Abstract: A pen-type injector for receiving a medication containing member. The injector comprises a housing 1 and a torsion spring 4 contained within the housing and coupled to a drive member 8. A dose setting knob 2 is coupled to the spring 4, and rotatably coupled to the housing 1 such that rotation of the knob relative to the housing in a first direction results in compression or twisting of the spring. A user actuable trigger 12 is provided for releasing the spring 4 to push the drive member 8 through the housing 1. A user actuable button 6 is coupled to the housing 1 for axial motion relative thereto, said button 6 being coupled to the torsion spring 4 to cause the spring to unwind or expand in discrete steps with each press of the button.

Abstract: An injection device operable to deliver a dose of medicament from a syringe or cartridge includes a temperature-sensitive arrangement for inhibiting operation thereof under predetermined temperature conditions. This may include a thermally responsive element that adopts a position in which operation of the device is inhibited when a temperature level is passed.

Abstract: An injection apparatus includes a counter wheel that is incremented by the dose delivery mechanism each time the device is fired. The apparatus includes a final dose disabling mechanism that prevents further usage once the final dose has been delivered. An anti-tamper feature is provided to prevent inadvertent or premature initialisation of the apparatus.

Abstract: An autoinjector includes front and rear separable housing parts 10, 12. These are connected by a rotary coupling action such as by bayonet coupling and the relative rotation action turns a needle shield 20 from a locked position in which it is both locked against longitudinal movement and acts as a shutter obscuring the contents of the syringe to an open position where the contents of the syringe are visible and the shield portion is freed for longitudinal movement. Connecting and securing the rear portion 12 on the front portion 11 therefore unlocks the needle shield 20 for operation. On completion of an injection, uncoupling of the front and rear portions returns the needle shield 20 to its locked position so the front portion may be disposed of safely.

Abstract: An injection apparatus includes a counter wheel (54) that is incremented by the dose delivery mechanism each time the device is fired. The apparatus includes a final dose disabling mechanism that prevents further usage once the final dose has been delivered. An anti-tamper feature is provided to prevent inadvertent or premature initialisation of the apparatus.

Abstract: An automatic injection device for providing a subcutaneous injection is disclosed. The device includes a syringe movably disposed in a housing and including a barrel portion, a needle and a bung for sealing the barrel portion. The device includes a plunger for moving the syringe towards a first open end of the housing such that the needle projects from the first end and subsequently applying pressure to the bung. The plunger includes a rod connected at a first end to the bung, a compressible expanded central portion, and a flange between a second end of the rod and the central portion. The device includes a biasing mechanism for biasing the plunger towards the first open end of the housing, the biasing mechanism disposed about the second end of the rod between the flange and the second end of the housing.

Abstract: A return spring arrangement for a lancet (6) is provided by a pair of undulating plastic webs (14) formed integrally with the lancet. The undulations of the two webs (14) are shown out of phase with one another. These webs (14) are flexible and thus are caused to concertina when the tips (15) of the webs hit the interior of a lancet holder on release of a drive spring. The energy stored within the collapsed webs (14) is then released to drive the lancet back within the lancet holder. This positive return of the lancet ensures that a needle (5) will retract safely into the lancet holder, after operation, and does not rely on the spring being locked into the lancet holder and onto the lancet.

Abstract: An injection device includes an elongate housing (10); a syringe (12) disposed in the housing and having an internal piston (20) to express a dose from a needle (16) at its front end; a trigger device (52) for, in use, activating the internal piston, and a cap (66) that, in a fitted configuration, fits over at least part of the elongate housing and prevents activation of the trigger device.

Abstract: A needle shield arrangement for a syringe (10), having a generally cylindrical body with a needle (16) at its forward end, includes a shield portion (20) adapted for shielding the needle (16); a syringe engaging portion (22) for engagement with the syringe body, and a frangible connecting portion (24) connecting the shield portion and the syringe engagement portion.

Abstract: An injection device includes an elongate housing (10), a syringe (12) disposed in the housing, and an internal piston (20) to express a dose from a needle (16) at its front end. The injection device further includes a shroud element (24) movable forwardly relative to the syringe to shroud the needle after use and a latch (74) movable between a latched state in which it restricts rearward movement of the shroud element, and a release state. The latch is moved to its latch state by a magnetic force (56).

Abstract: An injector 12 includes a plunger 17 for expelling drugs from a cartridge 10 which can be inserted into the injector 12. An actuator 27 is provided for operating an escapement mechanism 21 to control the movement of the plunger under a drive force and hence the expelled drug.

Abstract: A skin pricking apparatus including a casing 1, a lancet 15 located within the casing, a firing button 9 arranged to transfer a user applied force to the lancet 15 to drive the lancet through the casing 1, and lancet retaining element 12, 13, 23a,b arranged to substantially prevent movement of the lancet 15 through the casing 1 until the user applied force exceeds a predefined threshold force.

Abstract: A pen injection device designed for use with dual or multi-chamber cartridges 14, is provided with an extended length plunger 24 having a non-drive portion 24? on its forward end and the usual screw-threaded drive portion 24? on its rearward end. This arrangement allows the plunger to be pushed forwardly while the dosing drive mechanism is disengaged to effect a reconstitution movement of the rearward bung 18? in the cartridge. Thereafter the threaded portion on the plunger 24? engages the drive mechanism to allow metered dosing.

Abstract: An injection device for a syringe incorporates housing for a syringe. A needle shroud is captive to the leading end of the housing and is movable before use between extended and retracted positions. A drive member is releasable from a rearward position within the housing to urge the syringe forwards to project its needle beyond the retracted needle shroud and then to express a dose through the needle. Locating members on the housing capture the drive member at its forward position (attained after expressing the dose). The captured drive member is also arranged to block retraction of the needle shroud from its extended position.

Abstract: A lancet body for a skin pricker has resiliently flexible fingers (9) with outwardly splayed tips (10). The device is fired by pressing a trigger (13) and a spring (5) urges the lancet forwards and the fingers (9) flex inwards as the tips (10) snap past barbs (11), so that the tips (10) of the arms (9) engage behind the barbs (11). If the user tries to push the lancet back into the cocked condition, the fingers (9) are trapped and will flex as the tips (10) press against the barbs (11) until the arms buckle and the tips (10) are pushed out through openings (14). Thus the lancet is arrested and immobilized before a re-cocked position is reached, and re-firing is prevented.

Abstract: There is provided a lancet firing device comprising a projection, configured to project into an interior cavity of a lancet body when a lancet having a lancet body is loaded into the firing device; and means to grip an inner wall of the lancet body, the means being disposed on the projection.

Abstract: When a trigger of an injection device is released, a main spring (4) expands, driving a member (7) forwards. This compresses a weak spring (11), but a spring (5) is stiff enough to remain expanded. A syringe (2) is thus thrust forwards via a collar (9), so that a needle (3) projects from a barrel (1). The spring (4) continues to expand after the syringe has reached its forward position, with the spring (11) fully compressed, so that the stem (8) of the member (7) acts on a piston (14) within the syringe (2), to expel the dose while the spring (5) is caused to be compressed. The spring (5) ensures that the syringe is retained in its forward position during this phase.

Abstract: An injection apparatus includes a counter wheel (54) that is incremented by the dose delivery mechanism each time the device is fired. The apparatus includes a final dose disabling mechanism that prevents further usage once the final dose has been delivered. An anti-tamper feature is provided to prevent inadvertent or premature initialisation of the apparatus.