| 20100180505 | PIT COVER - A cover for closing the service opening of a pit casing, the cover including an opening with a hatch and a first member coupled to the cover that is accessible though the opening in the cover when the hatch is not in a closed position, wherein when the cover is in a closed position to close the service opening the first member is in cooperative proximity with a second member coupled to the pit casing that at most protrudes only a portion of the span of the service opening, and when the cover is in the closed position and the hatch on the cover is opened from its closed position the first and second members, may be coupled together to resist the cover from being moved to open the service opening. | 07-22-2010 |
