EP0020346A1 - Pounder units - Google Patents

Pounder units

Info

Publication number
EP0020346A1
EP0020346A1 EP19790900676 EP79900676A EP0020346A1 EP 0020346 A1 EP0020346 A1 EP 0020346A1 EP 19790900676 EP19790900676 EP 19790900676 EP 79900676 A EP79900676 A EP 79900676A EP 0020346 A1 EP0020346 A1 EP 0020346A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
pounder
tool
frame
piston
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Withdrawn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
EP19790900676
Other languages
German (de)
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 EP0020346A1 publication Critical patent/EP0020346A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B25D17/28—Supports; Devices for holding power-driven percussive tools in working position
    • 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

Definitions

  • the invention relates to pounder units for attachment to pounders or scabblers for roughening, abrading or removing projections from hard ground surfaces.
  • the invention provides a pounder unit comprising a frame, a single cylinder mounted upon or within the frame, a tool removably inserted into an end of the cylinder, a piston completely received in the cylinder and reciprocable under motive fluid pressure therein for striking the tool, means for fastening the frame to a pounder, and a valve for admitting motive fluid to the cylinder.
  • the frame comprises a single casting, and the fastening means bolt holes whereby the unit may be attached to the front surface of a pounder or scabbier.
  • the unit can be made to project from the pounder itself, and thus to extend into corners of the surface under treatment which cannot be reached by the tools of the pounder itself.
  • Figure 1 is a top plan of a unit according to the invention
  • Figure 2 is a section YY of Figure 1 omitting the cylinder, tool and piston for clarity;
  • Figure 3 is a section ZZ of Figure 1;
  • Figure 4 is a truncated section through a cylinder, showing the tool and piston as ' used in the above Figure ⁇ BEST MODE OF CARRYING OUT THE INVENTION
  • the unit comprises a single frame casting 20 having a single cylinder 26 ( Figure 4) mounted therein by means of a bolt 28.
  • a tool 6 is removably inserted into a (lower)
  • Bolt holes 22 ( Figure 2) comprise means for fastening the casting 20 to a pounder (not shown) .
  • __ valve 24 is provided for admitting motive fluid to the cylinder 26.
  • An air inlet 10 admits motive fluid into a passage 12 i the casting 20.
  • venturi tube (not shown) below 2o which is a blocked drill hole and above which is a filter 16 through which oil seeps from a reservoir 17.
  • Replenishment of the .oil in the reservoir 17 is effect through an inlet 19.
  • a pressure equalization tube 13 exten _>ds from the inlet end of the passage 12 up into t
  • the control valve assembly 24 is a conventional clack valve for supplying the motive air alternately to opposite working faces of a piston to cause the piston to reciprocate.
  • the cylinder 26 is inserted downwardly into the frame casting 20, the control valve assembly 24 inserted over it, and the whole retained in position by o the top plate (not shown) .
  • the stem 37 is slidably received in a bush 38 in the cylinder 26, and the tool 6 is retained in the cylinder by means of a beehive spring (not show engaging annular grooves 40 and 41 in the cylinder 26 and the tool 6 respectively.
  • the tools 6 can eas be removed from the cylinders 26, for example for replacement when tungsten carbide teeth 42 thereon become worn.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Percussive Tools And Related Accessories (AREA)

Abstract

Un pilon est fixe a un appareil a pilonner ou a smiller des surfaces en pierres dures, c'est-a-dire pour dresser la pierre ou autre surface d'un materiau semblable par percussion. Le pilon comprend un chassis, un cylindre simple, et un outil (6) introduit de maniere amovible dans le cylindre. Un piston est recu completement dans le cylindre et possede un mouvement alternatif pour percuter l'outil. Des moyens sont prevus pour attacher le chassis a un appareil a pilonner. Le pilon peut etre fixe dans une position lui permettant d'atteindre des recoins de la surface a traiter qui seraient autrement inaccessibles.A pestle is attached to a device for pounding or smelling hard stone surfaces, that is, for dressing stone or other surface of a similar material by percussion. The pestle comprises a frame, a simple cylinder, and a tool (6) removably inserted into the cylinder. A piston is completely received in the cylinder and has a reciprocating movement to strike the tool. Means are provided for attaching the chassis to a pounding device. The pestle can be fixed in a position allowing it to reach corners of the surface to be treated which would otherwise be inaccessible.

Description

TIT E
POUNDER UNITS
DESCRIPTION
TECHNICAL FIELD
The invention relates to pounder units for attachment to pounders or scabblers for roughening, abrading or removing projections from hard ground surfaces.
DISCLOSURE OF THE INVENTION
The invention provides a pounder unit comprising a frame, a single cylinder mounted upon or within the frame, a tool removably inserted into an end of the cylinder, a piston completely received in the cylinder and reciprocable under motive fluid pressure therein for striking the tool, means for fastening the frame to a pounder, and a valve for admitting motive fluid to the cylinder.
Preferably, the frame comprises a single casting, and the fastening means bolt holes whereby the unit may be attached to the front surface of a pounder or scabbier. Thus the unit can be made to project from the pounder itself, and thus to extend into corners of the surface under treatment which cannot be reached by the tools of the pounder itself.
DRAWINGS
Figure 1 is a top plan of a unit according to the invention; Figure 2 is a section YY of Figure 1 omitting the cylinder, tool and piston for clarity;
Figure 3 is a section ZZ of Figure 1; and
Figure 4 is a truncated section through a cylinder, showing the tool and piston as' used in the above Figure ■ BEST MODE OF CARRYING OUT THE INVENTION
With particular reference to Figures 1 to 3, the unit comprises a single frame casting 20 having a single cylinder 26 (Figure 4) mounted therein by means of a bolt 28. A tool 6 is removably inserted into a (lower)
*Lo end of the cylinder 26. A piston 25 is completely received in the cylinder 26 and reciprocable under motive fluid pressure therein for striking the tool 6.. Bolt holes 22 (Figure 2) comprise means for fastening the casting 20 to a pounder (not shown) . A control
__ valve 24 is provided for admitting motive fluid to the cylinder 26.
An air inlet 10 admits motive fluid into a passage 12 i the casting 20.
In the passage 12 is a venturi tube (not shown) below 2o which is a blocked drill hole and above which is a filter 16 through which oil seeps from a reservoir 17. Replenishment of the .oil in the reservoir 17 is effect through an inlet 19. A pressure equalization tube 13 exten _>ds from the inlet end of the passage 12 up into t
25 reservoir 17 through a top plate (not shown) . Air
"gU /,, entraining a lubricating mist goes from the passage 12 to an inlet chamber 21 and thence to the control valve 24.
The control valve assembly 24 is a conventional clack valve for supplying the motive air alternately to opposite working faces of a piston to cause the piston to reciprocate. The cylinder 26 is inserted downwardly into the frame casting 20, the control valve assembly 24 inserted over it, and the whole retained in position by o the top plate (not shown) .
From Figure 4, it can be seen that motive air is directed by the control valve assembly 24 alternately to a pneumatic working, chamber 29 above the piston to drive the piston downwardly, and through a vertical bore 30 and
■j_5 a radial bore 31 in the cylinder wall to a pneumatic chamber 32 below the piston to raise the piston for a repeat working stroke. At the extremes of piston movement, motive air is exhausted through passages 33,, 34 and 35 in the cylinder wall to an exhaust chamber 36
2o between the cylinder 26 and the frame casting 20, whence it may be directed to a silencer (not shown) or to jets (not shown) arranged to clear away the chippings produced in use.
At the downward limitof its travel, when the piston 25 25 has cleared the exhaust passage 33, it impacts a stem 37
■ of the tool 6. The stem 37 is slidably received in a bush 38 in the cylinder 26, and the tool 6 is retained in the cylinder by means of a beehive spring (not show engaging annular grooves 40 and 41 in the cylinder 26 and the tool 6 respectively.
By removal of the beehive springs, the tools 6 can eas be removed from the cylinders 26, for example for replacement when tungsten carbide teeth 42 thereon become worn.

Claims

1. A pounder unit comprising a frame, a single cylinder mounted upon or within the frame, a tool removably inserted into an end of the cylinder, a piston completely received in the cylinder and reciprocable under motive fluid pressure therein for striking the tool, means for fastening the frame to a pounder, and a valve for admitting motive fluid to the cylinder.
2. A pounder unit according to claim 1 in which the frame comprises a single casting.
3. A pounder unit according to claim 1 or claim 2 in which the fastening means comprises bolt holes.
4. A pounder unit as herein described with reference to the drawings.
EP19790900676 1978-12-29 1980-07-14 Pounder units Withdrawn EP0020346A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB5034678 1978-12-29
GB7850346 1978-12-29

Publications (1)

Publication Number Publication Date
EP0020346A1 true EP0020346A1 (en) 1981-01-07

Family

ID=10502007

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19790900676 Withdrawn EP0020346A1 (en) 1978-12-29 1980-07-14 Pounder units

Country Status (3)

Country Link
EP (1) EP0020346A1 (en)
AU (1) AU4881879A (en)
WO (1) WO1980001367A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU633125B2 (en) * 1989-07-27 1993-01-21 General And Railway Supplies Pty Ltd Impact hammer support and driving tool

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB141068A (en) * 1915-08-21 1920-07-15 Malleable Iron Fittings Co Improvements in or relating to percussive tools
US1644110A (en) * 1924-10-10 1927-10-04 Cover Henry Tribe Apparatus for breaking up concrete-road foundations and like structures
US3049097A (en) * 1959-09-29 1962-08-14 Kershaw John Knox Hydraulic pneumatic driving tool
US3090983A (en) * 1961-02-06 1963-05-28 Modrak Frank Carrier and manipulator for pneumatic tools
GB1177765A (en) * 1966-08-05 1970-01-14 Horace Briden Improvements in or relating to Devices for Applying Hammer Blows to a Body
FR2215293A1 (en) * 1973-11-28 1974-08-23 Poclain Sa
US4087010A (en) * 1977-01-31 1978-05-02 Stormon Harry J Apparatus for mounting a hand-held paving breaker on backhoe attachments

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8001367A1 *

Also Published As

Publication number Publication date
AU4881879A (en) 1980-07-03
WO1980001367A1 (en) 1980-07-10

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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

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19801224

RIN1 Information on inventor provided before grant (corrected)

Inventor name: FURBY, JIM