Medical connector having locking engagement

A method of transferring a fluid from a first medical device for receiving or dispensing fluids to a second medical device for receiving or dispensing fluids, the method comprising:

• providing a first connector having a proximal end and a distal end, wherein the proximal end is connected to the first medical device and the distal end is open, the first connector comprising a housing and a cam member, wherein the cam member comprises at least one projection extending from an inner surface of the cam member;
• providing a needle cannula within the housing of the first connector to transfer the fluid from the first medical device to the second medical device;
• providing a second connector having a proximal end and a distal end, wherein the distal end is connected to the second medical device, the second connector comprising a groove defined in an outer surface of the second connector;
• inserting the proximal end of the second connector at least partially into the open distal end of the first connector;
• applying and releasing a first set of opposing axial forces to the proximal end of the first connector and the distal end of the second connector, wherein the at least one projection of the first connector is directed into and locked in the groove of the second connector;
• transferring the fluid from the first medical device to the second medical device through the first connector and the second connector;
• and
• applying and releasing a second set of opposing axial forces to the proximal end of the first connector and the distal end of the second connector, wherein the at least one projection of the first connector is released from and directed out of the groove of the second connector.