Japan Medical Supply Co., Ltd.

Minoru Iwata

Hideyuki Yamashita

Yukio Noji

An improved assembly, composed of a hard member and a soft tube fitted onto the hard member, for medical uses is formed with a plurality of projections on the side wall of a flange of the hard member. The projections project toward the soft tube side to firmly hold the foremost end part of the soft tube between the projections and a fitting portion of the hard member in a clamped state when the soft tube is fitted onto a fitting portion of the hard member. The foremost end surface of the soft tube may slantwise be cut to define a certain angle relative to the center axis of the assembly such that the foremost end part of the soft tube comes in tight contact with the side wall of the flange when the soft tube is fitted onto the fitting portion of the hard member. The soft tube may be formed with a plurality of cutouts which are arranged along the periphery of the foremost end surface of the soft tube in a spaced relationship. Each cutout preferably exhibits a V-shaped contour which defines a certain opening angle symmetrically relative to the center axis of the assembly.

Assembly composed of hard member and soft tube for medical use

An improved infusion needle device of the type including a liquid delivering passage and an air introducing passage extending in parallel with each other includes 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 the 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 the dead weight of the liquid itself to close the air inlet port with the valve disc.

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Miyoshi, Japan

Minoru Iwata