Abstract: The invention relates to a needless syringe (1), comprising in succession, a gas generator (2), a gas expansion chamber (3) and a means for retaining the particles of an active agent, comprising at least one lid (8) which breaks under the influence of the gas coming from the generator (2). The main characteristic of the inventive syringe (1) is that the tube (6) has a cylindrical upstream part in which the means retaining the particles are fixed, said upstream part having a substantially constant cross-section over a length that is more than twice its inner diameter.

Abstract: The technical field of the invention is that of needleless syringes used for injecting active principles in powder form for therapeutic purposes. The invention concerns a needleless syringe (1) comprising successively a gas generator (2), a gas expanding chamber (3), means for retaining active particles and an ejection tube (4). The invention is characterised in that the particle retaining means consists of an inner seal (14) having at least a cavity (15), the inner seal (14) serves both to contain the active principle and to generate a shock wave when it is ruptured.

Abstract: The invention concerns the field of needleless syringe having an injector with several ducts. The problem that needs to be solved is the long term compatibility of the injector with the liquid active principle. For that purpose the syringe (1) comprises a cylindrical reservoir (2), closed at its upstream part by a closure element (3) capable of being moved by driving means (70), and closed at its downstream part by an injector (4) comprising at least an injection duct and said reservoir being secured to the body (8) of the syringe, said syringe is such that the diaphragm (5), compatible with the active principle, isolates the latter from the injector (4) and said diaphragm can be passed through by the liquid (6) when pressurised for injection.

Abstract: The invention concerns the field of needleless syringe having an injector with several ducts. The problem that needs to be solved is the long term compatibility of the injector with the liquid active principle. For that purpose the syringe (1) comprises a cylindrical reservoir (2), closed at its upstream part by a closure element (3) capable of being moved by driving means (70), and closed at its downstream part by an injector (4) comprising at least an injection duct and said reservoir being secured to the body (8) of the syringe, said syringe is such that the diaphragm (5), compatible with the active principle, isolates the latter from the injector (4) and said diaphragm can be passed through by the liquid (6) when pressurised for injection.

Abstract: The technical field is that of pre-filled disposable needleless syringes, operating with a gas generator (100) and used for intradermal, subcutaneous and intramuscular injections of liquid active principle for therapeutic purposes in human and veterinary medicine. The inventive needleless syringe (1) is characterised in that it comprises a compact architecture body (2) and the gas generator (100) is released by a cap (17) covering said body (2), said cap (17) being adapted to slide along said body (2). Said releasing mode provides the syringe with great stability (1) at the time of injection.

Abstract: The invention concerns the field of needless syringe for injecting liquid active principle for therapeutic purposes. It concerns a syringe wherein the active principle (1, 10) is initially placed between an injector (2, 22) comprising at least an injection duct (3, 23) contacted with the skin and a mobile wall (4, 24) separated from thrusting means (5, 25) displaced by gases of propellant generator (7, 27) pressurising and expelling the active principle. Said syringe aims at quickly providing a high expelling speed of the liquid to efficiently perforate the skin and improve bioavailability. Said syringe is characterised in that said thrusting means (5, 25) comprising temporary retention device (6, 26) deactivated by the operation of the propellant generator (7, 27).

Abstract: The invention concerns the field of needleless syringe having an injector with several ducts. The problem that needs to be solved is the long term compatibility of the injector with the liquid active principle. For that purpose the syringe (1) comprises a cylindrical reservoir (2), closed at its upstream part by a closure element (3) capable of being moved by driving means (70), and closed at its downstream part by an injector (4) comprising at least an injection duct and said reservoir being secured to the body (8) of the syringe, said syringe is such that the diaphragm (5), compatible with the active principle, isolates the latter from the injector (4) and said diaphragm can be passed through by the liquid (6) when pressurised for injection.

Abstract: The technical field of the invention is that of needleless syringes used for injecting active principles in powder form for therapeutic purposes. The invention concerns a needleless syringe (1) comprising successively a gas generator (2), a gas expanding chamber (3), means for retaining active particles and an ejection tube (4). The invention is characterised in that the particle retaining means consists of an inner seal (14) having at least a cavity (15), the inner seal (14) serves both to contain the active principle and to generate a shock wave when it is ruptured.

Abstract: A needleless syringe equipped with an initiating device comprising a triggering device and a pyrotechnic charge, wherein the triggering device contains a triggering member connected to a friction igniter that initiates the pyrotechnic charge by friction. An advantage of the invention is that the syringe produces very limited amounts of noise during operation.

Abstract: The invention relates to the technical field of needleless syringes for injecting a liquid active principle. It concerns the production of a simple device for in particular providing smooth injections in the initial stage. Said syringe comprises a reservoir (3) sealed with mobile closure elements (4,5) enclosed the liquid (6), the reservoir being initially isolated from the injection system which is so designed that it comprises at least two peripheral injection conduits (8) located outside a receptacle (7) comprising a blind bore (10) which receives the downstream closure element (5) such that the inlets (8a) of the conduits are cleared.

Abstract: The invention concerns the field of needleless syringes for injecting a liquid active principle. It improves bioavailability by providing injection at two speed levels. The syringe comprises a reservoir (2) contained between an injector (3) and push means subjected to the action of a gas generator (7), said push means comprising an end, directed towards the active principle, which forms a delivery head (4) whereof the cross-section is smaller than the powering head (6) cross-section, the powering travel (C1) in the power cylinder (10) being shorter than the height (H1) of the active principle reservoir (2).

Abstract: The subject of the present invention is a cryptographic system, having two inverse permutations, which can be implemented in a (micro) computer whose data processing resources are relatively limited. The two inverse permutations are processed with one and the same table, and the data zones, before and after permutation, occupy only one and the same memory zone. Applied to the DES cryptographic system, this can in particular be implemented in the memory card for the purpose of ensuring the security of transmissions between the card and a communication system; in particular the card reader of this system.

Abstract: The invention concerns an implantable drug-dispensing capsule and a process and system facilitating its use. According to the invention, a mechanism (7) for detecting the proximity of the injection needle (1) is provided inside the body (5) of the capsule (3), which detection mechanism is connected to an external signaling device (32) which signals when this proximity is realized.The invention is in particular applicable to the injection of various drugs in localized sites.