Measuring and testing – Liquid level or depth gauge – Sight glass
Patent
1988-01-15
1988-07-19
Yasich, Daniel M.
Measuring and testing
Liquid level or depth gauge
Sight glass
73328, 116276, 220 82A, 441135, G01F 2302
Patent
active
047577100
ABSTRACT:
A sight glass assembly for observing the lubricant in the lower gearcase of a marine engine. The assembly is designed to be bonded into a circular hole in the lower gearcase housing and includes a window retaining ring which is bonded to the gearcase housing and a lock ring located inside the gearcase, an annular O-ring of resilient water proof material fitted into an annular groove in the retaining ring, a cylindrical disc-shaped transparent sight glass one of whose two outer edges is pressed against the O-ring, and a window cover having a central void and an annular face which is pressed against the second outer edge of the sight glass. The window cover is threadedly joined to the window retaining ring and is preferably locked into place by a lock screw threaded into a hole in the adjoining edges of the window retaining ring and the window cover.
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patent: 4590798 (1986-05-01), Yazaki
Johnson Merrill N.
Yasich Daniel M.
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