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Disposible safety syringe with improved retractable needle

一种安全注射器、注射器的技术，应用在注射器领域，能够解决液压损坏、保持在针的后面等问题

Inactive Publication Date: 2003-06-04
萨克哈拉姆·D·马赫卡
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] 3. Activation of the retraction mechanism must be operated from the proximal plunger end
[0012] 4. The worker's hand must remain behind the needle when the needle is covered
[0013] 5. The safety structure must be an integral part of the device
[0030] 19. Hydraulic damage

Method used

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  • Disposible safety syringe with improved retractable needle
  • Disposible safety syringe with improved retractable needle
  • Disposible safety syringe with improved retractable needle

Examples

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Embodiment Construction

[0096]While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by means of the accompanying drawings and will be described in detail herein. It should be understood that the intention is not to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

[0097] Several different embodiments of the invention are described, each with its own unique features and alternative embodiments. However, permutations and combinations of these features will result in other embodiments.

[0098] Turning now to the attached drawings, figure 1 and 2 show a needle-syringe assembly comprising a tube 10 , a plunger 11 , a hollow elastic (rubber) plunger cover 12 , a hypodermic needle 13 and a needle holder 14 . Tube 10 is a hollow cylinder terminating in...

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PUM

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Abstract

A safety syringe assembly includes an elongated, generally cylindrical barrel having a hollow interior forming a hollow nozzle located at a distal end of the barrel and opening into the interior of the barrel. A plunger is slidably mounted in the barrel and has a longitudinal open channel. A needle holder mounts a needle at a distal end thereof and is slidably mounted in the longitudinal open channel of the plunger for movement between an advanced position in which the needle on the distal end of the needle holder projects from a distal end of the nozzle, and a retracted position in which the needle is retracted within the barrel. A compression spring is mounted inside of the barrel, and a spring retainer element has a spring support portion extending from the interiorly of the barrel to a portion for mounted within the barrel and supporting a distal end portion of the spring against expansion. The spring urges the needle holder toward its retracted position. A latch has a closed position in which the needle holder is latched relative to the barrel to hold the needle holder in its advanced position against the urging of the spring, and an open position in which the needle holder is unlatched relative to the barrel to allow the spring to expand in a proximal direction to move the needle holder to its retracted position.

Description

technical field [0001] The present invention generally relates to syringes for hypodermic needles. In particular, the present invention relates to a needle-syringe assembly which retracts the sharp point of a hypodermic needle after use, thereby rendering it unusable. An over-the-needle (OTN) catheter may also be used with the injector device of the present invention. Background technique [0002] Hypodermic needles have many uses in modern medicine. One use is to mount a hypodermic needle to a syringe, which is then inserted into the body for intramuscular, subcutaneous or intravenous injection of a drug. Another use for hypodermic needles is to mount a catheter coaxially on the hypodermic needle and to puncture a human vein with the needle. Following needle penetration, an over-the-needle (OTN) catheter is advanced and held in the vein, the needle is removed, and the catheter is connected to an intravenous line for fluid injection into the vein. [0003] Hypodermic nee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/31A61M5/178A61M5/315A61M5/32A61M25/06
CPCA61M25/0631A61M5/31511A61M25/0606A61M5/3232A61M2005/3206A61M5/178
Inventor 萨克哈拉姆D.马赫卡
Owner 萨克哈拉姆·D·马赫卡
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