Tile levelling device

Abstract

A levelling device for tiles of the type used on a surface to level at least two adjacent tiles and comprising a base (1) designed to be arranged between at least two adjacent tiles (2) to act through contact with part of the lower surfaces of the said mutually adjacent tiles; from the base (1) there originates an elongated body (3), extending orthogonally therefrom, which is sized so as to protrude with respect to the upper surfaces of the tiles (2), is endowed with an external threaded section (31) whose task is to allow the said body to be gripped from the outside, and comprises a pressure and levelling body (4) which acts through contact with at least one of the upper surfaces of the at least two adjacent tiles (2); a handling unit (5), whose task is to allow the threaded section (31) to be gripped from the outside. The handling unit (5) is structured as at least two parts which are elastically secured but are divided in the upper area, where at least two nut screw portions (15) are formed which, once brought together in mutual contact, form a single nut screw or threaded hole (25) with which the threaded stretch (31) can be coupled. The handling unit (5) comprises a pressure surface (35), consisting of a portion of external frustoconical surface sized to couple exactly when in contact with the support surface (42), also shaped so as to generate, overall, a portion of internal frustoconical surface, which is formed integrally with and coaxially to the said pressure and levelling body (4), within which the said portion is axially positioned and sized so as to fully support the thrust exerted thereupon by the coaxial coupling with the pressure surface (35) of the handling unit (5). The said handling unit may be coupled freely so as to rotate around the axis common to the pressure and levelling body (4).

1 - 6 . (canceled) 
     
     
         7 . A tile levelling device of the type used on a surface to level at least two adjacent tiles and comprising:
 a base designed to be arranged between at least two adjacent tiles to act through contact with part of the lower surfaces of the said mutually adjacent tiles; from the base there originating an elongated body, extending orthogonally therefrom; the said elongated body being sized so as to protrude with respect to the upper surfaces of the tiles and being endowed with an external threaded stretch whose task is to allow the said body to be gripped from the outside;   a pressure and levelling body comprising a lower edge endowed with a flat support surface designed to operate through contact with at least one of the upper surfaces of the at least two adjacent tiles;   a handling unit, whose function is to allow the said device to be gripped from the outside of the said threaded stretch, the said handling unit being structured for the purpose by means of at least two parts which are elastically linked to the base thereof but divided in the upper area, where at least two portions of a nut screw are obtained which are designed, once brought into mutual contact, to be composed so as to form a single nut screw or threaded hole with which the said threaded stretch may be coupled; the said handling unit comprising a pressure surface arranged to interact coaxially when in contact with a corresponding support surface which is formed integrally with and coaxially to the said pressure and levelling body in which the said surface is axially positioned and sized so as to fully bear the thrust exerted thereon at the coaxial coupling by the pressure surface of the said handling unit; the said handling unit being freely coupled so as to rotate around the axis common to the pressure and levelling body through the mutual coupling of the respective pressure surface and support surface; the pressure surface consisting of a portion of an external frustoconical surface sized so as to couple exactly when in contact with the support surface, which is also shaped in such a way as to generate, overall, a portion of an internal frustoconical surface.   
     
     
         8 . A levelling device for tiles according to  claim 7 , wherein pressure surface and the support surface are arranged coaxially with respect to the longitudinal axis of the handling unit and to the longitudinal axis of the pressure and levelling body. 
     
     
         9 . A levelling device for tiles according to  claim 7 , wherein the two parts into which the handling unit is divided are elastically secured to the base by means of two U-shaped elements positioned diametrically opposite the base, which is made as a single piece with the entire handling unit. 
     
     
         10 . A levelling device for tiles according to  claim 8 , wherein the pressure surface, sized so as to couple exactly when in contact with the support surface and shaped in such a way as to generate a portion of the surface as a whole, and the said support surface are smooth so as to be able to mutually rotate around the common longitudinal axis. 
     
     
         11 . A levelling device for tiles according to  claim 10 , wherein the lower edge of the pressure and levelling body has a circular shape and has axial symmetry with respect to the longitudinal axis of the pressure and levelling body; the said lower edge being endowed with an internal annular surface whose function is to house, therewithin and having a guide function, an outer circular portion located at the base of the handling unit; it being envisaged that during the coupling of the pressure surface and the support surface the lower portion of the outer circular portion does not come into contact with the inner annular surface. 
     
     
         12 . A levelling device for tiles according to  claim 11 , wherein the internal annular surface is delimited at the top thereof by a plurality of stop teeth designed to curb unwanted upward movements of the handling unit, acting, when necessary, on the outer circular portion.