Tissue freezing process

Details Tissue freezing process Tissue freezing process

1990-01-30

1991-08-27

Caposse, Ronald C.

Refrigeration

Processes

Treating an article

62293, 62320, F25D 1702

Patent

active

050422618

ABSTRACT:
A histological tissue freezing process is provided. The process includes an aerosol can with an adjustable flow rate spray unit for spraying a chemical, monochlorodifluoromethane, onto a portion of a histological tissue specimen before sectioning thereof. The use of monochlorodifluoromethane has the dual advantage reducing ozone depletion and producing a colder spray. The spray means has a horizontal hinged spray bar with a passage with a spray outlet and has a horizontal hinged actuator plate with a trigger for slightly turning the actuator plate unit and spray bar. A tube has a passage connecting to the spray bar passage. The tube has an upper end coupled to the spray bar and an intermediate end extending through a can upper wall and a lower end disposed inside the can. The tube lower end has an adjustable orifice opening. The tube also has a latching unit, a compression spring, and seal ring.

REFERENCES:
patent: 3820352 (1974-06-01), Mahler
patent: 3830239 (1974-08-01), Stumpf et al.
patent: 3901241 (1975-08-01), Allen, Jr.

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