Drying and gas or vapor contact with solids – Apparatus – Vacuum
Patent
1976-07-02
1978-04-18
Camby, John J.
Drying and gas or vapor contact with solids
Apparatus
Vacuum
220235, 220237, F26B 1330
Patent
active
040843300
ABSTRACT:
A flask for freeze drying being formed of chemically and thermally resistant materials, including a container flask and a cover assembly and having conduit means in the cover assembly for communication with the interior of the container flask and connection to a vacuum source. A filter is removably held in place by a sealing ring on the cover assembly over the point of communication of the tube with the container flask to prevent solid particles from being withdrawn by the vacuum and excludes contaminants on release of the vacuum. A resilient annular sealing ring is compressed between two movable portions of the cover assembly to sealingly engage the walls of the flask mouth and thereby provide a positive seal both at room temperature and in the face of the sudden temperature changes under vacuum which are present in freeze drying procedures.
REFERENCES:
patent: 2477044 (1949-07-01), Carmean
patent: 2886067 (1959-05-01), Maxwell et al.
patent: 3293773 (1966-12-01), Frazer et al.
patent: 3447712 (1969-06-01), Galasso et al.
patent: 3474543 (1969-10-01), Bender et al.
patent: 3743132 (1973-07-01), Larker et al.
patent: 3794204 (1974-02-01), Wehmeyer
patent: 4024648 (1977-05-01), Bender
Camby John J.
FTS Systems Inc.
Shekleton Gerald T.
Wagner Robert E.
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