Patent ID: 8505396

Claim:
A fluid transfer device comprising: a body; an elongate passage extending through the body and having a proximal end and a distal end; a longitudinally displaceable substantially hollow shaft disposed in and extending along the passage, the shaft having a proximal end and distal end and having a first position displaced toward the distal end of the passage and a second position displaced toward the proximal end of the passage, wherein the shaft is axially biased longitudinally away from the proximal end of the passage; a plug attached to the proximal end of the shaft and sealing the passage at the proximal end thereof when the shaft is in its first position; a diaphragm sealing the passage at a location intermediate the plug and the distal end of the passage; the shaft extending through and being sealingly secured to the diaphragm; a fluid transfer opening in the shaft between the plug and the diaphragm; wherein, longitudinal displacement of the shaft towards its second position moves the plug to open the passage, the diaphragm stretches to accommodate the displacement of and maintain a seal about the shaft, and a substantially aseptic fluid flow path is established through the fluid transfer opening in the shaft and through the shaft's substantially hollow interior.