Patent ID: 11921021
Assignee: KABUSHIKI KAISHA TOSHIBA
Field: Measurement (Instruments)
Classification: CPC G | IPC A  B  C  G

Claim 21:
22. A gas concentration device comprising:
a first container that includes a first space surrounded by a first partition wall and stores a specimen, and a pressure inside the first space is reduced;
a second container that is connected to the first container by a first path and has a second space surrounded by a second partition wall and configured to store a gas flowing in from the first space;
a pressure control device configured to reduce a volume of the second space; and
a second path through which a gas inside the second space is discharged,
wherein the pressure control device further includes a fourth partition wall that is provided inside the second space and has a bag-like shape with an open vent, and a pump that is connected to the vent and takes in and out a fluid between outside of the second space and inside of the fourth partition wall.