GB2099354A - Hammers - Google Patents

Abstract

A slag chipping hammer, used to chip away fused slag resulting from the welding together of two metal components, has each of the ends of its head (11) provided with an axial recess in the form of a tapped socket (12) securely accommodating a threaded shank (15) of material proof against the conducting of sound and embedding the tail end of a chipping tool. A series of chipping tools are provided to be used, one at a time, in each socket. Each tool bit is in the form of one or more pins (18), the heads of which are blunt or sloped. A metal washer abuts the inner end or ends of the pin or pins respectively. <IMAGE>

Description

SPECIFICATION Slag chipping hammer This invention relates to a slag chipping hammer which is used to chip away fused slag resulting from the welding together of two metal components.

Chipping hammers proposed heretofore for chipping away such fused slag have been of an all metal construction and the dicibel count of the noise-level created in a welding shop, due to the constant chipping of fused slag away from the welds, is normally in excess of the maximum permissible under Safety Regulations for a working environment.

It is an object of the present invention to provide a slag chipping hammer having at least the same benefits of existing hammers but in which the resonance resulting from striking the metal article by the hammer is decreased, thereby reducing the decibel count.

According to the present invention, each of the ends of the head of a slag chipping hammer has an axial recess securely accommodating a shank of material proof against the conductance of sound and embedding the tail ends of a chipping tool.

Preferably, the recess is a tapped socket and the shank is threaded.

Preferably also, a series of chipping tools are provided, any one of which may be selected to be located in a socket, each tool bit being in the form of one pin, or two or more pins grouped together. The heads of the pins may be blunt or pointed. Each tool preferably is provided with an impact metal washer abutting the inner end or ends of said pin or pins respectively.

An embodiment of the present invention will now be described, by way of example, with reference to the accompanying drawing, in which: Figure 1 illustrates a side view of a hammer according to the present invention; and Figures 2 and 3 illustrate respectively exploded side views of two chipping tools shown in Figure 1.

Referring to the drawing, a slag chipping hammer comprises a shaft 10 formed of tubular metal, tubular plastic material or on metal, plastics or wooden rod, and a head 11 of metal or plastics material. Each of the ends of the head 11 has an axial recess securely accommodating a shank 15 of a chipping tool 13. The recess is a tapped socket 12. A plurality of tools 13 are provided, each comprising a body 14 having a shank 15 with an external screwthread to mate with the threads of a socket 12. The body 14 is formed of material proof against the conductance of sound, such as plastics material, and having embedded therein the tail end of a tool bit comprising a pin 18 or two or more pins 18 grouped together. The inner end or ends of the pin or pins 18 respectively bears against an impact washer 16 to ansorb, and increase the area of impact, on the inner end of the shank 15 as shown.The pin or pins 18 are of hardened steel, and the pins of the group of pins 18 are parallelly abutting as shown. The pin or pins 18 can have different shaped outer ends i.e. the outer ends may be blunt having a flat end as shown in Figures 1 and 2 of a domed end or they may be pointed or sloped as shown in Figures 1 and 3. A hand grip of, for example, rubber, wood or plastics material is provided on the shaft 10.

For use, any two tools from the plurality are selected and fitted to the head 11 by being screwed into the sockets 12. The hammer can then be used to chip fused slag from the welded components. The selection of which tools to use depend on the type of weld and the amounts of fused slag to be chipped away.

In a modification, the body 14 may be of metal having a layer of material proof against the conductance of sound provided over those parts of the body 14 to be in contact with the head 11: in this modification no impact washers are required.

The plastics material referred to hereabove is preferably of high impact plastics material, for example, high impact nylon.

The above-described hammer is advantageous over existing hammers since its purpose is to reduce noise levels during removal of fused slag after welding by channelling the noise along the pin or pins and the noise being absorbed or deadened by the use of material proof against conductance of sound.

1. Aslag chipping hammer in which each of the ends of the head of the hammer has an axial recess securely accommodating a shank of material proof against the conductance of sound and embedding the tail end of a chipping tool.

2. A hammer as claimed in Claim 1, wherein the recess is a tapped socket and the shank is threaded.

3. A hammer as claimed in Claim 2, wherein a series of chipping tools are provided, any one of which may be selected to be located in a socket, each tool a bit in the form of one pin, or two or more pins grouped together.

4. A hammer as claimed in Claim 3, wherein the heads of the pins are blunt, domed, sloped or pointed.

5. A hammer as claimed in Claim 3 or 4, wherein each tool is provided with an impact metal washer abutting the inner end or ends of said pin or pins respectively.

6. A hammer substantially as hereinbefore described with reference to the accompanying drawings.

**WARNING** end of DESC field may overlap start of CLMS **.

Claims (6)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Slag chipping hammer This invention relates to a slag chipping hammer which is used to chip away fused slag resulting from the welding together of two metal components. Chipping hammers proposed heretofore for chipping away such fused slag have been of an all metal construction and the dicibel count of the noise-level created in a welding shop, due to the constant chipping of fused slag away from the welds, is normally in excess of the maximum permissible under Safety Regulations for a working environment. It is an object of the present invention to provide a slag chipping hammer having at least the same benefits of existing hammers but in which the resonance resulting from striking the metal article by the hammer is decreased, thereby reducing the decibel count. According to the present invention, each of the ends of the head of a slag chipping hammer has an axial recess securely accommodating a shank of material proof against the conductance of sound and embedding the tail ends of a chipping tool. Preferably, the recess is a tapped socket and the shank is threaded. Preferably also, a series of chipping tools are provided, any one of which may be selected to be located in a socket, each tool bit being in the form of one pin, or two or more pins grouped together. The heads of the pins may be blunt or pointed. Each tool preferably is provided with an impact metal washer abutting the inner end or ends of said pin or pins respectively. An embodiment of the present invention will now be described, by way of example, with reference to the accompanying drawing, in which: Figure 1 illustrates a side view of a hammer according to the present invention; and Figures 2 and 3 illustrate respectively exploded side views of two chipping tools shown in Figure 1. Referring to the drawing, a slag chipping hammer comprises a shaft 10 formed of tubular metal, tubular plastic material or on metal, plastics or wooden rod, and a head 11 of metal or plastics material. Each of the ends of the head 11 has an axial recess securely accommodating a shank 15 of a chipping tool 13. The recess is a tapped socket 12. A plurality of tools 13 are provided, each comprising a body 14 having a shank 15 with an external screwthread to mate with the threads of a socket 12. The body 14 is formed of material proof against the conductance of sound, such as plastics material, and having embedded therein the tail end of a tool bit comprising a pin 18 or two or more pins 18 grouped together. The inner end or ends of the pin or pins 18 respectively bears against an impact washer 16 to ansorb, and increase the area of impact, on the inner end of the shank 15 as shown.The pin or pins 18 are of hardened steel, and the pins of the group of pins 18 are parallelly abutting as shown. The pin or pins 18 can have different shaped outer ends i.e. the outer ends may be blunt having a flat end as shown in Figures 1 and 2 of a domed end or they may be pointed or sloped as shown in Figures 1 and 3. A hand grip of, for example, rubber, wood or plastics material is provided on the shaft 10. For use, any two tools from the plurality are selected and fitted to the head 11 by being screwed into the sockets 12. The hammer can then be used to chip fused slag from the welded components. The selection of which tools to use depend on the type of weld and the amounts of fused slag to be chipped away. In a modification, the body 14 may be of metal having a layer of material proof against the conductance of sound provided over those parts of the body 14 to be in contact with the head 11: in this modification no impact washers are required. The plastics material referred to hereabove is preferably of high impact plastics material, for example, high impact nylon. The above-described hammer is advantageous over existing hammers since its purpose is to reduce noise levels during removal of fused slag after welding by channelling the noise along the pin or pins and the noise being absorbed or deadened by the use of material proof against conductance of sound. CLAIMS

1. Aslag chipping hammer in which each of the ends of the head of the hammer has an axial recess securely accommodating a shank of material proof against the conductance of sound and embedding the tail end of a chipping tool.

2. A hammer as claimed in Claim 1, wherein the recess is a tapped socket and the shank is threaded.

3. A hammer as claimed in Claim 2, wherein a series of chipping tools are provided, any one of which may be selected to be located in a socket, each tool a bit in the form of one pin, or two or more pins grouped together.

4. A hammer as claimed in Claim 3, wherein the heads of the pins are blunt, domed, sloped or pointed.

5. A hammer as claimed in Claim 3 or 4, wherein each tool is provided with an impact metal washer abutting the inner end or ends of said pin or pins respectively.

6. A hammer substantially as hereinbefore described with reference to the accompanying drawings.