Retractable needle device

摘要: The present invention provides, in a preferred embodiment, retractable needle (26) device for use with syringe. syringe may be manually driven or electronically driven. In the retracted position, is enclosed within safety shield and extended from (60) upon actuation of plunger (38) normally used to dispense biocompatible material needle. this instance, initial pressure on serves extract after extracted, dispensed carpule communication When it desired retract needle, direction travel reversed thereby effectively retracting back shield.