IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0845550
(2007-08-27)
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등록번호 |
US-7484909
(2009-02-03)
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발명자
/ 주소 |
- Brady,Robert C.
- Brady,Aidan R.
|
출원인 / 주소 |
|
대리인 / 주소 |
Van Dyke, Gardner, Linn & Burkhart, LLP
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인용정보 |
피인용 횟수 :
7 인용 특허 :
28 |
초록
▼
A lightweight manhole cover assembly includes a cover and a base, with the cover including an inner surface having a plurality of ribs extending therefrom. The base includes an inner surface having a plurality of receptacles extending therefrom. The receptacles of the base have a layout that corresp
A lightweight manhole cover assembly includes a cover and a base, with the cover including an inner surface having a plurality of ribs extending therefrom. The base includes an inner surface having a plurality of receptacles extending therefrom. The receptacles of the base have a layout that corresponds to the ribs of the cover, such that the ribs are adapted to be inserted into the receptacles.
대표청구항
▼
The invention claimed is: 1. A manhole cover assembly, comprising: a cover having a first inner surface; and a base adapted for connecting to said cover, said base having a second inner surface; a plurality of receptacles extending from one of said first and second inner surfaces and a plurality of
The invention claimed is: 1. A manhole cover assembly, comprising: a cover having a first inner surface; and a base adapted for connecting to said cover, said base having a second inner surface; a plurality of receptacles extending from one of said first and second inner surfaces and a plurality of ribs extending from the other of said first and second inner surfaces, wherein said plurality of receptacles have a layout that generally corresponds to a layout of said plurality of ribs, wherein said ribs and said receptacles are configured to insert said ribs in said receptacles and to retain said ribs in said receptacles to assist in retaining said base and said cover together and to impart structural strength and stiffness to said assembly. 2. The manhole cover assembly of claim 1, wherein said plurality of ribs and said plurality of receptacles space said cover from said base. 3. The manhole cover assembly of claim 2, wherein a periphery of said cover abuts a periphery of said base. 4. The manhole cover assembly of claim 1, including an adhesive adhering said plurality of ribs and said plurality of receptacles together to retain said ribs in said receptacles. 5. The manhole cover assembly of claim 1, wherein said ribs are form-fitted with said receptacles to retain said ribs in said receptacles. 6. The manhole cover assembly of claim 1, wherein said ribs extending from said first inner surface of said cover and said receptacles extending from said second inner surface of said base. 7. The manhole cover assembly of claim 1, wherein said cover and said base are formed from a polymeric material. 8. The manhole cover assembly of claim 1, wherein said cover and said base have corresponding positioning members to align said cover and said base. 9. The manhole cover assembly of claim 1, wherein said receptacles extending from said first inner surface of said cover and said plurality of ribs extending from said second inner surface of said base. 10. The manhole cover assembly of claim 1, wherein a portion of said ribs and said receptacles are extending from said first inner surface of said base and wherein another portion of said ribs and said receptacles are extending from said first inner surface of said cover, wherein said portion of said ribs and said receptacles have generally the same layout as said another portion of said ribs and said receptacles, whereby said cover and said base may be formed from a common mold configuration. 11. A manhole cover assembly, comprising: a cover having a first inner surface, said cover further having a first plurality of ribs and a first plurality of receptacles extending from said first inner surface of said cover; a base adapted for connecting to said cover, said base having a second inner surface, said base further having a second plurality of ribs and a second plurality of receptacles extending from said second inner surface of said base, wherein a layout of said second plurality of ribs and said second plurality of receptacles on said base is generally the same as a layout of said first plurality of ribs and said first plurality of receptacles on said cover; and wherein with said second inner surface of said base aligned to face said first inner surface of said cover, said first plurality of ribs and said second plurality of receptacles are configured to insert said first plurality of ribs in said second plurality receptacles and to retain said first plurality of ribs in said second plurality of receptacles, wherein said second plurality of ribs and said first plurality of receptacles are configured to insert said second plurality of ribs in said first plurality of receptacles and to retain said second plurality of ribs in said first plurality of receptacles to assist in retaining said base and said cover together and to impart structural strength and stiffness to said assembly. 12. The manhole cover assembly of claim 11, wherein each of said rows includes at least one of said first and second plurality of ribs and at least one of said first and second plurality of receptacles. 13. The manhole cover assembly of claim 11, wherein said cover and said base are generally rectangular in shape. 14. The manhole cover assembly of claim 11, wherein said cover has a plurality of apertures therethrough, said apertures being arranged between said first ribs and said first plurality of receptacles. 15. The manhole cover assembly of claim 11, wherein at least a portion of said base is removed between said second plurality of ribs and said second plurality of receptacles to create at least one opening in said base. 16. The manhole cover assembly of claim 11 including an adhesive adhering said ribs and said receptacles to retain said ribs in said receptacles. 17. The manhole cover assembly of claim 11 wherein said ribs are form-fitted with said receptacles to retain said ribs in said receptacles. 18. The manhole cover assembly of claim 11, wherein said layout of said first plurality of ribs and said first plurality of receptacles of said cover and said layout of said second plurality of ribs and said second plurality of receptacles of said base comprise at least two parallel rows and at least two parallel columns on said cover and said base, said rows being generally perpendicular to said columns. 19. The manhole cover assembly of claim 18, wherein each of said columns includes at least one of said first and second plurality of ribs and at least one of said first and second plurality of receptacles. 20. The manhole cover assembly of claim 11, wherein said cover and said base are formed from a polymeric material. 21. The manhole cover assembly of claim 20, wherein said cover and said base are manufactured by injection molding and formed from a common mold configuration. 22. A method of assembling a manhole cover assembly, comprising: providing a cover and a base, said cover having a first inner surface, said cover further having a first plurality of ribs and a first plurality of receptacles extending from said first inner surface of said cover, and said base having an inner surface, said base further having a second plurality of ribs and a second plurality of receptacles extending from a second said inner surface of said base, wherein a layout of said second plurality of ribs and receptacles on said base is generally the same as a layout of said first plurality of ribs and the first plurality of receptacles on said cover; molding said cover and said base from a common mold design; aligning said cover and said base such that said first plurality of ribs of said cover are adapted to be inserted into said second plurality of receptacles of said base, and wherein said second plurality of ribs of said base are adapted to be inserted into said first plurality of receptacles of said cover; and inserting said first plurality of ribs of said cover into said second plurality of receptacles of said base and inserting said second plurality of ribs of said base into said first plurality of receptacles of said cover to retain said ribs in said receptacles and thereby assisting in retaining said base and said cover together and to impart structural strength and stiffness to said assembly. 23. The method of claim 22, wherein aligning said cover and said base further comprises rotating said base and said cover to align a portion of said cover with an opposite portion of said base. 24. The method of claim 22, including providing a plurality of apertures in said cover and said base, said apertures positioned between said ribs and said receptacles. 25. The method of claim 22, including machining at least a portion of said base to provide at least one opening between said second plurality of ribs and said second plurality of receptacles in said base. 26. the method of claim 22 including applying an adhesive to said ribs and said receptacles, thereby retaining said ribs in said receptacles. 27. The method of claim 22 wherein said ribs are form-fitted with said receptacles, thereby retaining said ribs in said receptacles. 28. A manhole cover assembly, comprising: a cover and a base connected with said cover at least at a periphery of said base and said cover to form a manhole cover; a gasket adapted to be positioned between said manhole cover and an opening covered by said manhole cover, and wherein said gasket is formed from elastomeric material to resist abrasion between said manhole cover and the opening covered by said manhole cover; wherein said gasket is adapted to assist in retaining said cover and said base together by covering said periphery of said manhole cover and wherein said gasket is adapted to seal between said manhole cover and the opening covered by said manhole cover. 29. The gasket of claim 28, wherein a cross section of said seal is one chosen from generally C-shaped and generally L-shaped.
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