Patent ID: 7011651

Claim:
A device for regulating a flow rate of an intravenous medical solution, such as Ringer's solution, specifically prepared liquid medicines, or other injectable solutions, during injection of the solution into a vein of a patient using an intravenous drip unit having a solution container containing the medical solution, a hose extending from a lower end of the container to a predetermined length, and a needle mounted to an outside end of said hose so as to inject the medical solution into the vein of the patient, said device comprising: a housing mountable to an intermediate portion of said hose, said housing having a stepped depression on a side thereof, with first and second seats formed in the stepped depression to allow the medical solution to controllably flow through the housing, said housing also having an inlet port provided at an upper portion of said first seat to communicate with the first seat, and an outlet port provided at a lower portion of said second seat to communicate with the second seat; a control member rotatably assembled with said housing to regulate the flow rate of the medical solution, said control member having a stepped boss part on a side thereof, with first and second bosses formed by the stepped boss part and seated in the first and second seats of the housing, respectively, with an arc-shaped solution path formed on an annular end surface of said first boss within an angular range of about 320°˜355°, and a radial channel formed on the annular end surface of the first boss to communicate with a first end of said solution path and extending into the second boss until the channel communicates with an end surface of the second boss; and a locking member mounting the control member to the housing while preventing undesired movement of the control member relative to the housing.