Flat wrench

Abstract

The present invention relates to a flat wrench that is formed by a central shaft (1) with end heads (2), wherein each head (2) comprises two parallel and substantially flat faces (21, 22) and a notch (3) with parallel sides (31, 32), with an opening (30) on the edge of the head (2). The key is characterised in that the sides (31, 32) of at least one notch (3) comprise a step (33) such that the distance between the sides (31, 32) of the notch (3) is different in the area that comes into contact with the faces (21, 22).

Description

[0001] DESCRIPTION

[0002] Flat wrench

[0003] OBJECT OF THE INVENTION

[0004] The invention, as the title of this descriptive document states, is an improved flat wrench that increases the utility of each tool by allowing the doubling of the sizes of nuts or bolts for which it is used. This innovation, within the framework of current techniques, offers advantages previously unknown.

[0005] The present invention has its field of application within the field of manufacturing and use of tools, in workshops, crafts...

[0006] STATE OF THE ART

[0007] In the trade, open-end wrenches are commonly used. These wrenches consist of a shaft with two heads, each with parallel notches and standard dimensions, often in inches. Each wrench is designed to tighten nuts, bolts, or similar fasteners of two different sizes. Therefore, it's necessary to have one wrench for every two standard sizes. However, in a workshop, it's common to need to tighten nuts of many different sizes, so a user might end up owning and carrying a large number of wrenches.

[0008] One way to solve this problem is with an adjustable open-end wrench, which allows you to vary the distance between the jaws of the notch. This solution is effective, but it requires more handling and reduces the tool's lifespan.

[0009] There is no known way to reduce that number of keys in a manner similar to the invention.

[0010] DESCRIPTION OF THE INVENTION

[0011] The present invention relates to a flat wrench that provides a notable innovation within its field of application, the characteristic details that make this possible being conveniently set forth in the accompanying final claims. The flat wrench consists of a central shaft with end heads. Each head comprises two substantially flat, parallel faces, such that the wrench is of the type called "flat." Each head also has a notch with parallel sides and an opening at the edge of the head. The invention lies in the fact that the sides of at least one notch comprise a step, such that the distance between the sides of the notch is different in the area of ​​contact with each of the faces.

[0012] For example, on one side of the same head the separation between sides corresponds to a distance of 2.5cm (one inch) and on the other side it corresponds to 2.25cm (0.9 inches).

[0013] Other ways of carrying out the invention are shown below.

[0014] EXPLANATION OF THE FIGURES

[0015] To complete the description being made and in order to help in the better understanding of the characteristics of the invention, a section of drawings is presented where, for illustrative and non-limiting purposes, the following have been represented.

[0016] Figure 1 corresponds to a schematic perspective view of an example of implementation.

[0017] PREFERRED EMBODIMENT OF THE INVENTION

[0018] The embodiment shown in Figure 1 is a flat wrench consisting of a central shank (1) with two end heads (2), each having two substantially flat faces (21, 22). Each head (2) has a through notch (3) between the two flat faces (21, 22) that is accessible to or reaches the edge of the head (2), forming an opening (30). Each notch (3) has two sides (31, 32) adjacent to the opening (30) that are opposite each other and substantially parallel. A step (33) is defined on these sides (31, 32), such that the distance between the sides (31, 32) of each notch (3) is different in the contact area with each face (21, 22).

[0019] To really optimize the advantage, the notches (3) on each head (2) have different dimensions, so that the flat wrench is applicable for four different standardized sizes.

Claims

CLAIMS 1- Flat key, formed by a central stem (1) with end heads (2), where each head (2) comprises two substantially flat parallel faces (21,22) and a notch (3) with parallel sides (31,32), with an opening (30) at the edge of the head (2), characterized in that the sides (31,32) of at least one notch (3) comprise a step (33), such that the distance between the sides (31,32) of the notch (3) is different in the area of ​​contact with the faces (21,22). 2- Flat wrench, according to claim 1, characterized in that it comprises two heads (2) and each notch (3) has a step (33).

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