Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1996-10-01
1999-03-09
Coggins, Wynn Wood
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604135, A61M 530
Patent
active
058793275
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a device which allows a product, particularly a pharmaceutical product, to be injected into the bodies of humans or animals.
In particular, it refers to an apparatus which does not have a hypodermic needle, and is provided with a loading system that allows the cutaneous or muscular administration of medicinal or vaccinal substances, contained in a single use, cartridge forming dose.
Needleless, transcutaneous, jet-injection apparatuses which have been developed for veterinary or human medicine are already known. The absence of a needle simplifies usage of the apparatus and does not require specific knowledge on the part of the user. They are generally employed for mass vaccination campaigns and are designed so that they may be quickly operated by non-specialist staff. By resorting to a jet, there is maximum avoidance of bacterial and/or viral contamination from one subject to another, which occurred in cases where the same needle was used on several subjects without sterilization. These apparatuses are generally made in the form of a gun, equipped with a container for the product to be injected, operated through a nozzle, through the action of a piston moving in a chamber which was beforehand filled with the substance, the piston being actuated by a hammer, or comprising a breech or magazine enclosing a cartridge placed evenly in the axis of the hammer.
Having taken into consideration the mode of action of the hammer, which has an important kinetic energy before it reaches the piston of the cartridge, which in the case where the cartridge is incorrectly positioned in the magazine of the gun, may induce explosion thereof at the start of the injection, these apparatuses are not reliable and are not easy to put into operation for utilisation not involving frequent use.
The present inventon is thus concerned with the elimination of these drawbacks, by proposing a device, which does not have a magazine for the cartridge, which allows the needleless jet-injection of the product contained in a cartridge placed directly in the head of said device, under stringent aseptic conditions, for single unit use.
To this end, the needleless jet-injection device is characterised in that it consists of a body having at one of its ends a cap, which, thanks to a relative movement between these elements, may entrain a loading mechanism, co-operating with an impact component which has to strike the piston of a cartridge containing the active product to be injected, this cartridge being positioned moreover at the other end of the said magazine-less body and in the axis of said impact component.
According to another advantageous characteristic of the invention, the needleless jet-injection device is characterised in that between the cap and the loading mechanism, there is a disengagable connection means.
Other characteristics and advantages of the present invention will become evident from the following description, with reference to the attached drawings, which illustrate an example of realisation which is in no way limited. In the figures:
FIG. 1 is a plan view, in frontal elevation and in section, of the device according to the invention, in loaded position;
FIG. 2 is a plan view, in frontal elevation and in section, of the device according to the invention, in triggered position;
FIG. 3 is a large-scale view in section of a cartridge containing one dose of the injectable product;
FIG. 4 is a view illustrating another method of fixing the cartridge onto the device;
FIG. 5 is a view in section illustrating the movement of the hammer on the elastomeric button contained in the cartridge;
FIG. 6 is a view in perspective of the clamping system which compels the rod of the hammer to be grasped;
FIG. 7 is a plan view, in frontal elevation and in section, of the device according to another mode of the invention, consisting of a disengagable connection means;
FIG. 8 is a view in perspective of the disengagable connection means.
According to a preferred embodiment, the device which is the object of the inv
REFERENCES:
patent: 5334144 (1994-08-01), Alchas et al.
patent: 5599302 (1997-02-01), Lilley et al.
Moreau Defarges Alain
Moreau Defarges Xavier
Behr Esq. Omri M.
Coggins Wynn Wood
Gring N. Kent
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