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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0073910 (1979-09-10) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 19 인용 특허 : 5 |
An adjustable support for varying the height of a manhole cover after a street surface has been resurfaced is presented including vertically disposed posts in a downward position on each end of each adjustable section. These posts provide the location for bolts connecting adjacent ends of two adjust
A sectional manhole cover support for vertically adjusting the level of a manhole cover in the opening of a manhole housing to a new road grade, wherein said manhole housing has at its upper edge an arcuate recess opening upwardly and also radially inwardly; each section of said support comprising g
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