| 摘要 |
A no leak syringe has: a syringe body having a front portion and an open rear end portion, a plunger having a front and a rear and which is slideable along the barrel from a retracted position where the front of the plunger is in the rear portion of the barrel to a extended position where the plunger has been slid along the barrel towards the front of the barrel, a pierceable self healing seal extending over the front of the plunger and through which the needle can pierce when the needle is retracted, the seal being substantially closed after the needle has passed through the seal, a needle holder which is positioned in the front of the barrel, a needle attached to the needle holder, a triggering mechanism to enable the needle to be retracted into the syringe body and/or the plunger body, a plunger lock mechanism to lock the plunger against retraction when the needle has been retracted, a thumb pad on the rear of the plunger, and a seal on the thumb pad that seals against the open rear end portion of the syringe body to prevent liquid from leaking from the rear end portion of the barrel when the needle has been retracted.
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