US 12,253,078 B2
Pressure-pump cartridge and pressure pump
Hongyan Jin, Nanjing (CN); Hui Liu, Nanjing (CN); Jinwei Pang, Nanjing (CN); Derong Leng, Nanjing (CN); Changqing Li, Nanjing (CN); Jiefeng Xi, Nanjing (CN); Ning Li, Nanjing (CN); Chunjun Liu, Nanjing (CN); Zhi Tang, Nanjing (CN); and Jianyu Wei, Nanjing (CN)
Assigned to MICRO-TECH (NANJING) CO., LTD., Nanjing (CN)
Filed by MICRO-TECH (NANJING) CO., LTD., Nanjing (CN)
Filed on Jun. 16, 2022, as Appl. No. 17/842,696.
Application 17/842,696 is a continuation of application No. PCT/CN2020/088315, filed on Apr. 30, 2020.
Claims priority of application No. 201911377484.0 (CN), filed on Dec. 27, 2019.
Prior Publication US 2022/0316471 A1, Oct. 6, 2022
Int. Cl. F04B 53/16 (2006.01); A61M 5/14 (2006.01); A61M 5/145 (2006.01); F04B 5/02 (2006.01); F04B 9/113 (2006.01); F04B 53/00 (2006.01); F04B 53/14 (2006.01)
CPC F04B 53/162 (2013.01) [A61M 5/1413 (2013.01); A61M 5/14566 (2013.01); F04B 5/02 (2013.01); F04B 9/113 (2013.01); F04B 53/00 (2013.01); F04B 53/143 (2013.01); A61M 2205/123 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A pressure-pump cartridge, including a cylinder, wherein the cylinder has a first chamber, a piston chamber and a second chamber that are in communication in sequence; and the cylinder has a first inner wall corresponding to the first chamber and a second inner wall corresponding to the second chamber; the first inner wall is provided with a first liquid inlet and a first liquid outlet, and the second inner wall is provided with a second liquid inlet and a second liquid outlet; and
the piston chamber is configured to be in sealing fit with a piston; an end of the first chamber remote from the piston chamber has a first opening which is configured for entry of the piston, the first chamber is configured to be in clearance fit with the piston,
wherein the pressure-pump cartridge further comprises a first sealing structure disposed at the first opening, the first sealing structure is connected with the cylinder to close the first opening, and the first sealing structure comprises a first connecting member and a first sealing member connected to the first connecting member,
wherein the first sealing member is located within the first chamber to close the first opening, and the first connecting member is fixedly connected to the cylinder, and
wherein the first sealing structure also has a through hole for a piston rod to pass through, the through hole is provided to pass through the first connecting member and the first sealing member, the first sealing member is in sealing fit with the piston rod,
wherein the pressure-pump cartridge further comprises a fastener, the cylinder is provided with a first connecting hole, and the first connecting member is provided with a second connecting hole, the fastener fits with both the first connecting hole and the second connecting hole, so as to fix the first connecting member to the cylinder.