Manhole cover locks, lockable manhole covers, and methods for locking a manhole cover
US9765498B2 · kind B2 · utility
2Cited by
11References
37Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2016 |
| Grant date | Sep 19, 2017 |
| Priority date | — |
| Expiry date | Sep 14, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05B63/18
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A locking assembly attachable to a manhole cover includes an arm disposable in a lowered position with the arm disposed in a first orientation engageable with a manhole frame supporting the manhole cover to inhibit removal of the manhole cover from a manhole frame, and disposable in a raised position and in a second orientation operable to allow removal of the manhole cover from the manhole frame. In an embodiment, the locking assembly may include the arm attached to a movable member having a spiral, helix, or curved groove and in which the movable arm is receivable in a bushing and a pin receivable in the groove.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.