Unlock instant, AI-driven research and patent intelligence for your innovation.

Spring straining mechanism for torsion spring based device

A technology of torsion springs and delivery devices, which can be used in hypodermic injection devices, automatic injectors, syringes, etc., and can solve cumbersome problems

Pending Publication Date: 2020-07-24
NOVO NORDISK AS
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This may seem cumbersome, and some users may find it ergonomically challenging

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Spring straining mechanism for torsion spring based device
  • Spring straining mechanism for torsion spring based device
  • Spring straining mechanism for torsion spring based device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0051] When / if relative expressions are used hereinafter, such as "upper" and "lower", "left" and "right", "horizontal" and "vertical", "clockwise" and "counterclockwise", etc., these relative expressions are references to drawings and not necessarily actual usage. The shown figures are schematic representations, for which reason the configuration of the different structures and their relative dimensions are intended for illustrative purposes only.

[0052] figure 1 is an exploded view of a drug delivery device 1 according to an exemplary embodiment of the present invention. The drug delivery device 1 is a dual chamber device in the sense that it is capable of delivering substances from two parallel reservoirs through a single needle / skin interface. The basic part is an elongated housing 2 of elliptical cross-section, which extends along a general axis. The housing 2 houses the drug delivery mechanism and is fixedly connected to a cartridge holder 10 having a cartridge hold...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention concerns a drug delivery device (1) comprising: a housing (2) extending along a main axis, a torsion spring (5) comprising a first spring end (4) arranged stationarily with respect to the housing (2) and a second spring end (6) capable of rotation about the main axis, a rotatable shaft (80) extending along the main axis, the rotatable shaft (80) having a non-self-locking thread (81) and being axially fixed with respect to the housing (2), a spring end retainer (82) to which the second spring end (6) is attached, the spring end retainer (82) being rotationally fixed relative to the rotatable shaft (80), and a nut member (45) engaged with the non-self-locking thread (81), the nut member (45) being axially movable by translation relative to the housing (2) to thereby travel the non-self-locking thread (81) between a first position in which the torsion spring (5) is in a relaxed state and a second position in which the torsion spring (5) is in a strained state.

Description

technical field [0001] The present invention relates generally to medical devices, and more particularly to automated drug delivery devices including torsion spring powered drug ejection mechanisms. Background technique [0002] Drug delivery devices, such as injection devices, are widely used to administer liquid drugs to persons in need of therapeutic treatment. Many injection devices are capable of reproducible setting and injection of fixed or variable volumes of medicament upon operation of corresponding dose settings and medicament expulsion mechanisms in the device. Some injection devices are adapted to hold prefilled drug reservoirs containing a volume of drug sufficient to provide multiple injectable doses. When the reservoir becomes empty, the user will replace it with a new reservoir so that the injection device can be used again and again. Other injection devices are delivered to the user pre-filled and can only be used after the drug reservoir has been emptied...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/20
CPCA61M5/2033A61M5/2448A61M5/31583A61M2005/2013A61M2005/202A61M5/3204
Inventor N.M.詹森N.S.西古德松
Owner NOVO NORDISK AS