DEVICE FOR THE DOSED ADMINISTRATION OF A FLUID PRODUCT, ADAPTED FOR THE REPLACEMENT OF A CONTAINER

• US 20120111186A1
• Filed: 07/08/2011
• Published: 05/10/2012
• Est. Priority Date: 12/31/2004
• Status: Active Grant

• Current Assignee: Ypsomed AG (Ypsomed Holding AG)
• Original Assignee: TecPharma Licensing AG (Ypsomed Holding AG)
• Inventors: KOHLBRENNER, PHILIPPE, KUENZLI, DANIEL, MEIER, CHRISTOPH, STETTLER, PETER, WITTMANN, JUERGEN, WITTWER, MARTIN
• Granted Patent: US 9,057,369 B2
• Time in Patent Office: Days
• US Class Current: 92/3
• CPC Class Codes: A61M 2005/202 cocking means, e.g. to bias the main drive spring of an injector
• CPC Class Codes: A61M 2005/3125 specific display means, e.g. to indicate dose setting
• CPC Class Codes: A61M 2005/3126 Specific display means related to dosing
• CPC Class Codes: A61M 2005/3142 Modular constructions, e.g. supplied in separate pieces to be assembled by end-user
• CPC Class Codes: A61M 2005/3247 Means to impede repositioning of protection sleeve from needle covering to needle uncovering position
• CPC Class Codes: A61M 5/20 Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically A61M5/142 , A61M5/46 take precedence; hypodermic projectiles F42B12/54
• CPC Class Codes: A61M 5/24 Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic ampoules or carpules A61J1/06
• CPC Class Codes: A61M 5/31535 Means improving security or handling thereof, e.g. blocking means, means preventing insufficient dosing, means allowing correction of overset dose
• CPC Class Codes: A61M 5/31536 Blocking means to immobilize a selected dose, e.g. to administer equal doses
• CPC Class Codes: A61M 5/31543 piston rod reset means, i.e. means for causing or facilitating retraction of piston rod to its starting position during cartridge change
• CPC Class Codes: A61M 5/31553 without axial movement of dose setting member
• CPC Class Codes: A61M 5/31555 by purely axial movement of dose setting member, e.g. during setting or filling of a syringe
• CPC Class Codes: A61M 5/31558 using scaling up or down transmissions, e.g. gearbox
• CPC Class Codes: A61M 5/31561 using freely adjustable volume steps
• CPC Class Codes: A61M 5/31575 using scaling up or down transmissions, e.g. gearbox
• CPC Class Codes: A61M 5/31583 based on rotational translation, i.e. movement of piston rod is caused by relative rotation between the user activated actuator and the piston rod
• CPC Class Codes: A61M 5/31585 performed by axially moving actuator, e.g. an injection button
• CPC Class Codes: A61M 5/31593 Multi-dose, i.e. individually set dose repeatedly administered from the same medicament reservoir
• CPC Class Codes: A61M 5/3204 Needle cap remover, i.e. devices to dislodge protection cover from needle or needle hub, e.g. deshielding devices
• CPC Class Codes: A61M 5/3245 Constructional features thereof, e.g. to improve manipulation or functioning
• CPC Class Codes: A61M 5/3257 : Semi-automatic sleeve extension, i.e. in which triggering of the sleeve extension requires a deliberate action by the user, e.g. manual release of spring-biased extension means
• CPC Class Codes: A61M 5/326 : Fully automatic sleeve extension, i.e. in which triggering of the sleeve does not require a deliberate action by the user
• CPC Class Codes: F04B 49/106 : Responsive to pumped volume

Abstract

A device for administering a fluid product, the device including a first housing part provided with a receiver for the product, a second housing part detachably connectable to the first housing part, a piston rod held such that it can be displaced for the exertion of an emptying movement, an actuatable or releasable drive element for the piston rod, a coupling element including a coupling input element that couples the drive element to the piston rod in a coupling engagement, transmits a driving force of the drive element to the piston rod, and triggers the emptying movement, and a decoupling element displaceably connected to the second housing part and coupled to the first housing part such that it is displaced, by a movement of the housing parts in relation to each other when the housing parts are separated into a decoupling position wherein the piston rod is decoupled from the coupling input element.

Claims

1. A device for administering a fluid product, comprising a first housing part, a second housing part detachably connectable to the first housing part, a piston rod held such that it can be displaced for an emptying movement, an actuatable drive element for the piston rod, a coupling element including a coupling input element that couples the drive element to the piston rod in a coupling engagement, transmits a driving force of the drive element to the piston rod, and triggers the emptying movement, and a decoupling element displaceably connected to the second housing part and coupled to the first housing part such that it is displaced, by a movement of the housing parts in relation to each other into a decoupling position wherein the piston rod is decoupled from the coupling input element.

2. A device for administering a fluid product, said device including:

a) a first casing part comprising a reservoir for the product;

b) a second casing part detachably connected to the first casing part;

c) a piston rod movably held for exerting a delivery movement from the second casing part;

d) a drive member which can be operated for moving the piston rod;

e) a coupler comprising a coupler input member which couples the drive member to the piston rod in a coupler engagement and transfers a drive force of the drive member onto the piston rod and causes the delivery movement; and

f) a decoupling member movably connected to the second casing part and coupled to the first casing part such that it is moved into a decoupling position which decouples the piston rod from the coupler input member by a movement of the casing parts when the casing parts are moved relative to each other to be detached.

3. The device according to claim 2, further comprising a dosage display for displaying a settable product dosage, wherein the dosage display is coupled to the drive member such that a movement which the coupler input member performs when the product dosage is being set causes a change in the product dosage displayed, and wherein the decoupling member decouples the dosage display from the piston rod in the decoupling position.

4. The device according to claim 3, wherein the drive member is decoupled from the piston rod when the casing parts are connected and is not coupled to the piston rod until the drive movement is performed.

5. The device according to claim 4, wherein the coupler includes a restoring element which causes the decoupling, when the casing parts are connected, by exerting a restoring force acting counter to the drive movement.

6. The device according to claim 2, further comprising a dosing member coupled to the drive member for setting a product dosage which can be delivered by operating or triggering the drive member, wherein the decoupling member decouples the dosing member from the piston rod, in the decoupling position.

7. The device according to claim 2, wherein one of the decoupling member and the first casing part forms a guiding curve and the other forms an engaging element guided by the guiding curve, and wherein the guiding curve and the engaging element perform a movement determined by the guiding curve when the casing parts are detached relative to each other, said movement moving the decoupling member into the decoupling position.

8. The device according to claim 2, wherein one of the casing parts movably carries an adaptor structure, and wherein the adaptor structure is compulsorily moved relative to the casing part carrying the adaptor structure by a relative movement between the casing parts for connecting and detaching them.

9. The device according to claim 8, wherein one of the decoupling member and the adaptor structure forms a guiding curve and the other forms an engaging element guided by the guiding curve, and wherein the guiding curve and the engaging element perform a movement determined by the guiding curve when the casing parts are detached relative to each other, said movement moving the decoupling member into the decoupling position.

10. The device according to claim 8, wherein one of the casing parts fixes the adaptor structure in and counter to a direction of connecting and detaching the casing parts and movably carries the adaptor structure transverse to the direction of connecting and detaching.

11. The device according to claim 7, wherein the guiding curve extends, at least in part, at an angle of more than 0°

and less than 180°

relative to a direction of detaching the casing parts.

12. The device according to claim 2, wherein the decoupling member is fixed in a releasable locking engagement in the decoupling position.

13. The device according to claim 2, wherein the second casing part carries the decoupling member such that decoupling member can move in and counter to the direction of a coupler movement guiding into the coupler engagement.

14. The device according to claim 2, wherein the second casing part carries the decoupling member such that it can move rotationally transverse to the direction of a coupler movement guiding into the coupler engagement.

15. The device according to claim 2, wherein the decoupling member decouples the coupler input member from the piston rod in the decoupling position.

16. The device according to claim 15, wherein the drive member is in threaded engagement with one of the coupler input member or the second casing part and the drive movement of the drive member causes a rotational movement of the coupler input member.

17. The device according to claim 2, wherein the coupler input member is coupled by a threaded engagement to the piston rod such that a rotational movement of the coupler input member causes the delivery movement of the piston rod.

18. The device according to claim 2, wherein the decoupling member blocks the coupler input member in the decoupling position and prevents the coupler engagement.

19. The device according to claim 2, wherein the coupler comprises a coupler output member in engagement with the piston rod, and wherein a drive movement of the coupler output member causes the delivery movement of the piston rod.

20. The device according to claim 19, wherein the decoupling member decouples the coupler output member from the drive member in the decoupling position, but the coupler output member remains in engagement with the piston rod.

21. The device according to claim 19, wherein the coupler input member and the coupler output member are coupled to each other by the coupler engagement, and wherein the decoupling member decouples the coupler input member from the coupler output member in the decoupling position.

22. The device according to claim 2, wherein the device has a resting state in which the casing parts are connected together, and wherein, when in the resting state, the piston rod is fixed relative to the second casing part via the decoupling member such that the delivery movement is prevented.

23. The device according to claim 22, wherein when the decoupling member moves into the decoupling position, an engagement which fixes the piston rod relative to the second casing part is released.

24. The device according to claim 22, wherein the coupler input member establishes the coupler engagement when a coupler movement is performed and releases the fixation of the piston rod relative to the second casing part.

25. The device according to claim 2, wherein the coupler further comprises a coupler intermediate member which, in a blocking position, fixes the piston rod relative to the second casing part such that the delivery movement is prevented, and wherein the coupler intermediate member can be moved in the direction of a coupler movement guiding into the coupler engagement, out of the blocking position into a releasing position, and in the releasing position releases the piston rod for the delivery movement.

26. The device according to claim 25, wherein in the blocking position, the coupler intermediate member is in engagement with the decoupling member thereby fixing the piston rod and is released by the movement of the decoupling member into the decoupling position.

27. The device according to any claim 26, wherein the piston rod is linearly guided secured against rotating.