Patent ID: 7647927
Filing Date: 2010-01-19
Classification: A61M,A62B

Abstract:
1. A breathing apparatus comprising: a chassis defining a passageway for a breathable gas, said chassis further comprising a first inlet for receiving breathable gas from a self-contained source of breathing gas, a second inlet for receiving ambient air, and a first outlet for delivering breathable gas to a user; a suction source mounted within said chassis and in fluid communication with said second inlet for drawing ambient air into said passageway; a main filter assembly including a main filter positioned between said second inlet and said passageway for removing contaminants from said ambient air; one or more self-contained sources of breathing gas removably attached to said chassis and selectively fluidically coupled to said first inlet; and one or more modules interchangeably attachable to the chassis in place of one of the one or more self-contained sources of breathing gas, wherein said one or more modules are selected from a cutting torch, a hydration module, a circulating source of heating and/or cooling fluid, and combinations thereof.