Vacuum infusion device
First Claim
Patent Images
1. A device for infusing liquid comprising:
- a liquid chamber adapted to receive a liquid under pressure, the liquid chamber having a liquid plunger contained within the liquid chamber and a fluid conduit extending from the liquid chamber;
a vacuum chamber, the vacuum chamber having a vacuum plunger contained within the vacuum chamber;
an arm connecting the liquid plunger and the vacuum plunger such that when liquid is introduced into the liquid chamber under pressure the vacuum plunger biases; and
means for preloading the vacuum plunger such that the vacuum plunger does not abut an end of the vacuum chamber housing after infusion.
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Accused Products
Abstract
A vacuum biased disposable infuser is provided having a liquid chamber (14) and at least one vacuum chamber (44). The liquid chamber (14) includes a liquid plunger (26) contained therein while the vacuum chamber (44) includes a vacuum plunger (48). The plungers (26, 48) are connected by an arm such that when liquid under pressure is provided to the liquid chamber (14), the vacuum plunger (48) is drawn back in the vacuum chamber (44). The device is further preloaded such that at the end of infusion, the vacuum plunger (48) does not abut against the vacuum chamber (44).
40 Citations
10 Claims
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1. A device for infusing liquid comprising:
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a liquid chamber adapted to receive a liquid under pressure, the liquid chamber having a liquid plunger contained within the liquid chamber and a fluid conduit extending from the liquid chamber; a vacuum chamber, the vacuum chamber having a vacuum plunger contained within the vacuum chamber; an arm connecting the liquid plunger and the vacuum plunger such that when liquid is introduced into the liquid chamber under pressure the vacuum plunger biases; and means for preloading the vacuum plunger such that the vacuum plunger does not abut an end of the vacuum chamber housing after infusion. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An infusion device comprising:
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a tubular housing for receiving a liquid having at one end an outlet aperture; a liquid plunger slidably mounted in the liquid tubular housing; at least one tubular housing having a closed end defining a vacuum chamber; a vacuum plunger slidably mounted in the closed end tubular housing; an arm connecting the liquid plunger and the vacuum plunger such that when liquid is introduced under pressure in the liquid tubular housing via the outlet aperture the vacuum plunger biases; and means for preloading the vacuum plunger such that upon expulsion of the liquid from the liquid tubular housing the vacuum plunger is a preload distance from the closed end of the vacuum housing. - View Dependent Claims (8, 9, 10)
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Specification