Patent ID: 7563245
Filing Date: 2009-07-21
Classification: A61M

Abstract:
1. A syringe for powder medicament premixing, comprising a sleeve; a plunger that is provided on an upper portion of the sleeve; a solvent bottle that is positioned within said sleeve, said solvent bottle having a bottom opening that is provided with a first sealing plug that is made of a material selected from the group consisting of surgical rubber and innoxious rubber, a guiding recess being provided at a central portion of the first sealing plug; a solute bottle that is positioned within said sleeve, said solvent bottle being positioned above said solute bottle, said solute bottle having a bottom opening that is provided with a second sealing plug made of a material selected from the group consisting of surgical rubber or innoxious rubber and a guiding recess is provided at a central portion of the second seal plug, a piston being provided inside the solute bottle; a connecting tube, said connecting tube having two piercing ends and being provided between the solvent bottle and the solute bottle, one piercing end of the connecting tube being fixed to a bracket that is positioned in a bottom opening of the solvent bottle, at least two protrusions being formed on an inner side of the bracket, said protrusions being in contact with the bottom opening of the solvent bottle; a syringe needle having two piercing ends, one of said piercing ends being in communication with a bottom portion of said solute bottle, said piercing end being fixed to a bracket that is positioned in said bottom opening of the solute bottle and wherein at least two protrusions are formed on an inner side of the bracket, the protrusions being in contact with the bottom opening of the solute bottle; and wherein the second sealing plug, bracket and the syringe needle with two piercing ends are covered with protecting jacket; and wherein the sleeve is provided with restricting slots, the restricting slots including a first restricting slot and a second restricting slot, —both of which are upside-down “L”-shaped and communicate with each other, and a plunger sleeve is integrated with the plunger, said plunger sleeve being provided with buckles that are vertical to the plunger sleeve, the buckles being fitted into one of the first restricting slot or the second restricting slot, wherein two tongues are arranged on two sides of a lower edge of the plunger sleeve so as to be symmetrical to the axis thereof, and two slots corresponding to the positions of the tongues are arranged on the two sides of the upper edge of an inner sleeve so as to be symmetrical to the axis thereof.