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1. (WO2012032411) SKIN-PATCH AUTOMATIC INJECTION DEVICE
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Claims

1. An injection device securable to the body of a user for automatic administration of a fluid substance comprising:

a housing,

a fluid reservoir comprising a piston slideable along a longitudinal axis to expel fluid substance from the reservoir,

a holder to accommodate the fluid reservoir, the holder movably coupled to the housing,

a cannula or hollow needle extending from the injection device,

a drive mechanism to force fluid substance from the reservoir into the cannula or hollow needle to administer the fluid substance,

a triggering mechanism comprising a release element, and

a control device functionally coupled to the triggering mechanism and the drive mechanism, wherein the control device is movable along said longitudinal axis relative to the housing, wherein

by the activation of the triggering mechanism by moving the release element the control device is moved from a first position to a second position thereby releasing the drive mechanism, and

upon completion of the administration of fluid substance the control device is moved from the second to a third position producing an acoustic noise upon reaching the third position, and

the movements of the control device are opposite the direction of the movement of the piston during administration.

2. The injection device of claim 1 wherein the injection device is adherable to skin.

3. The injection device of claim 1, wherein the control device is a control sleeve.

4. The injection device of claim 3, wherein the movement of the control sleeve is assisted by a spring.

5. The injection device of claim 1, wherein the movement of the control device from said second to said third position is a movement relative to the reservoir.

6. An injection device securable to the body of a user for automatic administration of fluid substances comprising

a housing,

a fluid reservoir comprising a piston slideable along a longitudinal axis to expel fluid substance from the reservoir,

a holder to accommodate the fluid reservoir, the holder movably coupled to the housing,

a cannula or hollow needle extending from the injection device,

a drive mechanism comprising a plunger and a spring acting on the plunger to force fluid from the reservoir into the cannula or hollow needle to administer fluid substance,

a triggering mechanism comprising a release element and

a control device operably coupled to the triggering mechanism and the drive mechanism, wherein the control device is movable along said longitudinal axis relative to the housing, wherein by the activating of the triggering mechanism by moving the release element the control device is moved from a first position to a second position thereby releasing the drive mechanism, and wherein the drive mechanism further comprises a brake capable of decelerating the drive mechanism.

7. The injection device of claim 6, wherein the brake comprises:

a sleeve shaped guide in an axially secured position relative to the injection device, and

an additional element carried by the plunger for cooperating with the sleeve shaped guide, wherein

the additional element cooperates with the sleeve shaped guide during said administration of fluid substance to create a braking effect.

8. The injection device of claim 7, wherein the sleeve shaped guide and the additional element are disposed coaxially and wherein the sleeve shaped guide surrounds the additional element at least partially before said administration is started.

9. The injection device of claim 8, wherein the sleeve shaped guide comprises an at least partially threaded inner surface and wherein the additional element comprises an at least partially threaded outer surface which is in threaded engagement with said threaded inner surface, said threaded engagement creating said braking effect.

10. The injection device of claim 8, wherein

the sleeve shaped guide comprises at least two cams disposed on an inner surface of said sleeve shaped guide, wherein the cams are disposed roughly at the same axial position on the sleeve shaped guide and opposite each other on the inner circumference of the sleeve shaped guide, and

the additional element comprises an at least partially threaded outer surface, whereby the threads of the additional element engage alternatingly the two cams during said administration thereby forming said brake.

11. The injection device of claim 6, wherein the brake is a frictional brake.

12. An injection device for automatic administration of fluid substances, comprising: a housing comprising a base plate securable to the user's skin by an adhesive patch,

a fluid reservoir comprising a piston slideable along a longitudinal axis to expel fluid substance from the reservoir,

a holder for accommodating the fluid reservoir, the holder movably coupled to the housing,

a cannula or hollow needle extending from the injection device,

a drive mechanism for sliding the piston to force the fluid substance from the reservoir into the cannula or hollow needle to administer the fluid substance or a portion thereof,

a triggering mechanism comprising a release element, wherein the administration of fluid substance is started by moving the release element, and

an unlocking element movably mounted on the base plate and extending therefrom in an initial position, said unlocking element functionally coupled to the triggering mechanism, wherein

in the initial position the unlocking element blocks movement of the release element therefore preventing administration of fluid substance,

upon securing the injection device to the user's skin the unlocking element is moved by the user's skin in a direction substantially perpendicular to the base plate into the housing into a second position, and

in the second position the unlocking element allows movement of the release element.

13. The injection device of claim 12, wherein the triggering mechanism further comprises a slideable locking slide disposed on housing, thereby covering the release element in an initial position to prevent unintended start of said administration.

14. The injection device of claim 13, wherein the unlocking element is an unlocking bolt, and the triggering mechanism further comprises a lock element functionally coupled to said locking slide, wherein upon moving of said unlocking bolt from said first position to said second position the lock element is moved out of engagement with the said locking slide thereby enabling a start of said administration of fluid substance.

15. The injection device of claim 12, wherein the unlocking element has to be rotated about an axis perpendicular to the base plate prior to be moved from said first position to said second position.

16. An injection device for automatic administration of fluid substances, comprising: a housing comprising a base plate, wherein the base plate is securable to the user's skin by an adhesive patch,

a fluid reservoir comprising a piston slideable along a longitudinal axis to expel fluid substance from the reservoir,

a holder for accommodating the fluid reservoir, the holder movably coupled to the housing by a pivoting mechanism,

a cannula or hollow needle extending from the injection device,

a drive mechanism for forcing fluid from the reservoir (18) into the cannula or hollow needle to administer fluid substance, and

a triggering mechanism comprising a release element and a lock element, wherein said administration of fluid substance is started by moving the release element, the holder is pivotable from a first position relative the housing in which the fluid reservoir can be inserted into the holder to a second position in which the fluid reservoir is aligned with the drive mechanism to enable administration of fluid substance,

the holder further comprises a closure lock lever which prevents movement of the holder from said first position to said second position before the reservoir is

accommodated in the holder,

as the holder is pivoted from said first position to said second position the lock element is moved out of a blocking engagement with the triggering mechanism by the holder, and

administration of substance may only be started after the holder is moved from the first to the second position.

17. A control device for a device for administering a substance, the device having a longitudinal axis, a drive mechanism, and a triggering mechanism comprising a release element, wherein actuating the triggering mechanism by moving the release element causes control device to move along said longitudinal axis from a first position to a second position thereby releasing the drive mechanism and to move from the second to a third position producing an acoustic signal upon reaching the third position.

18. The control device of claim 17, wherein the device for administering further comprises a reservoir and a piston movably in the reservoir, and wherein the movements of the control device are opposite the direction of movements of the piston during an administration.

19. The control device of claim 17, wherein the control device comprises a sleeve.

20. The control device of claim 19, wherein the movement of the sleeve is assisted by a spring.

21. The control device of claim 20, wherein the device for administering further comprises a brake.

22. The control device of claim 21, wherein the brake comprises a guide in an axially secured position relative to the device for administering and an element associated with the drive mechanism and cooperable with the guide, the cooperation of the guide and element creating a braking effect during an administration.