Abstract: A valve nozzle structure include a valve stem. On the valve stem is a collar flange and along both sides of collar flange is a series of tapered retainer lips. A passage is formed through the valve stem, a flexible valve sleeve is inserted on the tapered retainer lips on one side of the valve stem, and a slit is incised in the valve sleeve, with the slit normally in a sealed state of closure. The foregoing structure permits gas to flowing towards the valve sleeve to travel only in a single direction through the passage.

Abstract: A pressure gauge structure that consists of a gauge frame with a graduated gauge face at the top of a lower base at the bottom. Protruding from the circumference of the lower base is an annular seat and a guide pipe that provides for gaseous flow. A diaphragm is positioned on the lower base and on the diaphragm is a coil spring topped by a shaft sleeve for a pivoting needle shaft in the tube mount protruding from the gauge face, with the needle shaft o the gauge meter positioned in a coil spring. A calibration rod extends laterally from the needle shaft, the upper end of which is secured in a pivotal state to the gauge face by a mounting base. Around the needle shaft is a spiral spring, one end mounted to the gauge frame and the other end attached to the needle shaft. Under the gauge frame is a hoop flange and the lower base has a guide pipe for gaseous flow. The diaphragm is constructed out of metal with corrugations formed on the surface.