Needleless syringe
AssigneeDaicel Corporation
InventorMasatake Kudoh
Life of this patent
Estimating the term…
Abstract
A needleless syringe comprises an enclosing unit for an injection objective substance, a pressurizing unit for the injection objective substance, a discharge unit having a flow passage for allowing the injection objective substance to flow therethrough so that the injection objective substance is discharged from an open end of the flow passage to an injection target area, the open end being formed so that an area thereof is smaller than a flow passage area of the enclosing unit, and a minute pore unit including a minute pore having a flow passage area smaller than the area of the open end of the discharge unit and which is arranged on an outer side of the open end so that the injection objective substance discharged from the open end passes through the minute pore and arrives at a side of the injection target area.
Claims20
A needleless syringe for injecting an injection objective substance into an injection target area of a living body without using an injection needle, the syringe comprising:
- an enclosing unit which encloses the injection objective substance;
- a pressurizing unit which pressurizes the injection objective substance enclosed in the enclosing unit;
- a discharge unit which has a flow passage for allowing the injection objective substance pressurized by the pressurizing unit to flow therethrough so that the injection objective substance is discharged from an open end of the flow passage to the injection target area outside the syringe, the open end being formed so that an area thereof is smaller than a flow passage area of the enclosing unit;
- and
- a minute pore unit which includes a minute pore having a flow passage area smaller than the area of the open end of the discharge unit and which is arranged on an outer side of the open end so that the injection objective substance discharged from the open end passes through the minute pore and arrives at a side of the injection target area.
4-8. (canceled)
An operating method for operating a needleless syringe for injecting an injection objective substance into an injection target area without using an injection needle, the needless syringe comprising an enclosing unit which encloses an injection objective substance, and a pressurizing unit which pressurizes the injection objective substance enclosed in the enclosing unit, the operating method comprising:
- a step of pressurizing the injection objective substance enclosed in the enclosing unit by the pressurizing unit;
- a step of allowing the injection objective substance pressurized by the pressurizing unit to flow into a flow passage in an discharge unit, the flow passage having an open end for discharging the injection objective substance to an injection target area outside the syringe, an area of the open end being formed to be smaller than a flow passage area of the enclosing unit;
- and
- a step of allowing the injection objective substance to pass through a minute pore unit including a minute pore arranged on an outer side of the open end and having a flow passage area smaller than an area of the open end of the discharge unit, before the injection objective substance, which is discharged from the open end, arrives at the injection target area.
Dependencies are inferred from the claim text.