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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0732671 (1985-05-10) |
발명자 / 주소 |
|
출원인 / 주소 |
|
인용정보 | 피인용 횟수 : 2 인용 특허 : 1 |
An obstructing plate construction for a tank having an opening in a top wall thereof and a cover with a base plate having an opening aligned with the opening in the top wall, the obstructing plate construction including an adapter plate mounted between the base plate and the top wall, bolts permanen
In a thief hatch construction mounted on the top wall of a tank having a wall opening therein, said thief hatch construction including a base plate, a base plate opening in said base plate overlying said wall opening, a plurality of first holes in said top wall surrounding said wall opening, and a p
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