Automatic transfer regulator for hose-line respirator

Details Automatic transfer regulator for hose-line respirator Automatic transfer regulator for hose-line respirator

2005-01-04

2005-01-04

Bennett, Henry (Department: 3743)

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

C128S200240, C128S204180, C128S205180, C128S205220, C128S205230, C128S205240, C128S205250

Reexamination Certificate

active

06837243

ABSTRACT:
An automatic transfer regulator for automatically switching between a primary (hose line) breathing air source and a secondary source (escape cylinder). A pressure sensing system detects the line pressure of the primary source using a spring loaded poppet connected to one side of a transfer poppet valve, with the other side connected to the output of a reducer. The pressure sensing system is fed by the primary source through an orifice. When the sensor detects loss of hose line pressure, the system pressure is released to ambient. This bleeds the pressure from the system side of the transfer poppet valve, allowing the reducer output to force the poppet back, thus actuating the secondary source. A check valve prevents reducer output from escaping through the primary source inlet.

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