Patent ID: 8277424

Claim:
A needle-less syringe adapter, comprising: a tube having a body having a top end; a bottom end; a cavity defined in the top end and having an inner surface, a top inlet opening and a bottom partition opposite to the top inlet opening; an outlet hole defined through the bottom partition of the cavity, communicating with the cavity and having an inner surface; and an outlet channel defined in the body and communicating with the outlet hole; a resilient valve mounted in the cavity of the tube and having a top, a bottom and a chamber defined in the resilient valve and having a top slit defined through the top of the resilient valve and selectively closing to seal the chamber or opening to communicate with the chamber, wherein a default configuration of the top slit is closed; and a bottom slit defined through the bottom of the resilient valve and selectively closing to seal the chamber or opening to communicate with the chamber , wherein a default configuration of the bottom slit is closed; a piercing conduit formed as a unitary piece and tapered from an intermediate respectively toward top and bottom ends thereof so that an outer surface of the piercing conduit has slope, a top end of the piercing conduit selectively extending out through the top slit, a bottom end of the piercing conduit selectively extending out through the bottom slit, wherein the piercing conduit has a through hole defined longitudinally through the piercing conduit from the top end to the bottom end and selectively communicating with the outlet hole and the through hole has a top opening defined on the top end and facing upward instead of facing radially inward, and a bottom opening defined on the bottom end and facing downward instead of facing radially inward, wherein the top opening is entirely revealed out of the resilient valve when the top end of the piercing conduit extends out through the top slit, and the bottom opening is entirely revealed out of the resilient valve when the bottom end of the piercing conduit extends out through the bottom slit; and an injection member mounted on the top end of the body of the tube and having a top end, a bottom end and an internal space defined therein, wherein when the needle-less syringe adapter is not used, the top and bottom slits of the resilient valve are closed to seal the injection member and the outlet hole of the tube and the resilient valve encloses the piercing conduit, and a ventilation hole is defined between the tube and injection member so that air in the internal space of the injection member and the cavity of the tube is discharged through the ventilation hole.