DROP COUNTER
First Claim
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, anda 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.
1 Assignment
0 Petitions
Accused Products
Abstract
A liquid flow control system for use with infusion sets of the type comprising a liquid supply, a drip chamber 8 downstream of the liquid supply for forming liquid drops and a flexible tube 7 connecting the drip chamber with an injection needle, the system comprising a drop sensor 4 adapted for being arranged adjacent the drip chamber for sensing the passage of drops through the drip chamber, a valve 19 adapted for controlling the flow of the liquid through the tube, valve activating means for activating the valve, electrical circuits for registering the rate of drop formation and controlling the valve activating means, and a battery for powering the drop sensor, the electrical circuits and the valve activating means, the drop sensor, the valve, the valve activating means, the electrical circuits and the battery being mounted on or in a common housing having housing attachment means for releasably attaching the housing to the flexible tube.
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Citations
22 Claims
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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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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- 16. A drop sensor for use in 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 drop sensor being adapted for being arranged adjacent said drip chamber for sensing the passage of drops through said drip chamber, wherein said drop sensor comprises a light beam emitter for emitting a light beam and at least two light sensors arranged for co-operating with said light beam emitter such that an alteration of said light beam by a drop in said drip chamber is sensed by at least one of said light sensors.
Specification