Patent ID: 6537258
Filing Date: 2003-03-25
Classification: A61M,F16K,Y10T

Abstract:
A check valve for medical infusion lines, said check valve comprising:a first and a second tubular element respectively defining an upstream passageway and a downstream passageway, wherein said upstream passageway is offset in parallel with respect to said downstream passageway; a diaphragm of elastically deformable material tranversely positioned between said first and said second tubular elements and acting as a fluid seal in combination with an annular valve seat to keep the control valve normally closed, wherein a predetermined fluid pressure in said upstream passageway causes flexion of said diaphragm and the consequent opening of the valve; a plunger member offset in parallel with respect to said upstream passageway, said plunger member axially cooperating with said diaphragm and axially sliding between a retracted, inoperative position and an advanced, operative position to cause the controlled flexion of said diaphragm; and manually operable control structure for positively moving said plunger from said inoperative position to said operative position and hence cause controlled flexion of said diaphragm.