Fluid delivery device with variable force spring
First Claim
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1. A fluid delivery device for dispensing medicaments to a patient comprising:
- (a) a supporting structure;
(b) a pre-filled collapsible container having a continuous wall formed of a single material carried by said supporting structure, said collapsible container comprising an hermetically sealed reservoir having an outlet port and including sealing means for sealing said outlet port; and
(c) stored energy means carried by said supporting structure and operably associated with said collapsible container to deliver a nonlinear force tending to collapse said reservoir to expel fluid therefrom, said stored energy means comprising a spring drum and a spring having an elongated pre-stressed strip, said elongated pre-stressed strip portion being coiled about said spring drum in predetermined varying degrees of tightness and after being wound about said spring drum, said spring will retract in a manner to deliver a nonlinear force tending to collapse said fluid reservoir.
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Abstract
A compact fluid dispenser for use in controllably dispensing fluid medicaments, such as antibiotics, blood clotting agents, analgesics, and like medicinal agents from collapsible containers at a uniform rate. The dispenser includes a novel stored energy source that is provided in the form of a compressible-expandable member that functions to continuously and uniformly expel fluid from the apparatus reservoir. The apparatus further includes a novel fluid flow control assembly that precisely controls the flow of the medicament solutions from the apparatus reservoir to the patient.
9 Citations
20 Claims
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1. A fluid delivery device for dispensing medicaments to a patient comprising:
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(a) a supporting structure; (b) a pre-filled collapsible container having a continuous wall formed of a single material carried by said supporting structure, said collapsible container comprising an hermetically sealed reservoir having an outlet port and including sealing means for sealing said outlet port; and (c) stored energy means carried by said supporting structure and operably associated with said collapsible container to deliver a nonlinear force tending to collapse said reservoir to expel fluid therefrom, said stored energy means comprising a spring drum and a spring having an elongated pre-stressed strip, said elongated pre-stressed strip portion being coiled about said spring drum in predetermined varying degrees of tightness and after being wound about said spring drum, said spring will retract in a manner to deliver a nonlinear force tending to collapse said fluid reservoir. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A fluid delivery device for dispensing medicaments to a patient comprising:
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(a) a supporting structure comprising a base assembly and a housing interconnected with said base assembly; (b) a carriage assembly interconnected with said supporting structure for movement between a first position and a second position; (c) a unitary, pre-filled, collapsible container having an uninterrupted wall carried by said carriage assembly, said collapsible container comprising a reservoir having an outlet port; (d) a stored energy means operably associated with said carriage assembly for moving said carriage assembly between said first and second positions, said stored energy means comprising a spring drum and a spring having an elongated pre-stressed strip of spring material, said elongated pre-stressed strip of spring material of said spring being coiled about said spring drum in predetermined varying degrees of tightness so as to deliver a non-linear force tending to move said carriage assembly between said first and second positions; (e) an administration set, including an administration line interconnected with said outlet port of said collapsible reservoir; and (f) fluid flow control means carried by said supporting structure for controlling fluid flow from said collapsible reservoir toward said administration set. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A fluid delivery device for dispensing medicaments to a patient comprising:
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(a) a supporting structure comprising a base assembly and a housing interconnected with said base assembly; (b) a carriage assembly interconnected with said supporting structure for movement between a first position and a second position; (c) a unitary pre-filled collapsible container having an uninterrupted wall carried by said carriage assembly, said collapsible container comprising a reservoir having an outlet port; (d) a stored energy means operably associated with said carriage assembly for moving said carriage assembly between said first and second positions, said stored energy means comprising a spring drum and a spring comprising an elongated, pre-stressed strip of spring material having a first end and a second end, said pre-stressed strip of spring material being initially wound tightly about said spring drum to produce a first segment having a first diameter, then being wound about said spring drum to produce a second segment having a second diameter larger than said first diameter and finally being wound about said spring drum to produce a third segment having a diameter greater than said second diameter; (e) an administration set, including an administration line interconnected with said outlet port of said collapsible reservoir; and (f) fluid flow control means carried by said base assembly of said supporting structure for controlling fluid flow from said collapsible reservoir toward said administration set. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification