Patent ID: 7690396

Claim:
A flow control valve for medical liquid comprising: a housing including an inlet, an outlet, and a flow path therebetween; a plurality of flow restrictors in the flow path to define a plurality of flow streams of differing flow rates; a flow control member disposed in the flow path, the flow control member having a plurality of discrete apertures in a first plane and at least one aperture in a second plane spaced apart from the first plane and at least one aperture in a third plane spaced apart from the first plane and second plane, the flow control member and housing being relatively movable between a first position in which one of the plurality of apertures in the first plane is in communication with one of the flow streams to define a first flow rate through the valve, and a second position in which one of the at least one aperture in the second plane is in communication with a different one of the flow streams to define a second flow rate through the valve different from the first flow rate, the flow control member being configured with an annular groove such that the at least one aperture in the third plane is in communication with the outlet in both the first and second positions.