US 12,013,050 B2
Rotary valves for dialysis systems
Jon F. Moss, Antioch, CA (US); Bert D. Egley, Walnut Creek, CA (US); Philip Scott James, Orinda, CA (US); and James Peterson, Benicia, CA (US)
Assigned to Fresenius Medical Care Holdings, Inc., Waltham, MA (US)
Filed by Fresenius Medical Care Holdings, Inc., Waltham, MA (US)
Filed on Jul. 15, 2021, as Appl. No. 17/376,845.
Application 17/376,845 is a division of application No. 16/519,106, filed on Jul. 23, 2019, granted, now 11,085,552.
Claims priority of provisional application 62/776,593, filed on Dec. 7, 2018.
Claims priority of provisional application 62/712,476, filed on Jul. 31, 2018.
Prior Publication US 2021/0341073 A1, Nov. 4, 2021
Int. Cl. F16K 31/04 (2006.01); A61M 1/14 (2006.01); A61M 1/16 (2006.01); A61M 1/36 (2006.01); F16K 37/00 (2006.01)
CPC F16K 31/047 (2013.01) [A61M 1/1524 (2022.05); A61M 1/154 (2022.05); A61M 1/155 (2022.05); A61M 1/1561 (2022.05); A61M 1/1565 (2022.05); A61M 1/1656 (2013.01); A61M 1/166 (2014.02); A61M 1/3644 (2014.02); F16K 37/0058 (2013.01); A61M 2205/128 (2013.01); A61M 2205/3303 (2013.01); A61M 2205/3317 (2013.01); A61M 2205/3331 (2013.01); A61M 2205/3368 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A dialysis fluid cassette, comprising:
a plurality of inlet fluid lines;
a plurality of outlet fluid lines;
a valve comprising:
an actuation feature by which the valve can be rotated to fluidly communicate a selected inlet fluid line of the plurality of inlet fluid lines with a selected outlet fluid line of the plurality of outlet fluid lines, and
a valve body comprising:
a first portion defining a first internal fluid conduit that can fluidly communicate the selected inlet fluid line with the selected outlet fluid line to define a fluid pathway of a plurality of fluid pathways within the dialysis fluid cassette, and
a second portion defining a second internal fluid conduit that is axially offset from the first internal fluid conduit, wherein first and second portions are positioned along a central axis of the valve, and wherein the first and second portions of the valve body are rotatable with respect to each other; and
a fluid loop that fluidly communicates the first internal fluid conduit with the second internal fluid conduit.