Patent ID: 8100885

Claim:
A cap assembly comprising: a housing defining a receptacle and having an inlet end and an outlet end, the inlet end defining an opening and being adapted to releasably and rotatably engage a syringe, and the outlet end defining an outlet conduit and being adapted to releasably engage an indwelling catheter assembly; a plunger movable axially within the receptacle from a retracted position to an advanced position and being rotatably supported within the receptacle from a first position to a second position, the plunger assembly including an axial extension configured to non-rotatably engage a syringe connected to the inlet end of the housing; wherein the plunger assembly includes at least one protrusion and the housing includes at least one slot dimensioned to slidably receive the at least one protrusion, the at least one protrusion being misaligned with the at least one slot when the plunger is in the first position to retain the plunger in the retracted position and the at least one protrusion being aligned with the at least one slot when the plunger is in the second position to facilitate movement of the plunger from the retracted position to the advanced position.