Hemodialysate blending system

Details Hemodialysate blending system Hemodialysate blending system

1977-06-08

1979-01-30

Tollberg, Stanley H.

Fluid handling

Self-proportioning or correlating systems

Self-proportioning flow systems

222 47, 222 64, 222137, 222145, 417503, B67D 552

Patent

active

041367081

ABSTRACT:
A system for preparation of variable hemodialysate in which a controllable pump meters multiple fluid sources of dialysate concentrates and water in controlled proportion. The system includes a plurality of cylinder and piston pump assemblies linked together for simultaneous operation. Individual valves connect the separate pump assemblies to the individual fluid sources to be proportioned. A position sensor provides signals indicative of the position of the pistons throughout their stroke cycle, and with a control operates the control valves associated with the individual pump assemblies in accord with functions of piston position and preselected proportioning control inputs, so as to control the volume of fluid metered by each of the pumps during the pump stroke.

REFERENCES:
patent: 3499387 (1970-03-01), Zippel
patent: 3605783 (1971-09-01), Pecker et al.
patent: 3672389 (1972-06-01), McConnell
patent: 3690340 (1972-09-01), Sipin
patent: 4031912 (1977-06-01), Lu et al.

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