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Injection device for delivery of a liquid drug

A technology of injection device and liquid medicine, applied in the direction of medicine equipment, syringe, automatic injector, etc., can solve the problems of wrong operation of the content termination mechanism and inability to discharge injectable content, etc.

Pending Publication Date: 2022-07-15
NOVO NORDISK AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this type of insulin injection device, it is therefore not an option to use a part of the free length of the piston rod for zero point adjustment, since then the free length over which the piston rod can move during expulsion would be too short to expel the entire injectable content, Incorrect operation of the mechanism causing the contents to terminate

Method used

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  • Injection device for delivery of a liquid drug
  • Injection device for delivery of a liquid drug
  • Injection device for delivery of a liquid drug

Examples

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Embodiment Construction

[0099] When terms such as "up" and "down", "right" and "left", "horizontal" and "vertical", "clockwise" and "counterclockwise" or similar relative expressions are used, these are for reference only The attached drawings do not represent actual usage. The figures shown are schematic representations and thus the configuration of the various structures and their relative dimensions are intended for illustration purposes only.

[0100] In this context, it is convenient to define that the term "distal end" in the figures means the end of the injection device that secures the needle cannula and points towards the user during injection, while the term "proximal end" means the opposite end department, such as Figure 2A -B shown. Distal and proximal mean along the axial orientation extending along the longitudinal axis (X) of the injection device, also as Figures 2A-2B disclosed in.

[0101] When reference is made to a clockwise direction and a counter-clockwise or counter-clockw...

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Abstract

The present invention relates to a pre-filled injection device with a non-removable cartridge, in which the drive mechanism comprises a threaded piston rod that moves helically in a nut fixed to the housing structure. During assembly of the injection device, the nut member may be rotated to advance the piston rod to a position that eliminates any air gap that may be present between the piston rod and a plunger within the cartridge.

Description

technical field [0001] The present invention relates to a prefilled injection device for delivering a dose or preferably multiple doses of a liquid drug. The present invention particularly relates to an injection device in which the distance that exists between the piston rod of the plunger moving within the cartridge and the plunger itself has been eliminated, or at least significantly, prior to delivery of the prefilled injection device to the end user. decrease. [0002] In a second aspect, the present invention relates to a method of assembling a prefilled injection device with such zero point adjustment. Background technique [0003] Injection devices are well known and used in the treatment of many different diseases, especially in the field of diabetes. A very popular type of injection device is the so-called disposable or prefilled injection device. Injection devices of this type typically contain a cartridge containing a predetermined amount of liquid drug to be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/24A61M5/32A61M5/315A61M5/20A61M5/31
CPCA61M2005/2073A61M2005/2013A61M5/24A61M2005/3267A61M5/326A61M5/31585A61M5/31515A61M5/3146A61M2207/00
Inventor N·M·维拉德森B·克沃斯伯格
Owner NOVO NORDISK AS
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