Airflow control valve
AssigneeJoseph Anthony GRIFFITHS
InventorsPhilip Dunn, Tamas Palinkas
Life of this patent
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Abstract
An airflow control valve (20) for use in a breathing apparatus (10) to control a flow of air from a pressurised air supply to a respirator. The valve comprises an inlet port (31) for connection to a pressurised air supply, and first (32) and second (33) outlets. The valve is configurable between a first position in which the inlet port is in restricted fluid communication with the first outlet to allow a restricted flow of air from the inlet port to the first outlet and in which the second outlet is sealed from the inlet port and, a second position in which the inlet port is in substantially unrestricted fluid communication with the second outlet to allow an unrestricted flow of air from the inlet port to the second outlet.
Claims30
An airflow control valve for use in a breathing apparatus to control a flow of air from a pressurised air supply to a respirator, wherein the valve comprises an inlet port for connection to a pressurised air supply, and first and second outlets, the valve being configurable between a first position in which the inlet port is in restricted fluid communication with the first outlet to allow a restricted flow of air from the inlet port to the first outlet and in which the second outlet is sealed from the inlet port and, a second position in which the inlet port is in substantially unrestricted fluid communication with the second outlet to allow an unrestricted flow of air from the inlet port to the second outlet.
A breathing apparatus comprising a respirator and an airflow control valve to control the flow of air from a supply to the respirator, wherein the control valve comprises an inlet port for connection to a pressurised air supply, and first and second outlets connected to the respirator, the valve being configurable between a first position in which the inlet port is in restricted fluid communication with the first outlet to allow a restricted flow of air from the inlet port to the respirator via the first outlet and in which the second outlet is sealed from the inlet port and, a second position in which the inlet port is in substantially unrestricted fluid communication with the second outlet to allow an unrestricted flow of air from the inlet port to the respirator via the second outlet.
30-34. (canceled)
Dependencies are inferred from the claim text.