at all times to prevent inflow from the surrounding atmosphere. The regulator 14 has a flow capacity considerably greater than that normally required, even when gasping or breathing heavily. An automatic shut-off device 12 in the supply line 10 upstream of the regulator 14 permits the peak flow of a predetermined breathing requirement but is responsive to abnormal flow conditions, as for example where the mask 14 is removed from the wearer, to close the supply line 10 and thereby prevent wasting of the air breathing fluid supply. The apparatus can be manually reset to normal operation and will reset itself after the mask is repositioned on the wearer.
Inventors:
JIYON ERU SARIBUAN
Application Number:
JP8977079A
Publication Date:
February 05, 1980
Filing Date:
July 14, 1979
Export Citation:
Assignee:
ATO INC
International Classes:
A62B7/04; A61M16/00; (IPC1-7): A61H31/00