Breaker tool

Abstract: Disclosed herein is a breaker tool, which is provided in breakers or excavators to break materials, such as rocks, hard soil, etc. In the breaker tool of the present invention, slit-grooves are formed around a breaking part, and each slit-groove extends from the breaking part a predetermined height. (end of abstract)

Breaker tool description/claims

Brief Patent Description

Full Patent Description

Patent Application Claims

TECHNICAL FIELD

The present invention relates generally to a breaker tool provided in breakers or excavators to break materials such as rocks, hard soil, etc., and, more particularly, to a breaker tool which comprises slit-grooves around a breaking part thereof.

BACKGROUND ART

Generally, breaker tools are classified into a chisel type breaker tool 1a, as shown in FIG. 1A, a blunt type breaker tool 1b, as shown in FIG. 1B, a moil point type breaker tool 1c, as shown in FIG. 1C, and a conical type breaker tool, as shown in FIG. 1D, according to the shape of a breaking part 3a, 3b, 3c, 3d. In such breaker tools, the breaking part requires the highest durability. Furthermore, the breaking part is worn by direct contact with a material such as rock so that the end thereof becomes blunt with the passage of time. Therefore, typically, the breaking part is made by heat-treating SCM440 alloy steel, mixed with a small amount of nickel (Ni), chrome (Cr) and molybdenum (Mo), to increase the strength thereof.

However, in the case where the breaking part of the breaker tool is heat-treated using a conventional technique, as shown in FIG. 2A through 2D, because the depth to which the breaking part is heat-treated is relatively shallow, there is a disadvantage in that the breaking part is easily worn.

The information disclosed in this Background Art section is only for enhancement of understanding of the background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is already known to a person skilled in the art.

SUMMARY OF THE INVENTION

Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a breaker tool, which has slit-grooves around a breaking part thereof, so that, when the breaking part is heat-treated, the heat treatment depth is increased, thus extending the lifetime of the breaker tool and enhancing the breaking performance thereof.

In order to accomplish the above object, one aspect of the present invention provides a breaker tool comprising a plurality of slit-grooves formed around a breaking part thereof, each of the plurality of slit-grooves extending a predetermined height from the breaking part.

Other aspects of the invention are discussed infra.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects, features and advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

FIGS. 1A through 1D are perspective views respectively illustrating a chisel type breaker tool, a blunt type breaker tool, a moil point type breaker tool and a conical type breaker tool, according to conventional techniques;

FIGS. 2A through 2D are sectional views taken along the respective lines A-A, B-B, C-C and D-D of FIGS. 1A through 1D;

FIGS. 3A through 3D are perspective views respectively illustrating a chisel type breaker tool, a blunt type breaker tool, a moil point type breaker tool and a conical type breaker tool, according to preferred embodiments of the present invention; and

FIGS. 4A through 4D are sectional views taken along the respective lines e-e, f-f, g-g and h-h of FIGS. 3A through 3D.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

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Industry Class:
Severing by tearing or breaking

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