Manhole grade adjusting ring and method

Details Manhole grade adjusting ring and method Manhole grade adjusting ring and method

B - Operations, Transporting

65

D

B65D 90/10 (2006.01) E02D 29/12 (2006.01) E02D 29/14 (2006.01)

Patent

CA 2050833

A manhole grade adjusting ring has an adjustable diameter with a V-shaped expansion lock bridging the ends of the ring. The expansion lock has radial flanges which are adjustably pinned in slots in the ends of the ring after the ring is expanded or contracted to fit a particular manhole frame using an expansion/contraction tool. The "V" is then hammered to expand the diameter of the ring so as to form a tight friction fit between the ring and the manhole frame.

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