Abstract: The present invention relates to a torsion spring driven injection device for delivering multiple set doses of a liquid drug from a cartridge by moving a plunger forward inside the cartridge. The torsion spring (134) applies a rotational torque onto a drive member (120) engaging a piston rod (115) which is then driven forward by this rotation. The piston rod driver can be coupled and de-coupled from the torsion spring mechanism. In the de-coupled position, the piston rod driver is freely rotatable and can thus rotate if the piston rod is moved axially. A further torsion arrangement (124) is preferably provided such that a torque is build up between the piston rod driver and the housing whenever the piston rod is moved backwards. This torsion arrangement urges the piston rod driver to rotate in a direction bringing the piston rod forward into abutment with the plunger.

Abstract: A device for administering a fluid medicament by injection comprises a dosing portion (1) with a collapsible reservoir (10). The reservoir (10) has a maximum volume in an extended state and a minimum volume in a collapsed state. Prior to injection, the reservoir (10) is in the extended state and contains a liquid to be administered, and the reservoir (10) is biased towards the collapsed state. The device further comprises a needle (2), wherein a lumen (20) of the needle (2) is in fluid communication with the reservoir (10). The device further comprises a shield portion (3) with a plug (30). Prior to injection, the shield portion (3) is in a deployed position where the plug (30) blocks the lumen (20) of the needle (2). The shield portion (3) is adapted to move in response to an actuation force from the deployed position to a retracted position where the lumen (20) of the needle (2) is open, thereby causing the reservoir (10) to shift to the collapsed state to expel the liquid through the needle.

Abstract: The present invention relates to a torsion spring based automatic injection device for apportioning set doses of a liquid drug and which injection device is provided with an End-of-Dose feedback mechanism providing a user with an audible signal once the set dose has been injected. During injection, the scale drum rotates back to its “zero” position under influence of the torsion spring. This rotation is halted shortly before reaching the “zero” position by stopping means. The scale drum is thereafter only allowed to continue rotation and thus reach the “zero” position once the torque applied to the scale drum by the torsion spring surpasses a threshold value.

Abstract: The present invention relates to an injection device for automatic torsion spring driven injection of a liquid drug. The injection device is of the type wherein a telescopically movable needle shield (20) activates the release of the torque of the torsion spring to drive the injection when the needle shield is moved from its extended position to a retracted position. The injection device is provided with a needle interface (30) carrying the injection needle, which needle interface is provided with means (32) preventing axial movement of the shield when no injection needle is mounted. Further, other means are provided to restrain the needle shield in the retracted position when the injection device is its “zero” position such that a user has access to the injection needle in order to exchange the injection needle.

Abstract: The present invention relates to a torsion spring based automatic injection device for apportioning set doses of a liquid drug and which injection device is provided with an End-of-Dose feedback mechanism providing a user with an audible signal once the set dose has been injected. During injection, the scale drum rotates back to its “zero” position under influence of the torsion spring. This rotation is halted shortly before reaching the “zero” position by stopping means. The scale drum is thereafter only allowed to continue rotation and thus reach the “zero” position once the torque applied to the scale drum by the torsion spring surpasses a threshold value.

Abstract: The present invention relates to a torsion spring based automatic injection device for expelling settable doses of a liquid drug. The spring mechanism of the injection device comprises a housing assembly and a dose setting assembly being rotatable relatively to the housing assembly and a torsion spring (1) encompassed there between such that the torsion spring (1) is strained when rotating the dose setting assembly relatively to the housing assembly. The torsion spring (1) is helically coiled having a longitudinal direction (X) and a number of consecutive windings wherein a distal winding (4) has a distal end (2) and a proximal winding (5) has a proximal end (3). Each of the winding has an outwardly pointing surface (6) together forming an outside surface of the torsion spring being parallel to the longitudinal direction (X).

Abstract: The present invention relates to a torsion spring driven injection device for delivering multiple set doses of a liquid drug from a cartridge by moving a plunger forward inside the cartridge. The torsion spring (134) applies a rotational torque onto a drive member (120) engaging a piston rod (115) which is then driven forward by this rotation. The piston rod driver can be coupled and de-coupled from the torsion spring mechanism. In the de-coupled position, the piston rod driver is freely rotatable and can thus rotate if the piston rod is moved axially. A further torsion arrangement (124) is preferably provided such that a torque is build up between the piston rod driver and the housing whenever the piston rod is moved backwards. This torsion arrangement urges the piston rod driver to rotate in a direction bringing the piston rod forward into abutment with the plunger.

Abstract: The present invention relates to an injection device for automatic torsion spring driven injection of a liquid drug. The injection device is of the type wherein a telescopically movable needle shield activates the release of the torque of the torsion spring to drive the injection when the needle shield is moved from its extended position to a retracted position. The injection device further has a needle holder carrying the injection needle, which needle holder is axially movable both in relation to the housing and in relation to the needle shield. It is therefore possible to retract the needle shield in relation to the housing and at the same time move the needle holder to its extended position such that the injection needle is presented outside the needle shield thereby providing for easy exchange of the injection needle.

Abstract: The present invention relates to an injection device for automatic torsion spring driven injection of a liquid drug. The injection device is of the type wherein a telescopically movable needle shield (20) activates the release of the torque of the torsion spring to drive the injection when the needle shield is moved from its extended position to a retracted position. The injection device is provided with a needle interface (30) carrying the injection needle, which needle interface is provided with means (32) preventing axial movement of the shield when no injection needle is mounted. Further, other means are provided to restrain the needle shield in the retracted position when the injection device is its “zero” position such that a user has access to the injection needle in order to exchange the injection needle.

Abstract: A medical device is provided comprising a transcutaneous device unit and a process unit. The transcutaneous device unit may comprise a transcutaneous device for transporting a fluid through a skin portion of a subject, and a mounting surface adapted for application to the skin of the subject. The process unit may comprise a reservoir adapted to contain a fluid drug, the reservoir comprising an outlet means allowing the transcutaneous device to be arranged in fluid communication with an interior of the reservoir, and an expelling assembly for expelling a fluid drug out of the reservoir and through the skin of the subject via the transcutaneous device. The transcutaneous device unit and the process unit further comprise coupling means allowing the reservoir unit to be secured to the transcutaneous device unit in the situation of use. By this arrangement a two-unit system is provided which can be used in a convenient and cost-effective manner.

Abstract: An injection device comprising a housing and a dose setting mechanism including a dose setting element. Contrary to prior art injection devices, the dose setting element can only be set at a few different dose settings. This is established by forming the dose setting element as a rotatable dish concealed within the housing and having a number of projections projecting outside the boundaries of the housing through a slot in the housing. A dose is set by activating a projection which in addition provides the user with a tactile guidance. Usually one projection is provided for one dose setting limiting the number of doses to be set to the number of projections.

Abstract: The invention provides a fluidic system (100) comprising a permeable membrane (152), in which one side of the permeable membrane is in contact with a fluid, this lowering the partial pressure of a gas on the other side of the membrane being by raising the pressure of vapour from the fluid by diffusion from the fluidic system through the permeable membrane. This will aid in expelling a gas from a fluid assembly as well as reducing the likelihood of gas entering into the fluid assembly.

Abstract: The invention provides a pump assembly comprising an actuator lever, a supporting structure, a pump comprising a pump member moveable by actuation of the actuator lever, and an actuator for moving the actuator lever. A first stationary pivoting joint is formed between the actuator lever and the supporting structure, and a second floating pivoting joint is formed between the actuator lever and the pump member allowing the pump member to float relative to the actuator lever, the floating pivoting point providing a constant-length actuator arm defined between the first pivoting joint and the second pivoting joint.

Abstract: The invention provides a pump assembly comprising an actuator lever, a supporting structure, a pump comprising a pump member moveable by actuation of the actuator lever, and an actuator for moving the actuator lever. A first stationary pivoting joint is formed between the actuator lever and the supporting structure, and a second floating pivoting joint is formed between the actuator lever and the pump member allowing the pump member to float relative to the actuator lever, the floating pivoting point providing a constant-length actuator arm defined between the first pivoting joint and the second pivoting joint.

Abstract: An injection device comprising a housing and a dose setting mechanism including a dose setting element. Contrary to prior art injection devices, the dose setting element can only be set at a few different dose settings. This is established by forming the dose setting element as a rotatable dish concealed within the housing and having a number of projections projecting outside the boundaries of the housing through a slot in the housing. A dose is set by activating a projection which in addition provides the user with a tactile guidance. Usually one projection is provided for one dose setting limiting the number of doses to be set to the number of projections.

Abstract: An injection device comprising a housing and a dose setting mechanism including a dose setting element. Contrary to prior art injection devices, the dose setting element can only be set at a few different dose settings. This is established by forming the dose setting element as a rotatable dish concealed within the housing and having a number of projections projecting outside the boundaries of the housing through a slot in the housing. A dose is set by activating a projection which in addition provides the user with a tactile guidance. Usually one projection is provided for one dose setting limiting the number of doses to be set to the number of projections.

Abstract: The invention provides a reservoir unit with a reservoir arranged within a housing. The reservoir defines an interior adapted to contain a translucent fluid drug, and comprises a first transparent area. A second area is associated with the reservoir and arranged substantially opposite the first area, the second area comprising a visually non-uniform portion. The housing comprises an inspection portion allowing a user to inspect a portion of the reservoir through the first area with the second area serving as a background, the second area thereby serving as an aid for evaluating a condition of a drug contained in the reservoir, e.g. fibrillated insulin.

Abstract: The invention provides a pump assembly comprising a suction pump and a safety valve arranged between the pump inlet and a fluid inlet for the assembly. The safety valve comprises an inlet valve and a moveable control member acting on the safety inlet valve, wherein the control member is operatable between an initial position in which the safety inlet valve is closed, and an activated position in which the safety inlet valve is open, and wherein the control member is moved from the initial to the activated position by means of suction action from the pump. By this arrangement the opening of the safety valve is positively controlled by the suction provided by the pump whereas the safety valve is closed during non-operation of the pump.

Abstract: A limiting mechanism which prevents the setting of a dose, which exceeds the amount of liquid left in a cartridge of an injection device, is disclosed. The injection device is the type where a dose is set by rotating a dose setting member relative to a driver and away from a fixed stop in the injection device. The dose setting member interfaces the driver such that the dose setting member can be rotated in one direction without rotating the driver. The dose is injected by rotating back the dose setting member which during the backward rotation carries the driver with it. Rotating the driver causes the piston rod to move forward inside the cartridge and expel some of the liquid contained in the cartridge. The driver is provided with a track having a length which is related to the total amount of liquid in the cartridge and which track is engaged by a track follower coupled to the dose setting member to follow rotation of this dose setting member.

Abstract: The present invention provides an injection syringe comprises a housing including a holder for containing a cartridge of medicine, a piston rod with a non-circular cross-section having an outer thread, a piston rod drive, a one way coupling having an annular ring of internal ratchet notches, which annular ring can be integral with the housing, and a pawl having at least a pair of resilient arms each having a free end.