Patent ID: 9435098
Filing Date: 2016-09-06
CPC Classification: E02D

Claim Text:
1. A floating manhole cover system to be installed on a manhole shaft having an inner opening, and an outer diameter, and a road having a road base, said system comprising: a. a precast-ring having an inner diameter sized to align with the inner diameter of the manhole shaft; an outer diameter being at least 25cm larger than the outer diameter of the manhole shaft; a top surface to engage with the road's top finish; a bottom surface to engage with the road base through a cast-in-place-concrete; b. a manhole cover receiving means to receive a manhole cover; c. a leveling means accessible from the top surface and extending out of said bottom surface to engage with but not attached to the manhole shaft to level and adjust the slope of said precast-ring with the road, wherein said leveling means provides a gap between said precast-ring and said manhole shaft; d. a sealing tube placed in said gap, wherein said sealing tube having a top end to attach to said precast-ring, and a bottom end to attach to said manhole-shaft, thereby preventing flow of any gases out of the manhole-shaft and inflow of surface rain water and underground water into the manhole-shaft,