초록 ▼

The invention relates to the freezing of biological products contained in straws and more particularly to the initiation of the crystallization phase. A series of straws is disposed in such manner that the straws are arranged in parallel side-by-side relation and a crystallization bar (10) is mounte

The invention relates to the freezing of biological products contained in straws and more particularly to the initiation of the crystallization phase. A series of straws is disposed in such manner that the straws are arranged in parallel side-by-side relation and a crystallization bar (10) is mounted by springs (20) on two arms (11 and 12) connected to a rotary shaft (13). The arms shift the bar between a waiting position in a receiver-cradle (16) which is deeply cooled by a pipe (17-18) and an operative position in which is bears against the straws. Application in the freezing of blood cells, human and animal sperm, fragments of biological tissues and embryos, etc.

대표청구항 ▼

A device for freezing biological products contained in straws, said device comprising a thermally insulated container having an entrance door, a support carriage located within said container for supporting the biological straws, said carriage being adapted to receive said straws in such manner that

A device for freezing biological products contained in straws, said device comprising a thermally insulated container having an entrance door, a support carriage located within said container for supporting the biological straws, said carriage being adapted to receive said straws in such manner that said straws are parallel to one another, controlled cooling means located within said container comprising a liquid nitrogen injector and means for stirring a gaseous atmosphere within said container, said device further comprising a crystallization inducing means, located within said chamber, comprising an elongated member movable between a first and a second position, a receiver-cradle for receiving and deeply cooling said crystallization inducing means in said first position, and means associated with said crystallization inducing means for shifting said crystallization inducing means between said first position in said receiver-cradle and said second position wherein said crystallization inducing means bears against said straws and is oriented transversely in relation to the straws.