Emergency syringe

• Main Author: MA; AUSTIN C
• Format: Patent
• Language: English
• Published: 09.02.1982
• Subjects: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROMTHE BODY; HUMAN NECESSITIES; HYGIENE; MEDICAL OR VETERINARY SCIENCE

A hypodermic syringe of the type having a containment chamber for a long term storage of a liquid drug contained therein. The chamber is preferably of a tubular glass construction which includes at one end a truncated conical forward portion having an exit path which is normally blocked by a rubber stopper while the liquid drug is in storage. The stopper lies inside the chamber and is held in fixed displaced relation to the needle of the syringe on an extension support comprising part of a nose piece of generally cylindrical shape that overlies the conical portion of the chamber in concentric slideable engagement therewith. A rear piece in concentric fixed engagement with the rear portion of the chamber retains a plunger at that end of the chamber whereby the liquid drug contained therein may be dispensed from the chamber after the fluid path is opened. The nose piece and the rear piece terminate at about the mid-section of the container in annular flanges displaced parallel to each other whereby compressive force applied to such flanges results in movement of the nose piece toward the rear of the syringe disengaging the stopper from the conical portion of the glass tube container thus opening a fluid path for dispensing the drug through the needle of the syringe. In a preferred embodiment overlapping snaps are provided to lock the two flanges in parallel engagement after the nose piece is pulled rearwardly to open the fluid path.