Abstract: A manifold assembly for a ventilator is disclosed. The manifold assembly has an oxygen inlet connector and compressed air inlet connector mounted on the front face of the manifold. A compressed air filter and an oxygen filter are mounted on the bottom side of the manifold. Two regulator mounts are integrated into the manifold and an oxygen regulator and a compressed air regulator are mounted into the two regulator mounts.

Abstract: An integrated regulator mount for a ventilator is disclosed. The ventilator has the regulator mount built into a manifold. The regulator mount is formed into the manifold on two opposite faces. One face is configured to mount the valve seat for the regulator. The valve spring assembly is held against the valve seat by a valve spring retaining plug mounted in the manifold. The regulator case and diaphragm assembly mount on the opposite face of the manifold.

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.