Anti-reflux device for urinary collection bags

Claim 1

An anti-reflux device for a body fluid collection bag comprising: at least two flexible walls of a plastic material joined together at the peripheral edges thereof, one of said at least two walls having an opening on an upper portion thereof; a tubular inlet connector comprising a back support and a tubular elbow portion attached thereto, said elbow portion having a generally circular opening therein that coincides with said opening on said wall, said circular opening being constructed so that fluids flowing therethrough will be concentrated at the lowermost portion thereof, said connector being secured to the exterior of said wall so that said circular opening is aligned with said wall opening; a drainage tube for transporting body fluids to said bag being attached to said tubular inlet connector; and, a flap valve consisting of a sheet of thin flexible material having substantially the same configuration as said back support and being secured to the interior of said wall having the opening thereon so as to substantially coincide with the outline of said inlet connector, said flap valve being secured in a manner that leaves only its lower periphery unsecured and free to flex inwardly toward said bag interior when fluid passes therethrough but to close when the bag pressure exceeds the drainage tube pressure, said lower periphery covering the lowest portion of said circular opening and extending slightly below it.