Security key tool for manhole access opening security device
US7798742B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 2007 |
| Grant date | Sep 21, 2010 |
| Priority date | — |
| Expiry date | Feb 20, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/558
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A security key tool for unlocking and locking a manhole security device that secures a manhole access opening. The security key tool includes a longitudinal body portion and a handle portion. A security key at a first end of the longitudinal portion is adapted to engage a security lock on the security device for actuating a locking mechanism on the security device to an unlocked position. A slidable member may be used to help engage the security key to the security lock or to protect the security key. A latch release tool at a second end of the longitudinal portion is adapted to release a latch on the manhole security device for actuating the locking mechanism to a locked position. Optionally, the latch release tool may be disposed on a tool head that also includes a lifting tool adapted to engage and lift the security device away from a manhole frame after the security device is unlocked.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.