초록 ▼

An apparatus for quick freezing tissue specimens includes a base supporting a linear motion platform and a rotational motion platform. Each of the platforms includes a plurality of discs for covering and receiving respectfully specimen to be frozen. Each of the discs includes a chambers positioned t

An apparatus for quick freezing tissue specimens includes a base supporting a linear motion platform and a rotational motion platform. Each of the platforms includes a plurality of discs for covering and receiving respectfully specimen to be frozen. Each of the discs includes a chambers positioned to very quickly and rapidly disperse cryogenic fluid therein and convey away evaporated gases therefrom. The discs are flow connect to a cryogenic fluid source such as a liquid nitrogen tank and a vacuum is drawn on the gaseous side system by a vacuum pump. The discharge of the vacuum pump is returned to the cryogenic tank such that the vacuum pump both draws the cryogenic fluid through the system and pressurizes the tank so as to motivate the fluid through the system. A rotational column with a cryogenic junction conveys the cryogenic fluid to and from the platform that rotates. The junction is constructed of axially connected and rotatable quartz tubing. A plurality of channels encircle each disc and are connected to a vacuum system. A latch and trigger mechanism allows the rotatable platform to swing about an axis in an angular motion and thereafter stop, thereafter the linear platform moves linearly toward the rotational platform. The linear platform is reset by rotation of the rotational platform.

대표청구항 ▼

An apparatus for quick freezing tissue specimens for medical study comprising: a) a first platform having a first surface for receiving a specimen; b) a second platform having a second surface for operably engaging the specimen; said first and second platforms being rotatable relative to one another

An apparatus for quick freezing tissue specimens for medical study comprising: a) a first platform having a first surface for receiving a specimen; b) a second platform having a second surface for operably engaging the specimen; said first and second platforms being rotatable relative to one another about a substantially horizontal axis between a first open position wherein the first and second platforms are sufficiently spaced to allow positioning of the specimen on said first platform surface such that said first and second platforms are facing substantially upwards and a second covering position wherein the second platform is positioned directly over said first platform and in spaced relationship thereto such that said first and second platforms are facing each other; and c) linear movement mechanism cooperating with said first and second platforms; said linear movement mechanism including a latch device to prevent linear movement until said second platform is in the covering position thereof and a linear biasing device for urging said first and second platform toward one another into a position wherein both of said first and second platforms are in facing relationship and engage the specimen with said respective first and second surfaces from opposite sides of the specimen.