Needleless jet injection device
OwnerAlain Moreau DeFarges, Xavier Moreau DeFargesinventors
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Abstract
Needleless jet-injection device, characterized in that it consists of a body (1) having at one of its ends (4, 5) a cap (3), which, thanks to a relative movement between these elements, may drive a loading mechanism (2), co-operating with an impact component (17) which has to strike the piston of a cartridge (28) which is made of a material that does not pollute the environment and which contains the active product to be injected, this cartridge (28) being moreover placed at the other end of the said magazine-less body (1) and in the axis of said impact component (17), for single use.
Claims21
A reusable needleless jet injection device for the injection of an active product, comprising:
- a tubular member;
- an axially displaceable impacting member;
- a cap mounted at one of the ends of said tubular member;
- a loading device coupled to said cap for being entrained, in response to relative movement between said tubular member and said cap, said loading device cooperating with said axially displaceable impacting member;
- and
- a disposable cartridge which is adapted to assume a first position, in which it is not secured to said apparatus, and a second position in which it is secured to the end of said tubular member opposite said cap in the axis of said impacting member, said cartridge comprising
- (a) attaching means adapted to cooperate with the tubular member to secure the cartridge in the second position,
- (b) an internal cavity adapted to contain the active product to be injected;
- (c) a first aperture acting as a nozzle at its end which is to be furthest away from the tubular body in said second position;
- (d) a second aperture at its end which is to be closest to the tubular member in the second position, and
- (e) a piston closing the cavity on the side of the second aperture, wherein in said first position, the cartridge contains the active product, the piston being in that case interposed between the active product and the surroundings and closing the cavity on the side of the second aperture, while in said second position the piston is adapted to be struck by the impacting member and to communicate to the active product a pressure exerted by the impacting member.
A disposable needleless cartridge for the jet injection of an active product, which is adapted to be secured to one end of the tubular member of a breechless injection device, and which comprises:
- at its other end a cap which, as the result of a relative movement between the tubular member and the cap, can entrain a loading device cooperating with an axially displaceable impacting member, said cartridge comprising securing means adapted to cooperate with the tubular member to releasably secure the cartridge thereto in the axis of the impacting member;
- an internal cavity adapted to contain the active product to be injected;
- a first opening acting as a nozzle at its end which is to be furthest away from the tubular member when the cartridge is secured thereto;
- a second opening at its end which is to be closest to the tubular member;
- and a piston closing the cavity on the side of the second opening, wherein before being secured to the tubular member, the cartridge contains the active product, the piston then being interposed between the active product and the surroundings and closing the cavity of the side of the second opening, and the piston is adapted to be struck by the impacting member and to communicate to the active product the pressure exerted by the impacting member when the cartridge is secured to the tubular member.
Dependencies are inferred from the claim text.