Microbe-barrier drainage device

Claim 2

A microbe barrier device particularly useful for draining body liquids while avoiding retrograde infection, comprising: a housing including an inlet connectable to a liquid line and an outlet through which the liquid from the line is drained; a one-way valve within the housing between its inlet and outlet and permitting the one-way flow of the liquid only from the inlet to the outlet; and a barrier within the housing between its inlet and the one-way valve and including an antiseptic substance in contact with all surfaces of the inlet side of the valve through which the liquid flows, said one-way valve comprising an elastomeric membrane secured within the housing and partitioning its interior into an upper inlet chamber communicating with the housing inlet, and a lower outlet chamber communicating with the housing outlet; said membrane being formed with a central pocket at its lower end which pocket is slitted to permit liquid flow only from the inlet chamber to the outlet chamber; said barrier being disposed within said pocket in contact with all the slit edges of the membrane.

Claim 3

A device according to claim 1, wherein said barrier comprises a sponge impregnated with said antiseptic substance.

Claim 4

A device according to claim 1, wherein said housing includes two sections secured together, one section being formed with the housing inlet and the other section being formed with the housing outlet, the outer periphery of said membrane being secured between said two housing sections.

Claim 5

A microbe barrier device particularly useful for draining body liquids while avoiding retrograde infection, comprising: a housing including an inlet connectable to a liquid line and an outlet through which the liquid from the line is drained; a one-way valve within the housing between its inlet and outlet and permitting the one-way flow of the liquid only from the inlet to the outlet; and a barrier within the housing between its inlet and the one-way valve and including an antiseptic substance in contact with all surfaces of the inlet side of the valve through which the liquid flows, whrein said barrier is of annular shape and is disposed around the complete cicumference of the inner face of the housing adjacent its inlet; said one-way valve comprisig a resilient conical member of smaller diameter than the inner face of the housing wall so as to be slightly spaced therefrom, said conical member being supported by a stem such that the upper face of the conical member is normally in light contact with the lower edge of the barrier but is displaceable therefrom by a liquid entering the housing inlet to permit the flow of said liquid between the annular barrier and the conical member to the housing outlet.

Claim 6

A microbe barrier device particularly useful for draining body liquids while avoiding retrograde infection, comprising: a housing including an inlet connectable to a liquid line and an outlet through which the liquid from the line is drained; a one-way valve within the housing between its inlet and outlet and permitting the one-way flow of the liquid only from the inlet to the outlet; and a barrier within the housing between its inlet and the one-way valve and including an antiseptic substance in contact with all surfaces of the inlet side of the valve through which the liquid flows, whrein said barrier is of annular shape and is disposed around the complete cicumference of the inner face of the housing adjacent its inlet; said one-way valve comprisig a resilient conical member of smaller diameter than the inner face of the housing wall so as to be slightly spaced therefrom, said conical member being supported by a stem such that the upper face of the conical member is normally in light contact with the lower edge of the barrier but is displaceable therefrom by a liquid entering the housing inlet to permit the flow of said liquid between the annular barrier and the conical member to the housing outlet.

Claim 7

A device according to claim 4, wherein said housing includes an annular wall coaxial with, and spaced axially inwardly of, the housing inlet, but terinating short of the conical member; said annular barrier being disposed in the space between the housing and said annular wall with its upper portion shielded by said wall, and its lower edge in contact with the conical member.