Flow controllers for fluid infusion sets
First Claim
1. An in line fluid flow controller for use with a fluid administration set for infusion of fluid into the body of a patient, the administration set including a means for connecting the administration set to a reservoir of fluid, said connecting means being connected to a supply line having the flow controller therein, said fluid flow controller comprising:
- a housing having a chamber therein,an inlet to and an outlet from said chamber,a plurality of feed passages within said housing, said passages being in fluid communication with said inlet, each feed passage having a flow restrictor therein which includes at least one orifice configured to control the rate of fluid therethrough so that the fluid flow is at a predetermined constant flow rate,a flow rate selector disposed within the chamber and including a transfer passage, the selector being movable so that the transfer passage can be in communication with one or a selected number of said feed passages, said transfer passage being in communication with the outlet and the arrangement being such that a predetermined flow rate of fluid can be selected by the number of feed passages in communication with the transfer passage as a result of movement of said selector.
1 Assignment
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Accused Products
Abstract
An in-line fluid flow controller (5) for use with a fluid administration set (1) for infusion of fluid into the body of a patient, the administration set comprising a reservoir of fluid connected to a supply line (2) having a discharge orifice; characterized in that the fluid flow controller comprises a housing (11) having a chamber therein, and inlet (13) to and an outlet (14) from said chamber, said housing being adapted to receive therewithin at least one flow restrictor (12) each having an orifice (18) or orifices configured to control the rate of fluid flow therethrough and into the body of a patient such that the fluid is infused into a patient at a predetermined constant flow rate or at a flow rate within predetermined limits via said discharge orifice.
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Citations
16 Claims
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1. An in line fluid flow controller for use with a fluid administration set for infusion of fluid into the body of a patient, the administration set including a means for connecting the administration set to a reservoir of fluid, said connecting means being connected to a supply line having the flow controller therein, said fluid flow controller comprising:
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a housing having a chamber therein, an inlet to and an outlet from said chamber, a plurality of feed passages within said housing, said passages being in fluid communication with said inlet, each feed passage having a flow restrictor therein which includes at least one orifice configured to control the rate of fluid therethrough so that the fluid flow is at a predetermined constant flow rate, a flow rate selector disposed within the chamber and including a transfer passage, the selector being movable so that the transfer passage can be in communication with one or a selected number of said feed passages, said transfer passage being in communication with the outlet and the arrangement being such that a predetermined flow rate of fluid can be selected by the number of feed passages in communication with the transfer passage as a result of movement of said selector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification