FR2252013A5 - Manhole cover with anti-skid surface - has truncated pyramidal projections in rows at 45 degrees to the cover edge - Google Patents

Manhole cover with anti-skid surface - has truncated pyramidal projections in rows at 45 degrees to the cover edge

Info

Publication number
FR2252013A5
FR2252013A5 FR7338648A FR7338648A FR2252013A5 FR 2252013 A5 FR2252013 A5 FR 2252013A5 FR 7338648 A FR7338648 A FR 7338648A FR 7338648 A FR7338648 A FR 7338648A FR 2252013 A5 FR2252013 A5 FR 2252013A5
Authority
FR
France
Prior art keywords
cover
projections
rows
degrees
skid surface
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.)
Expired
Application number
FR7338648A
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Norinco SA
Original Assignee
Norinco SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Norinco SA filed Critical Norinco SA
Priority to FR7338648A priority Critical patent/FR2252013A5/en
Application granted granted Critical
Publication of FR2252013A5 publication Critical patent/FR2252013A5/en
Expired legal-status Critical Current

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

Abstract

The manhole cover with an anti-skid surface, typically of cast iron and for use in carriageway surfaces, incorporates regularly spaced and distributed projections on the exposed surface, these projections taking the form of truncated pyramids. The height (H) of each projection is half the base width (AB). The angle (ALPHA) between the base and inclined faces is 60 deg. and rows of projections are arranged parallel to cover diagonals, i.e. at 45 deg. to the sides of square covers. The height (H) is typically 5 mm and the space (BC) between adjacent projections in the same row is 2 mm or half the top width (DE).
FR7338648A 1973-10-30 1973-10-30 Manhole cover with anti-skid surface - has truncated pyramidal projections in rows at 45 degrees to the cover edge Expired FR2252013A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7338648A FR2252013A5 (en) 1973-10-30 1973-10-30 Manhole cover with anti-skid surface - has truncated pyramidal projections in rows at 45 degrees to the cover edge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7338648A FR2252013A5 (en) 1973-10-30 1973-10-30 Manhole cover with anti-skid surface - has truncated pyramidal projections in rows at 45 degrees to the cover edge

Publications (1)

Publication Number Publication Date
FR2252013A5 true FR2252013A5 (en) 1975-06-13

Family

ID=9127128

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7338648A Expired FR2252013A5 (en) 1973-10-30 1973-10-30 Manhole cover with anti-skid surface - has truncated pyramidal projections in rows at 45 degrees to the cover edge

Country Status (1)

Country Link
FR (1) FR2252013A5 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0822296A1 (en) * 1996-07-29 1998-02-04 Hinode, Ltd. Cover for underground structures
US5997212A (en) * 1996-09-30 1999-12-07 Hinode, Ltd. Cover for underground structures, body thereof and frame therefor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0822296A1 (en) * 1996-07-29 1998-02-04 Hinode, Ltd. Cover for underground structures
US6000878A (en) * 1996-07-29 1999-12-14 Hinode, Ltd. Cover for underground structures
US5997212A (en) * 1996-09-30 1999-12-07 Hinode, Ltd. Cover for underground structures, body thereof and frame therefor

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