US 12,296,142 B2
Opening/closing unit drive mechanism for chemical-liquid circuit, and chemical-liquid injector
Shigeru Nemoto, Tokyo (JP); Yumiko Fukikoshi, Tokyo (JP); Jun Ueki, Yokohama (JP); and Yasufumi Saitoh, Tokyo (JP)
Assigned to Circulus Inc., Tokyo (JP)
Appl. No. 17/310,156
Filed by Circulus Inc., Tokyo (JP)
PCT Filed Jan. 29, 2020, PCT No. PCT/JP2020/003277
§ 371(c)(1), (2) Date Jul. 21, 2021,
PCT Pub. No. WO2020/158830, PCT Pub. Date Aug. 6, 2020.
Claims priority of application No. 2019-013683 (JP), filed on Jan. 29, 2019.
Prior Publication US 2022/0054736 A1, Feb. 24, 2022
Int. Cl. A61M 5/145 (2006.01); A61M 5/168 (2006.01)
CPC A61M 5/145 (2013.01) [A61M 5/168 (2013.01); A61M 2205/587 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A drive mechanism of a chemical-liquid circuit, comprising:
a holder;
an engaging portion disposed so as to leave a space from holder; and
a linear motion mechanism configured to move the engaging portion back and forth,
wherein the holder is configured to detachably hold an opening/closing unit, the opening/closing unit includes a housing and at least one piston, the housing has a flow channel for a chemical liquid, the piston has on one end thereof a head having a flange shape spread outward in a radial direction, and the piston is movably held in the housing so as to open and close the flow channel with the head protruding from the housing, and
wherein the engaging portion has a hook which engages with the piston, wherein the hook has a receiving portion to which the head engages.