US 12,214,162 B2
Infusion pump with valve compensation
Boaz Eitan, Hofit (IL); Amir Rasowsky, Yakir (IL); Gidi Pesach, Kfar Vitkin (IL); and Ram Shtoltz, Givatayim (IL)
Assigned to EITAN MEDICAL LTD., Netanya (IL)
Appl. No. 17/433,388
Filed by EITAN MEDICAL LTD., Netanya (IL)
PCT Filed Mar. 4, 2020, PCT No. PCT/IL2020/050246
§ 371(c)(1), (2) Date Aug. 24, 2021,
PCT Pub. No. WO2020/178824, PCT Pub. Date Sep. 10, 2020.
Claims priority of provisional application 62/813,897, filed on Mar. 5, 2019.
Prior Publication US 2022/0054745 A1, Feb. 24, 2022
Int. Cl. A61M 5/168 (2006.01); A61M 5/142 (2006.01); A61M 5/14 (2006.01)
CPC A61M 5/16881 (2013.01) [A61M 5/14216 (2013.01); A61M 5/16854 (2013.01); A61M 2005/1406 (2013.01); A61M 2205/332 (2013.01); A61M 2205/3334 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An infusion pump comprising:
a plunger configured to squeeze a section of an infusion tube;
a proximal valve located proximally to said plunger, said proximal valve configured to:
ascend and thereby allow infusion fluid intake from a reservoir to the infusion tube, and
descend and thereby inhibit infusion fluid intake from the reservoir to the infusion tube;
a distal valve located distally to said plunger, said distal valve configured to:
ascend and thereby allow infusion fluid flow past the distal valve, and
descend and thereby inhibit infusion fluid flow past the distal valve; and
a controller configured to control said plunger, said proximal valve, and said distal valve and thereby, to control infusion fluid intake from the reservoir and infusion fluid delivery to a subject,
wherein controlling delivery of infusion fluid to the subject comprises initiating descending of said plunger prior to the ascending of said distal valve, such that the descending of said plunger compensates for suction produced by the ascending of said distal valve, thereby reducing backflow of fluid from the subject.