Positive/negative air pressure adaptor for use with respirators
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United States of America Patent
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-
Jan 14, 1997
Grant Date -
N/A
app pub date -
May 3, 1995
filing date -
May 3, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A positive/negative air pressure adaptor for a respirator system. The positive/negative air pressure adaptor has a port region for fluidically coupling a filter cartridge to a respirator. The adaptor has an inlet port for connecting to a positive pressure air source and a first check valve to restrict the flow of air from the port region to the filter cartridge. A second check valve may be provided to restrict the flow of air from the respirator to the port region. When the positive pressure air source is disconnected, the respirator system operates as a negative pressure respirator.
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