Fluid dispensing apparatus with flow rate control
First Claim
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1. A device for use in infusing medicinal fluid into a patient at a controlled rate comprising:
- (a) a housing including a base;
(b) stored energy means for forming, in conjunction with said base, a fluid reservoir having an inlet and an outlet, said stored energy means comprising at least one distendable member superimposed over said base, said member being distendable as a result of pressure imparted by the fluids to be infused, to establish internal stresses, said stresses tending to move said member toward a less distended configuration;
(c) fluid delivery means in communication with said outlet of said fluid reservoir for delivering fluid from the device;
(d) flow rate control means disposed between said outlet of said fluid reservoir and said fluid delivery means for controlling the rate of fluid flow toward said fluid delivery means, said flow rate control means comprising;
(i) a selector member rotatably carried by said housing, said selector member having a plurality of fluid passageways formed therein; and
(ii) a flow rate control assembly disposed between said outlet of said fluid reservoir and said selector member, said flow control assembly comprising a rate control base and a rate control cover connected to said base, one of said rate control base and said rate control cover having a plurality of elongated fluidic flow control channels in communication with said plurality of fluid passageways formed in said selector member; and
(e) fill means connected to said housing for filling said reservoir.
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Abstract
An apparatus for delivering fluids at precisely controlled rates to ambulatory patients. The invention comprises a housing having a fluid reservoir to contain fluids to be delivered to the patient, a novel stored energy membrane for expelling fluid from the reservoir and a unique flow control assembly in communication with the fluid reservoir for the precise infusion of pharmaceutical fluids to ambulatory patients at precisely controlled rates. The flow control assembly includes a novel rate control member having a plurality of fluidic micro-channels through which the fluid is selectively directed.
118 Citations
23 Claims
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1. A device for use in infusing medicinal fluid into a patient at a controlled rate comprising:
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(a) a housing including a base;
(b) stored energy means for forming, in conjunction with said base, a fluid reservoir having an inlet and an outlet, said stored energy means comprising at least one distendable member superimposed over said base, said member being distendable as a result of pressure imparted by the fluids to be infused, to establish internal stresses, said stresses tending to move said member toward a less distended configuration;
(c) fluid delivery means in communication with said outlet of said fluid reservoir for delivering fluid from the device;
(d) flow rate control means disposed between said outlet of said fluid reservoir and said fluid delivery means for controlling the rate of fluid flow toward said fluid delivery means, said flow rate control means comprising;
(i) a selector member rotatably carried by said housing, said selector member having a plurality of fluid passageways formed therein; and
(ii) a flow rate control assembly disposed between said outlet of said fluid reservoir and said selector member, said flow control assembly comprising a rate control base and a rate control cover connected to said base, one of said rate control base and said rate control cover having a plurality of elongated fluidic flow control channels in communication with said plurality of fluid passageways formed in said selector member; and
(e) fill means connected to said housing for filling said reservoir. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A device for use in infusing medicinal fluid into a patient at a controlled rate comprising:
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(a) a housing including a base provided with a connector portion;
(b) stored energy means for forming, in conjunction with said base a fluid reservoir having an inlet and an outlet, said stored energy means comprising a distendable membrane superimposed over said base, said membrane being distendable as a result of pressure imparted by the fluids to be infused, to establish internal stresses, said stresses tending to move said membrane toward a less distended configuration;
(c) fluid delivery means in communication with said outlet of said fluid reservoir for delivering fluid from the device;
(d) flow rate control means disposed between said outlet of said fluid reservoir and said fluid delivery means for controlling the rate of fluid flow toward said fluid delivery means, said flow rate control means comprising;
(i) a selector member rotatably carried by said housing, said selector member having a plurality of fluid passageways formed therein;
(ii) a flow rate control base disposed between said outlet of said fluid reservoir and said selector member, said flow rate control base having a plurality of elongated fluidic flow control channels in communication with said plurality of fluid passageways formed in said selector member;
(iii) selector means carried by said housing for controllably rotating said selector member, said selector means comprising a control knob operably interconnected with said selector member; and
(iv) priming means for priming said plurality of fluid passageways formed in said flow control member and in said selector member, and (e) fill means connected to said housing for filling said reservoir, said fill means comprising a fill assembly interconnectable with said connector portion of said housing. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification