US 11,707,565 B2
Medical pump
René Richter, Tharandt (DE); Sebastian Pech, Dresden (DE); and Jens Lienig, Berlin (DE)
Assigned to Sanofi, Paris (FR)
Appl. No. 16/755,367
Filed by SANOFI, Paris (FR)
PCT Filed Oct. 19, 2018, PCT No. PCT/EP2018/078684
§ 371(c)(1), (2) Date Apr. 10, 2020,
PCT Pub. No. WO2019/077097, PCT Pub. Date Apr. 25, 2019.
Claims priority of application No. 17306415 (EP), filed on Oct. 19, 2017.
Prior Publication US 2021/0252214 A1, Aug. 19, 2021
Int. Cl. A61M 5/142 (2006.01)
CPC A61M 5/14216 (2013.01) [A61M 2205/3327 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A medical pump for dispensing a liquid, the medical pump comprising:
a housing comprising an inlet for receiving the liquid and a first outlet for dispensing the liquid;
a receptacle comprising a chamber and a passage that is in fluid communication with the chamber, wherein the receptacle is received in the housing and is axially movable relative to the housing from a filling position in which the passage fluidly communicates the chamber with the inlet to a first dispensing position in which the passage fluidly communicates the chamber with the first outlet; and
a piston that is received in the chamber and is configured such that, when the receptacle is in the filling position, the piston is axially moveable relative to the receptacle to draw the liquid from the inlet into the chamber, and when the receptacle is in the first dispensing position, the piston is axially moveable relative to the receptacle to dispense the liquid in the chamber through the first outlet,
wherein the piston and an end wall of the receptacle are configured to be spaced apart by a substantially constant distance as the receptacle moves to the filling position and as the receptacle moves to the first dispensing position,
wherein the housing further comprises a second outlet, wherein the receptacle is axially movable relative to the housing to a second dispensing position in which the passage fluidly communicates the chamber with the second outlet,
wherein the piston is configured such that when the receptacle is in the second dispensing position, the piston is axially moveable relative to the receptacle to dispense the liquid contained in the chamber through the second outlet, and
wherein the medical pump further comprises a detection mechanism configured to:
determine whether contents of the chamber fulfil a predetermined compression property requirement,
move the receptacle to the second dispensing position, and then
move the receptacle and the piston relative to each other to dispense the liquid in the chamber through the second outlet if the predetermined compression property requirement is not fulfilled.
 
17. A method of operating a medical pump, the medical pump comprising a housing having an inlet and a first outlet, a receptacle having a chamber and a passage that is in fluid communication with the chamber, and a piston that is received in the chamber, the method comprising:
providing the receptacle in a filling position within the housing in which the passage fluidly communicates the chamber with the inlet;
moving the piston axially relative to the receptacle to draw liquid into the chamber from the inlet while the receptacle is in the filling position;
moving the receptacle axially relative to the housing to a first dispensing position in which the passage fluidly communicates the chamber with the first outlet; and
moving the piston axially relative to the receptacle to dispense the liquid in the chamber through the first outlet while the receptacle is in the first dispensing position,
wherein the piston and an end wall of the receptacle are spaced apart by a substantially constant distance as the receptacle moves to the filling position and as the receptacle moves to the first dispensing position,
wherein the housing further comprises a second outlet, wherein the receptacle is axially movable relative to the housing to a second dispensing position in which the passage fluidly communicates the chamber with the second outlet,
wherein the piston is configured such that when the receptacle is in the second dispensing position, the piston is axially moveable relative to the receptacle to dispense the liquid contained in the chamber through the second outlet, and
wherein the medical pump further comprises a detection mechanism configured to:
determine whether contents of the chamber fulfil a predetermined compression property requirement,
move the receptacle to the second dispensing position, and then
move the receptacle and the piston relative to each other to dispense the liquid in the chamber through the second outlet if the predetermined compression property requirement is not fulfilled.