FOOT VALVE FOR DRIP CHAMBERS OF MEDICAL INFUSION OR TRANSFUSION APPARATUSES.

摘要

Foot valve (7) for drip chambers (1) of medical infusion or transfusion apparatuses, having an annular valve seat (15) with which a float obturator (11) axially displaceable between a position for closing and a position for opening the valve seat (15) cooperates. The foot valve (7) comprises a containment cage bush (8) having an elastically deformable lateral wall (9) within which the float obturator (11) floats in a guided fashion, and the lateral wall (9) of the containment bush (8) and the float (11) have respective mutually facing surfaces (14, 18) and configured such that a radial deformation of the containment bush (8) applies an axial thrust to the float obturator (11) in the direction of moving it apart from the annular valve seat (15).