IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0921450
(2015-10-23)
|
등록번호 |
US-9435098
(2016-09-06)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
8 |
초록
▼
A floating manhole cover system to be installed on a manhole shaft and a road base. The system comprising a precast ring having an inner diameter sized to align with the inner diameter of the manhole shaft; an outer diameter being larger than the outer diameter of the manhole shaft; a top surface to
A floating manhole cover system to be installed on a manhole shaft and a road base. The system comprising a precast ring having an inner diameter sized to align with the inner diameter of the manhole shaft; an outer diameter being larger than the outer diameter of the manhole shaft; a top surface to engage with the road top finish (asphalt or concrete); a bottom surface to engage with the road base through cast in place concrete and to allow the precast-ring to move with a heave action of the road base and road. The system further having a manhole cover receiving means casted in to receive a manhole cover, and a leveling means casted in to engage with the manhole shaft to level said precast-ring with the road.
대표청구항
▼
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
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, whereby said precast-ring is independent of said manhole shaft and moves with a heave action of the road and the road base. 2. The floating manhole cover system of claim 1, wherein said manhole cover receiving means comprising: a. a plurality of receiving couplers casted and embedded inside said precast-ring, andb. a manhole-cover-ring having a recess to receive said manhole-cover, said manhole-cover-ring having apertures to receive a plurality of bolts, wherein said bolts engage with said plurality of couplers embedded inside said precast-ring to secure said manhole-cover-ring on said precast-ring. 3. The manhole cover system of claim 1, wherein said leveling means comprising a plurality of adjustable length leveling legs that extend through the bottom surface of the precast-ring and are aligned to sit on the manhole shaft, thereby, the heights of said legs are adjusted to align and level the manhole-cover with the level and the slope of the road. 4. The floating manhole cover of claim 1, wherein said floating precast-ring is made of a precast concrete. 5. The floating manhole cover of claim 1, wherein said floating precast-ring is made of a fiber reinforced plastic. 6. The floating manhole cover of claim 1, wherein said floating ring is armored with steel rods. 7. The floating manhole cover of claim 1, wherein said sealing tube is an accordion shape rubber gasket having clamping means to attach to said precast-ring and to said manhole-shaft, thereby the height of said gasket changes with the heave action of the road. 8. The floating manhole cover of claim 1, further having an insulating means to insulate said gap between the manhole-shaft and the floating precast-ring. 9. The floating manhole cover of claim 8, wherein said means to insulate the gap between the manhole-shaft and the floating precast-ring is an insulating foam spray or an insulation membrane. 10. The floating manhole cover of claim 1, wherein said precast-ring is cylindrical. 11. The floating manhole cover of claim 10, wherein said outer diameter of said floating precast-ring is at least 50 cm larger than the outer diameter of the manhole-shaft. 12. The floating manhole cover of claim 1, wherein said precast-ring has a circular outer shape and has a square or a rectangular inner opening. 13. A floating catch basin cover system to be installed on a catch basin shaft having an inner opening and an outer diameter, and a road base, said system comprising: a. a precast-ring having a square or a circular inner opening to align with the inner opening of the catch basin; an outer diameter being at least 25 cm larger than the outer diameter of the catch basin; 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 catch basin cover receiving means casted in the precast-ring to receive a catch basin cover frame;c. a leveling means accessible from the top surface and extending out of said bottom surface to engage with but not attached to the catch basin to level and adjust the level and slop of the precast-ring with the road wherein said leveling means provides a gap between said precast-ring and said catch basin;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 catch basin, thereby preventing flow of any gases out of the catch basin and inflow of surface rain water and underground water into the catch basin, wherein said gap between the bottom of the precast-ring and the top of the catch basin is sealed with an insulating spray foam,whereby said precast-ring is independent of said catch basin and moves with respect to the heave action of the road and the road base. 14. A method of installing a manhole cover, comprising: a. obtaining a floating precast manhole cover system having a manhole-cover-ring, a precast-ring, a set of leveling legs;b. cutting around a manhole-shaft to a predetermined distance from the edge of the manhole-cover-ring using a circular extractor, and exposing the top of a manhole shaft wall;c. obtaining an insulation membrane with a predetermined size and placing said insulation around the manhole-shaft wall;d. compacting an exposed road base around the manhole shaft wall;e. placing said precast-ring on top of the manhole using a lifter so that the levelling legs sit on top of the manhole shaft wall;f. leveling the top of the manhole cover ring with the road top level and slope of the road in two direction, by adjusting the height of the levelling legs;g. filling a gap between the road base and the precast ring with a fresh cast-in-place-concrete up to the top of the precast ring;h. insulating a gap between the bottom of the precast ring and the top of the manhole shaft wall using an insulating spray or an insulation membranes; andi. installing an accordion shape rubber gasket between said precast-ring and said manhole-shaft using clamping means to secure and seal said gasket. 15. The method of installing a manhole cover of claim 14, wherein said cast-in-concrete is poured up to the road top if the road finish is concrete, and wherein said cast-in-concrete is poured to the top level of the pre-cast ring if the road finish is asphalt.
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