Apparatus for freezing fertilized ova, spermatozoa or the like

A - Human Necessities – 61 – F

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A61F 7/10 (2006.01) A01N 1/02 (2006.01) B01L 7/00 (2006.01) F17C 13/02 (2006.01) F25D 3/10 (2006.01) G05D 23/20 (2006.01)

Patent

CA 1217350

ABSTRACT OF THE DISCLOSURE There is disclosed an apparatus for freezing fertilized ova, spermatozoa or the like which is comparatively simple in use, in which the temperature can be readily controlled, and which effectively prevents sterilizing the fertilized ova, spermatozoa or the like as a result of an abrupt increase in temperature. The apparatus includes a heat transfer bottom board block formed at the lower end of a heat insulating peripheral wall with a lower refrigerant passage for the flow of refrigerant, a bottom board tempera- ture sensor attached to the bottom board block for detecting the temperature of the bottom board block, and an upper heat transfer block placed on the bottom board block through a heat insulating joint member, formed with an upper refrigerant passage for flow of the refrigerant. There is also a tempera- ture control heater, an upper block temperature sensor, and a plurality of erecting tube charging spaces for tubes open at the top thereof, with the bottom board block as a bottom member between said peripheral wall and the upper block so that the tubes respectively erected and charged into the spaces are cooled at the lower ends thereof by the bottom board block and at the upper part contain articles to be frozen such as fertilized ova, spermatozoa or the like contained in buffer solution in said tubes.

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