IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0494105
(2009-06-29)
|
등록번호 |
US-8469628
(2013-06-25)
|
발명자
/ 주소 |
- Miller, Richard L.
- Miller, Stephen L.
|
출원인 / 주소 |
- J.S. Land Management Corporation
|
대리인 / 주소 |
Bever, Hoffman & Harms, LLP
|
인용정보 |
피인용 횟수 :
14 인용 특허 :
23 |
초록
▼
A concrete lid for an in-ground utilities box includes a reinforcement structure filled with concrete. The reinforcement structure includes a plastic frame and one or more reinforcing trusses that extend between opposing sidewalls of the plastic frame. The reinforcing trusses also extend substantial
A concrete lid for an in-ground utilities box includes a reinforcement structure filled with concrete. The reinforcement structure includes a plastic frame and one or more reinforcing trusses that extend between opposing sidewalls of the plastic frame. The reinforcing trusses also extend substantially between the upper and lower edges of the opposing sidewalls. For example, a reinforcing truss may include a flat truss member that is substantially coplanar with the lower edges of the sidewalls, and an arched truss member that extends towards (but does not reach) a plane defined by the upper edges of the sidewalls. The reinforcing trusses include openings that allow wet concrete to pass through. The sidewalls of the plastic frame protect the edges of the lid from damage. The reinforcing trusses reinforce the concrete lid, eliminating the need for separate reinforcement material.
대표청구항
▼
1. A lid for an in-ground utilities box, comprising: a concrete core having an upper surface exposed at an upper surface of the lid and a lower surface exposed at a lower surface of the lid;a plastic frame structure having a plurality of sidewalls laterally surrounding the concrete core; andone or m
1. A lid for an in-ground utilities box, comprising: a concrete core having an upper surface exposed at an upper surface of the lid and a lower surface exposed at a lower surface of the lid;a plastic frame structure having a plurality of sidewalls laterally surrounding the concrete core; andone or more reinforcing trusses, each attached to a pair of opposing sidewalls of the plastic frame, wherein each of the one or more reinforcing trusses includes: a first truss member that is substantially coplanar with the lower surface of the lid, and extends between the pair of opposing sidewalls; anda second truss member coupled to ends of the first truss member, adjacent to the pair of opposing sidewalls, wherein the second truss member forms an arch that extends between the ends of the first truss member, and extends toward the upper surface of the lid. 2. The lid of claim 1, wherein the one or more reinforcing trusses are not exposed at the upper surface of the lid. 3. The lid of claim 2, wherein the one or more reinforcing trusses are exposed at the lower surface of the lid. 4. The lid of claim 1, further comprising a plurality of connector elements formed on the pair of opposing sidewalls of the plastic frame, wherein each of the one or more reinforcing trusses is attached to the pair of opposing sidewalls of the plastic frame by the connector elements. 5. The lid of claim 4, wherein the connector elements comprise slots formed on the pair of opposing sidewalls of the plastic frame, wherein each of the one or more reinforcing trusses include ends that are fitted into the slots. 6. The lid of claim 1, further comprising one or more openings located between the first truss member and the second truss member of each of the one or more reinforcing trusses, wherein portions of the concrete core are located within the one or more openings. 7. The lid of claim 6, wherein each of the one or more openings has a triangular shape. 8. The lid of claim 6, further comprising one or more truss members connecting the first truss member to the second truss member. 9. The lid of claim 6, further comprising one or more gussets located along the second truss member. 10. The lid of claim 1, wherein the plastic frame structure and each of the one or more reinforcing trusses are made of the same material. 11. The lid of claim 1, wherein the sidewalls exhibit a rolled edge at the upper surface of the lid. 12. The lid of claim 1, wherein the first reinforcing truss is only attached to the plastic frame structure at the pair of opposing sidewalls. 13. The lid of claim 1, wherein the first reinforcing truss is substantially surrounded by the concrete core. 14. The lid of claim 1, wherein the plastic frame structure is a continuous structure, wherein the sidewalls extend from the upper surface of the lid to the lower surface of the lid. 15. The lid of claim 1, wherein the one or more reinforcing trusses are not exposed through the concrete core at the upper surface of the lid. 16. The lid of claim 11, wherein each of the one or more reinforcing trusses includes a pair of end posts coupled to the ends of the first truss member, wherein the end posts contact the rolled edge. 17. A reinforcement structure for a concrete lid comprising: a plastic frame structure having a plurality of sidewalls that exhibit an upper edge and a lower edge;one or more reinforcing trusses, each attached to opposing sidewalls of the plastic frame, wherein each of the one or more reinforcing trusses includes: a first truss member that is substantially coplanar with the lower edge of the plastic frame structure, and extends between the pair of opposing sidewalls; anda second truss member coupled to ends of the first truss member, adjacent to the pair of opposing sidewalls, wherein the second truss member forms an arch that extends between the ends of the first truss member, and extends toward the upper edge of the plastic frame structure. 18. The reinforcement structure of claim 17, further comprising a plurality of connector elements formed on the opposing sidewalls of the plastic frame structure, wherein each of the one or more reinforcing trusses is attached to the opposing sidewalls of the plastic frame structure by the connector elements. 19. The reinforcement structure of claim 17, further comprising one or more openings located between the first truss member and the second truss member. 20. The reinforcement structure of claim 17, further comprising one or more truss members connecting the first truss member to the second truss member. 21. A method of forming a concrete lid for a utilities box, the method comprising: attaching one or more reinforcing trusses to opposing sidewalls of a plastic frame, wherein the opposing sidewalls exhibit upper edges that define an upper surface of the lid, and lower edges that define a lower surface of the lid, and wherein each of the one or more reinforcing trusses includes a first truss member that is substantially coplanar with the lower edges of the opposing sidewalls when the one or more reinforcing trusses are attached to the opposing sidewalls, and a second truss member that forms an arch that extends between ends of the first truss member;engaging the upper edges of the opposing sidewalls with a mold;filling the plastic frame with concrete, wherein the concrete is contained by the plastic frame and the mold, wherein the concrete substantially surrounds the one or more reinforcing trusses;curing the concrete, thereby creating cured concrete that bonds to the plastic frame and the one or more reinforcing trusses; andremoving the mold from the plastic reinforcing structure and the cured concrete. 22. The method of claim 21, further comprising forming a pattern in the concrete with the mold. 23. The method of claim 21, further comprising forming one or more lift holes in the concrete with the mold.
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