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US 7,451,763 B2Granted
Pneumatic shuttle valve for a ventilator system
AssigneeNorgren Limited
InventorTom Thong Nguyen
Life of this patent
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Abstract
A pneumatic shuttle valve for a ventilator is disclosed. The pneumatic shuttle valve selectively connects one of two inlet openings to an outlet opening. The shuttle valve has a plug that is forced by gas pressure entering the second inlet opening, to move to and seal against a first sealing surface, thereby forming a passageway between the second inlet opening and the outlet opening. The plug is forced by gas entering the first inlet opening, to move to and seal against a second sealing surface, thereby forming a passageway between the first inlet opening and the outlet opening.
Claims10
A ventilator, comprising:
- a manifold having a shuttle valve passageway formed into the manifold;
- the shuttle valve passageway ending in a first sealing surface;
- the shuttle valve passageway coupled to a first inlet opening at the first sealing surface;
- a shuttle plug cap having a second sealing surface, where the shuttle plug cap is inserted into the shuttle valve passageway with the second sealing surface facing the first sealing surface, the shuttle plug cap forming a second inlet opening where the second inlet opening is coupled to the second sealing surface;
- an outlet opening intersecting with the shuttle valve passageway between the first and second sealing surfaces;
- a plug captured between the first and second sealing surfaces and configured to seal against the first and second sealing surfaces, the plug forming a seal against the first sealing surface when a pressure source is coupled to the second inlet opening, the plug forming a seal against the second sealing surface when a pressure source is coupled to the first inlet opening.
3 more elements
Dependencies are inferred from the claim text.