Multiple pharmaceutical syringe
First Claim
1. A syringe, for use with liquid-filled pharmaceutical cartridges of the type having a barrel, the barrel having an open end and an accessible end, a piston within the interior of the barrel and a liquid within the barrel between the piston and the accessible end, comprising:
- a body configured to house first and second of the cartridges therein;
a replaceable fluid path assembly mountable to the body, comprising;
an elongate accumulator chamber;
a movable accumulator piston housed within the accumulator chamber;
first means, engageable with the accessible ends of the first and second cartridges, for fluidly coupling the interiors of the barrels of the first and second cartridges to the accumulator chamber; and
means for preventing fluid flow into the interiors of the barrels of the first and second cartridges;
a hollow needle;
means for selectively fluidly coupling the hollow needle with the accumulator chamber; and
stem means engageable with the cartridge pistons and the accumulator piston by which selected amounts of liquid from the first and second cartridges are forcible by the stem into the accumulator chamber to mix within the accumulator chamber, the mixed liquid in the accumulator chamber being forcible by the stem through the selectively fluidly coupling means and through the hollow needle.
1 Assignment
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Accused Products
Abstract
A multiple pharmaceutical syringe (160), especially useful for use in dispensing insulin, includes a body (162) housing first and second pharmaceutical-filled cartridges (182, 184). The cartridges are of the type with a septum (190) at one end and a piston (224, 225) at the other end with the liquid pharmaceutical (226, 228) between the two. The body also defines an accumulator chamber (202) within which an accumulator piston (238) is slidably mounted. When the cartridges are mounted within the body, the septums are pierced by hollow spikes (188) which are connected to a flow path opening into the accumulator chamber. Check valves (230) are used at the distal ends of the spikes to prevent liquid flow back into the cartridges. Pressing on the cartridge pistons forces the liquids into the accumulator chamber. Once the desired amounts of both liquids are in the accumulator chamber, the needle assembly is mounted to the replaceable fluid path assembly which fluidly couples the needle to the accumulator chamber. The injection is given by driving the accumulators piston using the accumulator stem.
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Citations
8 Claims
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1. A syringe, for use with liquid-filled pharmaceutical cartridges of the type having a barrel, the barrel having an open end and an accessible end, a piston within the interior of the barrel and a liquid within the barrel between the piston and the accessible end, comprising:
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a body configured to house first and second of the cartridges therein; a replaceable fluid path assembly mountable to the body, comprising; an elongate accumulator chamber; a movable accumulator piston housed within the accumulator chamber; first means, engageable with the accessible ends of the first and second cartridges, for fluidly coupling the interiors of the barrels of the first and second cartridges to the accumulator chamber; and means for preventing fluid flow into the interiors of the barrels of the first and second cartridges; a hollow needle; means for selectively fluidly coupling the hollow needle with the accumulator chamber; and stem means engageable with the cartridge pistons and the accumulator piston by which selected amounts of liquid from the first and second cartridges are forcible by the stem into the accumulator chamber to mix within the accumulator chamber, the mixed liquid in the accumulator chamber being forcible by the stem through the selectively fluidly coupling means and through the hollow needle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification