Liquid-level indicating window

Details Liquid-level indicating window Liquid-level indicating window

1980-09-29

1982-12-14

Yasich, Daniel M.

Measuring and testing

Liquid level or depth gauge

Sight glass

116227, 220 82R, 220307, 220DIG19, G01F 2302

Patent

active

043632408

ABSTRACT:
The present invention is directed to liquid-level indicating windows, especially suitable for reservoirs for master cylinder, which are characterized in that a container for housing a liquid is provided with a hole bored therein to which the liquid-level indicating window is made fit. The body of the liquid level device projects outside the container and the liquid-level indicating window has on its inside wall, at the liquid-level indicating section, a sign portion which is different from the other portions of the liquid-level indicating section in the light-path length and which is made of a material almost the same in refractive index as the liquid to be contained in the container.

REFERENCES:
patent: 331023 (1885-11-01), Barrett
patent: 1883971 (1932-10-01), Kryzanowsky
patent: 2943530 (1960-07-01), Nagel
patent: 3096648 (1963-07-01), Dombeck et al.
patent: 3217923 (1965-11-01), Price
patent: 3273267 (1966-09-01), Willman
patent: 3345870 (1967-10-01), Yoshinaga
patent: 3385110 (1968-05-01), Atwood et al.
patent: 3417614 (1968-12-01), Ryder
patent: 3447375 (1969-06-01), Fox, Jr.
patent: 3518962 (1970-07-01), De Leu et al.
patent: 3568628 (1971-03-01), Erickson
patent: 4133287 (1979-01-01), Downs

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