A medicament delivery device for injections or inhalations comprises a supplementary device affixed to it. The supplemental device is provided with an optical system for monitoring a dosage of medicament. The optical system is able to receive reflected and refracted optical images of the dosage value as the optical signals from the medicament delivery device and thus keep a dosage window on the medicament delivery device free for direct monitoring by a user due to changing the transferring of the optical signal direction. The supplemental device is able to analyze, record and display the dosage and the other relevant data on a display and inform the user. The supplemental device is also able to transmit the medicament delivery data to an external device. A method for collecting the medicament delivery data including the medicament dosage information from a dosage setting mechanism and controlling the dosage, recording and displaying the dosage data by the supplemental device on its display is disclosed. The method allows due to changing of the optical signal transmitting direction by the optical system also simultaneously monitoring the dosage window of the medicament delivery device. This method increases a safety and minimizes the dosage setting errors.

A drug delivery device comprising: a housing; a plurality of sensors; and a cylindrical member supported within the housing, an outer surface of said cylindrical member being provided with a helical track, the helical track comprising track segments of a first type and track segments of a second type, the first and second types of track segments being respectively capable of inducing first and second responses in the sensors; wherein: the helical track has a width; the helical track includes across the width of the helical track at least one track segment of the first type and at least one track segment of the second type at plural positions along a length of the helical track; the device is configured such that during a first phase of a drug delivery operation the helical track is moved axially, without rotation, relative to the plurality of sensors between a first position and a second position, and during a second phase of the drug delivery operation the track is moved helically relative to the plurality of sensors from the second position; and responses induced in the plurality of sensors by the track segments of the helical track are different in the first position compared to responses induced in the plurality of sensors by the helical track in the second position.

A motorized drug delivery device configured to administer at least one pre-set dose of a medicament contained within a medicament container. The delivery device comprising a user activation system (13), a motor (22), a gear train (15) operatively coupled to the user activation system and the motor, and a piston plunger system (200) operatively coupled to the gear train. The piston plunger system comprises a piston plunger (50) and at least one plunger extension (42; 44) for extending a length of the piston plunger. The piston plunger system is configured to act on a stopper contained within the medicament container to deliver at least one pre-set dose of medicament. The user activation system comprises a mechanical automatic reset activation system for automatically resetting the drug delivery device after administration of the pre-set dose.

A liquid medicament administration device includes a body configured to contain and support a medicament container. The body includes an aperture. The aperture includes a viewing window that is coincident with the medicament container when the medicament container is present. The device is configured such that the viewing window is size-adjustable. Also disclosed are associated methods of manufacture.

A medicament dispensing mechanism is disclosed that is configured to eject successive doses of the medicament from a medicament chamber. An embodiment of the dispensing mechanism includes a housing and a plunger rod configured for ejecting the doses of medicament from the chamber. The dispensing mechanism further includes an actuation mechanism that comprises a trigger associated with the housing and having a ready and a fired position with respect thereto. The trigger is configured for manipulation by a user for successive movement in a generally axial dosing motion from the ready position to the fired position in which the trigger is associated with the plunger rod to cause the plunger rod to eject one of the doses of a predetermined volume and a resetting motion from the fired position to the ready position that comprises axial rotation, wherein the trigger is uncoupled from the plunger rod during the resetting motion.

A drive assembly for a drug delivery device includes a housing; a number sleeve threadedly engaged with the housing; a dial link rotatably fixed with the number sleeve in a first axial arrangement relative to each other, the number sleeve being rotatable relative to the dial link in a second axial arrangement; a clutch component connected to an inner proximal section of the number sleeve through multiple flexible assembly fingers. The clutch component can engage the number sleeve with the dial link in the first axial arrangement and disengage the number sleeve from the dial link in the second axial arrangement. The drive assembly includes means for preventing an access to the flexible assembly fingers from the outer proximal section of the number sleeve and/or the flexible assembly fingers from flexing inwardly and disengaging from the connection with the inner proximal section.

A medicament dispensing mechanism is disclosed that is configured to eject successive doses of the medicament from a medicament chamber. An embodiment of the dispensing mechanism includes a housing and a plunger rod configured for ejecting the doses of medicament from the chamber. The dispensing mechanism further includes an actuation mechanism that comprises a trigger associated with the housing and having a ready and a fired position with respect thereto. The trigger is configured for manipulation by a user for successive movement in a generally axial dosing motion from the ready position to the fired position in which the trigger is associated with the plunger rod to cause the plunger rod to eject one of the doses of a predetermined volume and a resetting motion from the fired position to the ready position that comprises axial rotation, wherein the trigger is uncoupled from the plunger rod during the resetting motion.

An autoinjector drug delivery device configured with a stall and endpoint detection algorithm is described that allows for variations in the fill of the drug, barrel, plunger, and other components. The stall or end point detection causes the autoinjector to stop an extrusion process.

Sensing systems are disclosed for determining the relative rotational movements of members of a medication delivery device which are proportional to the amount of a dose set and delivered by the medication delivery device. The sensing system comprises a first sensor component secured to a first member and a second sensor component secured to a second member. During dose setting, the second member is coupled to a third member which rotates relative to the first member in proportion to the dose set. During dose delivery, the second member is coupled to a fourth member which rotates relative to the first member in proportion to the dose delivered. The sensing system separately detects the relative rotational positions of the first and second sensor components during dose setting and dose delivery, and provides outputs used to determine the amounts of the set and delivered doses. The sensing system outputs this information to a controller which determines the amount of the dose set and delivered. Related medication delivery devices and methods are also disclosed.

An example injector includes a rotary knob for selecting a function and setting a dosing quantity for an injection, a button located on an end of the rotary knob for initiating the injection, an electric motor, an encoder for evaluating output rotary motion of the motor, and a processor that converts the dosing quantity into a number of encoder pulses and controls operation of the motor based on the number of encoder pulses when dosage is triggered. The injector also includes a transmission coupled to the electric motor to convert a speed of the motor, a threaded spindle coupled to the transmission that moves linearly based on the output rotary motion of the motor at the speed as converted by the transmission, and a punch connected to an end of the threaded spindle. The linear movement of the spindle causes the punch to release medicament.