NL7404558A - Street manhole support assembly - has steps allowing cover height adjustment with convex and concave supporting faces - Google Patents
Street manhole support assembly - has steps allowing cover height adjustment with convex and concave supporting facesInfo
- Publication number
- NL7404558A NL7404558A NL7404558A NL7404558A NL7404558A NL 7404558 A NL7404558 A NL 7404558A NL 7404558 A NL7404558 A NL 7404558A NL 7404558 A NL7404558 A NL 7404558A NL 7404558 A NL7404558 A NL 7404558A
- Authority
- NL
- Netherlands
- Prior art keywords
- convex
- ring
- cover
- height adjustment
- support assembly
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
- E02D29/14—Covers for manholes or the like; Frames for covers
- E02D29/1409—Covers for manholes or the like; Frames for covers adjustable in height or inclination
Abstract
The manhole has a cover adjustable for height and a cover-supporting ring, and there are stepped portions on ring and base section to determine different cover levels by means of different relative angular positions between the two. The tread portions of the steps diverge from the horizontal plane, there being complementary convex and concave faces on the ring and the base section. The convex faces can be on the base, and the concave ones on the ring. The lower ring can support a separate thin high ring, e.g. of plastic, running round the cover-supporting ring, and extending upwards above the top step. There can be four steps in all, the convex and concave faces extending only in the peripheral direction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL7404558A NL7404558A (en) | 1974-04-03 | 1974-04-03 | Street manhole support assembly - has steps allowing cover height adjustment with convex and concave supporting faces |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL7404558A NL7404558A (en) | 1974-04-03 | 1974-04-03 | Street manhole support assembly - has steps allowing cover height adjustment with convex and concave supporting faces |
Publications (1)
Publication Number | Publication Date |
---|---|
NL7404558A true NL7404558A (en) | 1975-10-07 |
Family
ID=19821104
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL7404558A NL7404558A (en) | 1974-04-03 | 1974-04-03 | Street manhole support assembly - has steps allowing cover height adjustment with convex and concave supporting faces |
Country Status (1)
Country | Link |
---|---|
NL (1) | NL7404558A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4408421A (en) * | 1981-04-30 | 1983-10-11 | Pai Yang Kuang | Manhole structure |
US5360131A (en) * | 1990-06-29 | 1994-11-01 | Philmac Pty. Ltd. | Cover height adjuster |
-
1974
- 1974-04-03 NL NL7404558A patent/NL7404558A/en unknown
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4408421A (en) * | 1981-04-30 | 1983-10-11 | Pai Yang Kuang | Manhole structure |
US5360131A (en) * | 1990-06-29 | 1994-11-01 | Philmac Pty. Ltd. | Cover height adjuster |
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