US Patent 9212772 Needle free connector

A needle free connector includes a tube device having a first tube, a first locking elements formed on a distal end of the first tube and having a transverse channel in communication with the first tube and a push rod integrally formed on a side face of the first locking elements, a resilient frame securely engaged with the first locking elements and having a second ring movably positioned due to movement of the first tube and provided with a hole defined in a bottom face of the second ring to allow the first tube to movably extend therethrough, a hollow casing provided with a second tube to movably receive therein the first tube and a cap securely connected to the hollow casing to form a watertight connection.