Low friction vacuum valve and drying apparatus

Details Low friction vacuum valve and drying apparatus Low friction vacuum valve and drying apparatus

1985-04-29

1986-04-29

Camby, John J.

Drying and gas or vapor contact with solids

Apparatus

Vacuum

13762523, 13762524, 13762547, F26B 1330, F26B 2106, E03B 300

Patent

active

045847819

ABSTRACT:
A vacuum valve maintaining the simplicity of operation and reliability of a glass stopcock for large bore, low impedance vacuum procedures, such as continuous freeze drying. A rigid inner member, with friction reducing raised circumferential and longitudinal portions, is rotated within a clear elastomeric outer member to provide various vacuum connections.

REFERENCES:
patent: 2547929 (1951-04-01), Dawson
patent: 2854027 (1958-09-01), Kaiser et al.
patent: 3516170 (1970-06-01), Liobis et al.
patent: 4308892 (1982-01-01), Ausdal

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