Patent ID: 9533130
Date: 2017-01-03
CPC Classifications: A61B,A61J,A61M

Claim:
1. A syringe, comprising: a first sleeve having an opening end and an engaging end, the opening end of the first sleeve having a sleeve opening; a sleeve piston having two ends with one end thereof having a protrusion, the two ends of the sleeve piston being communicated with each other via at least one through hole, the sleeve piston being disposed in the first sleeve to be movable, one of the two ends of the sleeve piston without the protrusion facing toward the opening of the first sleeve and being spaced from the opening of the first sleeve with a distance; a pressure vessel containing a fluid with a pressure that is larger than an environment pressure and having a vessel opening disposed to face the protrusion and sealed by a vessel lid; a second sleeve having a closed end and an opening end being opposite to the closed end, wherein the second sleeve has a sleeve inner tube, wherein the sleeve inner tube has a closed end which is connected to the closed end of the second sleeve, a length of a peripheral wall of the sleeve inner tube being shorter than a length of a peripheral wall of the second sleeve, and a gap existing between the peripheral wall of the sleeve inner tube and the peripheral wall of the second sleeve, wherein when the first sleeve is assembled with the second sleeve and the protrusion pierces the vessel lid, the peripheral wall of the first sleeve inserts into the gap between the peripheral wall of the sleeve inner tube and the peripheral wall of the second sleeve, the peripheral wall and the closed end of the sleeve inner tube and the sleeve piston define a space, and the pressure vessel is stabilized inside the sleeve inner tube and thereby in the space defined by the sleeve inner tube and the sleeve piston, wherein when the first sleeve is assembled with the second sleeve and the peripheral wall of the first sleeve inserts into the gap between the peripheral wall of the sleeve inner tube and the peripheral wall of the second sleeve, the peripheral walls of the first sleeve, the sleeve inner tube, and the second sleeve are assembled to form a triple-layer configuration, and wherein when the protrusion pierces the vessel lid, the fluid inside the pressure vessel flows into a first accommodating space in the first sleeve through the vessel opening and the at least one through-hole.