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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0256922 (1981-04-23) |
우선권정보 | FR-0009720 (1980-04-25); FR-0025029 (1980-11-24) |
발명자 / 주소 |
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인용정보 | 피인용 횟수 : 6 인용 특허 : 2 |
A manhole cover assembly comprises a seating ring which can be inset in a street or roadway surface and which is formed with a pair of lateral compartments in which respective latches of the plug-like cover can be received. According to the invention, the cover has a pair of opposing radial projecti
A manhole cover assembly comprising: a seating ring adapted to be received in a roadway pavement around a manhole opening, said ring being provided with at least one upwardly open lateral compartment communicating with the interior of said ring through a window formed in said ring and overhung by a
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