Measuring and testing – Liquid level or depth gauge – Sight glass
Patent
1989-11-22
1991-01-01
Yasich, Daniel M.
Measuring and testing
Liquid level or depth gauge
Sight glass
73328, G01F 2302
Patent
active
049810405
ABSTRACT:
A sight flow indication apparatus with multi-sealing protective arrangements includes: an upper and a lower flange coupling member, each member having a stuffing box formed therein; a first and a second gland member each having a gland pipe portion formed in conjunction with the stuffing boxes; a transparent sight flow tube, the periphery of which has a layer of a thin film of a transparent protective material disposed thereon, tightly secured in the stuffing boxes between the upper and lower flange coupling members through the first and second gland members and a plurality of gasket members; and a plurality of gland packing members respectively disposed in the stuffing boxes in connection with the first and second gland members and the transparent sight flow tube; whereby, when the first and second gland members and the transparent sight flow tube are tightly fastened between the upper and lower flange coupling members, effective means of sealing protection are achieved accordingly.
REFERENCES:
patent: 3046785 (1962-07-01), Au Werter
patent: 3375802 (1968-04-01), Lazarre
patent: 3837226 (1974-09-01), Kawawa
patent: 4877668 (1989-10-01), Hinz et al.
patent: 4888990 (1989-12-01), Bryan et al.
Razzano Pasquale A.
Yasich Daniel M.
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