Patent ID: 7699814
Filing Date: 2010-04-20
Classification: A61M

Abstract:
1. A syringe assembly, comprising: a syringe body with opposite front and rear ends, the body being adapted to hold fluid to be injected into a patient; a needle extending from the front end of the syringe body; a plunger slidably mounted in the rear end of the syringe body; a tube slidably mounted on the plunger and having an enlarged thumb tab; and the plunger and tube having smooth mating cylindrical surfaces for sliding movement of the plunger into the tube; a protective sheath having a longitudinal axis, and a tubular forward end in which the syringe body slidably resides and a rear end with a flange extending from the sheath toward the tube and perpendicular to the longitudinal axis, the flange having an opening through which the tube slidably resides such that the sheath is mounted to both the syringe body and to the tube; wherein the needle is movable from a first position outside the sheath for injecting the fluid into a patient and a second position within the sheath to prevent accidental sticking by the needle.