A medication injection pen comprises a dose set knob rotatable with respect to a housing to set a desired injection dose. The dose set knob comprises at least one internal thread. A leadscrew includes a thread element for advancing in a first direction via a corresponding thread engagement. A driver is rotationally fixed to the leadscrew and is rotatable in a first direction to rotate and advance the leadscrew in the first direction. The setback member is rotationally fixed to the driver. The dose stop member is rotationally coupled to the setback member and is axially movable relative to the dose set knob when the dose set knob is rotated relative to the setback member. Axial movement of the dose stop member limits the user from setting a dose that is greater than an injectable volume of medication remaining in a cartridge.

A cartridge comprising a generally cylindrical cartridge main body with a proximal edge portion having a circumferential inner surface and a proximal opening surrounded by a circumferential edge, a piston slidable received therein, and a ring-formed code member attached to the circumferential edge portion and comprising an axially extending mounting portion in engagement with the edge portion circumferential inner surface, a flange portion having a distally facing mounting surface in engagement with the circumferential edge and a proximally facing stop surface, and a drive opening allowing a piston rod to engage the piston proximal surface, wherein the flange portion radially extends within the circumferential boundaries of the cartridge main body.

Apparatus for removably attaching a syringe to a container for extracting fluid therefrom into the syringe, which is particularly beneficial for fluid having a relatively high viscosity. The disclosed container adapter holds a syringe adapter securely therein (the syringe adapter configured for providing a fluid path between a container and a syringe) while also securing the syringe adapter to the container, and provides an attachment point for securely attaching the syringe to the syringe adapter and thus to the container (at least) while the fluid is withdrawn from the container into the syringe. The syringe is removably attached to an end of the syringe adapter during the withdrawal, and a cap is provided that closes entry and exit to this attachment point when the syringe is not in place. The cap preferably attaches to the syringe adapter using a connection that mimics the connection used by the syringe.

Drive and dosing devices for injection devices are disclosed. An embodiment may include a threaded piston rod moveable in a dispensing direction for dispensing a product. A rotation member may be operatively connected to a stop limiter and threadably engaged with the piston rod. Rotation of the rotation member may cause the piston rod to move in the dispensing direction. An embodiment may include a dose knob rotatable for changing a dose. The device may further include a stop element threadably engaged with the piston rod and having a catch. The dose knob may be coupled with the stop element such that during increase of a dose, the stop element is screwed toward the distal end of the piston rod and the catch is moved towards the stop limiter. The stop element prevents increasing a dose when the catch abuts the stop limiter.

The present invention relates to a medicament delivery device comprising a generally tubular distal housing part (10; 110) having opposite proximal and distal ends, wherein third mechanically coded interface means (11; 111) are arranged on its proximal end; a generally tubular proximal housing (20; 120) part having opposite proximal and distal ends and being releasibly connected to said distal housing part, wherein with fourth mechanically coded interface means (22; 122) are arranged on its distal end; a medicament container having a slidable stopper, wherein said container is arranged to be positioned within said proximal housing part; a plunger rod (60; 160) arranged within said distal housing; drive means arranged within said distal housing and being operably connected to said plunger rod for driving said plunger rod and thereby said stopper towards the proximal end of the device; wherein said device further comprises an interface member (50; 150) comprising first (51; 151) and second (52; 152) mechanically coded interface means arranged to match and interact with the third (11; 111) and the fourth (22; 122) mechanically coded interface means when the distal and the proximal housing parts are connected to each other.

An apparatus for filling a syringe with a verified dose of radiant fluid has a container holder that holds a container of the radiant fluid wherein a syringe oriented at a septum of the container can penetrate the septum. The syringe holder is configured to continuously grip the syringe, to drive the syringe to the container holder and penetrate the septum, to fill the syringe with a dose of the radiant fluid from the container, to drive the syringe to a transfer post, to drive the syringe to a metering zone of a metering station in order to verify that measured radiation is compatible with the dose, and to release the continuous grip.

In a medicament dispensing device (1), when a medicament preparation-containing syringe (11) is replaced, a microprocessor (23) detects the time at which the replacement is performed as the time of the start of use of the preparation, and counts the elapsed time after the use of the preparation has started. Then, the microprocessor (23) notifies the result of the counting by a LCD (10), etc. to the user. Also, the microprocessor (23) detects that a syringe needle for dispensing the preparation has been mounted, and after detecting the mounting of the syringe needle, the microprocessor (23) counts the elapsed time after the start of use of the preparation. When an effective use period has expired, the microprocessor (23) issues a message in a step S17 that the effective period of a medicament has expired.

A medication injection pen comprises a dose set knob rotatable with respect to a housing to set a desired injection dose. The dose set knob comprises at least one internal thread. A leadscrew includes a thread element for advancing in a first direction via a corresponding thread engagement. A driver is rotationally fixed to the leadscrew and is rotatable in a first direction to rotate and advance the leadscrew in the first direction. The setback member is rotationally fixed to the driver. The dose stop member is rotationally coupled to the setback member and is axially movable relative to the dose set knob when the dose set knob is rotated relative to the setback member. Axial movement of the dose stop member limits the user from setting a dose that is greater than an injectable volume of medication remaining in a cartridge.

The present invention provides a drug delivery system (1) comprising a drug delivery device (2, 3) carrying at least one reservoir (40a, 40b), and a needle unit (4) being attachable to the drug delivery device (2, 3) in axial extension thereof and adapted to establish a flow way between the at least one reservoir (40a, 40b) and a drug delivery site. The needle unit (4) comprises a needle structure (11) comprising a front needle portion (12) for entering the drug delivery site, and at least one back needle portion (13a, 13b) for insertion into the at least one reservoir (40a, 40b), and a needle shield (20). The needle shield (20) and the needle structure (11) are capable of undergoing relative axial motion between an accommodating relative position in which the needle structure (11) is completely accommodated within the needle shield (20) and a protruding relative position in which the front needle portion (12) protrudes from the needle shield (20), the needle shield (20) and the needle structure (11) being biased towards the accommodating relative position by a first bias force. When the needle unit (4) is attached to the drug delivery device (2, 3) the needle structure (11) and the at least one reservoir (40a, 40b) are capable of undergoing relative axial motion between a disconnected relative position in which the at least one back needle portion (13a, 13b) is spaced apart from the at least one reservoir (40a, 40b), and a connected relative position in which the at least one back needle portion (13a, 13b) and the at least one reservoir (40a, 40b) are fluidly connected, the needle structure (11) and the at least one reservoir (40a, 40b) being biased towards the disconnected relative position by a second bias force which is greater than the first bias force.

An injection device adapted for injecting a durable or pre-filled pen device along an injection direction defining an injection axis. The injection device is provided with a certain holder and locking mechanism for fixing and holding a pen device in a correct position for injection into human skin.