EP0018362A1 - Scabbler bits - Google Patents

Scabbler bits

Info

Publication number
EP0018362A1
EP0018362A1 EP79900039A EP79900039A EP0018362A1 EP 0018362 A1 EP0018362 A1 EP 0018362A1 EP 79900039 A EP79900039 A EP 79900039A EP 79900039 A EP79900039 A EP 79900039A EP 0018362 A1 EP0018362 A1 EP 0018362A1
Authority
EP
European Patent Office
Prior art keywords
scabbier
tips
pointed
bit
shaped ends
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.)
Withdrawn
Application number
EP79900039A
Other languages
German (de)
English (en)
French (fr)
Inventor
Jim Furby
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.)
JOAD ENGINEERING Ltd
Original Assignee
JOAD ENGINEERING 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 JOAD ENGINEERING Ltd filed Critical JOAD ENGINEERING Ltd
Publication of EP0018362A1 publication Critical patent/EP0018362A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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

Definitions

  • the invention relates to bits for scabblers, that is percussive machines for roughening, abrading, or removing projections from hard surfaces, for example walls or ground surfaces such as roads or concrete constructions.
  • a scabbier bit comprises a head having a number of tips mounted thereon and means for attachment to a scabbier.
  • the tips may be of hard cutting material such as tungsten carbide and brazed into apertures in the head.
  • a scabbier 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.
  • 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.
  • the tips are in straight rows, preferably parallel to each other, preferably wi 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 scabbier 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 scabbier so that the rows ar transverse to the direction of advance of the scabbier
  • the means for attachment of the scabbier bit to a scabbier may comprise a shank for reception in a cylinder of the scabbier, or a recess for a piston rod orshank projecting from the cylinder.
  • a taper may be 15 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.
  • Figure 1 is a face view of a bit? and 0 .
  • Figure 2 is a corresponding side elevation with the centre row of pointed tips and chisel-shaped tips in section.
  • the bit shown in the drawings comprises a head 1 of " 5 steel having five parallel transverse slots (shown in
  • 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 scabbier.
  • the shank 4 enters an end of a cylinder (not shown) of a scabbier, a coil spring (not shown) is engaged with one end in the groove 5, and'the 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
EP79900039A 1978-03-16 1979-10-12 Scabbler bits Withdrawn EP0018362A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1040478 1978-03-16
GB1040478 1978-03-16

Publications (1)

Publication Number Publication Date
EP0018362A1 true EP0018362A1 (en) 1980-11-12

Family

ID=9967211

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79900039A Withdrawn EP0018362A1 (en) 1978-03-16 1979-10-12 Scabbler bits

Country Status (5)

Country Link
EP (1) EP0018362A1 (enExample)
JP (1) JPS55500145A (enExample)
AU (1) AU4480779A (enExample)
CA (1) CA1097970A (enExample)
WO (1) WO1979000771A1 (enExample)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
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 (zh) * 2010-06-11 2011-12-14 五冶集团上海有限公司 用于凿毛砼面的凿毛锤

Family Cites Families (5)

* Cited by examiner, † Cited by third party
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 (fr) * 1956-11-14 1958-07-10 Amélioration aux procédés de bouchardage, de piquage et d'égalisation des matériaux
SE300782B (enExample) * 1966-04-01 1968-05-06 Atlas Copco Ab
SE304738B (enExample) * 1967-12-04 1968-10-07 Atlas Copco Ab

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO7900771A1 *

Also Published As

Publication number Publication date
AU4480779A (en) 1979-09-20
CA1097970A (en) 1981-03-24
JPS55500145A (enExample) 1980-03-21
WO1979000771A1 (en) 1979-10-04

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB SE

17P Request for examination filed

Effective date: 19800514

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19820809

RIN1 Information on inventor provided before grant (corrected)

Inventor name: FURBY, JIM