A needleless injector having a drive end with an energy source for propelling a quantity of fluid out a distal opening of a barrel of an ampule, wherein the drive end is provided with a cam and a follower for resetting the spring to enable multiple injections and deliveries of a discrete quantities of fluids out the barrel. The drive end can further include a carrier having a stepped barrel for sequentially moving a different surface of a different step adjacent the plunger of the ampule upon each reset of the spring.

An injection device comprises a housing with a receptacle for a product, a dosing mechanism for setting a product dosage to be administered and for displaying the product dosage that has been set, and a dispensing mechanism for dispensing the product. The dosing mechanism comprises a dosing sleeve which is rotatable relative to the housing in a first direction for setting a product dosage and which is rotatable relative to the housing in a second, opposite direction for correcting or dispensing a product dosage. The dispensing mechanism comprises a piston rod, at least one sleeve, and a clutch. The device further comprises a first detector for detecting movement of the clutch relative to the dosing sleeve and/or the housing and/or the at least one sleeve and a data processing unit connected to the first detector for reading, storing, processing, transmitting, and/or displaying signals received from the first detector.

The invention relates to an injection unit, preferably a pen-shaped injection unit, for administering or delivering a fluid product. The injection unit comprises a housing, an axially movable piston rod mounted in the housing in a non-rotatable manner, a delivery apparatus having a threaded nut that is able to move the piston rod in order to deliver product, a dosing device having a dosing sleeve, a rotary knob, a discharge button arranged coaxially on the dosing sleeve, and a receptacle for the product. The dosing device is connected to the delivery apparatus via a coupling mechanism, wherein the coupling mechanism includes of at least two coupling surfaces that each carry a toothing comprising teeth, wherein the coupling surfaces are used to generate an acoustic and/or tactile signal corresponding to the set or corrected dose of the product to be administered during the dosing operation or during correction of the dose.

An injection device for injecting medicament in a patient comprises a housing configured to house a fluid reservoir that has one of a plurality of volumes of medicament. An injection conduit fluidly coupled to the fluid reservoir defines a fluid pathway from the fluid reservoir to the patient. A firing mechanism is coupled to the fluid reservoir and is configured to expel the medicament from the fluid reservoir through the injection conduit. A volume setting mechanism is coupled to the firing mechanism and is configured to select the one of the plurality of volumes of medicament for the firing mechanism to expel. A dose setting mechanism is configured to select all or a fraction of the one of the plurality of volumes of medicament that is injected from the injection conduit when the firing mechanism is actuated.

The present invention relates to a handheld mechanical injection device by which set doses of a liquid medicament can be injected from a medical reservoir. The medicament is expelled through an injection needle by release of a power reservoir in the device, the power reservoir being fully or partially released by actuation of a user operable release member being positioned at or near an upper end of the injection device, the upper end being that end of the injection device which is opposite the injection needle.

An injection device incorporating a dose setting mechanism that contains a dose selector having a fail safe feature that activates during an interrupted dose delivery event where a projecting rib engages a protrusion on a snap element to prevent the dose knob from moving distally when a user removes an axial force in the proximal direction during dose delivery, intermediate stops to assist the user in dialing a dose and an injection feedback mechanism.

Medication delivery devices are provided having a dose delivery sensing capability. A dose button includes a support and a cover that at least partially encloses an electronics assembly including a sensor for detecting rotation of a component during dose delivery to determine a dosage of delivered medication. The electronics assembly includes a controller for receiving a signal from the sensor. The medication delivery device may be configured to communicate dosage delivery information to an external device.

A drug delivery system is provided that has an adjustable dose mechanism allowing setting and locking the dose then administration of the set dose. A method for administering a medicament using the drug delivery system is also provided.

A device for delivery of a medicament from a container (10) having an outlet (16) at a distal end of the container (10) and a stopper (22) for containing the medicament in the container (10). The device comprises a housing (110, 140), a drive element (300) arranged to move in the distal direction to cooperate with the container (10), a drive mechanism comprising a trigger component (200), the drive mechanism being arranged to hold the drive element (300) in a starting position and to move the drive element (300) in the distal direction from the starting position upon displacement of the trigger component (200) from a working position to a firing position, an interlock component (250) received in the housing (110, 140) and arranged for movement with respect to the housing (110, 140) from a first position to a second position, and at least one flexible locking member (214) arranged to cooperate with a stop face (160) associated with the housing (110, 140) to prevent displacement of the trigger component (200) to the firing position when the interlock component (250) is in the first position. Movement of the interlock component (250) towards the second position causes bending of the flexible locking member (214) away from the stop face (160) to allow displacement of the trigger component (200) to the firing position.

An injection device incorporating a dose setting mechanism is presented where the dose setting mechanism contains a dose selector having one or more dose stops corresponding to a finite set of predetermined fixed doses, where the set of finite predetermined fixed doses includes a lowest fixed dose and one or more higher fixed doses, and where at least one of the one or more higher fixed doses is equal to the lowest fixed dose plus a fractional amount of the lowest fixed dose. The dose setting mechanism can further include a floating spline that is rotationally engaged with a snap element such that the snap element can rotate relative to the floating spline during both dose setting and dose delivery.