Patent Publication Number: US-5836040-A

Title: Tool for applying varnish, glue or any other material requiring smoothing

Description:
This patent application concerns a tool for smoothing varnish, glues or other materials. 
     The tool in question has no precedents in the state of the art and is designed to facilitate the work of those who, above all in the building trade, need to apply and smooth parquet varnish, tiling glue or any other fluid or semi-fluid material to flooring. Since no specific tools exist for this job, horizontal surfaces are generally smoothed by hand with the labourer working on his knees or in a crouched position to smooth down the fluid material with a spatula. 
     In order to perform this job correctly, the worker holds the spatula, which has a handle fitted at the centre of the upper surface, so that the longitudinal axis is perpendicular to the axis of the worker&#39;s forearm; the worker then places the spatula on the material and works the spatula alternatively to the left and to the right with rotating movements of his wrist. The spatula thus traces semi-circular patterns on the fluid material, which are considered to be ideal for smoothing fluid material. 
     The above description of the procedure for smoothing down surfaces reveals that this is very strenuous work which a labourer will perform for many hours during the day. 
     The work is tiring not only because of the uncomfortable position, crouched or stooped, in which the operator works, but also because of the considerable effort of &#34;rubbing&#34; the spatula for many hours a day against the material with a very short lever, namely the forearm of the worker. 
     The inventive idea is to design a tool which allows the worker to perform the job of smoothing down a fluid material in the same way--namely with the same semi-circular movement of the spatula against the surface of the fluid material--but which can at the same time reduce the effort required by the worker. Thanks to the tool according to the invention, the labourer can in fact work in a more comfortable standing position with a longer lever that significantly reduces the effort required to &#34;rub&#34; the fluid material. 
     The tool in question consists essentially of a long handle fitted at the bottom end with a pair of parallel metal brackets having transversally perforated ends; a parallelepiped metal block supporting the spatula is hinged between said two brackets by means of a pin fitted between the perforated ends. 
     This parallelepiped block rotates freely upwards and downwards between said brackets but can also be fixed securely by means of a wing nut into a suitable position. 
     This means that it is possible to change the inclination of the block as required with respect to the handle axis in order to regulate the angle of the same with respect to the above spatula, according to the height of the worker in question. 
     The free end of said block in fact has a through hole whose axis is perpendicular to the longitudinal axis of the block; a pin being housed within said hole which rotates idly thanks to a common bearing. 
     The spatula is fixed securely at the bottom end of said idle pin, and consequently underneath the above parallelepiped block. It is evident that the spatula according to the invention can rotate to the left and to the right of the metal block that supports the same, utilizing the idle pin as pivoting point. 
     In order to explain the operating principle of the tool according the invention more clearly, it is sufficient to say that when the labourer holds the handle, he simply moves the tool alternatively and continuously to the left and to the right so that the spatula, thanks also to the resistance exercised against the same by the mass of fluid material, rotates with respect to the longitudinal axis of the parallelepiped block which supports it, thus tracing the semi-circular movements required to smooth down the fluid material correctly. 
    
    
     To more fully clarify the present invention, the description thereof continues with reference to the enclosed drawings which are intended for purposes of illustration and not in a limiting sense where FIG. 1 is an axonometric view of the tool according to the invention. 
    
    
     With reference to this drawing, this tool consists of a handle (1) at whose bottom end two adjacent metal brackets (2) featuring an end transversal hole, are fixed. 
     The pair of holes on said brackets (2) house a pin (3) which acts as a pivot for a parallelepiped metal block (4) placed in an intermediate position with respect to the brackets (2); the inclination of the block (4) with respect to the brackets (2) and therefore with respect to the handle (1) being adjustable by releasing and then tightening a regulation and fixing wing nut (3a). 
     The front end of said block (4) features a through hole which is perpendicular to the longitudinal axis of the block in which an idle rotating pin (5) is fitted thanks to the fact that a bearing is fitted between the same. 
     The bottom end of said rotating pin (5) is fixed at the centre of the upper face of a spatula (6) which can therefore rotate towards the left or the right integrally with said pin (5) with respect to the support block (4) and therefore with respect to the axis of the handle (1).