FR2553326A1 - Improved socket spanner - Google Patents

Abstract

The subject of the invention relates to the technical field of hand tools. This spanner comprises at least on its small arm, between the socket interacting with the element to be tightened and its bent part, a zone which is arranged to allow the engagement and holding of a complementary element capable of being advantageously disposed in the prolongation opposite the long arm of the spanner, allowing, by a simultaneous grasping by the operator of the body of the spanner and of the complementary element, a homogeneous distribution of force in order to provide a tightening torque. The invention applies principally to bent spanners.

Description

 The invention relates to an improved pipe wrench.

 The invention relates to the technical sector of hand tools.

 Pipe wrenches have long been used to tighten nuts and the like, these wrenches may or may not be uncorked. The long part of these wrenches forms a lever and grip arm and allows a more efficient tightening of the nut, without increasing this tightening. It frequently happens to introduce a rod or bar into the end sleeve of the long arm. However, it has been found that the key has not kept well following this action, thereby reducing and limiting the desired effect.

 This goal was therefore to improve this effect by a better distribution of the force in order to exert a tightening torque.

 According to a first characteristic of the invention, the pipe wrench is remarkable in that it comprises on its small arm between the socket cooperating with the element to be clamped and its bent part, a fitted area allowing engagement and taking of an additional element which can advantageously be in the extension opposite to the long arm of the key, ensuring by a simultaneous gripping of the operator, a homogeneous distribution of the force to ensure the tightening torque.

 These characteristics and others will emerge clearly from the following description.

To fix the object of the invention to the figures of the drawing an
s attached or:
Figure 1 is a front view with partial section of a pipe wrench produced according to the invention, the key having a smooth socket.

 Figure 2 is a partial view according to Figure 1, the sleeve being polygonal.

 Figure 3 is a view along line III-III of Figure 1.

 Figure 4 is an alternative view of the key having two flats.

 Figure 5 is a sectional view along line V-W in Figure 4.

 Figure 6 is an alternative view of the key having 4 flats.

 Figure 7 is a top view of an uncapped pipe wrench with an interior recess established in polygonal form.

 In order to make the object of the invention more concrete, it is now described in a nonlimiting manner illustrated in the figures of the drawing.

The improved pipe wrench conventionally comprises a straight gripping body (1) with at its end a first sleeve (2), the other end being extended in an angled form (3) with a second sleeve (4). Between this bushing (4) which can be smooth or polygonal (figures - 2) are provided zones forming at least two flats (5) (figures 4-5) opposite allowing the engagement of the fork-shaped head of a flat key for example. The flats are advantageously arranged along the longitudinal axis of the key body (1) so that the flat key (c) used in addition is an extension of said body,
It is thus possible to exert a regularly distributed effort. As a variant as illustrated in Figures (3-6) of the drawing. several successive flats are provided on the periphery of the zone adjacent to the socket, for example to give a square shape. hexagonal, octagonal and the like.

 The socket can be smooth, or square. In the case of so-called open-ended pipe wrenches, provision is made in addition to make an opening (6) crossing the bent part with at least two flats and preferably a polygonal shape (7) allowing the engagement of a male end fitting complementary forms. It is also obvious that the profiled zone with several flats can be produced near each end socket of the keys. This area also contributes to the strengthening of the bent part of the pipe wrenches.

 The improved key is a new functional product characterized by the additional advantages it provides.

Claims (3)

- 1 - Improved pipe wrench characterized in that it comprises at least on its small arm between the socket cooperating with the element to be clamped and its bent part, a fitted area allowing the engagement and taking of an additional element capable of 'advantageously being arranged in the extension opposite to the long arm of the key, allowing by a simultaneous gripping of the operator the key body and the complementary element a homogeneous distribution of the force to ensure a tightening torque. - 2 - Key according to claim 1, characterized in that said zone comprises at least two opposite flats. - 3 - Key according to claim 1, characterized in that said zone comprises on its periphery a plurality of successive flats defining a polygonal shape - 4 - Key according to claim 1, characterized in that the socket is smooth. - 5 - Key according to claim 1, characterized in that the socket is polygonal. - 6 - Pipe wrench called uncorked according to claim 1, characterized in that the opening made in the elbow of the key has a polygonal shape.