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특허 상세정보

Securable temporary manhole cover

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) E02D-029/14   
미국특허분류(USC) 404/025
출원번호 US-0347996 (2006-02-06)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 5  인용 특허 : 15

An improved temporary manhole insert for securing a manhole passageway having a generally cylindrical structure with an inflatable, ring like tube encompassing the outer rim of the rigid portion of the insert. The insert with the inflatable ring is placed within the manhole aperture and then inflated to expand until the insert is secured in position. The manhole insert of the present invention prevents debris such as rocks, dust, asphalt and other debris from falling into the manhole during adjustments to the casting and also prevents debris from going i...


What is claimed in new and desired protected Letters Patent is set forth in the appended claims: 1. An inflatable manhole insert comprising: a) a center cap; b) a closed, flexible member forming an inflatable body connected to the periphery of said manhole insert; c) a plurality of sealing veins extending from the outer circumference of said inflatable body; d) means for selectively inflating and deflating said inflatable body; e) a plurality of bolt recesses evenly spaced proximal the peripheral edge of said center cap; f) a connection ring integral wi...

이 특허에 인용된 특허 (15)

  1. Zappe, Raymond. Cover apparatus for an access opening. USP2004016682257.
  2. Zappe, Raymond. Cover apparatus for an access pipe opening. USP2005056887012.
  3. Frishauf Stephen H. (54 Riverside Dr. ; Apt. 6C New York NY 10024-6551). Emergency maintenance hole cover, and method of installation. USP1991105052851.
  4. Brockway Robert D. ; Richardson Lester F.. Expandable band and locking mechanism. USP2000116152455.
  5. Brockway, Robert D.. Expandable band and locking mechanism. USP2005106953194.
  6. Mathison Allen D. (Richfield MN) Nelson Dale K. (Minneapolis MN). Expansible pneumatic plug device. USP1986094614206.
  7. Rzesutock Michael P. (Fayetteville OH) Clevenger Neal A. (Cincinnati OH). Inflatable manhole sealing device. USP1994085333653.
  8. Odill Frank J. (West Allis WI) Anderson David E. (Elk River MN). Manhole chimney seal. USP1984094469467.
  9. Pelsue Thurman A. (3706 S. Hibiscus Way Denver CO 80237). Manhole extension. USP1977064029425.
  10. Bowman Harold M.. Manhole frame assembly. USP1999126007270.
  11. Kulp Leon (426 Bridge St. Catasauqua PA 18032) Noggle Donald E. (102K Village Round Wescosville PA 18106). Manhole leakage indicator and method for using. USP1983024373381.
  12. Thompson William B. (Orlando FL) Conklin James T. (Orlando FL). Packer for sealing pipe leaks. USP1976033946761.
  13. Mathison Allen D. (Richfield MN) Nelson Dale K. (Minneapolis MN). Pipe joint sealing and testing apparatus. USP1988084763511.
  14. Vollmar Ronald D. (1809 Clark St. Muncie IN 47301). Process for raising manholes. USP1977094050839.
  15. Muir David J. (Farmington Hills MI) Mason James J. (New Hudson MI). Universal stackable manhole shield. USP1991095046886.