US 11,833,287 B2
Air trap chamber and extracorporeal circulation circuit
Shunsuke Kawamura, Makinohara (JP); and Ryo Kato, Makinohara (JP)
Assigned to NIKKISO CO., LTD., Tokyo (JP)
Appl. No. 17/049,927
Filed by NIKKISO CO., LTD., Tokyo (JP)
PCT Filed Mar. 15, 2019, PCT No. PCT/JP2019/010961
§ 371(c)(1), (2) Date Oct. 22, 2020,
PCT Pub. No. WO2019/211952, PCT Pub. Date Nov. 7, 2019.
Claims priority of application No. 2018-088658 (JP), filed on May 2, 2018.
Prior Publication US 2021/0046238 A1, Feb. 18, 2021
Int. Cl. A61M 1/36 (2006.01); B01D 19/00 (2006.01); A61M 5/36 (2006.01)
CPC A61M 1/3638 (2014.02) [B01D 19/0031 (2013.01); A61M 1/3627 (2013.01); A61M 5/36 (2013.01); A61M 2205/75 (2013.01); A61M 2205/7545 (2013.01); A61M 2206/16 (2013.01); B01D 19/0057 (2013.01)] 3 Claims
OG exemplary drawing
 
1. An air trap chamber comprising:
a chamber body that has a substantially cylindrical shape, has an inlet pipe at one end with respect to a direction of a central axis of the chamber body and an outlet at another end, and in which a liquid flows down from the inlet pipe to the outlet downward, wherein
the inlet pipe is extended into the chamber body and an inlet, an end opening of the inlet pipe, is provided at an inner circumferential surface of the chamber body and faced in a circumferential direction,
a filter covering the outlet is provided in the chamber body,
the filter includes:
a cylindrical section that surrounds the outlet and extends in the direction of the central axis of the chamber body,
a ceiling section that covers an upper end of the cylindrical section, the upper end opposite to a lower end of the chamber body, the lower end being adjacent to the outlet,
the cylindrical section of the filter has openings in multiple stages aligned in the direction of the central axis,
a circumferential width of one of the openings in an upper stage of the multiple stages adjacent to the ceiling section of the filter is made larger than a circumferential width of another opening in a lower stage of the multiple stages adjacent to the outlet,
the filter is provided with multiple ribs that extend in the direction of the central axis of the chamber body and are aligned along the circumferential direction, and
the multiple ribs include:
a first rib that extends from a lower end of the filter to the ceiling section of the filter; and
a second rib that extends from the lower end of the filter and terminates before reaching the ceiling section of the filter.