Patent ID: 8157784

Claim:
A medical substance transfer system, comprising: (a) a transfer device including: (1) a transfer housing defining an interior chamber; (2) a first septum movably disposed in a distal end of the chamber in a sealing relationship with the chamber, the first septum having a distal surface substantially flush with a distal edge of the transfer housing; (3) a cannula extending through the chamber, and wherein, when the transfer device is uncoupled from the receiver device, a distal tip of the cannula is positioned proximal of the distal edge of the transfer housing; (4) a biasing member inside the chamber, the biasing member adapted to bias the first septum toward the distal end of the chamber; and (b) a receiver device adapted to removably couple to the transfer device, the receiver device including: (1) a receiver housing defining an interior passageway, wherein the interior passageway is in communication with a distal tip of the cannula when the transfer device and receiver device are coupled to one another; (2) a second septum disposed in a proximal region of the housing, the second septum having a proximal surface substantially flush with a proximal edge of the housing, wherein the proximal surface of the second septum is in juxtaposed contact with the distal surface of the first septum when the transfer device and receiver device are coupled to one another and wherein the second septum provides a barrier to prevent fluid from escaping from the interior passageway of the receiver housing.