A drive mechanism for an injection device for setting and dispensing of a dose of a medicament includes an inner body fixable inside a housing of the injection device, the inner body including an elongated shaft extending in an axial direction. The elongated shaft includes an outer thread and a blocking structure on an outer circumference. The drive mechanism includes a tubular-shaped display member having an inner thread engaged with the outer thread of the inner body, a dose member axially displaceable between a dose setting position and a dose dispensing position relative to the inner body, and a blocking sleeve axially fixed to the dose member, rotationally fixed to the display member and including at least one blocking element to axially engage with the blocking structure to block an axial displacement of the dose member from the dose setting position towards the dose dispensing position.

A syringe including a barrel, a plunger moveably arranged within said barrel and a plunger rod for driving said plunger is provided. The syringe includes a first engagement member arranged at the plunger rod such that a longitudinal movement of the plunger rod yields a rotational movement of said first engagement member, said first engagement member including a grooved surface, and a second engagement member arranged at the barrel to engage with said grooved surface of the first engagement member such that feedback is given to a user as the plunger rod is moved relative to the barrel for driving said plunger. Wherein, for a given distance D travelled by the plunger rod relative to the barrel, a point of the grooved surface of the first engagement member moves a distance d, wherein dD.

A drive mechanism for an injection device includes an inner body fixable inside a housing. An elongated shaft of the inner body extends in an axial direction. The shaft includes an outer thread and a blocking structure on an outer circumference. A tubular-shaped display member has an inner thread engaged with the outer thread of the inner body (20). A dose member is axially displaceable between a dose setting position and a dose dispensing position relative to the display member. The dose member includes at least one blocking element displaceable, pivotable or bendable in radial direction between a blocking position and a release position and engageable with the blocking structure for inducing a radial displacement of the blocking element. In the blocking position, the blocking element axially abuts with the blocking structure and with the display member to block an axial displacement of the dose member from the dose setting position towards the dose dispensing position.

Methods for using precision low-dose, low-waste syringe configurations, which may have a reduced diameter lumen for dispensing 0.01 ml increments of contents. Methods may employ ergonomic attachments that improve the control and precision of the syringe. An attachment main body includes a gripping surface to permit a user to engage the attachment and move the attachment main body, and thus the syringe plunger relative to the syringe barrel using sliding movement. Methods may employ an assist feature on the attachment, which may be a traction wheel. Methods for using syringes with contents of higher viscosity may employ a pair of toothed pinion gears on a wheel and which cooperate with respective toothed racks formed on or fastened to the syringe body.

An adapter for releasably attaching a syringe to an injector. The adapter comprises a mounting mechanism positioned at a rear end of the adapter to mount the adapter in a desired position relative to a front wall of the injector; and a syringe carrier section adapted to seat at least a portion of the syringe. The syringe carrier section defines a first opening on a top thereof to allow placement of the syringe therein from the top and a second opening in a rear section thereof to allow the drive member of the injector to communicate forward force to the plunger. A cover portion extends over a rearward end of the first opening and has a first end configured to abut the flange of the syringe when the syringe is positioned within the syringe carrier section.

A medication delivery device includes a disposable portion and a reusable portion. The disposable portion includes a therapeutic agent delivery assembly, and the therapeutic agent delivery assembly includes a needle. The therapeutic agent delivery assembly is translatable from a stowed configuration to a deployed configuration. The reusable portion includes a first rack and pinion mechanism and a second rack and pinion mechanism. The first rack and pinion mechanism is actuatable to translate the therapeutic agent delivery assembly from the stowed configuration to the deployed configuration. The second rack and pinion mechanism is actuatable to translate a plunger and thereby cause the therapeutic agent delivery assembly to deliver a therapeutic agent from the needle.

A medication injection pen, comprising a housing, a dose set knob that rotates with respect to the housing during dose setting and dose correcting, and a driver selectively engaged with the dose set knob, the driver rotatably fixed with respect to the housing during dose setting and dose correcting, wherein the driver moves axially with the dose set knob during dose setting and dose correcting, and the driver rotates with the dose set knob during an injection.

The present invention relates to injectors, such as pen-type injectors, that provide for administration of medicinal products from a multidose-cartridge and permit a user to set the delivery dose. The injector may include a housing, a piston rod adapted to operate through the housing, a dose dial sleeve located between the housing and the piston rod, and a drive sleeve located between the dose dial sleeve and the piston rod. The dose dial sleeve may have a helical thread of first lead and the drive sleeve may have a helical groove of second lead. The first lead of the helical thread and the second lead of the helical groove may be the same.

Medication dispensing apparatuses for dosing-up and delivering a pre-set dosage of a fluid product include a housing; a dosing element moveable relative to the housing between a starting position and a dosed-up position; a drive system coupled to the dosing element operable to initiate or perform a dispensing operation; and a sub-dose preventing system for preventing or blocking a dispensing operation of the drive system when the dosing element has not reached the dosed-up position and for allowing or unblocking a dispensing operation of the drive system when or after the dosing element has reached the dosed-up position, wherein the sub-dose preventing system is operable to block a rotational movement in a circumferential direction of the medication dispensing apparatus of a drive element of the drive system corresponding to a dispensing direction or a dial-down direction when preventing or blocking the dispensing operation of the drive system.

An injector apparatus includes a housing (10.sup.1, 10.sup.2) for a cartridge or syringe, a plunger (40) for cooperating in use with the cartridge or syringe to express successive doses, a dose setting arrangement (16, 20) to select a dose volume, and a drive mechanism (22, 24) releasable to advance the plunger in respective predetermined increments of magnitude to express the successive doses. The drive mechanism includes a drive spring (22) for imparting movement directly or indirectly to the plunger (40), and the dose setting arrangement includes a dose setting element (16) moveable in a dose setting routine to define a magnitude of an increment of movement of the plunger for a given dose. The drive mechanism further includes a clutch arrangement (56) operable during the dose setting routine to inhibit forward movement of the plunger and/or to isolate the dose setting element from the force of the drive spring.