Patent ID: 6725673
Filing Date: 2004-04-27
Classification: B25B,F25D,G01N

Abstract:
In an apparatus for quick freezing a tissue specimen, wherein a first platform member rotates about an axis relative to a second platform member and having a cryogenic system in operable fluidic connection with the first and second platform members, the improvement comprising:a) each of said platform members having a first and a second cylindrically shaped cryodisc thereon respectively for chilling by a cryogenic fluid; said first cryodisc being in a covering relationship to said second cryodisc when said first platform is rotated over said second platform; b) said cryodiscs each including a channel system having an inlet and an outlet in fluidic connection with said cryogenic system for circulation of a cryogenic fluid and exhaust of a gas; c) said channel system including an internal chamber, a peripheral channel and a plurality of radial channels communicating therebetween; and d) at least some of said radial channels including a plurality of fins for causing turbulent flow of said cryogenic fluid and increasing heat transfer from said cryodisc to said cryogenic fluid.