Classifications

• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
  • E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
  • E04F11/02—Stairways; Layouts thereof
  • E04F11/022—Stairways; Layouts thereof characterised by the supporting structure
  • E04F11/032—Spiral stairways supported by a central column
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
  • E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
  • E04F11/02—Stairways; Layouts thereof
  • E04F11/104—Treads

Definitions

• This invention relates to a spiral staircase.
• the widespread use of spiral staircases, in particular for internally connecting rooms which are on different levels of the same building, is mainly due to the fact that they have quite small plan dimensions. Especially in recent decades, this has fully satisfied the requirements of increasingly small homes.
• spiral staircases comprise a vertical central pole, along which steps are applied, at one free end of the steps.
• the series of steps describes a spiral in space, allowing people to ascend or descend the staircase by moving around the pole.
• the free ends of the steps usually support a banister which facilitates movements along the staircase, forming a support for users.
• This invention therefore has for an aim to eliminate the above-mentioned disadvantages.
• the main advantage of this invention is basically the fact that ascending and descending a spiral staircase is significantly facilitated, hi particular, the surface available for supporting the inside foot when passing from one step to another is increased, guaranteeing users greater stability and balance.
• the shape of the steps allows the achievement of an equivalent of the riser - tread ratio which is practically the same for the outside foot and the inside foot.
• the shape of the landing may allow an increase in the number of steps, reducing the riser and achieving an equivalent of the riser - tread ratio which is close to that which can be achieved with straight ramps.
• the structure of the invention guarantees the flexibility necessary for covering any height, thanks to a system for adjusting the height of the steps, for adapting to any plan shape (circular, square, etc.) and to the direction of rotation (clockwise .or anti-clockwise), for production using any material (wood, iron, aluminium, etc.) or colour.
• Figure 1 is a side view of the invention
• Figure 2 is a plan view of a first embodiment of the steps
• Figure 3 is a plan view of a pair of consecutive steps
• Figure 4 is a plan view of a second embodiment of the steps
• Figure 5 is a plan view of two embodiments of the landing.
• the invention relates to a spiral staircase. It comprises a central supporting element (1) and a plurality of steps (2), which are connected to the supporting element (1) at a first end (2a).
• a spiral staircase it comprises two types of steps (21, 22), where a first type of step (21 ) is substantially "L"-shaped and a second type of step (22) is substantially arrow-shaped. They are positioned along the staircase (10) in an alternating fashion, as shown in the detail in Figure 3.
• the first type of step (21) comprises at least one projection (21a) and one recess (21b) which complement at least one projection (22a) and one recess (22b) of the second type of step (22).
• the projections (21a, 22a) and recesses (21b, 22b) contribute to forming on the steps (21, 22) treadable portions (21c, 22c) which are separate from portions (2 Id, 22d) that are not strictly necessary for achieving the advantages which the invention proposes.
• the "L"-shaped step (21) provides support only for the outside foot
• the arrow-shaped step (22) provides support only for the inside foot, both when a person is ascending and descending the staircase (10).
• the staircase (10) also comprises a landing (5), having an edge (5a) shaped like one of the two types of steps (21; 22). Obviously, depending on the shape of the edge (5 a), anyone using the staircase (10) must begin stepping on it starting with the outside foot if the edge (5a) of the landing (5) is shaped like the arrow- shaped step (22), or with the inside foot if the edge (5a) of the landing (5) is shaped like the "L"-shaped step (21). hi the latter case, it is possible to increase the number of steps (2), reducing the riser.
• Figure 1 also shows a banister (3), needed for safety reasons, connected to a second end (2b) of the steps (2), and spacer elements (4), designed to define the riser of the steps (2).

Landscapes

• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Steps, Ramps, And Handrails (AREA)
• Pinball Game Machines (AREA)
• Paints Or Removers (AREA)
• Escalators And Moving Walkways (AREA)

Priority Applications (10)

Applications Claiming Priority (2)

Publications (1)

Family

ID=42225312

Family Applications (1)

Country Status (12)

Families Citing this family (2)

Citations (3)

Family Cites Families (10)

• 2008
  • 2008-11-27 IT IT000007U patent/ITPI20080007U1/it unknown
• 2009
  • 2009-11-27 AU AU2009321169A patent/AU2009321169A1/en not_active Abandoned
  • 2009-11-27 CA CA2744565A patent/CA2744565A1/en not_active Abandoned
  • 2009-11-27 KR KR1020117013100A patent/KR20110101146A/ko not_active Application Discontinuation
  • 2009-11-27 CN CN2009801477852A patent/CN102272395A/zh active Pending
  • 2009-11-27 JP JP2011538104A patent/JP2012510015A/ja active Pending
  • 2009-11-27 EP EP09801809A patent/EP2358954A1/en not_active Withdrawn
  • 2009-11-27 RU RU2011126245/03A patent/RU2011126245A/ru not_active Application Discontinuation
  • 2009-11-27 BR BRPI0921245A patent/BRPI0921245A2/pt not_active Application Discontinuation
  • 2009-11-27 WO PCT/IT2009/000535 patent/WO2010061417A1/en active Application Filing
  • 2009-11-27 US US13/131,308 patent/US20110258946A1/en not_active Abandoned
  • 2009-11-27 MX MX2011005581A patent/MX2011005581A/es not_active Application Discontinuation

Patent Citations (3)

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