Self-aspirating syringe

摘要: A hypodermic syringe for medical, dental, or veterinary use employing cartridge ampuls of injectable fluid arranged to be automatically self-aspirating. resilient membrane is deflected at the forward end ampul rearwardly each time plunger actuated, so that upon release resiliently restored its normal position thereby producing conditions reduced pressure aspiration within ampul. The on a stud positioned ampul-receiving cavity in syringe, movable flanged tubular element adjacent and projecting forwardly