Abstract: A breathing valve having a valve chamber connectable to a gas supply and to a breathing device, a gas flow opening for exit of exhaled gases through which atmospheric air may be inducted into the chamber, a valve member in the chamber, a one-way flow opening in the valve member through which gas may flow from the chamber for breathing, and preventing return flow in the opposite direction, a movable valve closure forming part of the valve member movable into and out of sealing engagement with the exit gas flow opening, and a pressure responsive device in the valve member responsive to obstruction of gas flow into the chamber and further responsive to inspiratory effort by a patient to cause the valve member to move away from the exit gas flow opening for permitting air flow through the exit gas flow opening into the chamber for inhalation.

Abstract: A multi-function valve for administration of gases having a valve chamber with an administration opening for delivery of gases to a patient, a pressurized gas inlet, an inlet valve with an arm extending into the interior of the chamber, a resuscitation fluid inlet opening into such chamber, a diaphragm dividing the chamber into two halves with the resuscitation inlet on one side and the administration opening and the pressurized gas inlet on the opposite side, the diaphragm having a contact portion movable into and out of contact with the arm, and an opening in the diaphragm for fluid flow from one side of the chamber to the other, the opening being sized to permit the diaphragm to respond to fluid flow in the chamber, and cause operation of the gas inlet valve.

Abstract: A manually operable resuscitator bag of one-piece construction having a generally elongated football shape, an inlet at one said end, and an outlet at the other end, fold-rings in each end portion having walls of reduced thickness, whereby the ends may be telescoped, ridges of thickened wall section between the fold-rings, the center of the bag having a wall thickness equal to the thickness of said ridges in the tapering ends between the fold-rings, and longitudinal ribs formed on the outer surface of the center of the bag spaced around the circumference, providing increased resiliency and a rapid recovery for the shape of the bag.