Sight glass for observing lubricant in the lower gearcase of mar

Details Sight glass for observing lubricant in the lower gearcase of mar Sight glass for observing lubricant in the lower gearcase of mar

1988-06-20

1989-02-14

Cuchlinski, Jr., William A.

Measuring and testing

Liquid level or depth gauge

Sight glass

73328, 116276, 220 82A, 441135, G01F 2302

Patent

active

048038768

ABSTRACT:
Apparatus for providing a sight glass in the lower gearcase of a marine engine wherein the gearcase has a circular opening in its side. The circular opening has three concentric segments, the outermost segment has the largest diameter and is internally threaded. The center segment is sized to accomodate a disc-shaped transparent sight glass. The innermost segment has a diameter less than the center segment and the surface between the center and innermost segments contains an annular groove. An O-ring or resilient waterproof material fits into the annular groove and the disc-shaped sight glass is fitted into the center segment of the opening in the grearcase with its outer edge pressed against the O-ring. A ring-shaped window cover is then threadedly fitted into the outermost segment of the opening in the gearcase and firmly pressed against the sight glass and locked in place by a lock nut screwed into a threaded hole in the adjoining edges of the window cover and the gearcase.

REFERENCES:
patent: 2331917 (1943-10-01), Kocher
patent: 2765661 (1956-10-01), Thomas
patent: 3000345 (1961-09-01), Gray, Jr. et al.
patent: 3020795 (1962-02-01), McKinney et al.
patent: 3142287 (1964-07-01), Jones
patent: 3556038 (1971-01-01), Wolfe
patent: 4037471 (1977-07-01), Okamoto et al.
patent: 4590798 (1986-05-01), Yazaki
patent: 4738064 (1988-04-01), Aarts et al.

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