Metering drain plug

Details Metering drain plug Metering drain plug

1977-06-03

1979-03-27

Smith, Robert I.

Valves and valve actuation

With material guide or restrictor

Movable or resilient guide or restrictor

220304, 251144, 251216, F16K 4700, F16K 2404

Patent

active

041462076

ABSTRACT:
An engine oil pan having a threaded drain opening sealed by a removable plug. An auxiliary passage is formed in the plug, whereby the plug can be partially unscrewed from the drain opening to discharge metered quantities of water, sludge and similar impurities that accumulate from time to time at the bottom of the pan. The metered flow can be easily stopped when it turns into clean oil.

REFERENCES:
patent: 1690183 (1928-11-01), Stoughton
patent: 1993534 (1935-03-01), Stoltz
patent: 2082827 (1937-06-01), Gaber
patent: 2471716 (1949-05-01), Bell
patent: 3384338 (1968-05-01), Dermody
patent: 3578285 (1969-06-01), Carlton
patent: 3910572 (1975-10-01), Denler
patent: 3958604 (1976-05-01), Stoltman

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