| 摘要 |
A flow rate regulator comprising a first cylindrical member, a second cylindrical member and a disc-shaped member to regulate a flow rate of liquid flowing through a transfusion unit. The liquid is introduced into the second cylindrical member via an inlet port. It flows through the disc-shaped member via a through hole and flows further along a peripherally extending groove in the first cylindrical member. Then, it is discharged from the first cylindrical member via an outlet port after a flow rate is regulated as required. The disc-shaped member is fitted in the second cylindrical member so as not to be rotated relative to the latter and the sub-assembly is fitted in the first cylindrical member. The peripherally extending groove is so designed that its cross-sectional area is gradually varied on the bottom portion of the first cylindrical member. The through hole in the disc-shaped member is communicated with the peripherally extending groove. A position where the through hole in the disc-shaped member is communicated with the peripherally extending groove in the first cylindrical member is varied by rotating the first cylindrical member so that a cross-sectional area of the peripherally extending groove is varied correspondingly. This allow a flow rate of the liquid flowing through the regulator to be adjusted as required. 18 |
