DUAL-FUNCTION SPRING

• US 20110054412A1
• Filed: 08/26/2010
• Published: 03/03/2011
• Est. Priority Date: 02/29/2008
• Status: Active Grant

• Current Assignee: Ypsomed AG (Ypsomed Holding AG)
• Original Assignee: TecPharma Licensing AG (Ypsomed Holding AG)
• Inventors: Meier, Stefan, Hostettler, Patrick, Horisberger, Aurèle, Eich, Adrian, Wittmann, Jürgen, Stettler, Peter, Kladiwa, Malte
• Granted Patent: US 8,992,487 B2
• Time in Patent Office: Days
• US Class Current: 604/207
• CPC Class Codes: A61M 2005/202 cocking means, e.g. to bias the main drive spring of an injector
• CPC Class Codes: A61M 2005/2086 having piston damping means, e.g. axially or rotationally acting retarders
• CPC Class Codes: A61M 2005/2403 Ampoule inserted into the ampoule holder
• CPC Class Codes: A61M 2005/2407 from the rear
• CPC Class Codes: A61M 2005/2433 Ampoule fixed to ampoule holder
• CPC Class Codes: A61M 2005/244 by flexible clip
• CPC Class Codes: A61M 2005/2477 comprising means to reduce play of ampoule within ampoule holder, e.g. springs
• CPC Class Codes: A61M 2005/2481 comprising means for biasing the ampoule out of the ampoule holder
• CPC Class Codes: A61M 2005/2488 via rotation, e.g. threads or bayonet
• 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 5/3129 Syringe barrels A61M5/3205 and A61M5/50 take precedence
• CPC Class Codes: A61M 5/31541 Means preventing setting of a dose beyond the amount remaining in the cartridge
• 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 5/31558 using scaling up or down transmissions, e.g. gearbox
• CPC Class Codes: A61M 5/31561 using freely adjustable volume steps
• CPC Class Codes: A61M 5/31583 based on rotational translation, i.e. movement of piston rod is caused by relative rotation between the user activated actuator and the piston rod

Abstract

An injection device for dispensing a product, the injection device including a moveable element which is moved for a dispensing operation, a spring, a product container holder and a product container, wherein the spring pushes against the moveable element to move the moveable element to an initial position after the dispensing operation has ended and against the product container to seat the product container in the product container holder.

Claims

1. An injection device for dispensing a product, the injection device comprising a moveable element which is moved for a dispensing operation, a spring, a product container holder and a product container, wherein the spring pushes against the moveable element to move the moveable element to an initial position after the dispensing operation has ended and against the product container to seat the product container in the product container holder.

2. The injection device as claimed in claim 1, wherein the spring is disposed between the moveable element and the product container.

3. The injection device as claimed in claim 2, wherein the spring is one of a separate part or a part formed by the moveable element.

4. The injection device as claimed in claim 1, wherein the spring acts on the product container directly or via a retainer.

5. The injection device as claimed in claim 4, wherein at least one of the spring and the retainer comprises a stop which prevents the spring from fully relaxing when no product container is inserted.

6. The injection device as claimed in claim 1, wherein the moveable element comprises part of a coupling and is moved out of the coupling for a dispensing operation.

7. The injection device as claimed in claim 1, wherein the moveable element is able to move axially relative but not rotate.

8. The injection device as claimed in claim 1, further comprising an output element which acts on the product to be dispensed to dispense the product via a plunger which is moveably accommodated in the product container, and the moveable element is coupled with the output element so that it blocks a dispensing movement of the output element when the injection device is in a non-secured state.

9. The injection device as claimed in claim 8, wherein the dispensing movement of the output element is a rotating movement.

10. The injection device as claimed in claim 8, further comprising an axially displaceable operating element which can be operated by a user of the injection device, wherein, when the operating element is operated, the moveable element is moved axially so that the output element is released for a movement in or opposite a dispensing direction.

11. The injection device as claimed in claim 8, further comprising a locating element which can be moved in an engaged connection to the output element and between a first position and a second position, and the output element is uncoupled from the moveable element in the first position so that the output element can be moved in or opposite a dispensing direction.

12. The injection device as claimed in claim 11, wherein the locating element is coupled with a fixing device so that it is moved axially when the product container is being secured or released.

13. The injection device as claimed in claims 10, wherein the operating element can be re-set by the spring.