E - Fixed Constructions – 02 – D
Patent
E - Fixed Constructions
02
D
E02D 29/14 (2006.01)
Patent
CA 2515818
A plug for temporarily sealing the riser portion of a manhole has an inflatable section contained by two sets of 2 parallel concentric discs separated by a cylindrical spacer. An inflatable section expands within a space defined by the discs and cylindrical shape, completely filling all voids and then expands beyond the boundaries of the plug to fill the gap between the plug and the manhole riser in which the plug has been placed. Inflation valves are protected from external damage while the plug is in use, by being hidden within the cylindrical shape beneath a retractable cover. The inflatable section is protected from the walls of the manhole riser by a separate layer of non-inflating material and the top of the plug is protected from damage by a second protective layer, through which water and gases may pass to eliminate any pressure differential from one side of the plug to the other.
Robertson Dale
Saab Kevin
Zafiris John
Na
Robertson Dale
Saab Kevin
Zafiris John
LandOfFree
Manhole plug does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Manhole plug, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Manhole plug will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1743132