Breath responsive powered air-purifying respirator

Details Breath responsive powered air-purifying respirator Breath responsive powered air-purifying respirator

2007-08-14

2011-12-06

Yu, Justine (Department: 3771)

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

C128S204210, C128S204220, C128S204260, C128S205240, C128S205250

Reexamination Certificate

active

08069853

ABSTRACT:
A system for regulating the airflow to a closed environment using feedback control for the position of a control valve and blower speed. The system provides a control apparatus that regulates airflow to a closed environment, such as the mask of a breathing apparatus, to ensure sufficient breathing air for a wearer of such mask. In order to provide fast response to a change in condition in the breathable environment, the airflow regulator includes a valve control and a blower control.

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