JPH0297435U - - Google Patents

Info

Publication number
JPH0297435U
JPH0297435U JP367989U JP367989U JPH0297435U JP H0297435 U JPH0297435 U JP H0297435U JP 367989 U JP367989 U JP 367989U JP 367989 U JP367989 U JP 367989U JP H0297435 U JPH0297435 U JP H0297435U
Authority
JP
Japan
Prior art keywords
less
wall thickness
manhole cover
twice
back side
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
Application number
JP367989U
Other languages
English (en)
Other versions
JP2527887Y2 (ja
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 filed Critical
Priority to JP1989003679U priority Critical patent/JP2527887Y2/ja
Publication of JPH0297435U publication Critical patent/JPH0297435U/ja
Application granted granted Critical
Publication of JP2527887Y2 publication Critical patent/JP2527887Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Description

【図面の簡単な説明】
第１図は本考案の一実施例の底面図、第２図は
第１図の−線における断面図、第３図は従来
のマンホール蓋の底面図、第４図は第３図の−
線における断面図、第５図は従来のマンホール
蓋の底面図、第６図は第５図の−線における
断面図である。 １０……マンホール蓋、１２……補強リブ。

Claims (1)

    【実用新案登録請求の範囲】
  1. 裏面に断面が肉厚の５割以下の高さと肉厚の３
    倍以下の長さの上梯を有する台形である環状補強
    リブをほぼ等間隔で同心円状に複数設けたことを
    特徴とするマンホール蓋。
JP1989003679U 1989-01-17 1989-01-17 マンホール蓋 Expired - Lifetime JP2527887Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1989003679U JP2527887Y2 (ja) 1989-01-17 1989-01-17 マンホール蓋

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1989003679U JP2527887Y2 (ja) 1989-01-17 1989-01-17 マンホール蓋

Publications (2)

Publication Number Publication Date
JPH0297435U true JPH0297435U (ja) 1990-08-02
JP2527887Y2 JP2527887Y2 (ja) 1997-03-05

Family

ID=31205528

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1989003679U Expired - Lifetime JP2527887Y2 (ja) 1989-01-17 1989-01-17 マンホール蓋

Country Status (1)

Country Link
JP (1) JP2527887Y2 (ja)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5063762U (ja) * 1973-10-08 1975-06-10
JPS60115954U (ja) * 1984-01-11 1985-08-06 西武機材株式会社 マンホ−ルなどの蓋体

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5063762U (ja) * 1973-10-08 1975-06-10
JPS60115954U (ja) * 1984-01-11 1985-08-06 西武機材株式会社 マンホ−ルなどの蓋体

Also Published As

Publication number Publication date
JP2527887Y2 (ja) 1997-03-05

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Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term