Patent ID: 7367964

Claim:
A syringe comprising: a syringe cylinder having an end; a syringe connection provided on said end of said syringe cylinder, said syringe connection having a free end, said syringe connection including a lock connection having an internal thread, said lock connection including a ring, said ring tapering conically toward said free end; a cap, said cap engaging said free end of said syringe connection, said cap having an external thread, said external thread engaging said internal thread of said lock connection, said ring retaining said cap in a first position such that force is required to move said cap from said first position to a second position; and a membrane closing said free end of said syringe connection, said cap having a spike for piercing said membrane, wherein said syringe cylinder, said syringe connection, and said membrane are formed as one piece of injection molded plastic.