Liquid transfer assemblies

Claim 1

A liquid transfer assembly for enabling the transfer of liquid from a container to a syringe comprising: the syringe having a nose portion; the liquid container comprising a reservoir and defining an opening therein; a valve in said opening for selectively permitting the flow of liquid from said container to the syringe, said valve including means urging said valve to a normally closed position in which it blocks the flow of the liquid from the container to the syringe, said valve means further including means responsive to the forcible insertion of said nose portion of the syringe into said container opening to open said valve means to permit the flow of liquid from the container to the syringe, said valve having a tapered bore that forms a fit with the syringe inserted within said bore that is sufficient to retain said container on said syringe during normal use of the assembly; a flexible wall for said container adapted to collapse about the contents of said container as the liquid is withdrawn therefrom thereby causing the internal volume of said container to be maintained substantially equal to the volume of the liquid remaining in the container, and at least one continuous, non-collapsible elongate channel extending longitudinally along substantially the full length of the interior side of at least one said flexible wall surface in the direction of flow of the liquid as it is emptied from said container in normal use thereof, said at least one channel being in communication over at least most of its length with the interior of said container to thereby maintain continuous liquid flow into said syringe as the opposite wall surfaces of the container collapse in response to the emptying of said container.