Spiral staircase

Details Spiral staircase Spiral staircase

1984-02-28

1985-07-09

Raduazo, Henry E.

Static structures (e.g., buildings)

Stepped; e.g., stair

Helical type

52726, E04F 1100

Patent

active

045273677

ABSTRACT:
The invention relates to a spiral staircase which features adjustable rise, and whose structure is obtained by the assembly in reciprocal fashion of identical modular components (1) fitted one on top of the next, each component comprising a cylindrical section (2), to which either a step (4) or the support (3) for a separate tread (4) is fixed direct. Each cylindrical section (2) consists of an upper part (6) and a lower part (7), these coaxially disposed and provided with means for their being paired by screwing, as well as with alignment-surfaces which enable the upper part of each component (1) to insert coaxially into the lower part (7) of any of the other components (1), thus remaining stably associated therewith following assembly and creating a single, solid structure in consequence. The type of pairing envisaged permits adjustment of the stair rise--that is, the distance between two successive treads, and therefore between the two modular components themselves, once assembled.

REFERENCES:
patent: 3713260 (1973-01-01), Brauckmann
patent: 4378862 (1983-04-01), Carmel

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