Measuring and testing – Liquid level or depth gauge – Sight glass
Patent
1978-02-14
1980-01-08
Yasich, Daniel M.
Measuring and testing
Liquid level or depth gauge
Sight glass
73330, 220 82A, 277 343, 277226, G01F 2302
Patent
active
041821793
ABSTRACT:
A sight glass assembly including a housing structure mountable on a vessel for containing fluid, the housing structure having an opening therethrough, the opening having an enlarged section providing a shoulder, a face plate having an opening registered with the opening in the housing structure, mounted on the housing structure so that a portion thereof is disposed in opposed relation to the shoulder, a lens disposed in the enlarged section of the opening in the housing structure and interposed between the shoulder and the portion of the face plate, a packing member disposed in the enlarged section of the opening between the housing structure and the periphery of the lens, the packing member being hollow and filled with a fluid and means for securing the face plate to the housing structure and applying a force on the packing member causing the packing member to exert a uniform compressive force about the periphery of the lens and effect the seal between the housing structure and the periphery of the lens.
REFERENCES:
patent: 794987 (1904-11-01), Kneuper
patent: 983423 (1911-02-01), Brelle
patent: 2700196 (1955-01-01), Panhard
patent: 2893060 (1959-07-01), Wills
patent: 3013433 (1961-12-01), Miller et al.
patent: 3178779 (1965-04-01), Clark et al.
patent: 3380303 (1968-04-01), LeRoy
patent: 3773338 (1973-11-01), Fidler et al.
patent: 3922999 (1975-12-01), Meginnis
patent: 3942881 (1976-03-01), Meginnis
patent: 4037471 (1977-07-01), Okamoto et al.
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