One-way valve

In a one-way valve assembly for use with a container supplying a fluid under a pressure to a channel, said one-way valve assembly including a first tube for communicating said fluid into said channel, a valve, and a second tube communicating with said container and transmitting said fluid to said first tube via said valve, said valve comprising:

• a base member having a hollow interior and a sealed distal end, said hollow interior being capable of communicating said fluid between said first tube and said second tube through at least one slit aperture adjacent to said sealed distal end;
• a flexible pressure-responsive surface covering said at least one slit aperture, said flexible pressure responsive surface engaging with said base member, thereby sealing said slit aperture to prevent a flow of fluid from said first tube into said base member when said pressure falls below a predetermined value, and unsealing said slit aperture when said pressure exceeds the predetermined value wherein said base member comprises a distal trunconical part having a tip and a side surface, a second cylindrical part located at a proximal end of said base, and a first cylindrical part connecting said distal trunconical part with said second cylindrical part, said slit aperture being disposed on said side surface, said first cylindrical part having an outer surface capable of frictionally engaging an inner proximal part of said first tube, said second cylindrical part having an inner surface capable of frictionally engaging an outer surface of said second tube at a distal end thereof.

In a one-way valve assembly for use with a container supplying a fluid under a pressure to a blood vessel, said medical fluid infusion assembly including a first tube for communicating said fitted into said blood vessel, a one-way valve, and a second tube communicating with said container and transmitting said fluid to said first tube via said one-way valve, said one-way valve comprising:

• a base member capable of communicating said fluid between said first and second tube, wherein said base member is constituted by a distal trunconical part having a tip and a side surface, a second cylindrical part located at a proximal end of said base, and a first cylindrical part connecting said distal trunconical part with said second cylindrical part, a slit aperture being disposed on said side surface, said first cylindrical part having an outer surface capable of frictionally engaging an inner proximal part of said first tube, said second cylindrical part having an inner surface capable of frictionally engaging an outer surface of said second tube at a distal end thereof;
• a flexible pressure-responsive surface covering said at least one slit aperture, said flexible pressure responsive surface engaging with said base member, thereby sealing said slit aperture to prevent a flow of fluid from said first tube into said base member when said pressure falls below a predetermined value, and unsealing said slit aperture when said pressure exceeds the predetermined value.