Infusion apparatus
First Claim
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1. A dispensing apparatus for dispensing fluids to a patient comprising:
- (a) an outer housing having a first, second and third portions;
(b) an inner, expandable housing disposed within said outer housing, said inner expandable housing having a fluid reservoir provided with an inlet for permitting fluid flow into said fluid reservoir;
(c) stored energy means disposed within said second portion of said outer housing for acting upon said inner expandable housing to cause the fluid contained within said fluid reservoir to controllably flow outwardly toward the patient, said stored energy means comprising a compressively deformable, spring member carried within said second portion of said outer housing, said spring member being expandable to cause fluid flow from said fluid reservoir;
(d) fill means carried by said outer housing for filling said reservoir with the fluid to be dispensed;
(e) flow control means connected to said first portion of said outer housing for controlling fluid flow from said reservoir, said flow control means comprising a flow control assembly including;
(i) an ullage defining member having a first portion disposed within said inner, expandable housing and a second portion having a fluid passageway in communication with said outlet of said fluid reservoir;
(ii) a flow control member rotatably mounted within said first portion of said ullage defining member, said flow control member having a plurality of elongated flow control channels, each of said plurality of elongated flow control channels having an inlet and an outlet; and
(iii) selector means rotatably connected to said second portion of said ullage defining member for rotating said flow control member to selectively align an outlet of one of said elongated flow control channels with said with fluid passageway in said second portion of said ullage defining member; and
(iv) dispensing means for dispensing fluid to the patient, said dispensing means being connected to said second portion of said ullage defining member, and being in communication with said fluid passageway of said second portion of said ullage defining member.
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Abstract
A compact fluid dispenser for use in controllably dispensing fluid medicaments, such as, antibiotics, oncolytics, hormones, steroids, blood clotting agents, analgesics, and like medicinal agents from prefilled containers at a uniform rate. The dispenser uniquely includes a stored energy source that is provided in the form of a substantially constant-force, compressible-expandable wave spring that provides the force necessary to continuously and uniformly expel fluid from the device reservoir. The device further includes a fluid flow control assembly that precisely controls the flow of medicament solution to the patient.
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Citations
17 Claims
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1. A dispensing apparatus for dispensing fluids to a patient comprising:
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(a) an outer housing having a first, second and third portions; (b) an inner, expandable housing disposed within said outer housing, said inner expandable housing having a fluid reservoir provided with an inlet for permitting fluid flow into said fluid reservoir; (c) stored energy means disposed within said second portion of said outer housing for acting upon said inner expandable housing to cause the fluid contained within said fluid reservoir to controllably flow outwardly toward the patient, said stored energy means comprising a compressively deformable, spring member carried within said second portion of said outer housing, said spring member being expandable to cause fluid flow from said fluid reservoir; (d) fill means carried by said outer housing for filling said reservoir with the fluid to be dispensed; (e) flow control means connected to said first portion of said outer housing for controlling fluid flow from said reservoir, said flow control means comprising a flow control assembly including; (i) an ullage defining member having a first portion disposed within said inner, expandable housing and a second portion having a fluid passageway in communication with said outlet of said fluid reservoir; (ii) a flow control member rotatably mounted within said first portion of said ullage defining member, said flow control member having a plurality of elongated flow control channels, each of said plurality of elongated flow control channels having an inlet and an outlet; and (iii) selector means rotatably connected to said second portion of said ullage defining member for rotating said flow control member to selectively align an outlet of one of said elongated flow control channels with said with fluid passageway in said second portion of said ullage defining member; and (iv) dispensing means for dispensing fluid to the patient, said dispensing means being connected to said second portion of said ullage defining member, and being in communication with said fluid passageway of said second portion of said ullage defining member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A dispensing apparatus for dispensing fluids to a patient comprising:
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(a) an outer housing having a first, second and third portions; (b) an inner, expandable housing disposed within said outer housing, said inner expandable housing having a fluid reservoir provided with an inlet for permitting fluid flow into said fluid reservoir; (c) stored energy means disposed within said second portion of said outer housing for acting upon said inner expandable housing to cause the fluid contained within said fluid reservoir to controllably flow outwardly toward the patient, said stored energy means comprising a yieldably deformable spring carried within said second portion of said outer housing, said yieldably deformable spring being expandable to cause fluid flow from said fluid reservoir; (d) fill means carried by said outer housing for filling said reservoir with the fluid to be dispensed; (e) flow control means connected to said first portion of said outer housing for controlling fluid flow from said reservoir, said flow control means comprising a flow control assembly including; (i) an ullage defining member having a first portion disposed within said inner, expandable housing and a second portion having a fluid passageway in communication with said outlet of said fluid reservoir; (ii) a flow control member rotatably mounted within said first portion of said ullage defining member, said flow control member having a plurality of elongated flow control channels, each of said plurality of elongated flow control channels having an inlet and an outlet; (iii) an outer casing circumscribing said flow control member; (iv) distribution means formed in said flow control member for distributing fluid from said fluid reservoir to each of said plurality of elongated flow control channels, said distribution means comprising a plurality of radially extending flow passageways formed in said flow control member; (v) selector means rotatably connected to said second portion of said ullage defining member for rotating said flow control member to selective align an outlet of one of said elongated flow control channels with said fluid passageway of said second portion of said ullage defining member said selector means comprising a selector knob connected to said flow control member, said selector knob having (vi) finger gripping means for imparting rotation to said selector knob to align said outlet of a selected one of said elongated flow control channels with said outlet of said fluid passageway in said second portion of said ullage defining member; and (vii) dispensing means for dispensing fluid to the patient, said dispensing means being connected to said second portion of said ullage defining member, and being in communication with said fluid passageway of said second portion of said ullage defining member; and (f) volume indicator means for indicating the volume of fluid remaining in said fluid reservoir. - View Dependent Claims (14, 15, 16, 17)
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Specification