hypodermic needle with safety A disposable safety syringe with a hypodermic needle, comprising a syringe barrel, a piston guided for sliding movement in the barrel, the injection needle being guided to move to a distant position in the barrel, and characterized in that It also includes:an engaging pin integrally formed with the end of the piston,a support block for the injection needle to be mounted in the cylinder body axially movable, and a support block in the support block as the engagement seat for said engagement pin;a resiliently deformable seal mounted on the end of the piston to apply a resilient pressure away from the needle axis and to displace the needle when the needle has been retracted into said barrel. Cause the needle to leave the collimated position.hypodermic needle with safety