FI68941C - BRYTJAERN - Google Patents

Description

68941

Murtokanki

The present invention relates to a fracture rod consisting of a fracture tip and an elongate shaft with handles, in which the tip is forged or similarly made into a steel part made by plastic deformation and fixed to an arm formed by a tubular profile of a lighter material.

Known breaking bars of this type are forged from steel in order to be able to absorb stresses during use, which is why they are necessarily relatively heavy. They are therefore difficult to transport to and from work.

The object of the present invention is to provide a breaking bar which does not have the above-mentioned drawback.

For this purpose, the breaking bar according to the invention has obtained the design shown in principle in the characterizing part of claim 1.

The invention will be explained in more detail below with reference to the accompanying drawing.

Figure 1 is a top perspective view of an embodiment of a breaking bar according to the invention.

Figure 2 is a perspective view of the breaking bar of Figure 1 as seen from behind and the handle end.

Figure 3 is a side view of the fracture bar of Figures 1 and 2.

The breaking rod illustrated by way of example of the invention has a tip generally indicated by the number 10 and an elongate arm, generally indicated by the number 11, the outer end of which has a handle 12. In the present case, the arm 11 is pivotally mounted on a hook 13 not shown in the drawing. for attaching the lifting hook.

2,68941

According to the invention, the tip 10 is made forged or similarly made by plastic deformation into a steel part 14 comprising a flat blade part 14 with teeth 15 at the outer end and which through the support shoulder 16 becomes a substantially round or tubular fastening head 17. forms an arm 11 and may be, for example, a light metal such as extruded aluminum. The arm at the handle end may be bent at a suitable angle, as shown by the bend 19, so that the tubular cylindrical handle 20 has an ergonomically correct angle of inclination with respect to the blade-like tip 14. The rear or underside of the tip 10 has reinforcing strips 21 and 22 running along the edges at the transition point between the blade part 14 and the fastening part 17, which makes the tip slightly cup-shaped in this part, as is particularly clear in Figure 2. This makes the tip 10 very resistant to deformation. made of a relatively thin-walled material and is therefore not closed.

It is obviously clear that the fracture bar according to the invention, due to the described design, has a much lower weight than the fracture bar, which is made entirely by forging and thus also has a steel shaft. Despite its lower weight, the breaking bar according to the invention has the same strength as conventional breaking bars. It should also be clear that the breaking bar according to the invention is considerably cheaper to manufacture than conventional breaking bars, since only the tip part 10 is made by forging.

Several modifications and alterations of detail may be made within the spirit of the invention.