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One shot injector with dual springs

A device and container technology, applied in the field of injection devices, can solve problems such as inability to use

Inactive Publication Date: 2010-03-31
SHL GRP AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] This design can be used for long strokes, but cannot be used when higher forces are required

Method used

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  • One shot injector with dual springs
  • One shot injector with dual springs
  • One shot injector with dual springs

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] The embodiment of the syringe shown in the drawings comprises an elongated housing 10 with a front end 12 on the left of the drawing and an opposite rear end 14 which, during use, presses against the injection site, as will as described below. A generally tubular needle shield 16 is slidably disposed at the forward end of the housing. The rear end of the needle shield extends into the rear of the housing in the manner described below.

[0030] Inside the needle shield is arranged a medicament container holder 18 within which is arranged a container 20 such as a medicament cartridge, syringe containing medicament to be administered through a needle 22 attached to the container.

[0031] The rear of the container holder is provided with a tongue 24 having an inwardly facing protrusion 26 . These projections cooperate with the outwardly facing peripheral projections 28 of the generally tubular portion 30 to form a snap fit between these components. An inwardly facing an...

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Abstract

The present invention relates to a medical delivery device comprising a generally elongated housing, a container containing medicament to be delivered, a drive means capable of acting on said container for expelling said medicament, wherein said drive means comprises at least two force spring means arranged between a fixed part of the device and a movable part of the device.

Description

technical field [0001] The present invention relates to an injection device, and more particularly to an injection device capable of handling a medicament in the form of a highly viscous fluid. Background technique [0002] The present invention relates to an injection device for injecting medicaments and other types of fluids such as are used in orthopedic treatments. [0003] Drugs of this type are often highly viscous, which means that a lot of force is required to push the fluid through the hollow needle when injected. [0004] Auto-injectors with automatic injection are typically used with a helically wound compression spring which acts on a plunger rod which in turn acts on a stop in the medicament container for passing the medicament through The attached needle ejects. The other end of the spring typically abuts the inner end surface of the device housing, which means that the housing must be sized to push the spring. [0005] This situation becomes more pronounced...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/20
CPCA61M5/326A61M5/2033A61M2005/31518A61M2005/206A61M5/3204A61M5/3202A61M2005/2013
Inventor 维克托·克罗内斯特德
Owner SHL GRP AB
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