US20090108041A1 - Breaker Tool - Google Patents

Breaker Tool Download PDF

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Publication number
US20090108041A1
US20090108041A1 US11/925,937 US92593707A US2009108041A1 US 20090108041 A1 US20090108041 A1 US 20090108041A1 US 92593707 A US92593707 A US 92593707A US 2009108041 A1 US2009108041 A1 US 2009108041A1
Authority
US
United States
Prior art keywords
breaking part
slit
breaker tool
grooves
type
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11/925,937
Inventor
Hyung-Rae JO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SEWOO METAL INDUSTRIAL Co Ltd
SEWOO METAL Ind Co Ltd
Original Assignee
SEWOO METAL Ind Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SEWOO METAL Ind Co Ltd filed Critical SEWOO METAL Ind Co Ltd
Priority to US11/925,937 priority Critical patent/US20090108041A1/en
Assigned to SEWOO METAL INDUSTRIAL CO., LTD. reassignment SEWOO METAL INDUSTRIAL CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: JO, HYUNG-RAE
Publication of US20090108041A1 publication Critical patent/US20090108041A1/en
Abandoned legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C27/00—Machines which completely free the mineral from the seam
    • E21C27/20—Mineral freed by means not involving slitting
    • E21C27/28—Mineral freed by means not involving slitting by percussive drills with breaking-down means, e.g. wedge-shaped tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/02—Percussive tool bits
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/96—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
    • E02F3/966—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements of hammer-type tools
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F5/00—Dredgers or soil-shifting machines for special purposes
    • E02F5/30—Auxiliary apparatus, e.g. for thawing, cracking, blowing-up, or other preparatory treatment of the soil
    • E02F5/305—Arrangements for breaking-up hard ground
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T225/00—Severing by tearing or breaking
    • Y10T225/30—Breaking or tearing apparatus
    • Y10T225/371—Movable breaking tool

Definitions

  • 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.
  • breaker tools are classified into a chisel type breaker tool 1 a, as shown in FIG. 1A , a blunt type breaker tool 1 b, as shown in FIG. 1B , a moil point type breaker tool 1 c, as shown in FIG. 1C , and a conical type breaker tool, as shown in FIG. 1D , according to the shape of a breaking part 3 a, 3 b, 3 c, 3 d.
  • the breaking part requires the highest durability.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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 .
  • a chisel type breaker tool More particularly, a chisel type breaker tool, a blunt type breaker tool, a moil point type breaker tool and a conical type breaker tool will be described in detail with reference to the attached drawings.
  • slit-grooves 20 are formed in respective corners of a chisel type breaking part 11 a.
  • Each slit-groove 20 extends from the lower end of a corresponding corner of the chisel type breaking part 11 a to a predetermined height h. Therefore, when the chisel type breaking part 11 a of the chisel type breaker tool 10 a, which has the four slit-grooves 20 , is heat-treated, as shown in FIG. 4A , the heat-treated surface area is increased, and the heat treatment depth P is also increased.
  • slit-grooves 20 are formed in the circumferential outer surface of a blunt type breaking part 11 b at positions spaced apart from each other at regular intervals.
  • Each slit-groove 20 extends from the lower edge of the breaking part 11 b to a predetermined height h. Therefore, when the blunt type breaking part 11 b of the blunt type breaker tool 10 b, which has the slit-grooves 20 , is heat-treated, as shown in FIG. 4B , the heat-treated surface area is increased, and the heat treatment depth P is also increased.
  • slit-grooves 20 are formed in respective corners of a moil point type breaking part 11 c.
  • Each slit-groove 20 extends from the lower end of a corresponding corner of the moil point type breaking part 11 c to a predetermined height h. Therefore, when the moil point type breaking part 11 c of the moil point type breaker tool 10 c, which has the four slit-grooves 20 , is heat-treated, as shown in FIG. 4A , the heat-treated surface area is increased, and the heat treatment depth P is also increased.
  • slit-grooves 20 are formed in the conical outer surface of a conical type breaking part 11 d at positions spaced apart from each other at regular intervals.
  • Each slit-groove 20 extends from the lower end of the conical outer surface of the breaking part 11 d to a predetermined height h. Therefore, when the conical type breaking part 11 d of the conical type breaker tool 10 d, which has the slit-grooves 20 , is heat-treated, as shown in FIG. 4D , the heat-treated surface area is increased, and the heat treatment depth P is also increased.
  • slit-grooves are formed in the outer surface of a breaking part of the breaker tool, when it is heat-treated, the heat treatment depth is increased. Therefore, the lift time of the breaker tool is increased, and the breaking performance thereof is enhanced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Percussive Tools And Related Accessories (AREA)

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.

Description

    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 1 a, as shown in FIG. 1A, a blunt type breaker tool 1 b, as shown in FIG. 1B, a moil point type breaker tool 1 c, as shown in FIG. 1C, and a conical type breaker tool, as shown in FIG. 1D, according to the shape of a breaking part 3 a, 3 b, 3 c, 3 d. 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
  • Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the drawings attached hereinafter, wherein like reference numerals refer to like elements throughout. The embodiments are described below so as to explain the present invention by referring to the figures.
  • More particularly, a chisel type breaker tool, a blunt type breaker tool, a moil point type breaker tool and a conical type breaker tool will be described in detail with reference to the attached drawings.
  • In the case of the chisel type breaker tool 10 a, shown in FIG. 3A as an example, slit-grooves 20 are formed in respective corners of a chisel type breaking part 11 a. Each slit-groove 20 extends from the lower end of a corresponding corner of the chisel type breaking part 11 a to a predetermined height h. Therefore, when the chisel type breaking part 11 a of the chisel type breaker tool 10 a, which has the four slit-grooves 20, is heat-treated, as shown in FIG. 4A, the heat-treated surface area is increased, and the heat treatment depth P is also increased.
  • In the case of the blunt type breaker tool 10 b shown in FIG. 3B as an example, slit-grooves 20 are formed in the circumferential outer surface of a blunt type breaking part 11 b at positions spaced apart from each other at regular intervals. Each slit-groove 20 extends from the lower edge of the breaking part 11 b to a predetermined height h. Therefore, when the blunt type breaking part 11 b of the blunt type breaker tool 10 b, which has the slit-grooves 20, is heat-treated, as shown in FIG. 4B, the heat-treated surface area is increased, and the heat treatment depth P is also increased.
  • In the case of the moil point type breaker tool 10 c shown in FIG. 3C as an example, slit-grooves 20 are formed in respective corners of a moil point type breaking part 11 c. Each slit-groove 20 extends from the lower end of a corresponding corner of the moil point type breaking part 11 c to a predetermined height h. Therefore, when the moil point type breaking part 11 c of the moil point type breaker tool 10 c, which has the four slit-grooves 20, is heat-treated, as shown in FIG. 4A, the heat-treated surface area is increased, and the heat treatment depth P is also increased.
  • In the case of the conical type breaker tool 10 d shown in FIG. 3D as an example, slit-grooves 20 are formed in the conical outer surface of a conical type breaking part 11 d at positions spaced apart from each other at regular intervals. Each slit-groove 20 extends from the lower end of the conical outer surface of the breaking part 11 d to a predetermined height h. Therefore, when the conical type breaking part 11 d of the conical type breaker tool 10 d, which has the slit-grooves 20, is heat-treated, as shown in FIG. 4D, the heat-treated surface area is increased, and the heat treatment depth P is also increased.
  • As described above, in breaker tools according to preferred embodiments of the present invention, because slit-grooves are formed in the outer surface of a breaking part of the breaker tool, when it is heat-treated, the heat treatment depth is increased. Therefore, the lift time of the breaker tool is increased, and the breaking performance thereof is enhanced.
  • Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Claims (5)

1. A breaker tool comprising a plurality of slit-grooves formed around a breaking part thereof, each of the plurality of slit-grooves vertically extending in a predetermined length from a position higher than the bottom end of the breaking part.
2. The breaker tool as set forth in claim 1, wherein the breaking part comprises a chisel type breaking part, and the slit-grooves are formed in respective corners of the chisel type breaking part, each of the slit-grooves.
3. The breaker tool as set forth in claim 1, wherein the breaking part comprises a blunt type breaking part, and the slit-grooves are formed in the circumferential outer surface of the blunt type breaking part at positions spaced apart from each other at regular intervals.
4. The breaker tool as set forth in claim 1, wherein the breaking part comprises a moil point type breaking part, and the slit-grooves are formed in respective corners of the moil point type breaking part.
5. The breaker tool as set forth in claim 1, wherein the breaking part comprises a conical type breaking part, and the slit-grooves are formed in a circumferential outer surface of the conical type breaking part at positions spaced apart from each other at regular intervals.
US11/925,937 2007-10-27 2007-10-27 Breaker Tool Abandoned US20090108041A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/925,937 US20090108041A1 (en) 2007-10-27 2007-10-27 Breaker Tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/925,937 US20090108041A1 (en) 2007-10-27 2007-10-27 Breaker Tool

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US20090108041A1 true US20090108041A1 (en) 2009-04-30

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US11/925,937 Abandoned US20090108041A1 (en) 2007-10-27 2007-10-27 Breaker Tool

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110219613A1 (en) * 2010-03-10 2011-09-15 Suzuki Motor Corporation Connecting rod fracture splitting apparatus and fracture splitting method
CN102493515A (en) * 2011-12-15 2012-06-13 湖南科技大学 Structure of hydraulic breaker drill rod, and method for embedding alloy drill bit of hydraulic breaker drill rod

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3866306A (en) * 1973-01-30 1975-02-18 Asea Ab Method of hydrostatically extruding compound material and compound billets
US5489102A (en) * 1995-05-08 1996-02-06 Hawkins; John P. Arrow point for small game
US6000477A (en) * 1993-07-10 1999-12-14 Barry Campling Apparatus for applying additional momentum

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3866306A (en) * 1973-01-30 1975-02-18 Asea Ab Method of hydrostatically extruding compound material and compound billets
US6000477A (en) * 1993-07-10 1999-12-14 Barry Campling Apparatus for applying additional momentum
US5489102A (en) * 1995-05-08 1996-02-06 Hawkins; John P. Arrow point for small game

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110219613A1 (en) * 2010-03-10 2011-09-15 Suzuki Motor Corporation Connecting rod fracture splitting apparatus and fracture splitting method
US8657171B2 (en) * 2010-03-10 2014-02-25 Suzuki Motor Corporation Connecting rod fracture splitting apparatus and fracture splitting method
CN102493515A (en) * 2011-12-15 2012-06-13 湖南科技大学 Structure of hydraulic breaker drill rod, and method for embedding alloy drill bit of hydraulic breaker drill rod

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SEWOO METAL INDUSTRIAL CO., LTD., KOREA, REPUBLIC

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:JO, HYUNG-RAE;REEL/FRAME:020025/0383

Effective date: 20071022

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION