Abstract: A syringe comprising means making it possible to make the plunger (3) integral with the end (5) of the plunger stem (4) during the first filling, and to cause the disconnection between these elements during a refilling attempt.According to the invention, the connecting means between the plunger (3) and the stem (4) comprise an intermediate memorization member (6) formed such that, during filling, it ensures that these two elements (3, 4) are integral while the injection, that is to say the pressure on the plunger stem (4), causes the displacement of the intermediate member (6) relative to the two elements (3, 4) so that the latter become detached upon any second filling attempt.

Abstract: A frozen-food server comprises a scoop-shaped head of a massive light metal, e.g. aluminum, provided with a cavity in which is lodged a unit formed with an electric heater, the thermostat and electrical controls for the heater, this cavity being formed on a stem of the head which is received in a tubular handle formed by a sleeve through which an electrical conductor passes. According to the invention, a rigid insulating tubular body is interposed between this stem and the sleeve, receives the electrical connection between the heater circuit and the conductor, and also accommodates a thermally shrunk tube which seals the junction.