INJECTION DEVICE WITH TENSIONING SPRING AND TENSIONING ELEMENT

• US 20090259181A1
• Filed: 10/10/2008
• Published: 10/15/2009
• Est. Priority Date: 04/12/2006
• Status: Active Grant

• Current Assignee: Ypsomed AG (Ypsomed Holding AG)
• Original Assignee: TecPharma Licensing AG (Ypsomed Holding AG)
• Inventors: Moser, Ulrich
• Granted Patent: US 8,343,103 B2
• Time in Patent Office: Days
• US Class Current: 604/135
• CPC Class Codes: A61M 2005/202 cocking means, e.g. to bias the main drive spring of an injector
• CPC Class Codes: A61M 2005/2437 by clamping means
• CPC Class Codes: A61M 2005/2444 by thread
• CPC Class Codes: A61M 2205/581 by audible feedback
• CPC Class Codes: A61M 5/2033 Spring-loaded one-shot injectors with or without automatic needle insertion multishot dosing syringes A61M5/31525, needle insertion only A61M5/3287
• CPC Class Codes: A61M 5/2066 comprising means for injection of two or more media, e.g. by mixing
• CPC Class Codes: A61M 5/2448 comprising means for injection of two or more media, e.g. by mixing
• CPC Class Codes: A61M 5/31515 Connection of piston with piston rod
• 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 5/31538 Permanent blocking, e.g. by medical personnel
• CPC Class Codes: A61M 5/3155 by rotational movement of dose setting member, e.g. during setting or filling of a syringe
• CPC Class Codes: A61M 5/3156 using volume steps only adjustable in discrete intervals, i.e. individually distinct intervals
• CPC Class Codes: A61M 5/31563 interacting with a displaceable stop member
• CPC Class Codes: A61M 5/31591 Single dose, i.e. individually set dose administered only once from the same medicament reservoir, e.g. including single stroke limiting means
• CPC Class Codes: A61M 5/31596 comprising means for injection of two or more media, e.g. by mixing

Abstract

An injection device including a receiving device movable in an insertion movement relative to the injection device, a tensioning element, e.g. a spring, which bears on a part of the injection device, and a coupling element for coupling the receiving device to the spring such that, during an insertion movement of the receiving device the spring is tensioned. In some embodiments, the invention encompasses a method for preparing an injection device for dispensing a substance from an ampoule, wherein a discharging spring of the injection device is tensioned by introduction of the ampoule into the injection device.

Claims

1. An injection device comprising a plunger rod, a container for a substance to be dispensed, wherein the container is able to be inserted in the injection device and, after being inserted, is moveable relative to the injection device, a dispensing spring supported on a part of the injection device, and a coupling element for coupling the container with the dispensing spring so that the spring is tensioned as the container is inserted, wherein, after insertion of the container, the tensioned spring acts on the plunger rod to cause an amount of the substance to be dispensed.

2. An injection device comprising a holder device for a substance to be dispensed, the holder device able to move relative to the injection device or a part thereof, a dispensing spring which can be supported on a part of the injection device and a coupling element for coupling the holder device with the dispensing spring so that the spring is tensioned when the holder device is introduced into the injection device, which spring is provided for acting on a plunger rod of the injection device to dispense a substance.

3. The injection device as claimed in claim 2, wherein the coupling element is sleeve-shaped.

4. The injection device as claimed in claim 2, wherein the coupling element comprises at least one catch element to connect the coupling element to at least one of the holder device and the plunger rod.

5. The injection device as claimed in claim 4, wherein the coupling element comprises a contact element with an obliquely extending surface.

6. The injection device as claimed in claim 5, wherein the coupling element is mounted on the plunger rod so that it is prevented from rotating.

7. The injection device as claimed in claim 2, wherein the holder device is coupled with the injection device by a thread.

8. The injection device as claimed in claim 2, wherein the holder device is an ampoule holder.

9. The injection device as claimed in claim 2, further comprising a dose setting ring which is locked until the ampoule has been fully inserted.

10. The injection device as claimed in claim 9, further comprising a trigger, wherein the trigger is extended from the injection device by the movement of the setting ring.

11. A method of preparing an injection device for dispensing a substance from an ampoule, the method including the step of tensioning a dispensing spring of the injection device by introducing the ampoule into the injection device.