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Single use retractable syringe

A syringe, flexible technology, used in the field of syringes

Inactive Publication Date: 2007-03-21
昆斯达知识产权有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the syringe of the applicant's above-mentioned earlier application fulfills both objects, it suffers from the disadvantage that, in both the initial and retracted positions, the inner barrel remains within the outer barrel, as a result, the outer barrel and thus the syringe as a whole longer than the syringe a medical professional finds convenient

Method used

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  • Single use retractable syringe
  • Single use retractable syringe
  • Single use retractable syringe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] Referring to Figures 1-7, syringe 10 includes an outer barrel 11 which is a completely imperforate cylindrical barrel except for openings at each end. An inner cylinder 12 is fitted in the outer cylinder 11 so as to be slid longitudinally forward and backward within the outer cylinder 11 in engagement with the outer cylinder. The inner barrel 12 has a neck 13 at one end and is open at an opposite end 14 . The neck 13 is adapted to engage a needle housing 15 which includes a needle 16 . As shown, the needle 16 is in fluid communication with a chamber 17 within the inner barrel 12 . Once fitted to the neck 13 , the needle 16 protrudes from the first end 18 of the outer barrel 11 .

[0024] A spring 20 is located within the first end 18 of the outer barrel and acts on the inner barrel 12 to bias the inner barrel 12 towards the second end 19 of the outer barrel 11 .

[0025] A piston 21 is located in the inner cylinder 12 and mounted on one end of the plunger 22 . The p...

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Abstract

A single use retractable syringe (10) has an inner barrel (44) supporting a needle (16) at one end and is slidable within an outer barrel (11). In the packaged condition the inner barrel is in a position relative to the outer barrel such that the needle can be attached to a Luer connection on the inner barrel and projects from a first end (18) of the outer barrel. The inner barrel has first and second latching means (40, 41, 43) adjacent each end, respectively, and the outer barrel has retaining means (48) on the inner wall surface adjacent the second end thereof. When the inner barrel first latching means (40) is engaged with the retaining means the syringe is in position ready for use and after the first full depression of a plunger the inner barrel is released and moves to a position where the second latching means (41, 43) becomes permanently engaged with the retaining means. The needle is then fully enclosed within the outer barrel and the inner barrel projects from the second end (19) of the outer barrel.

Description

technical field [0001] The present invention relates to a single-use retractable syringe substantially as described in the applicant's earlier International Patent Application PCT / AU02 / 00297, entitled "Improved non-reusable syringe", incorporated herein by reference Its contents are for reference only. In particular, the present invention relates to an improvement over earlier devices whereby the length of the syringe in the initial or non-retracted state is greatly reduced. Background technique [0002] Syringes of the retractable and / or single-use type are well documented, and in the case of retractable syringes, are used to greatly reduce the risk of needlestick injury to medical personnel, whereas in the case of single-use In the type of situation, the possibility of re-use by the intravenous drug user is eliminated. Although the syringe of the applicant's above-mentioned earlier application fulfills both objects, it suffers from the disadvantage that, in both the init...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/00A61M5/315A61M5/32
CPCA61M5/326G05B19/0428A61M2005/3261Y02B70/3241A61M5/31501G05B2219/24028H02H9/008G05B2219/25174A61M2005/31508A61M2005/3264Y04S20/227Y02B70/30Y04S20/20
Inventor B·W·英格兰姆R·诺思卡特A·贝瑞
Owner 昆斯达知识产权有限公司
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