US 2019/0054239 A1Published application

Two-Step Auto-Injection Device

AssigneeChalbourne Brasington

InventorChalbourne Brasington

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Abstract

An auto-injection device for delivery of a fluid medicament is provided. The device includes an ampoule having a fluid medicament contained between first and second stoppers; a first sleeve movable along the longitudinal direction relative to the ampoule; a second sleeve at least partially surrounding the ampoule and movable along the longitudinal direction relative to the ampoule; and a needle. The first sleeve is movable along the longitudinal direction relative to the second sleeve and the ampoule between a first position and a second position. The needle is unexposed in the first position but exposed along the longitudinal direction in the second position. The second sleeve is also movable along the longitudinal direction relative to the ampoule between a first position and a second position. The needle is fluidly isolated from the medicament in the first position and is in fluid communication with the medicament in the second position.

Claims20

Dependent claims

An auto-injection device defining a longitudinal direction, the auto-injection device comprising:

an ampoule, the ampoule comprising a fluid medicament contained between a first stopper located towards a proximal end of the ampoule and a second stopper located towards a distal end of the ampoule, wherein the first stopper includes a first recess located at a proximal edge of the first stopper a second recess located at a distal edge of the first stopper, wherein the second recess is disposed between the first recess and the second stopper and has a semi-circular shape in a longitudinal cross-sectional view;
a first sleeve movable along the longitudinal direction relative to the ampoule;
a second sleeve at least partially surrounding the ampoule and movable along the longitudinal direction relative to the ampoule, wherein the second sleeve is movable from a proximal end of the auto-injection device towards a distal end of the auto-injection device;
and
a needle located at the proximal end of the auto-injection device;
wherein the first sleeve is movable along the longitudinal direction relative to the second sleeve and the ampoule between a first position and a second position, wherein in the first position the needle is unexposed along the longitudinal direction and in the second position the needle is exposed along the longitudinal direction, and
wherein the second sleeve is movable along the longitudinal direction relative to the ampoule between a first position and a second position, wherein in the first position the needle is fluidly isolated from the fluid medicament and in the second position the needle is in fluid communication with the fluid medicament.

4 more elements

A two-step method for delivering a dose of fluid medicament via an auto-injection device, wherein the auto-injection device defines a longitudinal direction and comprises an ampoule containing a fluid medicament contained between a first stopper located towards a proximal end of the ampoule and a second stopper located towards a distal end of the ampoule, wherein the first stopper includes a first recess located at a proximal edge of the first stopper and a second recess located at a distal edge of the first stopper, wherein the second recess, is disposed between the first recess and the second stopper and has a semi-circular shape, in a longitudinal cross-sectional view;

a first sleeve movable in the longitudinal direction relative to the ampoule;
a second sleeve at least partially surrounding the ampoule and movable along the longitudinal direction relative to the ampoule, wherein the second sleeve is movable from a proximal end of the auto-injection device towards a distal end of the auto-injection device;
and a needle located at the proximal end of the auto-injection device;
the method comprising:
positioning the proximal end of the auto-injection device against a surface of skin, wherein the longitudinal direction of the auto-injection device is generally perpendicular to the surface of skin;
piercing the surface of skin and underlying tissue with a proximal end of the needle by pressing the proximal end of the auto-injection device against the surface of skin until the first sleeve moves from a first position to a second position in a first step;
and
delivering the fluid medicament by pressing the proximal end of the auto-injection device against the surface of skin until the second sleeve moves from a first position to a second position in a second step.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/681,876Filed 21 Aug 2017
Published: 21 Feb 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

A61M 5/24
Syringes: ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or cartridges, e.g. automatic
A61M 5/2033
Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically: spring-loaded one-shot…
A61M 5/3213
Means for protection against accidental injuries by used needles: caps placed axially onto the needle, e.g. equipped with finger protection guards
A61M 2005/2013
Having specific accessories: triggering of discharging means by contact of injector with patient body