HYPODERMIC SYRINGE HAVING A SELECTIVELY RETRACTABLE NEEDLE

• Main Author: JON S. BELL
• Format: Patent
• Language: Chinese; English
• Published: 17.05.2002
• 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 syringe (10) includes an elongate barrel (12) having an open proximal end (18) and a distal end (20) that includes a fitting (22). It also has a plunger (24) having a proximal end (26) and a distal end (28), sized for slidable movement within the barrel (12) thereby defining a chamber (30) within the barrel. The plunger (24) also has an elongate cavity (32) therewithin that has a closed proximal end (34) and an open distal end (36). The open end (36) of the plunger (24) is closed by a selectively releasable closure (38). The syringe has a hub (42) that attaches to the barrel (12) with a fitting (44) conjugate to the fitting (22). The hub (42) includes an elongate needle (48) having a proximal end (50), a distal end (52) and a fluid path (54) therethrough. The needle (48) is positioned in the passageway (46) for slidable movement between a first position wherein the fluid path (54) of the needle (48) is in fluid communication with the chamber (30) and a second position. The needle (48) has a mount at its pro