Locking cover assembly for preventing unauthorized access to a utility shut off valve
US9790714B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Mar 30, 2017 |
| Grant date | Oct 17, 2017 |
| Priority date | — |
| Expiry date | Mar 30, 2037 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K35/10
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A security cover assembly for limiting access to a utility shut off valve through an open topped curb box, including a security screw extending through a hole in a cover member, the cover member configured to cover the open top of the curb box to enabling moving of the clamping plate up and down in the curb box by rotation of the security screw in respective opposite directions. A cutout into the clamping plate perimeter allows the clamping plate to be lowered to a level in the curb box beneath a flange projecting radially inwardly from an outer wall of the curb box. In the lowered position, the clamping plate may be rotated with the cover assembly to position a portion of the clamping plate beneath an underside of the flange. The clamping plate is thereafter elevated to be engaged with the underside of the flange upon rotation of the security screw in a direction raising the clamping plate. Rotation of the cover assembly back in the opposite direction to align the cutout in the clamping plate with the flange can be done once the clamping plate is lowered out of engagement with the underside of the flange by rotation of the security screw in an opposite direction, allowing the cove…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.