Abstract: A regulator for the control of high pressure gases comprises a first piston type regulator stage and a one piece resilient flow control washer which serves as a second regulating stage. The flow washer comprises a resilient element having an orifice therein through which the regulated gas passes. The washer is shaped and mounted so that gas pressure variations deform the washer and vary the size of the orifice to maintain a constant gas flow rate therethrough.

Abstract: A demand regulator for admitting oxygen into emergency breathing systems, resuscitators, and the like comprising a casing supporting a diaphragm and providing a chamber on one side of the diaphragm communicating with the breathing system. The other side of the diaphragm is open to atmospheric pressure. A tilt valve assembly connected to a source of pressurized oxygen opens into the chamber at one side of the diaphragm and includes an elongated tilt valve stem having a free end disposed proximate the center of the diaphragm. The tilt valve is disposed at an acute angle to the diaphragm and is seated by a light cone spring so that only a slight pressure of the diaphragm on the valve stem is required to dislodge the valve from its seat to permit an inflow of oxygen through the valve. For use in a resuscitator, an exhaust check valve and means for normally actuating the tilt valve while closing the check valve are provided.