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Safety device for an injection syringe

A safety device and syringe technology, applied to hypodermic injection devices, devices introduced into the body, needles, etc., can solve problems such as unfavorable injection, and achieve the effect of improving reproducibility and standardization

Active Publication Date: 2016-01-20
F HOFFMANN LA ROCHE & CO AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is detrimental to the ability to inject very small amounts of fluid, especially for infants or children, because the safety device is activated when the user pushes the plunger to remove air bubbles or reduce the amount of fluid contained in the syringe body , can no longer inject the drug in the syringe

Method used

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  • Safety device for an injection syringe
  • Safety device for an injection syringe
  • Safety device for an injection syringe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0045] The invention will now be described with reference to specific embodiments of the invention. However, this invention may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough, and will fully convey the scope of the invention to those skilled in the art.

[0046] Figure 1 to Figure 4 A preferred embodiment of an assembled whole 10 of safety device 12 and prefilled syringe 14 is shown in FIG.

[0047] exist figure 1 In the embodiment, the syringe 14 includes a tubular syringe body 16 constituting a container for a liquid. The body 16 has an open proximal end 16P provided with a collar 20 and a generally conical distal end 16D converging away from the proximal end 16P, having an injection needle 18 mounted thereon. For example, the syringe body 16 is made of a glass material, but may also be made of plastic.

[0048] The syringe 14 also...

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PUM

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Abstract

The invention relates to a safety device (12) for an injection syringe (14), the injection syringe comprising a body (16) having an injection needle (18) fitted thereon, the device (12) comprising a plunger rod (22, 28) including a distal plunger part (28D) slidably movable in the body (16) of the syringe, and a proximal triggering part (28P), configured to trigger the displacement of a protection sheath (24), from an injection position, wherein the needle (18) is uncovered, towards a safety position, wherein the needle (18) is covered by the sheath (24). The proximal triggering part (28P) is able to move relative to the distal plunger part (28D) once the distal plunger part is at the distal end of its stroke, to trigger the displacement of the protection sheath (24).

Description

technical field [0001] The present invention relates to the field of safety devices for liquid syringes, especially prefilled syringes. Background technique [0002] Prefilled liquid syringes are known in the art. The syringe comprises a tubular body constituting a container for a liquid and at its distal end a needle or a fixing fitting for fixing the needle carrier on the syringe body is mounted. The syringe also includes a piston sealingly movable within the syringe body. Typically, the piston is a rubber part. [0003] A safety device for a syringe as described above is also known from eg EP1436026. The safety device comprises a syringe support which is tubular and coaxial with the syringe body and a protective sleeve which is also tubular, the protective sleeve and the syringe support being axially movable relative to each other. The syringe support is received in the protective sleeve and is generally coaxial with the protective sleeve. The safety device also incl...

Claims

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Application Information

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IPC IPC(8): A61M5/32A61M5/315
CPCA61M5/31511A61M2005/3261A61M5/326A61M5/32
Inventor 马克·迪格比·托伊科P·杜冈洛伊克·赛布罗丹尼尔·彼得马克西姆·盖洛特于尔格·李尼阁
Owner F HOFFMANN LA ROCHE & CO AG
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