Glassware stopcock with freeze extractor

Details Glassware stopcock with freeze extractor Glassware stopcock with freeze extractor

1981-09-25

1983-07-26

Marcus, Michael S.

Chemical apparatus and process disinfecting, deodorizing, preser

Control element responsive to a sensed operating condition

29237, 81 31R, 215296, B01L 1100

Patent

active

043953824

ABSTRACT:
A glassware stopcock for laboratory equipment includes a glass body having a Teflon stopcock plug with an extractor for extracting the plug from its bore when the plug becomes frozen therein and unable to rotate. The extractor includes a threaded cylindrical portion formed on the stem of the plug with an extractor nut threaded on the threaded section and adapted to engage the valve body for extracting the plug from its bore.

REFERENCES:
patent: 3142474 (1964-07-01), Nelson
patent: 3882884 (1975-05-01), Leopold et al.
Sargent-Welch-1971; pp. 309, 1008, 1010.

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