A safety syringe with a minimized thin-disk plunger for saving cost includes: a hollow needle normally held in a front portion of a syringe, a coupling member of arrowhead shape integrally formed with the thin-disk plunger, an annular ring embedded on the plunger to allow the plunger to be slidably held...http://www.google.fr/patents/US5405327?utm_source=gb-gplus-shareBrevet US5405327 - Simplified safety syringe with retractable self-biased needle and minimized plunger
Simplified safety syringe with retractable self-biased needle and minimized ...
