Abstract: A hypodermic jet injector employing self-contained, patient fillable, thin-walled disposable ampules. Each ampule includes an elongate plastic body with an injection orifice at a first end, an internal propellant at a closed second end, and a double piston slidably and sealingly mounted within the body entirely between the orifice and the internal propellant, and also includes an auxiliary access opening in the ampule side wall. An ampule chamber with a corresponding access opening in its side wall is provided to receive and support the thin-walled ampule. The main body of the ampule is molded with draft angles, and the double piston construction includes a soft rubber plunger and a relatively hard plunger to the front and rear, respectively, of the auxiliary access opening in the ampule, with the two plungers interconnected by a connecting rod spanning the central section of the ampule.

Abstract: A portable collapsible crib, comprising a rigid frame that is separable at the midpoints of a pair of opposing sides into a first and second frame half. A rotatable hinge coupling each said frame half at said midpoints pivotal about first axes for collapsing the frame halves one upon the other at the midpoints, and rotatable about second axes that are perpendicular to the first axes for rigidly supporting the frame halves in inflexible planar alignment. Legs, mounted to and rotatable with the rotatable hinge elevate the frame to a predetermined height when disposed downwardly from the frame, the rotatable hinge being concurrently rotated into the frame inflexible position, the legs being further rotatable into parallel planar alignment while the frame, with the rotatable hinge is rotated into the frame collapsing position.

Abstract: A steering gear mechanism includes a housing and a worm gear having an input portion. The worm gear is supported for rotation in the housing. A sector gear has teeth in meshing engagement with teeth formed on the worm gear. The sector gear has an output portion. A circumferentially expandable spring pin supports the sector gear for pivotal movement relative to the housing and biases the sector gear into meshing engagement with the worm gear to compensate for wear of the gears. The housing has means for supporting the spring pin.

Abstract: A portable collapsible crib, comprising a rigid frame that is separable at the midpoints of a pair of opposing sides, rotatable hinging means coupling the frame halves at said midpoints, hingingly operable about first axes for foldably collapsing the frame halves one upon the other at the midpoints, and rotatably operable about a pair of second axes that are perpendicular to the first axes for rigidly supporting the frame halves in inflexible planar alignment. Leg means are provided, mounted to and rotatable about the frame concurrently with the rotatable hinging means being further rotatable about the frame and into the area bounded by the frame, with the rotatable hinging means being concurrently rotated into the frame collapsing position.