Abstract: A non-return valve for use in plastic injection molding is disclosed comprising an elongated body having a threaded end for connection to one end of a reciprocating feed screw. A first removable valve seat insert is received over a cylindrical portion on the valve body and is in abutment with a shoulder formed on the body. A second removable valve seat insert is also received over the cylindrical body portion and is axially spaced from the first valve seat by a tubular spacer. A ring-shaped valve member having valve surfaces on each end face thereof is disposed between the first and second valve seat inserts. An anti-rotation pin is mounted in the valve body and extends into a keyway type notch formed into the first valve insert. The axial clamping force developed by the threaded connection between the valve body and the feed screw functions to clamp the valve seat inserts and the tubular spacer into assembly.

Abstract: A fluid supply is provided for inflating an expandable confinement of a vehicle occupant restraint system of the type activated in response to a vehicle collision signal. The fluid supply includes a housing defining a fluid discharge port for directing fluid flow from the housing and a gas generating material disposed within the housing. The gas generating material includes a sustaining charge comprising a plurality of layers of granulated material, the layers being approximately equal by weight. Screens are disposed between each pair of adjacent layers of the sustaining charge. Each of the screens has a mesh substantially finer than the granules of material in the layer adjacent the screen and oppositely disposed from the fluid discharge port. The sustaining charge is activated in response to a collision signal.