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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0803178 (1977-06-03) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 10 인용 특허 : 1 |
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 th
In combination: an engine oil pan having a tubular fitting oriented to define a vertical escape passage for gravity discharge of dirty oil from the pan to a subjacent collection vessel; the inner surface of the tubular fitting being internally threaded along its length; an externally threaded plug a
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