TW200630522A - Reversed levering type manhole cover opening and closing device - Google Patents

Reversed levering type manhole cover opening and closing device

Info

Publication number
TW200630522A
TW200630522A TW094105512A TW94105512A TW200630522A TW 200630522 A TW200630522 A TW 200630522A TW 094105512 A TW094105512 A TW 094105512A TW 94105512 A TW94105512 A TW 94105512A TW 200630522 A TW200630522 A TW 200630522A
Authority
TW
Taiwan
Prior art keywords
manhole cover
reversed
levering
cover opening
type
Prior art date
Application number
TW094105512A
Other languages
Chinese (zh)
Other versions
TWI283276B (en
Inventor
Chang-Han Chen
Wei-Li Li
zhi-qiang Bai
Rong-Xiu Guo
Lian-Zhen Huang
shi-wei Lai
yi-quan Lin
Original Assignee
Chunghwa Telecom Co Ltd
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 Chunghwa Telecom Co Ltd filed Critical Chunghwa Telecom Co Ltd
Priority to TW94105512A priority Critical patent/TWI283276B/en
Publication of TW200630522A publication Critical patent/TW200630522A/en
Application granted granted Critical
Publication of TWI283276B publication Critical patent/TWI283276B/en

Links

Landscapes

  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)

Abstract

A reversed levering type manhole cover opening and closing device, by adopting the principle of using reversed forces generated by two levers to pry open the manhole cover at the time of craning the manhole cover, so as to force separation of the manhole cover from the manhole frame, thereby allowing vertical opening of the manhole cover. The reversed levering type manhole cover opening and closing device includes: two reversed levering type manhole cover opening and closing units, two adjustable supports; two bolt hooks and a cable, wherein the reversed levering type manhole cover opening and closing units serve to pry open and crane up the manhole cover, the two bolt hooks serve to retain the reversed levering type manhole cover opening and closing unit and the manhole cover, the two adjustable supports enables sliding movement of the fulcrums of the reversed levering type manhole cover opening and closing unit, and cable serves to transmit the pulling force of a crane truck while pulling the tail ends of the two reversed levering type manhole cover opening and closing units, such that the manhole cover can be immediately craned upwards upon the front ends of the units prying open the manhole cover.
TW94105512A 2005-02-24 2005-02-24 Reversed levering type manhole cover opening and closing device TWI283276B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW94105512A TWI283276B (en) 2005-02-24 2005-02-24 Reversed levering type manhole cover opening and closing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW94105512A TWI283276B (en) 2005-02-24 2005-02-24 Reversed levering type manhole cover opening and closing device

Publications (2)

Publication Number Publication Date
TW200630522A true TW200630522A (en) 2006-09-01
TWI283276B TWI283276B (en) 2007-07-01

Family

ID=39428129

Family Applications (1)

Application Number Title Priority Date Filing Date
TW94105512A TWI283276B (en) 2005-02-24 2005-02-24 Reversed levering type manhole cover opening and closing device

Country Status (1)

Country Link
TW (1) TWI283276B (en)

Also Published As

Publication number Publication date
TWI283276B (en) 2007-07-01

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Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees