Injection device

A technology of injection device and initial position, applied in the directions of syringes, ampoule syringes, hypodermic injection instruments, etc., can solve problems such as discarding, and achieve the effect of reliable failure

Active Publication Date: 2020-06-16
SANOFI AVENTIS DEUTSCHLAND GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conversely, disposable type injection devices are discarded when the medicament in the cartridge has been dispensed or used up

Method used

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  • Injection device
  • Injection device
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Examples

Experimental program
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Embodiment Construction

[0199] Such as figure 1 The illustrated injection device 1 comprises a tubular and elongated housing 10 . The injection device 1 may be configured as a prefilled disposable injection device. Alternatively, it may be configured as a reusable injection device.

[0200] The injection device 1 comprises a distal end to which a needle assembly 15 may be secured. The injection needle of the needle assembly 15 may be protected by an inner needle cap 16 and further protected by an outer needle cap 17 . The distal end of the injection device 1 is also covered by a protective cap 18 releasably engageable with the housing 10 of the injection device 1 . When attached to the injection device 1 , the protective cap 18 covers a part of the housing of the injection device 1 , also indicated as the cartridge holder 14 . The cartridge holder 14 is configured for receiving a cartridge 6 filled with a medicament. The cartridge 6 comprises a tubular barrel 25 . The barrel 25 is sealed in the...

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PUM

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Abstract

The present disclosure relates to an injection device for setting and injecting of a dose of a medicament, the injection device comprising: - an elongated housing (10) extending along a longitudinal axis (z), - a piston rod (20; 120) to operably engage with a piston (7) of a cartridge (6) filled with the medicament, - a dose tracker (60; 150; 250; 350; 450; 550) selectively operably engageable with the piston rod (20; 120), wherein the dose tracker (60; 150; 250; 350; 450; 550) is longitudinally displaceable relative to the housing (10) from an initial position (i) in a proximal direction (3)towards at least a first activation position (a) for setting of the dose and wherein the dose tracker (60; 150; 250; 350; 450; 550) is longitudinally displaceable relative to the housing (10) in a distal direction (2) from the at least first activation position (a) towards the initial position (i) for dispensing of the dose, - a spring (80; 140) to urge the dose tracker (60; 150; 250; 350; 450; 550) in the proximal direction (3) relative to the housing (10) - an interlock (84; 184; 284; 584) to lock the dose tracker (60; 150; 250; 350; 450; 550) in the initial position (i) relative to the housing (10), and - a release member (100, 101; 190; 290; 590) to release the interlock (84; 184; 284).

Description

[0001] illustrate [0002] One aspect of the present disclosure relates to an injection device, such as a pen injector, for setting and dispensing a dose of a medicament. In particular, the present invention relates to an injection device having a longitudinally displaceable dose tracker which is longitudinally displaceable relative to the housing of the device during dose setting and dispensing. In another aspect, the present disclosure relates to a mechanically implemented injection device that provides automatic dose setting according to a preselected dose format. Background technique [0003] Injection devices for setting and dispensing single or multiple doses of liquid medicaments are per se well known in the art. In general, such devices have a substantially similar purpose to ordinary syringes. [0004] Injection devices, in particular pen injectors, have to meet a number of user-specific requirements. For example, in the case of a patient suffering from a chronic d...

Claims

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Application Information

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IPC IPC(8): A61M5/315
CPCA61M5/24A61M5/31553A61M5/3156A61M5/31563A61M5/31575A61M5/31585
Inventor 迈克尔·赫尔默M·谢巴赫J·科斯汀
Owner SANOFI AVENTIS DEUTSCHLAND GMBH
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