US 12,403,247 B2
Drug infusion device
Cuijun Yang, Shanghai (CN)
Assigned to MEDTRUM TECHNOLOGIES INC., Shanghai (CN)
Appl. No. 17/432,096
Filed by MEDTRUM TECHNOLOGIES INC., Shanghai (CN)
PCT Filed May 17, 2019, PCT No. PCT/CN2019/087342
§ 371(c)(1), (2) Date Aug. 19, 2021,
PCT Pub. No. WO2020/232565, PCT Pub. Date Nov. 26, 2020.
Prior Publication US 2022/0339763 A1, Oct. 27, 2022
Int. Cl. A61M 5/142 (2006.01); A61B 5/00 (2006.01); A61M 5/145 (2006.01); A61M 5/158 (2006.01); A61M 5/168 (2006.01); A61M 5/172 (2006.01); A61M 5/36 (2006.01); B25B 13/46 (2006.01); B25B 21/00 (2006.01); B25B 23/00 (2006.01)
CPC A61M 5/14248 (2013.01) [A61B 5/4839 (2013.01); A61M 5/14216 (2013.01); A61M 5/1452 (2013.01); A61M 5/158 (2013.01); A61M 5/1684 (2013.01); A61M 5/16877 (2013.01); A61M 5/172 (2013.01); A61M 5/36 (2013.01); B25B 13/463 (2013.01); B25B 21/005 (2013.01); A61B 2560/0209 (2013.01); A61B 2562/043 (2013.01); A61M 2005/14208 (2013.01); A61M 2005/14252 (2013.01); A61M 2005/14268 (2013.01); A61M 2005/14533 (2013.01); A61M 2205/3317 (2013.01); A61M 2205/3576 (2013.01); A61M 2205/50 (2013.01); B25B 23/0078 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An infusion device, comprising:
a drug storage unit;
a screw, a piston and a driving wheel respectively connected with the screw, the driving wheel drives the screw to move by rotation, the piston is arranged in the drug storage unit, the screw advances the piston to move;
a driving unit cooperating with the driving wheel, the driving unit comprises more than two driving arms which drive the driving wheel to rotate, the driving unit, through multiple-mode pivot, drives the driving arms to perform a driving mechanism that uses any number of teeth and is adjustable on the driving wheel for increment-adjustable infusion; and
a power unit connected to the driving unit, the power unit exerts a force on the driving unit to lead the driving unit to perform multiple-mode pivot,
wherein the driving arms are respectively installed on two sides of the driving unit, each of the two sides of the driving unit is installed with two driving arms of the driving arms, distances between the two driving arms on each side of the driving unit become smaller along a direction towards two driving ends of the two driving arms, wherein the two driving ends of the two driving arms contact the driving wheel,
wherein the multiple-mode pivot of the driving unit includes:
after pivoting one or more steps in one direction in a single time, the driving unit starts pivoting one or more steps in another direction until an end of the pivot in this direction, the driving unit completes an alternating pivot in both directions to perform multiple-mode driving on the driving wheel.