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US 2017/0342719 A1Published application
Prefabricated spiral staircase
OwnerSeonghwan SEOinventor
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Abstract
The present invention relates to a prefabricated spiral staircase in which the heights between treads can be freely and finely adjusted, thus being conveniently assembled and installed at installation sites having different story heights.
Claims9
A prefabricated spiral staircase, comprising:
- a base configured to be fastened to a floor;
- a center pole configured such that a lower end thereof is installed on the base;
- a plurality of spacers configured to be inserted over the center pole;
- treads each configured such that one side thereof is inserted over the center pole between corresponding adjacent two of the spacers;
- outside stringers each disposed on an opposite side of the tread;
- and
- coupling members each configured to couple the opposite side of the tread to the outside stringer;
- wherein each of the spacers comprises a cylindrical pipe, and a lower or upper cap configured to be inserted over a lower or upper side of the cylindrical pipe;
- and
- wherein one or more height adjustment disks are further disposed internally between the lower cap and a lower end of the cylindrical pipe or between the upper cap and an upper end of the cylindrical pipe.
7 more elements
A spacer coupling structure for a prefabricated spiral staircase, comprising:
- a center pole configured to be fastened to a floor;
- a plurality of spacers configured to be inserted over the center pole;
- and
- treads each configured such that one side thereof is inserted over the center pole between corresponding adjacent two of the spacers;
- wherein each of the spacers comprises a cylindrical pipe, and a lower or upper cap configured to be inserted over a lower or upper side of the cylindrical pipe;
- and
- wherein one or more height adjustment disks are further disposed internally between the lower cap and a lower end of the cylindrical pipe or between the upper cap and an upper end of the cylindrical pipe.
4 more elements
Dependencies are inferred from the claim text.