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Spring assisted drug delivery device

A technology for delivering devices and medicines, applied in infusion sets, hypodermic devices, auto-injectors, etc., to achieve the effect of reducing thread pitch, reducing the range of selection action, and improving usability

Active Publication Date: 2016-07-13
SANOFI AVENTIS DEUT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a design flaw may go unnoticed when the pen is first marketed and only become apparent after the injection device has been in commercial use by patients for an extended period of time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0072] First refer to Figure 1 to Figure 3 The drug delivery device 1 is shown as a syringe pen having an elongated substantially writing tool-like form, but other forms are within the scope of the present invention. In other words, the drug delivery device 1 may be a pen-type device. The drug delivery device 1 includes a housing with a cartridge holder 2 and a main (outer) body or housing 4.

[0073] The drug delivery device 1 and the housing have a distal end and a proximal end. The term "distal" designates the end of the drug delivery device 1 or its components that is or will be arranged to be closest to the dispensing end of the drug delivery device 1. The term "proximal end" designates the arrangement of the device 1 or its components to be or will be arranged at the end furthest from the dispensing end of the device 1. The distal end and the proximal end are spaced apart from each other in the direction of the axis. The axis may be the longitudinal axis or the axis of ...

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PUM

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Abstract

A spring assisted drug delivery device (80, 90, 100) is provided comprising a housing (4) and a lead screw (22) having a longitudinal axis, a distal end and a proximal end that is rotatably fixed during dose setting and dose delivery and axially moveable in a distal direction relative to the housing. The device further comprises a drive nut (23) threadedly engaged and screwable along the lead screw threaded shaft and a number sleeve (24) threadedly engaged with the housing (4) to be screwable relative to the housing (4). A dial link (25) is connected with the drive nut (23) and axially moveable and rotatably fixed relative to the drive nut (23) and an inner sleeve (29) is threadedly engaged with the number sleeve (24), the inner sleeve (2) being axially moveable and rotatably fixed relative to the housing (4). A mid-body (20) is axially fixed inside of the housing (4). A spring (82, 92, 102) is provided that assists a user of the device during a dose administration step.

Description

Technical field [0001] This patent disclosure relates generally to pen-type injection devices and specifically to a dose setting mechanism for such drug delivery devices. This device provides self-service delivery of medical products from multi-dose cartridges and allows the user to set the delivery dose. The present disclosure can be applied to both disposable and reusable types of drug delivery devices. However, all aspects of the present invention can be equally applied in other occasions. Background technique [0002] The pen-type drug delivery device can be used in situations where routine injections are performed by personnel without formal medical training. This is becoming more and more common among patients with diabetes, where self-treatment allows such patients to effectively control their disease. Diabetes has been shown to cause certain problems. For example, people with diabetes can get high blood pressure, kidney disease, nerve damage, heart disease, and even b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/20A61M5/315
CPCA61M5/20A61M5/2033A61M5/3155A61M5/31551A61M5/31566A61M5/31578A61M5/3158A61M5/31585A61M5/31593A61M5/31561A61M5/3146A61M2005/2006A61M2005/2026A61M5/31558A61M5/31575A61M2005/3126
Inventor S·布兰克A·托伊舍M·尤格尔C·施奈德
Owner SANOFI AVENTIS DEUT GMBH
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