Needle and syringe system with automatic safety shield that renders a needle safe

A safety syringe system, comprising:

• a barrel having a first end and an opposite second end;
• a plunger extending into said barrel through said second end;
• an elastic return element having a plug that extends into said first end of said barrel and arms that extend along said barrel toward said second end of said barrel;
• a needle;
• a sliding safety shield that slides between a first position and a second position, wherein said sliding safety shield stretches said arms of said elastic return element toward said second end of said barrel when said sliding safety shield is moved from said first position to said second position, and wherein said sliding safety shield protects said needle in said first position.

A safety syringe system, comprising:

• a barrel having a first end and an opposite second end;
• a plunger extending into said barrel through said second end;
• a needle;
• elastic arms that extend outside of said barrel from said first end of said barrel toward said second end of said barrel;
• a sliding safety shield positionable between a first position that covers said needle and a second position that exposes said needle, wherein said sliding safety shield stretch and elongate said elastic arms when said sliding safety shield is moved from said first position to said second position, wherein said elastic arms bias said sliding safety shield toward said first position.