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특허 상세정보

Structures for supporting manhole covers, grates and the like provided with self-storing adjustable leveling apparatus

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) E02D-029/14   
미국특허분류(USC) 404/26 ; 52/20 ; 210/165
출원번호 US-0235042 (1981-02-17)
발명자 / 주소
인용정보 피인용 횟수 : 29  인용 특허 : 1

This disclosure is concerned with apparatus for enabling extension or other leveling adjustment of manhole cover supporting structures and the like comprising extension spacer rings resiliently compressed in self-storing fashion adjacent a support sleeve portion of the supporting structure, and adapted to be forced downward from storage to expand into position below the sleeve to extend or adjust the level of the same.


Apparatus for providing adjustable leveling of manhole covers, grates and the like within ground and similar structures, having, in combination, a tubular slip ring for supporting a cover, grate and the like near its upper edge, a base ring having a bottom flange mounting a tubular vertical sleeve positioned to receive the slip ring in coaxial telescopic relationship, and resilient spacer ring means fitted under tension coaxially against a wall of the slip ring near its lower edge and adapted, upon lifting of the slip ring along the base ring sleeve, to ...

이 특허를 인용한 특허 피인용횟수: 29

  1. Chris Sondrup. Adjustable drain apparatus. USP2002026350373.
  2. Chris Sondrup. Adjustable floor drain apparatus. USP2002056381775.
  3. Sondrup Chris. Adjustable floor drain apparatus. USP2001086269495.
  4. Sondrup, Chris. Adjustable height utility access device. USP2003026524026.
  5. Chris Sondrup. Adjustable manhole apparatus. USP2002106457901.
  6. Sondrup, Chris. Adjustable manhole apparatus. USP2004026695526.
  7. Suatac, Ismail Cemil. Adjustable manhole cover assembly. USP2004036698973.
  8. Gaspar, Chris. Adjustable support apparatus for a utility access cover. USP2014108858114.
  9. Sondrup, Chris. Adjustable utility access. USP2005106955499.
  10. LeBaron Francis (East Bridgewater MA). Apparatus for securing adjustable support structures for manhole covers, grates and the like. USP1987094690584.
  11. Humphries, Derek; McConnell, James. Channel installation device. USP2009057534071.
  12. Humphries,Derek; McConnell,James. Channel installation device. USP2007087252457.
  13. Geiger Robert A. (356 W. Puce Rd. R.R. #1 Belle River ; Ontario N0R 1A0 CAX). Cover assembly for a ground opening. USP1991034998387.
  14. Humphries,Derek; McConnell,James. Drainage channel installation device. USP2006107125506.
  15. Humphries,Derek; McConnell,James A.. Drainage channel installation device. USP2009037506844.
  16. Humphries, Derek; Humpage, Roy; Mayo, Gary Edwin. Drainage grate assembly. USP2005066908256.
  17. Ditcher Jack (Langhorne PA). Drop manhole precast encasement. USP1986014566483.
  18. Howie, Cameron Gordon. Entryway protective collar. USP20190210214345.
  19. Bonell, Ryan; Shokouhi, Hassan. Floating manhole cover assembly. USP20190310233609.
  20. Sondrup, Chris. Height and angle adjustable utility access device and method. USP2003026520713.
  21. Godfrey, Steven A.. Hydraulically adjustable manhole ring. USP2004026692183.
  22. Munro, John. Integrated frame and cover system. USP2015049011035.
  23. Munro, John. Integrated frame and cover system. USP2013118573883.
  24. Prescott Alain (102 De Gaulle Street Ville de Lorraine CAX J6Z 3Z2). Manhole cover annular support for repaved street. USP1991024995757.
  25. Ditcher, Jack; Ditcher, Eric A.. Manhole riser and cooperating sleeve to provide a waterlock for manhole structures. USP1985094540310.
  26. Mitchell, Andrew C.. Method and apparatus for raising manhole castings. USP2015099127430.
  27. LeBaron Francis (West Bridgewater MA). Method of and apparatus for adjustably leveling manhole covers, grates and the like. USP1987064673310.
  28. P. Dennis McNeely. Nondestructive system for adjusting manhole and catch-basin elevations. USP2002086435764.
  29. Morina John ; Ryan Chester. Roadway access device and method of using same. USP2000036036401.