ONE-WAY VALVE FOR MEDICAL INFUSION LINES AND THE LIKE
First Claim
1. A one-way valve for medical infusion lines and the like, comprisinga first tubular element and a second tubular element, which define, respectively, a passage upstream and a passage downstream which are coaxial to one another and transversely set between which is a diaphragm made of elastically deformable material co-operating in a fluid-tight way with an annular valve seat of said first tubular element to keep said valve normally closed,wherein a predetermined pressure of fluid in said passage upstream brings about a displacement or an elastic deformation of said diaphragm and consequent opening of said valve;
- said annular valve seat defined by a wall with a conical surface of said first tubular element diverging towards said second tubular element;
said diaphragm comprising an end wall of a cup-shaped element having an outer peripheral edge, said outer edge normally pressed in sealed contact against said annular valve seat under an axial thrust exerted by a side wall of said cup-shaped elementwherein a deflection or an axial displacement of said end wall of the cup-shaped element is-brought about in use by said predetermined pressure of fluid determining a radial contraction of said outer peripheral edge and a consequent separation of said outer edge from said annular valve seatwherein said side wall of the cup-shaped element has a free edge resting against a grooved transverse surface of said second tubular element communicating with said passage downstream, wherein said free edge of the side wall of said cup-shaped element is set resting against said grooved transverse surface of said second tubular element in regions corresponding to a plurality of angular portions angularly separated by angular non-resting portions.
1 Assignment
0 Petitions
Accused Products
Abstract
A check valve for medical infusion lines and the like, includes a diaphragm made of elastic material set between a first tubular connector and a second tubular connector. The diaphram includes an end wall of a cup-shaped element, having an outer peripheral edge of which is normally pressed in seal contact against an annular valve seat with a conical surface of the first tubular connector under an axial thrust exerted by a side wall of the cup-shaped element. A free edge of the side wall of the cup-shaped element is set resting against a transverse surface of the second tubular connector only in regions corresponding to angular portions of the latter separated by non-resting angular portions.
86 Citations
11 Claims
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1. A one-way valve for medical infusion lines and the like, comprising
a first tubular element and a second tubular element, which define, respectively, a passage upstream and a passage downstream which are coaxial to one another and transversely set between which is a diaphragm made of elastically deformable material co-operating in a fluid-tight way with an annular valve seat of said first tubular element to keep said valve normally closed, wherein a predetermined pressure of fluid in said passage upstream brings about a displacement or an elastic deformation of said diaphragm and consequent opening of said valve; -
said annular valve seat defined by a wall with a conical surface of said first tubular element diverging towards said second tubular element; said diaphragm comprising an end wall of a cup-shaped element having an outer peripheral edge, said outer edge normally pressed in sealed contact against said annular valve seat under an axial thrust exerted by a side wall of said cup-shaped element wherein a deflection or an axial displacement of said end wall of the cup-shaped element is-brought about in use by said predetermined pressure of fluid determining a radial contraction of said outer peripheral edge and a consequent separation of said outer edge from said annular valve seat wherein said side wall of the cup-shaped element has a free edge resting against a grooved transverse surface of said second tubular element communicating with said passage downstream, wherein said free edge of the side wall of said cup-shaped element is set resting against said grooved transverse surface of said second tubular element in regions corresponding to a plurality of angular portions angularly separated by angular non-resting portions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification