US 12,220,554 B2
Connection member, injection device and pump casing equipped with connection member, and liquid verification method using connection member
Masayuki Uruma, Osaka (JP); and Kazuki Ishibashi, Osaka (JP)
Assigned to DAIKEN MEDICAL CO., LTD., Osaka (JP)
Appl. No. 17/273,084
Filed by DAIKEN MEDICAL CO., LTD., Osaka (JP)
PCT Filed Aug. 28, 2019, PCT No. PCT/JP2019/033791
§ 371(c)(1), (2) Date Mar. 3, 2021,
PCT Pub. No. WO2020/054433, PCT Pub. Date Mar. 19, 2020.
Claims priority of application No. 2018-169671 (JP), filed on Sep. 11, 2018.
Prior Publication US 2021/0268256 A1, Sep. 2, 2021
Int. Cl. A61M 39/12 (2006.01); A61M 5/142 (2006.01); A61M 39/10 (2006.01)
CPC A61M 39/12 (2013.01) [A61M 5/14224 (2013.01); A61M 39/1011 (2013.01); A61M 2039/1005 (2013.01); A61M 2205/14 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A connection member to be provided between a pump for pressurizing and feeding liquid and a suction tube for connecting a suction port of the pump with the suction tube, and between the pump and a discharge tube for connecting a discharge port of the pump with the discharge tube, comprising:
a casing main body; and
a tube connecting part, wherein
the casing main body includes a pump attachment part and a flow passage defining part,
the pump attachment part includes an upper surface provided with a suction opening for connection with the suction port which opens in a bottom wall of the pump and a discharge opening for connection with the discharge port which opens in the bottom wall of the pump, the pump attachment part being configured to be attached with the pump on the upper surface of the pump attachment part in a state in which the suction port is connected to the suction opening and the discharge port is connected to the discharge opening,
the tube connecting part is attached to the casing main body in front of a front surface of the casing main body,
the tube connecting part includes a suction connecting section for connecting to the suction tube and a discharge connecting section for connecting to the discharge tube,
the suction connecting section and the discharge connecting section have respective tube connecting ports where the suction tube and the discharge tube are to be respectively inserted and then fixed in a front of the tube connecting part,
the flow passage defining part includes a suction passage section and a discharge passage section, the suction passage section connecting the suction opening of the pump attachment part and the suction connecting section of the tube connecting part with each other so as to flow the liquid between the suction opening and the suction connecting section, and the discharge passage section connecting the discharge opening of the pump attachment part and the discharge connecting section of the tube connecting part with each other so as to flow the liquid between the discharge opening and the discharge connecting section,
at least a portion of the suction passage section includes a first membrane, at least a portion of the discharge passage section includes a second membrane, the first and second membranes being deformable due to pressure of the liquid flowing in the suction passage section and the discharge passage section, respectively, and
the flow passage defining part has a shape which allows the flow passage defining part to be attached to a sensor for detecting a flow state of the liquid flowing in the suction passage section and the discharge passage section by deformation of at least one of the first and second membranes in an arrangement in which the first and second membranes face the sensor.