EP0771911A1 - Elément actif pour le support d'au moins un outil de fraisage susceptible d'être monté sur des cylindres de fraisage de machines de travail pour l'enlèvement de sols - Google Patents

Elément actif pour le support d'au moins un outil de fraisage susceptible d'être monté sur des cylindres de fraisage de machines de travail pour l'enlèvement de sols Download PDF

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Publication number
EP0771911A1
EP0771911A1 EP96117400A EP96117400A EP0771911A1 EP 0771911 A1 EP0771911 A1 EP 0771911A1 EP 96117400 A EP96117400 A EP 96117400A EP 96117400 A EP96117400 A EP 96117400A EP 0771911 A1 EP0771911 A1 EP 0771911A1
Authority
EP
European Patent Office
Prior art keywords
tool
holder
active element
milling
supporting element
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.)
Granted
Application number
EP96117400A
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German (de)
English (en)
Other versions
EP0771911B1 (fr
Inventor
Luciano Gelai
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.)
Caterpillar Prodotti Stradali SRL
Original Assignee
Bitelli SpA
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26332598&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0771911(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from ITVI950170 external-priority patent/IT1280602B1/it
Priority claimed from IT96VI000126 external-priority patent/IT1287325B1/it
Application filed by Bitelli SpA filed Critical Bitelli SpA
Publication of EP0771911A1 publication Critical patent/EP0771911A1/fr
Application granted granted Critical
Publication of EP0771911B1 publication Critical patent/EP0771911B1/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/18—Mining picks; Holders therefor
    • E21C35/19—Means for fixing picks or holders
    • E21C35/193—Means for fixing picks or holders using bolts as main fixing elements
    • E21C35/1933—Means for fixing picks or holders using bolts as main fixing elements the picks having a cylindrical shank
    • 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
    • B28D1/18—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by milling, e.g. channelling by means of milling tools
    • B28D1/186—Tools therefor, e.g. having exchangeable cutter bits
    • B28D1/188—Tools therefor, e.g. having exchangeable cutter bits with exchangeable cutter bits or cutter segments
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
    • E02F9/2866—Small metalwork for digging elements, e.g. teeth scraper bits for rotating digging elements
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
    • E21C25/06—Machines slitting solely by one or more cutting rods or cutting drums which rotate, move through the seam, and may or may not reciprocate
    • E21C25/10—Rods; Drums
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/18—Mining picks; Holders therefor
    • E21C35/19—Means for fixing picks or holders
    • E21C35/191—Means for fixing picks or holders for fixing holders

Definitions

  • the invention concerns an active element for the support of at least one milling tool, suited to be applied on milling drums of operating machines for the removal of soils and in particular for the removal of road surfacings.
  • each active element consists of a prismatic element which is welded to the milling drum and of a tool-holder provided with a hole suited to lodge the milling tool, wherein said tool-holder and said prismatic element are removably connected with one another by means of sliding profiles joined together and are mutually secured by means of screws.
  • a first inconvenience is that the realization cost of said sliding joined together profiles is rather high, since it also involves operations performed with machine tools in addition to the construction of possible molds for the casting and molding operations.
  • Another inconvenience is that, in order to obtain the prismatic profiles of connection between the elements having surfaces useful to resist to stresses, it is necessary to increase the dimensions of the active element on the whole, thus putting at a serious disterio the free space between the active elements in the working area, which is needed to help the discharge of the material which is removed.
  • a further inconvenience is that, in order to secure the tool-holder to the supporting prismatic element, it is necessary, as has been said, to use bolts which are in the immediate contact with the soil which is removed. This causes for the bolts to be subject to a high wear and sometimes also to breaking, with a consequent loss of the tool-holder and of the milling tool during the working process. Such a wear, even when it does not cause the breaking of the bolts, produces their damage at least, thus sometimes making it impossible to remove them whenever it is necessary to take apart the parts forming the active elements.
  • the active elements are all independent from each other, since their respective prismatic elements are secured to the milling drum supporting them one independent from the other and this fact reduces the resistance of each of them to the stresses which develop during their use.
  • the prismatic elements of the active elements are connected with one another by means of welded plates but this makes the maintenance activity more complicated, since, in order to take apart one active element, it is necessary to work with the manual grinding wheel to remove the weldings which connect said plates.
  • the present invention proposes to overcome all the mentioned inconveniences.
  • one of the purposes of the invention is to realize an active element for the support of at least one milling tool, suited to be applied to the milling drums of operating machines which, as compared with the active elements belonging to the known technique, involves lower manufacturing costs.
  • Another purpose is for the active element according to the invention to be less subject to the occurrence of slacks between the junctions during its use.
  • Another purpose is for the active element according to the invention to present a better mechanical resistance, as compared with active elements belonging to the known technique of equal dimensions.
  • a further purpose is for the active element according to the invention to present, as compared with active elements belonging to the known technique, a better resistance against the breaking of the securing means which connect the tool-holder with the supporting element welded to the milling drum.
  • Another purpose is for the active element according to the invention to permit, as compared with active elements belonging to the known technique, a faster replacement of both the tool-holder and the milling tool.
  • the active element prefferably be equipped with means suitable for preventing the loss of the tool-holder and of the milling tool, should the means securing said tool-holder to the supporting element break during the use.
  • an active element for the support of at least one milling tool said element being part of a plurality of elements belonging to the milling drums of operating machines for the removal of soils which, in accordance with the main claim, comprises:
  • said supporting element consists of a single block made of steel which is welded to said drum and which presents a hole having a circular section suited to lodge the tubular body having a circular section of said tool-holder.
  • the tubular body of said tool-holder presents a taper in the shape of a truncated-cone in correspondence with the part which matches the corresponding hole drilled in said supporting element and said hole presents a profile in the shape of a truncated-cone which can be coupled with said taper of said tool-holder.
  • Said milling tool is co-axially coupled in the tubular body of said tool-holder, in which there are also a plurality of through-going radial slits suited to lodge an axially forcing wedge for the removal of said tool.
  • the body of the tool-holder is also provided with a surface plane against which locking means co-operate.
  • the supporting element is formed by a first body which is secured by welding to said drum and by a second body which is lodged into a seat obtained in said first body and which presents a hole suited to receive the tool-holder with its respective tool.
  • Said second embodiment of said supporting element makes easier to put together right-hand and left-hand active elements suited to realize on the rotating drum right-hand and left-hand helixes, respectively.
  • the active element according to the invention is represented together with two other active elements similar to it, all of which are secured to the surface 2 of a milling drum 3 represented in a partial view.
  • said active element 1 comprises:
  • Each of said supporting elements 4 is secured to the surface 2 of the rotating drum 3 through connecting means which consist of a weld bead 9 and all of said supporting elements 4 are also secured together through other weld beads 10.
  • each supporting element 4 is axially removed on drum 3 by a distance 15 in relation to the supporting element adjacent to it, as can be observed in Fig. 1 wherein, in order to point out what has been said, one of the active elements is represented without the welding connecting it to the drum and to its adjacent element. All the active elements then, essentially form a helix which wraps around drum 3 as a single body, thus increasing the overall mechanical resistance of the drum and of the active elements.
  • said hole 6 is in the shape of a truncated-cone suited to lodge part 51 of said tool-holder 5 which, as can be observed in Fig. 4, consists of a tubular body presenting a taper 52 equal to the taper, not represented, with which said hole 6 is made.
  • the coupling between the tool-holder 5 and the supporting element 4 occurs by the interference of the taper which ensures a good stability of the connection and the absence of slacks.
  • said tool-holder 5 presents a tubular body and is provided with a recess consisting of a through-going axial hole 8 which is suited to lodge the milling tool 7, the body of which, as can also be observed in Fig. 4, presents a cylindrical area 71 comprised between a pair of annular areas 72 and 73 having larger diameters as compared with said cylindrical area 71, the latter being suited to receive the coupling of an elastic sleeve 13 which presents, when viewed in a cross-section, essentially a C-shape.
  • the milling tool 7 is provided with an insert 90 made of a hard material, preferably tungsten carbide.
  • the inner hole 65 of the elastic sleeve 13 presents a slightly smaller diameter as compared with the cylindrical area 72 of the milling tool 7, so that sleeve 13, in order to be coupled with the cylindrical area 71, must be axially forced beyond the annular area 72 and, once the coupling has been done, the elastic sleeve 13 remains stably comprised between the annular areas 72 and 73 and co-axial with the cylindrical area 71, on which it is loosely fitted.
  • the milling tool 7 is then axially fitted within recess 8 of the tool-holder 5 by forcing the elastic sleeve 13 which presents a slightly larger outside diameter than the inside diameter of recess 8 and, after the coupling, the contrast of the elastic sleeve 13 against the annular area 53 of the tool-holder 5, ensures the stability of the connection between the milling tool 7 and the tool-holder 5.
  • Fig. 1 it can also be observed that the alignment axis 12 of the milling tool 7 and of the tool-holder 5 is slanted by an angle 13 in relation to surface 2 of the rotating drum 3 and this causes the component 20 of the stress, which is exerted along axis 12 of each milling tool 7 during the working process, to be partly discharged on the supporting element of the adjacent active element, since, as has already been said, all the active elements are mechanically secured together by means of the welding beads 10. This fact allows a better distribution of the stresses on the supporting elements and, therefore, on the milling drum 3, to the great advantage of a higher resistance.
  • connecting means are foreseen, which consist of a surface plane 54 obtained externally to said tool-holder 5, which co-operates by contrast with locking means consisting of at least one bolt 55 which matches a threaded through-going hole 56 drilled in the supporting element 4.
  • locking means consisting of at least one bolt 55 which matches a threaded through-going hole 56 drilled in the supporting element 4.
  • each active element is also provided with at least one adjusting element consisting of at least one plate 61 secured through at least one bolt 62 inside a recess 63 obtained in the supporting element 4, said plate making up for possible slacks which might occur in the course of the time between the tool-holder 5 and hole 6 drilled in the supporting element 4 with which the tool-holder 5 is coupled.
  • Fig. 7 A different embodiment of the adjusting element is represented in Fig. 7 wherein it can be observed that said adjusting element consists of a bolt 162 which is tightened in a threaded hole 163 drilled in said supporting element 4 and whose head 161, which is adjustable by means of a control key, inteferes against said tool-holder 5 and recovers possible slacks existing between the tool-holder 5 and hole 6 lodging it.
  • said adjusting element is provided with safety means 81 consisting of a hole 84, drilled through co-axially in said bolt 162, within which is inserted a ball 82 made elastic through a spring 83, the thrust of which forces ball 82 inside a recess 85 obtained in the body of the tool-holder 5.
  • a forcing wedge 91 represented in Fig. 6, is used. This is inserted into one of the slits 58 going through the body 51 of the tool-holder 5, so that they communicate with the through-going hole 8 which forms the recess within which the milling tool 7 is lodged.
  • the thrust of the forcing wedge 91 following direction 92 causes an axial thrust following direction 93 on the milling tool 7 which is easily ejected.
  • the active elements are arranged on the milling drum according to one or more right-hand and left-hand helixes which develop beginning from the centre of the drum itself. Moreover, in order for all of the active elements to be in the same working conditions, independently on whether they belong to the right-hand or the left-hand helix, it is necessary for the longitudinal axis of the tool of each active element to be slanted by the same angle in relation to the axis of the respective helix and, preferably, to be sligthly convergent toward the centre of the drum itself.
  • each supporting element presents the hole lodging the tool-holder oriented in a different way, depending on whether the active element, which said supporting element forms, belongs to either a right-hand helix or to a left-hand helix. This fact causes the inconvenience to have to realize right and left supporting elements, not interchangeable with one another.
  • a different embodiment of the invention foresees for the active element to be provided with a supporting element which, instead of being realized in one piece, is composed of a right-hand or left-hand body which is secured to the drum so as to define the right-hand and the left-hand helixes, respectively, and of a universal body, which supports the tool-holder with the corresponding tool, which is lodged without distinction in a seat obtained in either said right-hand body or in said left-hand body.
  • the active element of the invention is realized in the right-hand version, indicated as a whole with 40, and in the left-hand version, indicated as a whole with 70, suited to realize on the milling drum 300 right-hand helixes 400 and left-hand helixes 700, respectively.
  • Each right-hand active element 40 presents a supporting element 401 formed by a right-hand base 402 which is secured to the milling drum 300 through first securing means consisting of weldings 403 and by a universal body 100, also visible in the Figs. from 19 to 22, in which there is the hole in the shape of a truncated-cone 105 which lodges the tool-holder 50 with the corresponding tool 80 and which, in turn, is lodged in a seat 406 present in said right-hand base 402, visible in better details in Fig. 15.
  • each left-hand active element 70 presents a supporting element 701 formed by a left-hand base 702 which is secured to the milling drum 300 through first securing means consisting of weldings 703 and by the same universal body 100 which is lodged in a seat 706 present in said left-hand base 702 and visible in better detail in Fig. 17.
  • the right-hand basis 402 and left-hand base 702 are realized specular in relation to one another, so that when they are arranged according to axis 121 or 131, respectively, of the right or left helix to which they belong, their seats 406 and 706 which lodge the same universal body 100, can orient the universal body 100 itself so that, as can be observed in the Figs. 9 and 13, the axis 251 of the tool-holder 50 and of the corresponding tool 80 are slanted by the same angle 151 in relation to the longitudinal axis 121 and 131 of the helix to which they belong. In this way, all the tools 80, independently from the helix and from the active element to which they belong, turn out to be slanted by the same angle 221 in relation to the longitudinal axis 200 of the milling drum, as can be observed in Fig. 8.
  • the universal body 100 when the universal body 100 is lodged in the right-hand base 402 to form the right-hand active element 40, it is inserted in seat 406, positioned as represented in the plan view of Fig. 19, while when it is lodged in the left-hand base 702 to form the left-hand active element 70, it is inserted in seat 706, positioned as represented in the plan view of Fig. 21, that is, in the position it acquires when from the position of Fig. 19 it is turned around axis 120 following the anti-clockwise direction 145. It can be observed, in fact, that in both the right-hand active element 40 represented in Fig. 10 and in the left-hand active element 70 represented in Fig.
  • each of said bottom contrast surfaces 144 and 44 there is a pair of holes 147 and 47, respectively, each of which lodges a cylindrical pin, not represented, which matches a corresponding hole 427 and 727, respectively, visible in the Figs. 15 and 17, drilled in each right-hand base 402 and left-hand base 702, respectively.
  • the presence of such pins and of such holes permits the centering of the universal body with its corresponding base, before stably and irremovably securing the universal body to the base itself through said second securing means which consist of the weldings 146 visible in the Figs. 11 and 14.
  • each tool-holder 50 is slanted by an angle 151 in relation to the corresponding helix and, as can be observed, it turns out to be slightly convergent toward the centre.
  • the active elements according to the invention permit to realize very easily the terminal part of each helix in correspondence with the extremities of drum 300 wherein, as can be observed in Fig. 8, the tools of the active elements 250 and 270 which protrude in relation to the right extremity 350 and left extremity 370 of the drum itself, in order to obtain the finish of the edge 251 and 271, respectively, of the excavation to be performed.
  • each active element will be completed by applying the same universal body inserted in its corresponding seat.
  • each right-hand base 402 and left-hand base 702 defines, with its respective drum, a cavity 600 which is necessary to reduce the total weight of the drum and the perimeter of the element welded to the drum itself, thus obtaining the double advantage of reducing the cost of welding and of limiting the heating of the drum caused by the welding itself, thus limiting possible deformations.
  • the means for locking, for adjusting and for the safety, for the coupling between each tool-holder and its corresponding supporting element may also be manufactured differently.
  • the degree of inclination of the helixes according to which said active elements are arranged on the drum, as well as the degree of inclination of the angle of the tool themselves may vary.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Structural Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Milling Processes (AREA)
  • Road Repair (AREA)
  • Earth Drilling (AREA)
EP96117400A 1995-10-31 1996-10-30 Elément actif pour le support d'au moins un outil de fraisage susceptible d'être monté sur des cylindres de fraisage de machines de travail pour l'enlèvement de sols Revoked EP0771911B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
ITVI950170 1995-10-31
ITVI950170 IT1280602B1 (it) 1995-10-31 1995-10-31 Elemento attivo atto ad essere applicato sui tamburi fresanti di macchine operatrice per la rimozione della superficie di suoli
IT96VI000126 IT1287325B1 (it) 1996-07-30 1996-07-30 Elemento attivo per tamburi fresanti di macchine operatrici per la lavorazione di suoli.
ITVI960126 1996-07-30

Publications (2)

Publication Number Publication Date
EP0771911A1 true EP0771911A1 (fr) 1997-05-07
EP0771911B1 EP0771911B1 (fr) 2001-08-22

Family

ID=26332598

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96117400A Revoked EP0771911B1 (fr) 1995-10-31 1996-10-30 Elément actif pour le support d'au moins un outil de fraisage susceptible d'être monté sur des cylindres de fraisage de machines de travail pour l'enlèvement de sols

Country Status (4)

Country Link
EP (1) EP0771911B1 (fr)
AT (1) ATE204625T1 (fr)
DE (1) DE69614634T2 (fr)
ES (1) ES2162965T3 (fr)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1000721A1 (fr) * 1998-11-10 2000-05-17 BITELLI S.p.A. Porte-outil pour des tambours de fraise d'un dispositif de fraisage
EP1033216A1 (fr) * 1999-03-03 2000-09-06 BITELLI S.p.A. Un porte outil pour un tambour de fraise pour enlever du sol
EP1045075A2 (fr) * 1999-04-12 2000-10-18 BITELLI S.p.A. Outil à échange rapide pour tambour de fraisage à fraiser le sol au moyen de véhicules poids-lourds
WO2000070149A1 (fr) * 1999-05-18 2000-11-23 Anthony Richard Schibeci Appareil de coupe pour enlever des revetements de route et autres operations minieres et de terrassement
EP1375102A1 (fr) * 2002-06-19 2004-01-02 BITELLI S.p.A. Tambour de fraise pour dispositif de travaux routiers
US7537288B2 (en) * 2007-09-27 2009-05-26 Everpads Co., Ltd. Tool holding device
BG1212U1 (en) * 2008-09-30 2009-09-30 Schwamborn Geraеtebau Gmbh BEND FOR THE SURFACE TREATMENT AND MY FITTING TO THE MESH
US7597402B2 (en) 2004-06-24 2009-10-06 Wirtgen Gmbh Tool holder
US7789468B2 (en) * 2008-08-19 2010-09-07 The Sollami Company Bit holder usable in bit blocks having either of a cylindrical or non-locking taper bore
US7938350B2 (en) * 2004-09-16 2011-05-10 Doppstadt Calbe Gmbh Knife holder for comminution devices
US7950745B2 (en) * 2000-02-15 2011-05-31 The Sollami Company Streamlining bit assemblies for road milling, mining and trenching equipment
WO2012072785A2 (fr) 2010-12-03 2012-06-07 Wirtgen Gmbh Porte-burin
DE102011051523A1 (de) 2011-07-04 2013-01-10 Wirtgen Gmbh Meißelhalter
US8950821B2 (en) * 2012-07-31 2015-02-10 Caterpillar Paving Products Inc. Milling drum having integral tool mounting blocks
US9151157B2 (en) 2010-12-03 2015-10-06 Wirtgen Gmbh Chisel holder
US9163502B2 (en) 2010-12-03 2015-10-20 Wirtgen Gmbh Chisel holder, and chisel holder system comprising a chisel holder and a base part
US9260965B2 (en) 2011-07-04 2016-02-16 Wirtgen Gmbh Chisel holder for a soil treatment machine
US9267373B2 (en) 2010-12-03 2016-02-23 Wirtgen Gmbh Chisel holder and lower tool part for a chisel holder
US9376911B2 (en) 2010-12-03 2016-06-28 Wirtgen Gmbh Chisel holder, and chisel holder system comprising a chisel holder and a base part
JP2017048680A (ja) * 2012-03-08 2017-03-09 ヴィルトゲン ゲゼルシャフト ミット ベシュレンクテル ハフツングＷｉｒｔｇｅｎ ＧｍｂＨ 路面切削用の自走式道路切削機、特に大型切削機、および路面切削の方法
US10233752B2 (en) * 2016-05-31 2019-03-19 Everpads Co., Ltd. Cutting tool holding mechanism
CN111954738A (zh) * 2018-04-13 2020-11-17 卡特彼勒公司 具有圆柱形轮廓的刀头和刀片组件

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* Cited by examiner, † Cited by third party
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DE102007020303B4 (de) 2007-04-22 2014-10-02 Schwamborn Gerätebau Gmbh Rundschaftmeißel für Meißelfräsen nebst Halterung
US10167720B2 (en) 2016-01-13 2019-01-01 Caterpillar Paving Products Inc. Milling tool holder
US10113424B2 (en) 2016-01-13 2018-10-30 Caterpillar Paving Products Inc. Milling tool holder
US10184336B2 (en) 2016-01-13 2019-01-22 Caterpillar Paving Products Inc. Milling tool holder

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DE2919774A1 (de) * 1978-05-12 1979-11-15 Dresser Ind Mehrschneidenmeissel fuer eine schneidendrehtrommel
US4195946A (en) * 1977-02-04 1980-04-01 Cmi Corporation Method for resurfacing a paved roadway
EP0025421A2 (fr) * 1979-08-08 1981-03-18 Sandvik Aktiebolag Porte d'outil et un tambour de coupe pour machines d'excavation de terre
US4262966A (en) * 1979-04-25 1981-04-21 Allied Steel & Tractor Products, Inc. Road surface removing machine
GB2118227A (en) * 1982-04-08 1983-10-26 Kennametal Inc Earthworking tool and method for protecting from abnormally high cutting loads
EP0096585A1 (fr) * 1982-06-08 1983-12-21 Koehring Company Machine à travailler le sol
DE3712135A1 (de) * 1986-04-16 1987-10-22 Taisei Road Construction Erneuerungsmaschine fuer strassenoberflaechen
EP0259620A1 (fr) * 1986-09-09 1988-03-16 Kennametal Inc. Outil coupant ayant une pointe pénétrante à section centrale définie comme une surface concave de révolution
US5078540A (en) * 1990-08-24 1992-01-07 Astec Industries, Inc. Asphalt pavement milling machine and cutter drum therefor

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4195946A (en) * 1977-02-04 1980-04-01 Cmi Corporation Method for resurfacing a paved roadway
DE2919774A1 (de) * 1978-05-12 1979-11-15 Dresser Ind Mehrschneidenmeissel fuer eine schneidendrehtrommel
US4262966A (en) * 1979-04-25 1981-04-21 Allied Steel & Tractor Products, Inc. Road surface removing machine
EP0025421A2 (fr) * 1979-08-08 1981-03-18 Sandvik Aktiebolag Porte d'outil et un tambour de coupe pour machines d'excavation de terre
GB2118227A (en) * 1982-04-08 1983-10-26 Kennametal Inc Earthworking tool and method for protecting from abnormally high cutting loads
EP0096585A1 (fr) * 1982-06-08 1983-12-21 Koehring Company Machine à travailler le sol
DE3712135A1 (de) * 1986-04-16 1987-10-22 Taisei Road Construction Erneuerungsmaschine fuer strassenoberflaechen
EP0259620A1 (fr) * 1986-09-09 1988-03-16 Kennametal Inc. Outil coupant ayant une pointe pénétrante à section centrale définie comme une surface concave de révolution
US5078540A (en) * 1990-08-24 1992-01-07 Astec Industries, Inc. Asphalt pavement milling machine and cutter drum therefor

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1000721A1 (fr) * 1998-11-10 2000-05-17 BITELLI S.p.A. Porte-outil pour des tambours de fraise d'un dispositif de fraisage
EP1033216A1 (fr) * 1999-03-03 2000-09-06 BITELLI S.p.A. Un porte outil pour un tambour de fraise pour enlever du sol
EP1045075A3 (fr) * 1999-04-12 2000-12-13 BITELLI S.p.A. Outil à échange rapide pour tambour de fraisage à fraiser le sol au moyen de véhicules poids-lourds
EP1045075A2 (fr) * 1999-04-12 2000-10-18 BITELLI S.p.A. Outil à échange rapide pour tambour de fraisage à fraiser le sol au moyen de véhicules poids-lourds
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Also Published As

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ES2162965T3 (es) 2002-01-16
DE69614634D1 (de) 2001-09-27
ATE204625T1 (de) 2001-09-15
EP0771911B1 (fr) 2001-08-22
DE69614634T2 (de) 2002-07-04

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