Patent ID: 7306579

Claim:
A needleless port comprising: a pedestal that forms a part of a flow channel and has an opening to the flow channel; a cover that is engaged with the pedestal at a position corresponding to the opening and has a cavity that opens to exterior at a predetermined distance from the opening; and a septum that is held in the cavity and is made of a resilient material with a passageway for allowing an insertion member to be inserted from the exterior to the opening, wherein the septum comprises a main body that extends from an inner end on the pedestal side toward an outer end on the exterior side of the cavity of the cover, with the passageway being formed between an inner-end face and an outer-end face thereof, and compression ribs provided on an external surface of the main body, the main body has a cross section in a direction orthogonal to the passageway of a shape having an external dimension in a length direction larger than that in a breadth direction, the passageway includes a slit and a bore, the slit originating at the outer end face of the main body and extending in the same direction as the length direction so as to have a predetermined depth from the outer-end face of the main body, and the bore extending from the slit to the inner-end face of the main body prior to insertion of the insertion member and having a lateral section of a spindle shape whose major axis extends in the same direction as the length direction, the compression ribs are provided at the both side ends of the main body in the breadth direction so as to extend along the axial direction of the passageway, the cavity of the cover has a circular cross section whose diameter is smaller than a distance between the external surfaces of the compression ribs, and with the septum being held inside the cavity, a space is formed between the external surface of the main body at a part without the compression ribs and an internal wall of the cover, and the bore is closed by a compressive force applied from the internal wall of the cover to the septum via the compression ribs.