Title:
PURIFIER AND RESPIRATOR
Document Type and Number:
Japanese Patent JPS61268272
Kind Code:
A
Abstract:
A self-rescue breathing apparatus having a combined cylinder-head and first-stage pressure-reducing valve 2 and a demand valve 5. The pressure- reducing valve 2 has a piston 31 and valve member 24 opposed to one another so that the inlet port 22 is within the valve cylinder 21 and only a single pressure seal 32, round the piston head 31 is needed. The cylinder head valve 2 also has means 14 to 20 for recharging the gas cylinder 1 without removing the gas cylinder from the apparatus or the valve 2 from the gas cylinder. The demand valve 5 is a negative-pressure diaphragm valve with a combined spring and valve lever 63 holding the valve shut against the supply pressure and a second lever 73 engaging the diaphragm 60 and lifting the first lever 63. The two-lever mechanism gives a compact and easily- adjusted valve mechanism. The apparatus also has a CO2 removing oxygen purifier (4, Fig. 3, not shown) and a breathing bag (10, Fig. 5, not shown) folded, rolled up and stored in an end cap (9, Fig. 1, not shown) when not in use.
Inventors:
TOREBAA KONSUTANSU HIYUUZU
Application Number:
JP4949086A
Publication Date:
November 27, 1986
Filing Date:
March 06, 1986
Export Citation:
Assignee:
SHIIBU GOOMAN & CO LTD
International Classes:
A62B7/00; A62B7/02; A62B9/00; A62B9/02; A62B18/10; A62B19/00; (IPC1-7): A62B7/10; A62B9/02; A62B18/10
Attorney, Agent or Firm:
Asamura Akira
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