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US 8,540,454 B2Granted
Manhole cover
OwnerJae Duk Leeinventor
Life of this patent
Estimating the term…
Abstract
A manhole cover which has an upper body and a lower body coupled to each other to maintain balance, to endure loads applied from an external source in a stable manner, to protect the inside of the manhole from the ingress of rainwater, and to enable the upper body to be stably fixed inside the lower body.
Claims17
A manhole cover, comprising
- a lower body, the inside of which is hollow, with a spiral rib formed along the inner surface of the hollow space, and convex-concave portions formed on the upper surface of the spiral rib;
- an upper body which is coupled with the lower body inside the latter, and the inside of which is hollow, with a spiral rib and convex-concave portions formed along outer surface of the upper body to correspond to the spiral rib and convex-concave portions of the lower body, and a stepped portion formed at the upper surface of the upper body;
- a lid mounted on the stepped portion of the upper body to prevent the ingress of foreign matter into the inside of the upper body;
- and
- a waterproofing means removably arranged inside the upper body to prevent the ingress of rainwater into the inside of the manhole, wherein the waterproofing means comprises:
- a waterproofing plate which is seated on a catching projection formed on the inner surface of the upper body to prevent ingress of rainwater;
- a first packing member attached to edge of said waterproofing plate so as to wrap the edge, upper portion of the member being extended to upper end of the waterproofing plate and lower portion being in close contact with the catching projection so as to wrap the edge of the waterproofing plate;
- and
- a pressing ring arranged over said waterproofing plate and pressing the first packing member extended to the upper end of the waterproofing plate into close contact with the inner surface of the upper body, thereby achieving a tight waterproof.
6 more elements
A manhole cover, comprising
- a lower body, the inside of which is hollow, with a spiral rib formed along the inner surface of the hollow space, and a plurality of thread holes formed extending into the inside of the lower body;
- an upper body which is coupled with the lower body inside the latter, and the inside of which is hollow, with a spiral rib formed along outer surface of the upper body to correspond to the spiral rib of the lower body, and a plurality of guide projections formed between the spiral ribs in a height direction of the upper body, and a stepped portion formed at the upper surface of the upper body;
- bolts fitted through the thread holes of the lower body to press the upper body between the guide projections thereof, thereby supporting the upper body and at the same time preventing rotation of the upper body;
- a lid mounted on the stepped portion of the upper body to prevent the ingress of foreign matter into the inside of the upper body;
- and
- a waterproofing means removably arranged inside the upper body to prevent the ingress of rainwater into the inside of the manhole, wherein the waterproofing means comprises
- a waterproofing plate which is seated on a catching projection formed on the inner surface of the upper body to prevent ingress of rainwater;
- a first packing member attached to edge of said waterproofing plate so as to wrap the edge, upper portion of the member being extended to upper end of the waterproofing plate and lower portion being in close contact with the catching projection so as to wrap the edge of the waterproofing plate;
- and
- a pressing ring arranged over said waterproofing plate and pressing the first packing member extended to the upper end of the waterproofing plate into close contact with the inner surface of the upper body, thereby achieving a tight waterproof.
7 more elements
A manhole cover, comprising
- a lower body, the inside of which is hollow, with a spiral rib formed along the inner surface of the hollow space, and a plurality of catching grooves formed in a direction perpendicular to said spiral rib and at a constant interval;
- an upper body with a spiral rib formed along outer surface of the upper body to correspond to the spiral rib of the lower body such that the upper body can be coupled with the lower body inside the latter, and a plurality of catching grooves formed in a direction perpendicular to said spiral rib of the upper body and at a constant interval, and a stepped portion formed at the upper portion of the upper body;
- a plurality of catching rods which are installed between the upper body and lower body through the stepped portion and fitted in the catching grooves formed in the spiral ribs of the upper and lower bodies, thereby preventing the upper body from rotating inside the lower body;
- a lid mounted on the stepped portion of the upper body to prevent foreign matter from ingressing into the inside of the upper body;
- and
- a waterproofing means removably arranged inside the upper body to prevent the ingress of rainwater into the inside of the manhole, wherein the waterproofing means comprises
- a waterproofing plate which is seated on a catching projection formed on the inner surface of the upper body to prevent ingress of rainwater:
- a first packing member attached to edge of said waterproofing plate so as to wrap the edge, upper portion of the member being extended to upper end of the waterproofing plate and lower portion being in close contact with the catching projection so as to wrap the edge of the waterproofing plate;
- and
- a pressing ring arranged over said waterproofing plate and pressing the first packing member extended to the upper end of the waterproofing plate into close contact with the inner surface of the upper body, thereby achieving a tight waterproof.
7 more elements
Dependencies are inferred from the claim text.