JP2000087378A5 - - Google Patents
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- Publication number
- JP2000087378A5 JP2000087378A5 JP1998255185A JP25518598A JP2000087378A5 JP 2000087378 A5 JP2000087378 A5 JP 2000087378A5 JP 1998255185 A JP1998255185 A JP 1998255185A JP 25518598 A JP25518598 A JP 25518598A JP 2000087378 A5 JP2000087378 A5 JP 2000087378A5
- Authority
- JP
- Japan
- Prior art keywords
- stepped
- manhole cover
- hole
- peripheral surface
- conical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000002093 peripheral Effects 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 230000000149 penetrating Effects 0.000 description 1
Description
マンホール蓋４は鋳鉄製で、前記円錐内周面２と嵌合する円錐外周面５を備えている。マンホール蓋４の外周に近接した位置の二箇所（図には一箇所のみを示す）に、上下方向に貫通する段付貫通孔６が設けられている。段付貫通孔６は上端部が大径の円孔６ｂで、その径が変わる部分に上向きの段面６ａが形成されている。マンホール蓋４の下面の段付貫通孔６の周囲の部分は、下方に若干突出している。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25518598A JP3995809B2 (ja) | 1998-09-09 | 1998-09-09 | マンホール蓋のロック装置 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25518598A JP3995809B2 (ja) | 1998-09-09 | 1998-09-09 | マンホール蓋のロック装置 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2000087378A JP2000087378A (ja) | 2000-03-28 |
| JP2000087378A5 true JP2000087378A5 (ja) | 2005-09-15 |
| JP3995809B2 JP3995809B2 (ja) | 2007-10-24 |
Family
ID=17275225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25518598A Expired - Fee Related JP3995809B2 (ja) | 1998-09-09 | 1998-09-09 | マンホール蓋のロック装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3995809B2 (ja) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8376287B2 (en) * | 2009-12-22 | 2013-02-19 | Siemens Industry, Inc. | Laying head pipe clamp |
-
1998
- 1998-09-09 JP JP25518598A patent/JP3995809B2/ja not_active Expired - Fee Related
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