Drain plug with disengagement sealing means

Details Drain plug with disengagement sealing means Drain plug with disengagement sealing means

1983-04-11

1985-03-12

Brown, David H.

Lubrication

Automobile crank and gear case service

138 89, 251215, F16N 3300, F16K 502

Patent

active

045039348

ABSTRACT:
An oil pan drain plug having a gasket mounted to the tip thereof to limit oil flow. A flexible gasket mounted to the end of the threaded shank of a bolt has an outside diameter sized to prevent oil flow from a hole even though the external threads on the bolt shank are disengaged therefrom. Four embodiments are disclosed wherein the gasket is mounted to a post integrally connected to the bolt shank. Another embodiment includes a thin walled hollow gasket through which a fastener extends securing the gasket to the bolt shank.

REFERENCES:
patent: 1753833 (1930-04-01), Mueller
patent: 3727638 (1973-04-01), Zaremba et al.
patent: 3811650 (1974-05-01), Dehar
patent: 3929250 (1975-12-01), Abbate et al.
patent: 3948481 (1976-04-01), Pollock
patent: 3967697 (1976-07-01), Guenther
patent: 4025048 (1977-05-01), Tibbitts

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