A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
128/93
A61M 5/158 (2006.01) A61J 1/20 (2006.01) A61M 5/162 (2006.01)
Patent
CA 2010993
An improved needle device for infusion of the type including a liquid delivering passage and an air introducing passage extending in parallel with each other is disclosed. The needle device comprises a tubular needle, a bottom portion into which the rear part of the tubular needle is immovably fitted, a flange portion made integral with the bottom portion, a cover member airtightly secured to the flange portion and a valve disc received beneath a circular projection on the flange-shaped part of the cover member. As air enters through an air inlet port on the flange portion, the valve disc is raised up so that air is introduced into the interior of a parenteral liquid container via a cutout on the circular projection, a clearance between the bottom portion and the cover member and an annular clearance between the tapered foremost end of the cover member and the tubular needle. When liquid in the container flows out through the air inlet port, the valve disc comes in the inside wall surface of the flange portion under the effect of dead weight of the liquid itself to close the air inlet port with the valve disc.
Iwata Minoru
Noji Yukio
Yamashita Hideyuki
Jms Co. Ltd.
Kirby Eades Gale Baker
LandOfFree
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