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Medical Syringe Patent

Medical syringe

A medical syringe 2 includes a cylindrical syringe body 3 and a plunger 4 fitted in the syringe body 3 for injecting a liquid agent filled in the syringe body 3 from the syringe body 3 into the vascular system of the human body by advancing the plunger 4 relative to the syringe body 3. The plunger 4 comprising a plunger body 5 and an elastic cover 9 fitted over the plunger body 5 from the front. The plunger body 5 is provided with a backplate 62 at a rear end thereof, the backplate 62 having an annular groove 68 forwardly opened and formed in a front surface outer peripheral portion thereof. The portion of the elastic cover 9 to be rearwardly stretched by the advance of the plunger 4 is allowed to ingress into the annular groove 68 for escape.

Medical syringe with braked step-advance plunger

A medical syringe has a tubular body extending along an axis and having a front end and a rear end, a plunger axially slidable in the body and carrying a stem projecting axially rearward out of the body from the plunger, and a free piston slidable in the body forward of the plunger and subdividing the body forward of the plunger into a front compartment at the front body end and a rear compartment between the plunger and the piston. The body is formed with a bypass passage forward of the piston in a starting position so the front compartment can hold a soluble medicament and the rear compartment can hold its solvent. Structure at the rear body end forms a radially inwardly open angularly limited cutout and at least two axially spaced, angularly offset, and radially outwardly projecting stop bumps on the stem are axially displaceable through the cutout in respective angularly offset positions of the stem. The stop bumps are axially engageable against the structure except when the stem is in the respective angular position. An elastically deformable brake element engaged between the body and the stem for axially slowing axial forward advance of the stem.

Medical syringe container

Telescoping leakproof two-piece medical syringe container. An upper tubular member or "cap" closed at its top end is wide enough along its vertical extent and downward to surround a syringe plunger, and also extends laterally from near its open lower end outward and downward to that end, so as to surround a finger grip of a syringe. A lower tubular member or "body" closed at its bottom end is wide enough along its vertical extent and upward to surround a syringe barrel with optional attached needle, and also extends laterally, from near its open upper end outward and upward to that end, so as to surround the syringe finger grip. The cap member and the body member telescope snugly together, and are retained against accidental opening by one or more detents on the open end of one of the tubular members overlapping the end of the other tubular member. At least one open end is tapered relative to the other open end to ensure that a leakproof container results when telescoped together.

Medical syringe

The invention concerns a medical syringe comprising a tubular body, in which slides a plunger comprising an opening, the plunger comprising a sealing piece, movable in the plunger and which closes the opening of the syringe before it is used. The assembly is arranged such that, after the syringe has been used, the sealing piece no longer closes the opening permanently, so that the syringe cannot be used again. All the parts of the syringe are designed for being produced by moulding and automatically mounted in series by axial jointing.

1 6432089 Medical syringe
2 6419656 Medical syringe with braked step-advance plunger
3 6155420 Medical syringe container
4 6083200 Medical syringe
5 5918443 Medical syringe containment
6 5586976 Medical syringe needle sheath holding device
7 5527283 Safe medical syringe and method of manufacture
8 5304138 Single use, destructible medical syringe
9 5290260 Rotational pressure drive for a medical syringe
10 5232457 Medical syringe
11 5181909 Ampule-container medical syringe and methods
12 5160327 Rotational pressure drive for a medical syringe
13 5067949 Instrument for unsheathing, resheathing and disposing of a medical syringe needle
14 4938354 Device for holding a medical syringe
15 4888002 Disposable shield medical syringe
16 4883471 Disposable shielded medical syringe
17 4687467 One-time use medical syringe invention
18 4666435 Shielded medical syringe
19 4650468 Medical syringe
20 4553962 Medical syringe
21 4484915 Medical syringe
22 4232670 Tube type supply container for medical syringe
23 20050148945 Medical syringe
24 20040144669 Medical syringe container

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