Patent ID: 6527476
Filing Date: 2003-03-04
Classification: B65D

Abstract:
A manhole assembly for a below ground liquid storage tank and for installation at and below vehicular surfacing material, said manhole assembly comprising:an at-grade manhole having a continuous top ring for being secured substantially by and at-grade of the surfacing material, a below-grade manhole having a continuous rim located within said at-grade manhole, said rim defining a hatchway, and a hatch cover being rotatably mounted to said rim for operatively opening and closing access through said hatchway, and means for maintaining said rim at a first predetermined maximum distance below said ring not withstanding post installation settling of the tank or post installation settling of said below-grade manhole or in response to post installation downward forces applied to said rim, and wherein said means comprises at least two members each having one en coupled to said ring and having another part coupled to said rim, each member being spaced from the other members about said ring and said rim.