Abstract: A pre-filled ampule and a powered, non-invasive injection device assembly wherein the device includes a housing having an ampule-receiving chamber, a gas charge, and means for delivering a predetermined amount of gas to an ampule-receiving chamber. The device includes an injection-counting ring which is received in a groove extending about the housing wherein the ring includes a counting mechanism thereon and is constructed to allow one-way only rotation thereof relative to the housing. The ampule includes an elongate ampule body having a medication holder located at one end thereof, a transfer area located adjacent the other end thereof and a bypass area located adjacent an end of the transfer area. A plunger is provided and has one end thereof received in and closing one end of the medication holder with the other end of the plunger being received in the ampule-receiving chamber of the injection device. A floating seal is received and encloses the other end of the medication holder.

Abstract: A needleless injector device includes an integral unit that is dimensioned and arranged to be grasped in the hand of a user, loaded with a selected dosage, and held proximate the skin in order to inject the selected dosage in a high pressure jet sufficient to pass the selected dosage through the skin for injection purposes, the unit having a barrel portion, a gas storage portion, and an intermediate portion. A trigger operates a release mechanism to release compressed gas from a storage compartment to act upon a piston and drive a plunger that ejects the selected dosage of medication through an aperture in the discharge end of the barrel portion, the piston face being larger than the plunger face to increase pressure.

Abstract: A hypodermic jet injector includes a resuable, spring-powered gun and a disposable unitary cartridge filled with a substance to be injected. The unitary cartridge has an interrupted flange which cooperates with a shoulder on the gun to releasably affix the cartridge to the end of the gun for use. A predetermined amount of sterile medicament is readily injected from the sterile end of the cartridge without the need to sterilize the gun. This is particularly useful for self-administration of drugs and medicines by the patient.

Abstract: Portable endermic injector of a mechanical type which comprises an aspiration and containment chamber, an assembly (12) to aspirate and to store, a cocking and trigger assembly (13) and an assembly (14) to read the quantity aspirated. A containment assembly (11) comprises the aspiration and containment chamber and a piston (19) and is screwed onto a frontal container (15). The assembly (12) to aspirate and to store energy comprises apparatus to regulate the pre-loading of a spring assembly (28) which includes spacer rings (226) and apparatus (15-23) having variable axial reciprocal positions. The reader assembly (14) comprises a threaded portion (46) and a slider (47) cooperating with a graduated area (50).

Abstract: In this needleless injection instrument, the piston pump (17) for the medium to be injected is connected to a drive motor (18). On the motor housing (1) of the drive motor, an operating element (2) is fitted displaceably and a stroke counter (7) for counting the applications is arranged. To the free shaft end (11) of the stroke counter, a control cam (6) is fixed which engages with a control pin (4) supported on a control roll (3) which is located in the operating element (2) for the drive motor (18).

Abstract: A needleless hypodermic injector has a first substantially cylindrical section and a second substantially cylindrical section movably mounted in a first end of the first section. The first section comprises a hollow cylinder defining a chamber for a substance to be administered, the chamber having therein an externally communicating orifice at a second end of the first section and a piston slidably mounted in the hollow cylinder. The second section comprises spring means in the form of a coil spring and a plurality of disc springs arranged in an axial row for driving the piston in the first section from a retracted position in which the hollow cylinder contains the substance to be administered to an extended position in which the substance is substantially completely discharged through the orifice from the chamber. A bushing is slidably mounted between the piston and the spring means and is capable of engaging the piston as it travels from the retracted position to the extended position.

Abstract: An improved system for injecting liquid medication into the tissues of a person without using a needle to penetrate the skin includes a power supply mechanism having a source of compressed gas which drives a piston against the plunger of a syringe. The syringe has an aperture which is placed against the skin of a person and through which the liquid medication is ejected with sufficient force to pass through the skin and into the underlying tissues. The syringe is provided with a removable needle assembly so that the syringe can be filled with liquid medication in a conventional manner. The system is constructed so that the needle assembly must be removed in order to insert the needle assembly into the power supply mechanism and is also constructed so that the power supply mechanism cannot be triggered to release the compressed gas unless a syringe is inserted in the power supply mechanism and properly secured.

Abstract: In a needleless injection instrument with a removable vaccine pump, the motor housing (1) is provided with a receiving bush (20) which is to receive the vaccine pump. In an opening (7) in the motor housing (1) and the receiving bush (20), a bolt (6) is located which is loaded by a spring (9) and has a nose (5) which engages in a recess (4) in the pump housing (18). The motor housing is also provided with a displaceable operating element (8), to which the bolt (6) is connected and which has a recess (11) for receiving a locking device (14). The locking device (14) is fixed by means of a leaf spring (13) to the motor housing; it can engage either in a groove (15), located in a spring housing (17) provided in the motor housing, or in the recess (11) of the operating element (8).

Abstract: In an inoculating apparatus between the inoculating unit and the actuating unit a quick coupling mechanism is inserted. The inoculating device itself becomes actuated by means of a siphon-cartridge via a valve performing a triple function.The structure ensures the discharge of the carbonic acid gas quantity required for operation through the bore of the piston, simultaneously it prevents further outflow of the carbonic acid gas from the cartridge after work performance.

Abstract: A needleless hypodermic injector includes an elongated cylindrical casing defined by front and rear telescoping sections, with an injection orifice at the closed front end of the front section and a push button trigger at the rear end of the rear section. A piston slidably mounted in a cylinder in the front section of the casing moves rearwardly to define a medicine chamber for receiving medicine from a bottle directly or through a valve incorporated in the front end of the front casing section. The piston is moved rearwardly by an internally threaded collar on the externally threaded cylinder, the collar pressing against a bushing, which presses against disc springs in the rear section of the casing. A latch mechanism retains the bushing against the springs until the trigger is pressed, at which time the springs drive the piston forward to discharge the medicine from the chamber through the injection orifice.

Abstract: This invention concerns an endermic injector device (10) for subcutaneous injections without a needle, said device (10) being suitable for injecting under pressure at least one fluid drawn in a measured dose from replaceable phials (15) which are advantageously of a throwaway kind, whereby nozzle means (18), means to aspirate fluid, means to expel fluid and means to provide the required expulsion force are comprised, said device (10) including in cooperation:an aspiration and ejection group (27) consisting of valve means (19) to draw and deliver fluid, a cylindrical chamber (33) to hold fluid together with a removable small piston (34), and safety means with an alignment head (32),a group to control aspiration and expulsion (29) which comprises means for axial withdrawal of said small piston (34), tripping means (36-38) and spring means (52) for the axial forward movement of said small piston (34),means to regulate (60) the pre-loading of said spring means (52) and means (30) to display the quantity of the do

Abstract: A disposable syringe for use in a needleless hypodermic injector includes a transparent, plastic barrel with an injection orifice in a closed front end thereof and an open rear end for receiving a plunger. The barrel is filled with medicine using a needle, which may be integral with the barrel, by partially withdrawing the plunger from the barrel to suck medicine through the injection orifice. The barrel and plunger are placed in an injector and the injector is actuated to push the plunger into the barrel, discharging the medicine. Alternatively, the syringe is filled with medicine while in an injector of the type which includes a removable injection head and a removable charging or filling head.

Abstract: In this injection instrument, the piston pump (A) is connected to a drive motor (B), of which the working piston (5), supported on a working spring (2), is arranged displaceably in a cylindrical bore (6) of the motor housing (1). A pressure chamber (7) which has supply devices (3, 8) and discharge devices for the pressure medium is formed in the bore (6). The working spring (2) is held in a tensioned position by a pawl (10) supported by a bolt (13), the bolt (13) being supported on an operating element (C).So that injection can be initiated only when the nozzle (23) is pressed onto the subject, the bolt (13) is connected rigidly to the operating element (C), and its free end is arranged displaceably in the motor housing (1).

Abstract: In this injection instrument, the piston pump (A) is connected to a drive motor (B), of which the working piston (5) supported on a working spring (2) is arranged displaceably in a cylindrical bore (6) of the motor housing (1). A pressure chamber (7) which has supply devices (3, 8) and discharge devices (4, 9) for pressure medium is formed in the bore (6).To ensure that the pressure medium cannot be simultaneously supplied to and discharged from the pressure chamber (7), there is a control shaft (37) which is assigned to valves (8 and 9). The control shaft (37) is provided with a lever (38) and has segment-like recesses (39, 40) which interrupt the engagement of the valves (8, 9) with the control shaft (37). The recesses (39, 40) are arranged on the control shaft (37) so that the valves are not engaged simultaneously with the control shaft (37).