Patent ID: 7918834
Filing Date: 2011-04-05
Classification: A61M

Abstract:
1. A liquid flow control system for use with infusion sets of the type comprising a liquid supply, a drip chamber downstream of the liquid supply for forming liquid drops and a flexible tube connecting said drip chamber with an injection needle, said system comprising: a drop sensor adapted for being arranged adjacent said drip chamber for sensing the passage of drops through said drip chamber, a valve adapted for controlling the flow of said liquid through said tube, valve activating means for activating said valve, electrical circuits for registering the rate of drop formation and controlling said valve activating means, and a battery for powering said drop sensor, said electrical circuits and said valve activating means, wherein said drop sensor, said valve, said valve activating means, said electrical circuits and said battery are mounted on or in a common housing having housing attachment means for releasably attaching said housing to said flexible tube, and wherein said housing comprises length adjustable carrier means for carrying said drop sensor, said length adjustable carrier means comprising two generally rectilinear and mutually parallel, telescopically extendable and retractable rods or arms.