Flow rate regulator for liquid medicine or blood transfusion...

Details Flow rate regulator for liquid medicine or blood transfusion... Flow rate regulator for liquid medicine or blood transfusion...

A - Human Necessities

61

M

137/139

A61M 5/00 (2006.01)

Patent

CA 1308333

ABSTRACT OF THE DISCLOSURE 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

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