Top view liquid sight level indicator

Details Top view liquid sight level indicator Top view liquid sight level indicator

2006-07-27

2009-10-06

Williams, Hezron (Department: 2856)

Measuring and testing

Liquid level or depth gauge

Sight glass

C073S326000, C073S330000, C073S331000

Reexamination Certificate

active

07597000

ABSTRACT:
A top reading liquid sight level indicator mounts above a liquid contained in a liquid vessel comprises a measuring surface mounted to the liquid vessel that penetrates an upper surface of the contained liquid at a cant from normal to the liquid surface so that the points along the measuring surface that penetrate the liquid surface are visible from above the liquid vessel and represent the level of the liquid in the liquid vessel.

REFERENCES:
patent: 1867204 (1932-07-01), Bohnhardt
patent: 2329412 (1943-09-01), Hollis
patent: 2835412 (1958-05-01), Clurman
patent: 3211321 (1965-10-01), Holmes
patent: 3370469 (1968-02-01), Mackenzie
patent: 3371648 (1968-03-01), Farina, Jr.
patent: 3417730 (1968-12-01), Colley et. al.
patent: 3589191 (1971-06-01), Kelch, Jr.
patent: 5459609 (1995-10-01), Schrag
patent: 5634278 (1997-06-01), London

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