초록 ▼

Quick cryogenic freezing of blood plasma is accomplished by providing a conductive cylinder mounted in a nitrogen container, the cylinder loosely fitting a standard plasma bottle to provide for heat transfer from the bottle by conduction and space for passage of vapor, the cylinder walls having long

Quick cryogenic freezing of blood plasma is accomplished by providing a conductive cylinder mounted in a nitrogen container, the cylinder loosely fitting a standard plasma bottle to provide for heat transfer from the bottle by conduction and space for passage of vapor, the cylinder walls having longitudinally extending ducts connected at their upper ends to the head space above the liquid nitrogen and discharging through injection ports spaced along the ducts and directed inwardly against the bottle, the vapor being drawn along the sides of the bottle and discharged outwardly of the apparatus.

대표청구항 ▼

For use with a cryogenic container having upstanding walls, a bottom, an open top, and a removeable lid, the improvement comprising, plate means extending transversely of said walls and between said bottom and open top, said plate means in sealed relationship with said walls, thermally conductive co

For use with a cryogenic container having upstanding walls, a bottom, an open top, and a removeable lid, the improvement comprising, plate means extending transversely of said walls and between said bottom and open top, said plate means in sealed relationship with said walls, thermally conductive cooling tower means having side walls, a closed bottom and an open top, said plate means receiving the upper portion of said cooling tower means and in sealed relationship with the side walls thereof, said cooling tower means having duct means extending along its side walls from adjacent its upper portion to a position therebelow, said duct means having inlet means at its upper portion for receiving vapor from beneath said plate means, said duct means having port means for discharging vapor inwardly, said container having means for discharging vapor which is in the space above said plate means, whereby liquid cryogen in said container at a level just below said plate means is in thermally conductive relation with a cryobiological container in said cooling tower means, and whereby evolving cryogen vapor passes through said duct means and said port means into contact with said cryobiological container, said vapor passing upwardly along said container in heat exchange relation therewith into the space above said plate means for discharge from said cryogenic container.