Patent ID: 7802589

Claim:
A flow control valve for medical liquid comprising: a housing including an inlet and an outlet; the housing including a first cylindrical wall defining a first interior bore and first and second axially spaced-apart openings extending through the first cylindrical wall; a flow control member including a second cylindrical wall defining a second interior bore, the flow control member rotatably disposed within the first interior bore and having at least one discrete aperture in a first plane, at least one discrete aperture in a second plane, and a discrete aperture in a third plane; a first tube having a first size and communicating at one end with one of the inlet or outlet and at the other end with the first opening in the first cylindrical wall, and a second tube having a size different from the first tube and communicating at one end with the one of the inlet or outlet and at the other end with the second opening in the first cylindrical wall; the flow control member being rotatable between a first position and a second position, in the first position one of the at least one discrete aperture in the first plane being in communication with the first opening in the first cylindrical wall to define a first flow rate out of the discrete aperture in the third plane, and in the second position one of the at least one discrete aperture in the second plane being in communication with the second opening in the first cylindrical wall to define a second flow rate out of the discrete aperture in the third plane different from the first flow rate; and a cylindrical stem extending into the second interior bore defined by the second cylindrical wall of the flow control member, the cylindrical stem and the second cylindrical wall defining an cylindrical space allowing fluid communication between (i) the discrete aperture in the first plane and the discrete aperture in the third plane and (ii) the discrete aperture in the second plane and the discrete aperture in the third plane.