Abstract: An anesthesia system includes a main unit (10) for supplying anesthetic gas and providing artificial respiration, an induction chamber (20) for receiving a small animal and for introducing the anesthetic gas, an anesthetic gas treatment section (30) connected to the induction chamber (20) and a breathing circuit tube (50) having an intubation portion (53). The main unit (10) has a first outlet port (10a), a second outlet port (10c), a return port (10b) and a communication passage (17) connecting the return port and the second outlet port. The anesthetic gas exiting through the first outlet port (10a) is conveyed through the breathing circuit tube (50) to return to the return port (10b) and further conveyed through the communication passage (17), the second outlet port (10c) and a supply tube (60) into the induction chamber (20).

Abstract: Catalytic converter for purifying the exhaust gases of internal combustion engines comprising a cylindrical shell comprising a pair of half shells which form an inlet chamber, a catalyst chamber, and an outlet chamber, a catalyst element provided in the catalyst chamber, a cylindrical sealing member provided in the inlet chamber, and a damper member provided between the cylindrical shell and the sealing member. The sealing member engages to the cylindrical shell for sealing the gap between the cylindrical shell and the catalyst element.

Abstract: Apparatus for purifying the exhaust gases of internal combustion engines comprising a pair of upstream exhaust pipes, a catalytic converter, and a downstream exhaust pipe. The catalytic converter comprises a cylindrical shell having an inlet chamber, a catalyst chamber, an outlet chamber, and a monolithic catalyst element in the catalyst chamber. The inlet chamber has inlet ports communicating with the upstream exhaust pipes respectively and axial lines of the inlet ports cross each other in the inlet chamber. In the inlet chamber, a diffusion means is provided to diffuse the exhaust gas for uniformly distributing it to the catalyst element.