초록 ▼

An assembly for adjusting the elevation of a structure such as a manhole or a catch basin to be surrounded by pavement. A one-piece is formed to be inserted between a base rim and a cover of the structure. A lower member of the adapter is received in the base rim to be supported on an internal shoul

An assembly for adjusting the elevation of a structure such as a manhole or a catch basin to be surrounded by pavement. A one-piece is formed to be inserted between a base rim and a cover of the structure. A lower member of the adapter is received in the base rim to be supported on an internal shoulder. An upper member extends outwardly of the lower member to receive the cover and upwardly to engage the upper end of the base rim and form an upward extension of the rim. The elevation of the structure may be increased by inserting the adapter between the base rim shoulder and the cover and decreased by removing the adapter from between the base rim shoulder and the cover. Additional adapters of identical construction may be inserted to further increase the elevation of the structure, all the adapters being nestable within one another.

대표청구항 ▼

1. An assembly for adjusting the elevation of a structure having a base rim surrounded by pavement, the base rim comprising an outer wall and a support shoulder extending inwardly from the wall and spaced downwardly from an upper end thereof, the assembly comprising a cover, and an adapter formed in

1. An assembly for adjusting the elevation of a structure having a base rim surrounded by pavement, the base rim comprising an outer wall and a support shoulder extending inwardly from the wall and spaced downwardly from an upper end thereof, the assembly comprising a cover, and an adapter formed in a single piece to support the cover thereon and having upper and lower members, the lower member being receivable within the wall of the base rim to be supported on the shoulder thereof, the upper member extending outwardly of the lower member to receive the cover therewithin and upwardly to engage the upper end of the base rim and form an upward extension thereof, the lower member being formed with a plurality of inwardly extending protrusions distributed to form spaces therebetween and interconnecting the upper and lower members to form steps at the protrusions, the cover being receivable within the upper member to be supported on the lower member, the cover being formed with a plurality of indentations in a lower surface thereof, the indentations being dimensioned and disposed to receive the adapter protrusions therewithin, portions of the cover above the indentations being dimensioned and disposed to be supported on the steps, whereby the elevation of a structure may be increased by supporting the assembly on the base rim of the structure and decreased by removing the adapter from between the base rim shoulder and the cover.