Rigid casing for dialyzer coil

Claim 1

A dialyzer of the type useful in artificial kidney machines comprising a generally cylindrical inner core member, a dialyzer coil positioned therearound, and a rigid outer casing enclosing the dialyzer coil, the inner core member including dialysis inflow castellations around its lower end and dialysis outflow castellations around its upper end, and a lateral baffle wall to prevent dialysing fluid from flowing through the core and direct the fluid to flow through the inflow castellations to the dialyzer coil, the rigid casing consisting essentially of two pieces including an upper end cap and a lower end cap, each end cap being generally cup-shaped and proportioned for mating engagement with each other at their rim portions and sealed together therearound, the conical sidewall portion of each end cap tapering inwardly from its rim portion to its base portion at an angle so slight as to give the appearance of generally cylindrical walls and to properly control the lateral dimensional features of the dialyzer coil during operation, the base portion of the lower end cap having a downwardly extending central flange adapted for engagement with a dialysis inflow opening of an artificial kidney machine to position the dialyzer thereon and provide for flow of dialyzing fluid into the dialyzer, the base portion of the upper end cap having aperture means to provide for flow of dialyzing fluid out of the dialyzer in cooperation with the outflow castellations around the upper end of the inner core member.