Patent ID: 8858513

Claim:
A disposable intravenous flow control device ( 20 ) comprising: a rigid casing ( 21 ) defining a flow passage having a fluid entrance ( 23 ) and a fluid exit ( 22 ); a flow regulator ( 30 , 30 A, 30 B) disposed in the flow passage of the casing ( 21 ) and comprising a disc-shaped upper float member ( 31 ) including a bottom outer rim ( 310 ), a plurality of equally spaced teeth ( 311 ) along an annular top edge, and a bottom inner rim ( 312 ); and a disc-shaped lower float member ( 32 ) including an annular flange ( 321 ) adjacent to an edge and extending upward, a solid cylinder ( 323 ) on the center of a top hollow riser ( 326 ), a plurality of equally spaced teeth ( 324 ) along the edge and below the flange ( 321 ), and a hollow cylindrical skirt ( 322 ) extending downward from the hollow riser ( 326 ) wherein the cylinder ( 323 ) is fitted in the inner rim ( 312 ) to secure the upper and lower float members ( 31 , 32 ) together, and the outer rim ( 310 ) is securely engaged around the flange ( 321 ) so as to define a closed space (B) in the flow regulator ( 30 ); and a suction cup ( 15 , 15 A, 15 B) releasably secured to the skirt ( 322 ) for blocking the fluid exit ( 22 ) when fluid in the casing ( 21 ) is consumed.