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injection device

A technology of injection device and cartridge, applied in the directions of syringes, ampoule syringes, hypodermic injection devices, etc., can solve problems such as discarding, and achieve the effect of simplifying modification

Active Publication Date: 2020-12-11
SANOFI AVENTIS DEUT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In contrast, single-use types of injection devices are discarded when the cartridge has been dispensed or used up

Method used

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Experimental program
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Embodiment Construction

[0142] figure 1 , 7 The injection device 10 shown in , 8 is configured as a pen injector. It comprises an elongated housing 11 extending in a longitudinal or axial direction. Towards the distal direction 1 , the injection device 10 comprises a distal housing part designated as a cartridge holder 20 . In the opposite longitudinal direction, the housing 11 comprises a second housing part, designated body 30 . Both housing parts, namely the cartridge holder 20 and the main body 30, have a tubular and elongated shape. The cartridge holder 20 is configured to accommodate a cartridge 50 comprising a tubular barrel 51 and filled with a liquid medicament 53 . At the distal end, the cartridge 50 includes a pierceable seal 54, which generally includes a pierceable septum formed of an elastomeric material.

[0143] At the opposite proximal end, the cartridge 50 is sealed by a piston 52 , which is slidably arranged inside the cartridge 50 . For dispensing a dose 53 of liquid medicam...

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PUM

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Abstract

The present disclosure relates to an injection device for delivery of a liquid medicament including a housing, a cartridge having a tubular shaped barrel filled with a liquid medicament and sealed in a proximal direction by a piston displaceably arranged in the barrel, and a drive mechanism having a piston rod to advance in a distal direction against a proximally facing surface of the piston of the cartridge. The drive mechanism is configured to advance the piston rod in the distal direction by a distance z1 to dispense a reference volume V1 of the medicament when operably engaged with a reference cartridge having a reference diameter D1, and, the cartridge has a diameter D2 smaller than the reference diameter D1 to dispense a volume V2 of the medicament smaller than the reference volume V1 when the piston rod advances in distal direction by the distance z1.

Description

technical field [0001] The invention in one aspect relates to injection devices, such as pen injectors operable to set and dispense doses of medicament. In particular, the present invention relates to liquid medicament filled cartridges having a reduced diameter compared to standard sized cartridges traditionally used in connection with pen injection devices. In another aspect, the invention relates to a method of improving the dosing accuracy of an injection device. Background technique [0002] Injection devices for setting and dispensing single or multiple doses of liquid medicaments are well known in the art. In general, these devices serve a generally similar purpose to ordinary syringes. [0003] Injection devices, especially pen injectors, are subject to many user-specific requirements. For example, a patient has a chronic disease such as diabetes, may be frail, and may have visual impairment. Therefore, suitable injection devices, especially for home use, need to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M5/24A61M5/31A61M5/315
CPCA61M5/24A61M5/3129A61M5/31551A61M5/31573A61M5/31585A61M2005/2492A61M2005/2407A61M2005/3126A61M5/31556A61M5/31541
Inventor A·博德
Owner SANOFI AVENTIS DEUT GMBH