SELF-CONTAINED BREATHING SYSTEM
7 Assignments
0 Petitions
Accused Products
Abstract
A breathing apparatus is operable in self-contained and filtered modes of operation. In the self-contained mode of operation, a breathable gas is delivered to a user from a self-contained source of breathing gas. In a second, filtered mode of operation, a suction source draws ambient air through a filter removing contaminants and delivers filtered ambient air to the user. A method of delivering air to a subject is also provided.
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Citations
87 Claims
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1-66. -66. (canceled)
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67. A breathing apparatus, comprising:
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a chassis including a housing defining a breathing reservoir, a first inlet in fluid communication with said breathing reservoir for receiving breathable gas from a self-contained source of breathing gas, a second inlet in fluid communication with said breathing reservoir for receiving ambient air, and a first outlet in fluid communication with said breathing reservoir 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 breathing reservoir; a main filter assembly positioned between said second inlet and said breathing reservoir for removing contaminants from the ambient air. - View Dependent Claims (68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82)
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83. A method for providing breathable gas to a subject, comprising:
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providing a chassis having a housing defining an internal cavity, the cavity providing a reservoir of breathable gas and being fluidically coupled to an airway of the subject; selectively fluidically coupling the reservoir to a pressurized source of breathable gas or a source of filtered ambient air; delivering a flow of breathable gas to the subject from the pressurized source when the pressurized source is selected; and operating a suction source housed within the chassis to draw ambient air through a filtration medium and deliver a flow of filtered ambient air to the subject when the source of filtered ambient air is selected. - View Dependent Claims (84, 85, 86)
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87. A breathing hose assembly for delivering a breathing gas to a user, comprising:
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an inner perforated hose extending from a first end of the breathing hose assembly to a second end of the breathing hose assembly; an outer flexible bag surrounding the inner perforated hose, the outer flexible bag being inflatable to hold a volume of air for subsequent delivery to the user.
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Specification