TW200630522A - Reversed levering type manhole cover opening and closing device - Google Patents
Reversed levering type manhole cover opening and closing deviceInfo
- 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
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.
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) |
-
2005
- 2005-02-24 TW TW94105512A patent/TWI283276B/en not_active IP Right Cessation
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 |