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Drug delivery device with dual layer spring

A delivery device and drug technology, applied in the direction of spring, spring/shock absorber, coil spring, etc., can solve the problem of large axial size of the injection device, and achieve the effect of simple manufacturing

Inactive Publication Date: 2016-02-03
NOVO NORDISK AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as pointed out, this has an effect on the construction of the injection device in that it necessarily has a considerable axial dimension

Method used

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  • Drug delivery device with dual layer spring
  • Drug delivery device with dual layer spring
  • Drug delivery device with dual layer spring

Examples

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Embodiment Construction

[0042] When relative expressions such as "up" and "down" are used hereinafter, they refer to the drawings and not necessarily the actual usage situation. The shown figures are schematic diagrams, for which reason the configuration of the different structures as well as their relative sizes are intended for illustrative purposes only.

[0043] figure 1 and FIG. 2 relate to a first exemplary embodiment of the invention, wherein a first type of double spring pretensioning is incorporated into a single-shot injection device capable of delivering only one dose of drug, whereas Figure 3-Figure 5 It is directed to a second exemplary embodiment of the present invention, wherein a second type of double layer spring is incorporated into a multi-dose injection device capable of setting and delivering multiple doses of drug. It will be appreciated that both types of double layer springs are equally applicable to other injection device types as well as other types of drug delivery device...

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Abstract

The present invention relates to a drug delivery device (1, 100) comprising a drug expelling mechanism and a spring (10, 110) releasable during use of the drug delivery device (1,100) to convey stored energy to the drug expelling mechanism. The spring (10, 110) comprises a first helical portion (11, 111) and a second helical portion (13, 113) surrounding at least a portion of the first helical portion (11, 111).

Description

technical field [0001] The present invention relates to power assisted drug delivery devices, such as, for example, automatic injection devices. The present invention particularly relates to drug delivery devices using compact spring elements for delivering energy to expel drug from a reservoir. Background technique [0002] Drug delivery devices, such as injection devices, are widely used to infuse liquid drugs into persons in need of treatment. Many injection devices are capable of repeatedly setting and injecting fixed or variable volumes of medicament upon operation of corresponding dose settings in the device and dose ejection mechanisms. Some injection devices are adapted to hold pre-filled drug reservoirs containing a volume of drug sufficient to provide several injectable doses. When the reservoir is empty, the user replaces it with a new one, and the injection device can thus be used repeatedly. Other injection devices are delivered to the user pre-filled and can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/20F16F1/06A61M5/24
CPCA61M5/24A61M2005/2407F16F1/046F16F1/06A61M5/2033A61M5/31555A61M2005/2013
Inventor E.基勒里奇
Owner NOVO NORDISK AS
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