US 12,377,210 B2
Pump
Do Kyung Lee, Hwaseong-si (KR); Joon Sung Jeon, Yongin-si (KR); and Young Wook Chang, Seoul (KR)
Assigned to IPV, Seoul (KR)
Filed by IPV, Seoul (KR)
Filed on Aug. 11, 2023, as Appl. No. 18/232,888.
Application 18/232,888 is a continuation of application No. PCT/KR2022/002094, filed on Feb. 11, 2022.
Claims priority of application No. 10-2021-0026314 (KR), filed on Feb. 26, 2021.
Prior Publication US 2023/0381409 A1, Nov. 30, 2023
Int. Cl. F04B 43/04 (2006.01); A61M 5/142 (2006.01); A61M 5/145 (2006.01); A61M 5/172 (2006.01); F04B 53/14 (2006.01); A61M 5/158 (2006.01)
CPC A61M 5/14586 (2013.01) [A61M 5/14224 (2013.01); A61M 5/14248 (2013.01); A61M 5/1723 (2013.01); F04B 43/04 (2013.01); F04B 53/143 (2013.01); A61M 2005/14252 (2013.01); A61M 2005/1585 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A pump comprising:
a housing having a shaft hole;
a membrane assembly disposed inside the housing; and
a shaft assembly mounted on the housing,
wherein the shaft assembly includes:
a shaft inserted into the shaft hole; and
a sealing member disposed on an end portion of the shaft and having a plurality of contact regions on an inner surface of the housing along a longitudinal direction of the shaft,
wherein the sealing member includes:
a body into which the shaft is inserted, and having a concave surface disposed forward in an axial direction of the shaft;
a first protrusion protruding from the body in a radial direction of the shaft;
a first groove disposed between the body and the first protrusion and having a first depth;
a second protrusion disposed on a side opposite to the first protrusion; and
a second groove disposed between the body and the second protrusion and having a second depth to be different from the first depth; and
wherein the shaft includes:
a first supporter disposed inside the sealing member and extending in a radial direction; and
a second supporter disposed outside the sealing member and supporting the body of the sealing member.