초록 ▼

An adjustment ring for raising a cover which fits over an opening of a casting fixed in a road surface is provided and comprises a plurality of ring sections mounted upon the casting. Each section has spaced apart first and second ends with the first end of each section being adapted to overlap the

An adjustment ring for raising a cover which fits over an opening of a casting fixed in a road surface is provided and comprises a plurality of ring sections mounted upon the casting. Each section has spaced apart first and second ends with the first end of each section being adapted to overlap the second end of each adjacent section such that the overlapping ends of the consecutively adjacent sections form the ring into a shape complimentary to that of the casting. The overlapping sections are secured to one another by screws. The perimeter of the ring can be adjusted by altering the extent of overlap between adjacent sections. Each section includes a support surface for supporting the cover or grate.

대표청구항 ▼

An adjustment ring for raising a cover which normally fits over an opening of a casting fixed in a support surface to the elevation of said support surface, said ring comprising: a plurality of ring sections supported by said casting and having spaced apart first and second ends, said first end of e

An adjustment ring for raising a cover which normally fits over an opening of a casting fixed in a support surface to the elevation of said support surface, said ring comprising: a plurality of ring sections supported by said casting and having spaced apart first and second ends, said first end of each of said ring sections being adapted to overlap said second end of each adjacent ring section such that the overlapping ends of the consecutively adjacent ring sections form said ring into a shape complimentary to that of said casting, each of said first and second ends of said sections having a plurality of teeth, said teeth of said first end being disposed in a direction opposite to that of said teeth in said second end such that at least some of said teeth of said overlapping ends intermesh with one another, support means on said sections for supporting said cover, and securing means for securing said overlapping ends together.