CA1097970A - Scabbler bits - Google Patents
Scabbler bitsInfo
- Publication number
- CA1097970A CA1097970A CA319,767A CA319767A CA1097970A CA 1097970 A CA1097970 A CA 1097970A CA 319767 A CA319767 A CA 319767A CA 1097970 A CA1097970 A CA 1097970A
- Authority
- CA
- Canada
- Prior art keywords
- tips
- scabbler
- pointed
- bits
- bit
- 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.)
- Expired
Links
- 238000007373 indentation Methods 0.000 abstract description 3
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
- B08B1/16—Rigid blades, e.g. scrapers; Flexible blades, e.g. wipers
- B08B1/165—Scrapers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/26—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by impact tools, e.g. by chisels or other tools having a cutting edge
- B28D1/265—Scabbling machines or scabbling tools
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
- Percussive Tools And Related Accessories (AREA)
Abstract
ABSTRACT
Title: Scabbler Bits A bit for a scabbler comprises pointed tips separated by chisel shaped cutting tips projecting a smaller distance than the pointed tips. The tips are preferably in straight rows ending in pointed tips. The tips may be of tungsten carbide and brazed into position. The pointed tips make indentations into the surface, and the chisel shaped tips the break the intermediate weakened area. The bits are used for abrading hard ground surfaces.
Title: Scabbler Bits A bit for a scabbler comprises pointed tips separated by chisel shaped cutting tips projecting a smaller distance than the pointed tips. The tips are preferably in straight rows ending in pointed tips. The tips may be of tungsten carbide and brazed into position. The pointed tips make indentations into the surface, and the chisel shaped tips the break the intermediate weakened area. The bits are used for abrading hard ground surfaces.
Description
~3~7~
TITLE: Scabbler Bits Description:
TECHNICAI. FIELD
The invention relates to bits for scabblers, that is percussive machines for roughening, abrading, or removiny projections from hard surfaces, for example walls or ground surfaces such as roads or concrete constructions.
BACKGROUND ART
Scabblers are known from Patent Specifications such as U.S. 2,553,435 of sriese, G.B. 709,904 of Metropolitan, and G.B. 1/056,011 of MacDonald, but these give little detail of scabbler bits. However, generally speaking, a scabbler bit comprises a head having a number of tips mounted thereon and means for attachment to a scabbler.
The tips may be of hard cutting material such as tungsten carbide and brazed into apertures in the head.
DISCLOSURE OF INVENTION
__ A scabbler bit according to the invention has a number of pointed tips separated by chisel shaped cutting -tips projecting from the head a smallerdistance than the pointed tips. In use, the pointed tips make indentations - in the surface under treatment, and the chisel shaped tips then break the area weakened between indentations, removing a large amount of material per unit of energy of impact.
~7~
TITLE: Scabbler Bits Description:
TECHNICAI. FIELD
The invention relates to bits for scabblers, that is percussive machines for roughening, abrading, or removiny projections from hard surfaces, for example walls or ground surfaces such as roads or concrete constructions.
BACKGROUND ART
Scabblers are known from Patent Specifications such as U.S. 2,553,435 of sriese, G.B. 709,904 of Metropolitan, and G.B. 1/056,011 of MacDonald, but these give little detail of scabbler bits. However, generally speaking, a scabbler bit comprises a head having a number of tips mounted thereon and means for attachment to a scabbler.
The tips may be of hard cutting material such as tungsten carbide and brazed into apertures in the head.
DISCLOSURE OF INVENTION
__ A scabbler bit according to the invention has a number of pointed tips separated by chisel shaped cutting -tips projecting from the head a smallerdistance than the pointed tips. In use, the pointed tips make indentations - in the surface under treatment, and the chisel shaped tips then break the area weakened between indentations, removing a large amount of material per unit of energy of impact.
~7~
-2-In a preferred arrangement, the tips are in straight rows, preferably parallel to each other, preferably with a pointed tip at the end of each row, and preferably with the pointed tips and chisel shaped tips in adjacent rows off-set with respect to each other. If the scabbler head is circular, the rows can well be along and~or parallel to a diameter of the head. The bit can be mounted on the scabbler so that the rows are transverse to the direction of advance of the scabbler ` in use.
;
The means for attachment of the scabbler bit to a scabbler may comprise a shank for reception in a cylinder of the scabbler, or a recess for a piston rod orshank projecting from -the cylinder. A taper may be provided between the piston rod end and the bit, the recess possibly comprising a tapered skirt optionally with a cross-hole for securing the rod.
BRIEF DESCRIPTION OF DRAWINGS
Figure 1 is a face view of a bit; and Figure 2 is a corresponding side elevation with the centre row of pointed tips and chisel-shaped tips in section.
BEST MODE OF CARRYING OUT THE INYENTION
The bit shown in the drawings comprises a head 1 of steel having five parallel transverse slots (shown in Figure 2 only) each with a number of tungsten caxbide pointed tips 2 and tungsten carbide chisel shaped tips
;
The means for attachment of the scabbler bit to a scabbler may comprise a shank for reception in a cylinder of the scabbler, or a recess for a piston rod orshank projecting from -the cylinder. A taper may be provided between the piston rod end and the bit, the recess possibly comprising a tapered skirt optionally with a cross-hole for securing the rod.
BRIEF DESCRIPTION OF DRAWINGS
Figure 1 is a face view of a bit; and Figure 2 is a corresponding side elevation with the centre row of pointed tips and chisel-shaped tips in section.
BEST MODE OF CARRYING OUT THE INYENTION
The bit shown in the drawings comprises a head 1 of steel having five parallel transverse slots (shown in Figure 2 only) each with a number of tungsten caxbide pointed tips 2 and tungsten carbide chisel shaped tips
3 brazed therein. The head 1 is provided with an integral shank 4 and a spiral circumferential groove 5 whereby the head 1 can be attached to a scabbler.
INDUSTRIAL 'APPL'ICAB'ILITY
. . ~ . . _ . . .
In use, the shank 4 enters an end of a cylinder (not shown) of a scabbler,-a coil spring (not shown) is engaged with one end in the groove 5, and th other end on the end of the cylinder, to retain the head in position. A piston slidable under motive fluid pressure in the cylinder strikes the free (left hand) end of the shank 4 and drives the head 1 against the surface under treatment,
INDUSTRIAL 'APPL'ICAB'ILITY
. . ~ . . _ . . .
In use, the shank 4 enters an end of a cylinder (not shown) of a scabbler,-a coil spring (not shown) is engaged with one end in the groove 5, and th other end on the end of the cylinder, to retain the head in position. A piston slidable under motive fluid pressure in the cylinder strikes the free (left hand) end of the shank 4 and drives the head 1 against the surface under treatment,
Claims (4)
1. A scabbler bit having a number of tips mounted thereon and means for attachment to a scabbler characterized by a number of pointed tips separated by chisel-shaped cutting tips projecting from the head a smaller distance than the pointed tips.
2. A scabbler bit according to claim 1, in which the tips are in straight rows.
3. A scabbler bit according to claim 2, in which there is a pointed tip at the end of each row.
4. A scabbler bit according to claim 1, with the pointed tips and chisel-shaped tips in adjacent rows off-set with respect to each other.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1040478 | 1978-03-16 | ||
| GB10404/78 | 1978-03-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1097970A true CA1097970A (en) | 1981-03-24 |
Family
ID=9967211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA319,767A Expired CA1097970A (en) | 1978-03-16 | 1979-01-17 | Scabbler bits |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0018362A1 (en) |
| JP (1) | JPS55500145A (en) |
| AU (1) | AU4480779A (en) |
| CA (1) | CA1097970A (en) |
| WO (1) | WO1979000771A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1980002704A1 (en) * | 1979-06-07 | 1980-12-11 | Joad Eng Ltd | Scabblers |
| US4451093A (en) * | 1980-12-10 | 1984-05-29 | Robert Perez | Tool for scarifying concrete |
| GB2351465B (en) * | 1999-08-02 | 2003-02-19 | James Kilpatrick | An attachment for a percussive tool |
| CN102275230A (en) * | 2010-06-11 | 2011-12-14 | 五冶集团上海有限公司 | Bushhammer used for chiseling concrete wall |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1626033A (en) * | 1924-01-07 | 1927-04-26 | Furst Carl | Bush-hammering machine |
| US2924871A (en) * | 1956-10-29 | 1960-02-16 | Jack H Brown | Impact tool with magnetic base |
| FR1160274A (en) * | 1956-11-14 | 1958-07-10 | Improvement in bush hammering, pitting and material leveling processes | |
| SE300782B (en) * | 1966-04-01 | 1968-05-06 | Atlas Copco Ab | |
| SE304738B (en) * | 1967-12-04 | 1968-10-07 | Atlas Copco Ab |
-
1979
- 1979-01-11 WO PCT/GB1979/000007 patent/WO1979000771A1/en unknown
- 1979-01-11 JP JP50021179A patent/JPS55500145A/ja active Pending
- 1979-01-17 CA CA319,767A patent/CA1097970A/en not_active Expired
- 1979-03-05 AU AU44807/79A patent/AU4480779A/en not_active Abandoned
- 1979-10-12 EP EP79900039A patent/EP0018362A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| AU4480779A (en) | 1979-09-20 |
| WO1979000771A1 (en) | 1979-10-04 |
| JPS55500145A (en) | 1980-03-21 |
| EP0018362A1 (en) | 1980-11-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |