A needle free connector for fluid passage having a valve body with a first port; a second port; a hollow resilient membrane disposed in the valve body and having: a first end and a second end is disclosed. A flank is provided and extends between the first end and the second end fitting with the internal surface of the valve body. A slit of the first end is closed when the first end is disposed in the first port or opened when the first end is pushed into the valve body. The disclosure also proposes a drug recipient including a bottle or a bag designed to store drug and the needle free connector. The disclosure offers a needle free connector with a slitted resilient membrane having reduced priming volume.

A body-fluid-and-medication leak-proof and closed medical connector has a first connecting assembly and a second connecting assembly. The first connecting assembly has a first sleeve and a first resilient valve. The first resilient valve tends to seal a first opening of the first sleeve. The second connecting assembly has a second sleeve and a second resilient valve. The second resilient valve tends to seal a second opening of the second sleeve. The two resilient valves can avoid leakage of the medication remaining in an injector and a vial, or remaining in a fluid infusion tube and a catheter. The two resilient valves also can seal in two directions to avoid leakage during connecting or separating the two connecting assemblies after supplying medication. Therefore, the transfer of the medication is more hygienic and safe, and the waste of medical resources is effectively reduced.

A needle-less connector includes a housing having a drug solution flow path, and an elastic valve body. An end surface of the housing on a side of a tip end opening of the drug solution flow path constitutes a protruding support surface whose center section protrudes and slopes in a direction of a foot, and the elastic valve body is superposed onto the protruding support surface in a state of close contact therewith. Insertion of a male luer into a slit of the elastic valve body causes expanding deformation of the elastic valve body along the protruding support surface. A flexion section is formed on a sloped surface of the protruding support surface, and the sloped surface has different tilt angles on a foot section side and on a crest section side of the flexion section.

A connecting device for a medical infusion system includes a connection piece which has a connecting profile for the connection of a functional part of the infusion system. The connecting device also has a resiliently flexible, cup-like valve body which is arranged in the connection piece and has a valve casing and cap-shaped top region which is provided with a slit arrangement. Further, the connecting device has a dimensionally stable base portion on which a base ring of the valve casing is supported and which is firmly connected to the connection piece. In the unloaded initial state, the valve casing has a convex internal contour which, starting from the cap-shaped top region, first expands in the direction of the base ring and subsequently narrows again, forming an O-like internal longitudinal section. The connecting device can be in the form of a three-way stopcock for an infusion system.

A male connector is connectable to a female connector and includes: a flow path tubular member that has an opening at an end portion; a valve body that closes the opening; a housing main body; and a moving body that moves with respect to the housing main body and deforms the valve body so as to change a mode between a first mode in which the opening is closed by the valve body and a second mode in which the opening is open from the valve body. The moving body includes a locking portion that locks the female connector in a state in which the valve body and an elastic valve body of the female connector abut on each other.

A pressure relief valve for a reservoir has a main body with a central chamber defining an outer radial seat, a positive-pressure port with an inner radial seat, and a negative-pressure port comprising an internal passage spanning the outer seat. The sealing disk has an anchor body retained in the central chamber and a flexible diaphragm biased against the outer seat. An axial passage in the anchor body couples the central chamber to ambient atmospheric pressure. The sealing ball is biased against the inner seat. When a pressure inside the reservoir exceeds ambient by a positive-pressure threshold, then the sealing ball lifts off the inner radial seat to exhaust a gas through the positive-pressure port. When the pressure inside the reservoir is below ambient by a negative-pressure threshold, then the diaphragm is lifted off the outer seat to intake atmospheric gas into the reservoir.

A check valve for use in a fluid pathway. The check valve may have a diaphragm and a plurality of supports extending from the diaphragm. The check valve and supports have a line of symmetry, and deformation of the check valve as it moves from a closed position to an opened position can be generally along the line of symmetry.

A medical connector for use in a fluid pathway includes a substantially transparent housing having a proximal end with a proximal opening and a distal end with a distal opening, and a cavity extending therebetween. The connector provides a substantially visible fluid flow path extending through a substantial portion of the connector.

A medical connector is described which is formed by a body having an inlet port, an outlet port through a male luer portion of the body, and a fluid path between the inlet port and the at least one outlet ports. A retractable post extends through the fluid path in the male luer sealing a tip of the male luer thereby closing the fluid path when the connector in not activated. There is a seal between the retractable post and the body that forms a fluid volume within a portion of the cavity. The fluid path passes through the fluid volume. When actuated, the retractable post is forced away from the tip of the male luer, thereby opening the fluid path through the medical connector and decreasing the fluid volume.

An exemplary syringe adapter for coupling with a syringe may include a housing. A needle-free connector may be disposed in the housing. A communication member may be in slidable engagement with the housing. The communication member may be slidable, with respect to the housing, between an unactuated state and an actuated state of the syringe adapter. A cannula may extend from the communication. In the unactuated state, the cannula may be retracted within the needle-free connector. In the actuated state, the cannula may protrude through and axially beyond the needle-free connector.