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Manhole grade adjusting ring and method

  • US 5,209,601 A
  • Filed: 08/14/1991
  • Issued: 05/11/1993
  • Est. Priority Date: 08/14/1991
  • Status: Expired due to Fees
First Claim
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1. A manhole grade adjusting ring for installation in a manhole frame to raise the level of a manhole cover, comprising:

  • a ring including circular bar and skirt portions, said bar portion having a base surface for being supported on the manhole frame and a platform surface above said base surface for supporting the manhole cover, and said skirt portion extending above said platform surface;

    wherein said ring is split so as to define first and second ends adjacent to one another;

    an expansion lock having a first end, a second end and a V-shaped expansion joint between said first and second ends;

    means for securing the first end of the expansion lock to the first end of the ring with the expansion lock bridging the first and second ends of the ring and the V-shaped expansion joint pointing inward of said ring; and

    adjustable means for securing the second end of the expansion lock to the second end of the ring, said adjustable means allowing said second end of the lock to be releasably secured to the second end of the ring at different positions on said second end of the ring so as to vary the position of the first and second ends of the ring relative to one another.

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