(57) A device for regulating the flow rate of a liquid in a medical infusion line, said
device (1) comprising a body (2) presenting elements (40, 59) for its connection to
a first and to a second conduit connected to a container of said liquid and directed
to a patient respectively, the body (2) presenting a plurality of parts (3, 4) connected
together but torsionally free about a common axis of rotation (K) to enable flow rate
variation means (54, 55, 67), associated with the body (2), to modify the flow rate
of the liquid fed to the patient. The flow rate variation means are a plurality of
recesses (54, 55, 67) provided in a single part (4) of said body (2), a first recess
(54) being annular and of constant depth, and at least one second recess (55, 67)
being in the form of a broken ring and of variable depth, said recesses (54, 55, 67)
being concentric.
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