Patent ID: 7648491

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 flush with a distal edge of the transfer housing when the transfer device and receiver device are uncoupled from one another; (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 receiver housing, the second septum having a proximal surface flush with a proximal edge of the entire receiver device when the transfer device and receiver device are uncoupled from one another, 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; wherein at least a portion of the receiver housing inserts inside the transfer housing when the receiver housing and the transfer housing are coupled to one another, and wherein at least a portion of the first septum moves in a proximal direction through the interior chamber of transfer housing during coupling of the receiver device to the transfer device, and wherein the first septum maintains a sealed relationship with an interior wall of the chamber during such movement.