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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2019/102237
Kind Code:
The subject of this invention is a multifunctional plastering arc for working on shape elements. It comprises a smoothing surface (1) with at least one attaching handle (4), where the smoothing surface (1) is made of a flexible and elastic material, and has a serrated edge (3) preferably on its longer edge. Furthermore, on the side opposite the work surface there are at least two fasteners (2) which are in mating connection with the handle fastener (5) and also serve as a flap for holding the tool with the fingers.

GAZDA, Zoltán (Dob utca 25. 1/8, Budapest, H-1074, HU)
Application Number:
Publication Date:
May 31, 2019
Filing Date:
October 03, 2018
Export Citation:
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GAZDA, Zoltán (Dob utca 25. 1/8, Budapest, H-1074, HU)
International Classes:
Foreign References:
Attorney, Agent or Firm:
KASZÁS, Eszter (Maros utca 28. 1. em. 4, Budapest, H-1122, HU)
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1. Multifunctional plastering arc for working on shape elements, consisting of a smoothing surface (1) and at least one attached handle (4), characterized by the smoothing surface (1) being made from a flexible and elastic material, with a serrated edge (3) preferably on its longer edge and at least two fasteners (2) on the side opposite of the work surface, which in mating connection with a handle fastener (5).

2. The multifunctional plastering arc in Claim 1, characterized by the handle (4) being made of a rigid material while the smoothing surface (1) is made of a flexible material.

3. The multifunctional plastering arc in Claim 1, characterized by its shape preferably being a rectangle.

4. The multifunctional plastering arc in Claim 1 , characterized by a hook (6) on the handle (4).

Multifunctional plastering arc for working on shape elements

The utility model is a plastering arc made of plastic with a flexible structure. Its flexibility makes it suitable for simple use in positive and negative arcs alike. One of the longer edges of the plastering tool is serrated to make it appropriate for various specific work processes as well.

Plastering is a very complicated procedure requiring fine movements, and not only expertise and experience, but above all adequate tools. A fundamental device for accurately carrying out the above tasks is the plastering hawk or trowel, which provide help for achieving a perfect and homogenous surface. Nearly all jobs must deal with the issue of arcs and other curved surfaces, which usually require the manufacture of unique-single-use tools, slowing down work and making the end-result less than perfect. The advantages of a curved or partly curved tool, or one with both curved and straight surfaces have been recognized in other areas as well, demonstrated by the device registered under No. US4688356 and described as a „HAND-OPERATED GRINDING OR POLISHING TOOL”, which, although designed for grinding and polishing, and not plastering, was a very inspiring tool in its own field with its curved shape. The description registered under No. US4669970 and titled„HAND TOOL FOR FINISHING CORNERS AND THE LIKE WITH A CEMENTOUS MATERIAL” also demonstrates an arced tool designed specifically for overcasting and plastering jobs. This device is primarily suitable for working on positive angles and arcs. One of its favourable implementation is larger version with two handles for larger arcs. Overall, the above inventions are useful for making work easier in their own respective fields, and contribute to a perfect result. We see their drawback in that professionals come across countless different shape elements in their work for which template-type tools are inadequate.

The subject of the invention is a plastering tool for curved surfaces, preferably made of plastic, which is suitable for working on positive and negative direction surfaces alike due to its flexible structure. The device is held by a special, rigid grip that allows the person to simply hold and work with the device at any angle. Moreover, it can be attached to a belt by its handle due to its practical design.

The advantage of the invention is that its unique, flexible design makes it handy for working on both positive and negative spatial shape elements, as opposed to traditional plastering trowels. Those are typically made of hard plastic or stainless steel, which does not allow bending, or if bent repeatedly, the material structure ages prematurely or its surface becomes damaged. Our invention, however, is flexible so that accurate workmanship on countless different shapes becomes possible, while its serrated edge makes the device multifunctional. The serrated edge makes the tool applicable for tiling and masonry jobs as well, and additional repair works will not require a separate device, either.

The handle in its preferable design lends help for working on negative arcs by ensuring that the gliding surface is held together. Despite the above, the device is still suitable for the jobs usually done by traditional tools, that is for perfect workmanship on smooth surfaces. Consequently, we can state that it is a versatile multifunctional tool that can be used for a number of purposes.

Our solution comes from recognizing that there are countless occasions in plastering when we need to work on unusual shape elements or forms, but in lack of an adequate tool, the result will not be as accurate as possible, and is done with ad hoc devices.

A further advantage of the device preferably made from plastic compared to traditional tools is that smoothing surfaces made of metal, or the more modem stainless steel, sooner or later lose their stainless quality due to damages to the surface, or the surface loses its perfect smoothness, while our device with its flexible smoothing surface withstands impact from regular use or transport. When cleaning or transporting traditionally shaped equipment, it is often inevitable that surface damages appear, affecting not only the tool but also the work at hand by causing marks and unevenness.

Our device with its soft and semi-hard structure, on the other hand, has a flexible reaction to exposure during transport. Due to its base material being mbber or soft plastic, or a combination of these materials, it is not subjected to rust or other weather-related harmful effect. The movement repeated countless times in plastering is putting plaster on the surface, which is preferably done with a dedicated tool, but our multifunctional tool with its flexible material, smooth surface and elasticity allows the measuring and application of even a small amount of plaster on the given surface. We can use the handle for working on smooth surfaces, but the device is easily operable without it as well, since a separate manual handling flap can be created on the back side of the device for holding it with the fingers.

Hereunder, we will describe a favourable design of the multifunctional plastering arc by using schematic diagrams. Diagram 1 : multifunctional plastering arc with hook

Diagram 2: multifunctional plastering arc

Diagrams 1 and 2 display a flexible plastering arc made of plastic, the main unit of which is the flexible and elastic smoothing surface 1 preferably made of plastic, with two fasteners 2 on the side opposite of the work surface for attaching the handle 4 designed for working on negative curve surfaces. Furthermore, the opposite fixing units that are the handle fasteners 5 are placed at either ends of the handle 4. Apart from plastering, the device is also suitable for other bricklaying and tiling jobs with its serrated edge 3 preferably created at one if its edges. In order to ensure maximum versatility, the handle 4 is also made of a material that allows flexibility, thereby working on negative shape elements and arcs does not cause any problems. Apart from the displayed usage, other implementations are also feasible for the shape of the smoothing surface 1 or the location of the serrated edge 3, as well as for the shape of the handle 4 according to requirements. As demonstrated in the two diagrams, Diagram 1 displays a supplementary 6 hook on the handle 4 for attaching the device to a person’s belt for instance.

Legend - scraper surface

- fastener

- serrated edge

- handle

- handle fastener

- hook