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WO2009098699A1 - Barre-guide pour scies à chaînes motorisées - Google Patents

Barre-guide pour scies à chaînes motorisées Download PDF

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Publication number
WO2009098699A1
WO2009098699A1 PCT/IL2009/000148 IL2009000148W WO2009098699A1 WO 2009098699 A1 WO2009098699 A1 WO 2009098699A1 IL 2009000148 W IL2009000148 W IL 2009000148W WO 2009098699 A1 WO2009098699 A1 WO 2009098699A1
Authority
WO
WIPO (PCT)
Prior art keywords
guide bar
pulley assembly
bearing
edges
discs
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.)
Ceased
Application number
PCT/IL2009/000148
Other languages
English (en)
Inventor
Jean Ramon
Freddy Derfler
Ran Gur
Genadi Rabinobitch
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.)
TOOLGAL DEGANIA INDUSTRIAL DIAMONDS Ltd
Original Assignee
TOOLGAL DEGANIA INDUSTRIAL DIAMONDS 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 TOOLGAL DEGANIA INDUSTRIAL DIAMONDS Ltd filed Critical TOOLGAL DEGANIA INDUSTRIAL DIAMONDS Ltd
Publication of WO2009098699A1 publication Critical patent/WO2009098699A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B17/00—Chain saws; Equipment therefor
    • B27B17/02—Chain saws equipped with guide bar
    • B27B17/04—Roller bearing guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B17/00—Chain saws; Equipment therefor
    • B27B17/02—Chain saws equipped with guide bar
    • 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
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/08—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with saw-blades of endless cutter-type, e.g. chain saws, i.e. saw chains, strap saws
    • B28D1/082—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with saw-blades of endless cutter-type, e.g. chain saws, i.e. saw chains, strap saws consisting of chain saws

Definitions

  • This invention relates to guide bars for chain saws and more particularly to improving the durability of guide bars for power chain saws, such as chain saws for cutting hard materials such as concrete and reinforced concrete.
  • a power chain saw such as a concrete cutting chain saw has several concerns, whereas one of the main concerns is the durability of the chain and the durability of the guide bar.
  • Concrete cutting chain saws have been considered to require a substantial drive motor, e.g. ranging from a low of about 5 horsepower motor to as high as 9 horsepower motor or more. Having high power on the one hand and high cutting resistance on the other, concrete cutting generates a vast amount of wear due to the grinding process and heat and dust generated. Hence, improving the durability of the chain and the guide bar is a major concern of a concrete cutting chain saw.
  • the chain and the chain guide bar are disposable, that is, the chain and the chain guide bar are replaced after a few hours of accumulated work.
  • Guide bar 10 includes rim 20, rounded portion 30 of the rim and sprocket 40 disposed at the radial center of rounded portion 30 of rim 20.
  • One solution of prior art guide bars is to use hardened steel, such as carbon constructional steel. The manufacturing by local hardening of carbon constructional steel guide bars being expensive, in some prior art guide bars "Stellite" cladding of the wear area, such as at the guide bar rim, is used on an ordinary steel body. However, this is still an expensive solution.
  • US Patent 6186136 provides a guide bar 10 coupled to a chain (not shown) that moves rapidly along a slot at rim 20 as well as at rounded rim portion 30, and applying a wear force to rim 20 and to rounded portion 30 of rim 20.
  • US Patent 6397475 given to Karl-olov Pettersson et al, provides a guide bar 10 coupled to a chain that runs rapidly along a slot at rim 20 as well as at rounded rim portion 30, whereas the links of the moving chain push teeth 45 and thereby rotating sprocket 40 about axis 42, and thereby improving the durability of rounded rim portion 30.
  • the chain applies force vector 50 on sprocket 40.
  • Force vector 50 is a radial force which is transferred to the bearing of sprocket 40.
  • there is a manufacturing tolerance which gives the moving parts (spherical or cylindrical) some freedom to move inside the bearing housing.
  • the force vector 50 is transferred to two of the multiple moving parts (spherical or cylindrical) and thereby causing an accelerated deterioration of the two moving parts absorbing force vector 50.
  • Force vector 50 also increases the wear force applied to rounded portion 30 of rim 20, which in turn increases force vector 50, which in turn increases the wear force applied to rounded portion 30 of rim 20, and so on and so forth.
  • the pitch between teeth 45 of sprocket 40 is fixed. It is therefore desirable to have a guide bar that is not coupled only to chains with a particular pitch between the chain links, but a guide bar that can be coupled to various chains irrespective of the pitch between the chain links.
  • austenitic manganese steel refers to a steel grade which has outstanding wear resistance capabilities, in the as-supplied state. This steel is known as "austenitic-manganese", “Hadfield”, “K700”, X120Mnl2, W. No. 1.3401, and other names, according to various standards and trade names. Numerous variations of austenitic manganese steel exist. For example, the chemical composition of standard “W. No. 1.3401" steel includes 1.12 wt% Carbon, 12.25 wt% Mn, 0.33 wt% Si, and 0.22 wt%Cr. The remainder is iron, in an "austenitic solution” heat treated state.
  • austenitic manganese steels having essentially the same or better properties have the following chemical composition: from 0.6 to 1.8 wt% Carbon, from 7 to 16 wt% Mn, with any addition of at least one of the following: 0-3 wt% Ti, Cr, B, V, Zr, and/or N, each element alone or in any combination thereof. The remainder is iron.
  • the principal intentions of the present invention include providing a guide bar for power chain saws, such as concrete cutting chain saws, whereas the guide bar includes a toothless front pulley, which includes a four-point bearing and dirt trapping grooves.
  • the guide bar is preferably made of wear-resistant austenitic manganese steel.
  • a guide bar for operatively holding and guiding the chain of power chain saws, the guide bar including: a) a housing body having a front end and a back end, wherein the housing body includes two sides, wherein each of the sides are affixed to each other in an assembled state, the two sides being substantially a reverse image of each other; and b) a pulley assembly, wherein the pulley assembly includes two discs and a body, wherein the two discs and the body form a four-point bearing in an assembled state of the pulley assembly.
  • the housing body holds the pulley assembly, firmly.
  • the four-point bearing is a four- point-bearing-roller.
  • the four-point-bearing-roller includes roller balls housed between two V-grooves formed by the t ⁇ vo discs and the body of the pulley assembly.
  • the four-point bearing is a four- point-bearing-roller.
  • the four-point-bearing-roller includes roller balls housed between two concave grooves formed respectively by the two discs and the body of the pulley assembly.
  • the discs of the pulley assembly further includes circumferential grooves that operatively trap particles of debris.
  • the housing body further includes a carrying portion that includes an elongated leading portion and a stopper portion.
  • the elongated leading portion include two substantially parallel edges.
  • the pulley assembly includes two anchoring legs that form substantially parallel inner edges. The distance between the parallel edges of the elongated leading portion is substantially the same as the distance between the parallel inner edges of the anchoring legs. Thereby, the inner edges of the anchoring legs can slide over the edges of the elongated leading portion with substantially no tolerance between the inner edges of the anchoring legs and the edges of the elongated leading portion.
  • An aspect of the present invention is to enable quick replacement of the pulley assembly without having to replace the guide bar as a whole.
  • the pulley assembly When assembling the pulley assembly into the housing body, the pulley assembly is inserted through an opening at the front end of the housing body.
  • the inner edges of the anchoring legs slide inwardly over the edges of the elongated leading portion until the ends of the anchoring legs reach the edges of the stopper portion.
  • the four-point-bearing-roller has both lateral and radial stress bearing capability, a property absent in the prior art, used by other guide-bars manufacturers. In other manufacturers' designs, only the radial forces are handled by the bearing, while lateral forces are burdened on plain rubbing on the side steel plates. Therefore, the four-point-bearing-roller design is saving power on the cutting engine, by not wasting it on internal wear between the chain, the pulley and the guide bar itself.
  • An aspect of the present invention is to provide a guide bar for power chain saw, such as concrete cutting chain saw, wherein at least a portion of the guide bar is made of austenitic manganese steel Austenitic manganese steel also represents a manufacturing shortcut, by avoiding additional steps of hardening, tempering, straightening, cladding and flat grinding necessary in other manufacturers processes
  • FIG 1 (p ⁇ or art) illustrates a prior art guide bar for a concrete cutting chain saw
  • FIG 2 illustrates a guide bar for power chain saws, according to embodiments of the present invention
  • FIGs 3a and 3b illustrate the guide bar shown m Figure 2
  • Figure 3a shows one side of the housing body and the front pulley assembly
  • Figure 3b shows the complementing side of the housing and the front pulley assembly
  • FIG 4a is a side view illustration of front pulley assembly of guide bar shown m Figure 2
  • FIG 4b is a cross section W-W, front view illustration of front pulley assembly shown in Figure 4a,
  • FIG 4c is a top view illustration of front pulley assembly shown in Figure 4a
  • FIG 5 illustrates the body of the front pulley assembly shown in Figures 4a-4c
  • FIG 6a is a front view illustration of one of the two symmetrical discs of pulley of the front pulley assembly shown in Figures 4a-4c,
  • FIG 6b is a side view illustration of the disc shown m Figure 6a
  • FIG 7 illustrates the details of window Y shown in Figure 4b
  • FIG 8 illustrates the details of window Z shown in Figure 5
  • FIG. 9 is a perspective view illustration of the front pulley assembly shown in Figures 4a-4c.
  • FIG. 10 illustrates a guide bar for power chain saws, according to preferred embodiments of the present invention
  • FIG. 1 Ia is a side view illustration of front pulley assembly of the guide bar shown in Figure 10;
  • FIG. 1 Ib is a cross section A-A, front view illustration of front pulley assembly shown in Figure 11a;
  • FIG. 1 Ic is a top view illustration of front pulley assembly shown in Figure 11a;
  • FIG. 12 illustrates the body of the front pulley assembly shown in Figures 1 Ia-I Ic;
  • FIG. 13a is a front view illustration of one of the two symmetrical discs of pulley of the front pulley assembly shown in Figures 1 Ia- lie;
  • FIG. 13b is a side view illustration of the disc shown in Figure 13a;
  • FIG. 14 illustrates the details of window B shown in Figure l ib;
  • FIG. 15 illustrates the details of window C shown in Figure 12;
  • FIG. 16 is a perspective view illustration of the front pulley assembly shown in Figures 1 Ia-I Ic, with one disc removed for illustrative purposes only.
  • FIG. 17 illustrates the details of window D shown in Figure 15;
  • FIG. 18 illustrates a guide bar for power chain saws of the guide bar shown in Figure 1O 5 whereas one side of the housing body is removed for illustrative purposes only, in a working state;
  • FIG. 19 illustrates an exploded view of the guide bar shown in Figure 18.
  • FIG. 20 illustrates the guide bar shown in Figure 18, in an intermediate assembly state.
  • the principal intentions of the present invention include providing a guide bar for power chain saws, such as concrete cutting chain saws, whereas the guide bar includes a toothless front pulley, which includes a four- point bearing and dirt trapping grooves.
  • the guide bar is preferably made of wear- resistant austenitic manganese steel. Austenitic manganese steel also represents a manufacturing shortcut, by avoiding additional steps of hardening, tempering, straightening, cladding and flat grinding necessary in other manufacturers processes.
  • FIG. 2 illustrates guide bar 100 for power chain saws, such as concrete cutting chain saws, according to embodiments of the present invention.
  • Guide bar 100 includes a body 110 and a rotating front pulley 140 at the front end of guide bar 100, which is can rotate about axis 142.
  • the chain of the chain saw (not shown) performs penetration cuts into rigid matters such as concrete walls, including reinforced concrete walls.
  • the chain runs over rim 120 of body 110, as in prior art chain saws.
  • the chain does not go over the rounded front rim of body 110, but rather on rim 141 of front pulley 140, thereby avoiding the deterioration of the front rim.
  • body 110 of guide bar 100 includes an assembly of three steel layers, whereas the two outer layers HOa and HOb are preferably made of the above austenitic manganese steel. In-between, an arrangement is laid out of machined parts, made of a simple material, such as soft steel or other suitable sheet stock.
  • the intermediate layers keep the two outer layers HOa and HOb at the correct spacing as well as serves as water conduits to pre-determined exit ports, to cool, lubricate and flush the whole device during work.
  • Figures 3a and 3b which illustrate guide bar 100
  • Figure 3a shows one side (HOa) of housing body HO and front pulley assembly 160
  • Figure 3b shows the complementing side (HOb) of housing body 110 and front pulley assembly 160
  • side HOa of housing body 110 and side HOb of housing body 110 are affixed together by any attaching mechanism, including screws and nuts, spot welding or any other suitable method
  • One pulley side 140a is affixed to the other pulley side 140b by any attaching mechanism, including screws 147b and nuts 147a, spot welding or any other suitable method
  • FIG 4a is a side view illustration of front pulley assembly 160 of guide bar 100 shown in Figure 2
  • Figure 4b is a cross section W-W
  • front view illustration of front pulley assembly 160 shown m Figure 4a and to Figure 4c which is a top view illustration of front pulley assembly 160
  • the whole pulley assembly 160 is a separate entity, which provides guide bar 100 with an elongated life span, with respect to prior art guide bars
  • a key element in achieving the elongated life span is the four-point-bea ⁇ ng- roller which is designed to keep the thickness of pulley 140 within the typical 5mm requirement
  • the four-pomt-bea ⁇ ng- roller provides "zero clearance ' ' or otherwise stated "pre-stressed” assembling of this type of bearing This property stems from its conceptual design which, when properly realized, gives the bearing a contact area approaching half of the race circumference and thereby a much lower contact pressure is achieved, improving significantly the bearing lifespan
  • the four-pomt-bea ⁇ ng-roller has both lateral and radial stress capacity, a property absent in the prior art, used by other guide-bar manufacturers In other manufacturers' designs, only the radial forces are handled by the bearing, while lateral forces are burdened on plain rubbing on the side steel plates Therefore, the four- pomt-bea ⁇ ng-roller design is saving power on the cutting engine, by not wasting it on internal wear between the chain, the pulley and the guide bar itself
  • FIG. 5 illustrates body 162 of the front pulley assembly 160
  • Figure 6a is an illustration a front view of one of the two symmetrical discs of pulley 140
  • Figure ⁇ b which is a side view illustration of disc 140 shown m Figure 6a
  • Body 162 includes outer annular portion 163 and anchoring legs 169
  • Anchoring legs 169 are designed to affix front pulley assembly 160 to body 110 of guide bar 100
  • Anchoring legs 169 are appropriately engineered to provide a balanced amount of strength and stiffness to pulley assembly 160.
  • it incorporates an essential cooling conduit 167, directing cooling water to the bearing, which is needed to keep the bearing working temperature at levels compatible with the materials used.
  • Annular portion 163 has an outer radius Tbz, an inner radius ⁇ 1 , and a groove depth radius r b2 - Groove 164 is a V-groove that serves as the outer race of the bearing of front pulley assembly 160.
  • Each of symmetrical discs 140 has an outer radius of r d 3, an inner radius r c io, an inner V-groove radius r t n, an outer V-groove radius r d2 and a body groove radius r d4 .
  • V-groove 145 coupled with slope 145 of the other disc 140, form another V- groove, opposing V-groove 164 of annular portion 163 and serves as the inner race of the bearing of front pulley assembly 160.
  • V-grooves 145 and 164 serve as the housing of the balls of the bearing.
  • Figure 7 illustrates the details of window Y shown in Figure 4b
  • Figure 8 which illustrates the details of window Z shown in Figure 7.
  • Pulley assembly 160 is a separate entity, which provides guide bar 100 elongated life span, with respect to prior art guide bars.
  • Slopes 145a, and 145b form a V-groove and together with V-groove 164 provide a rhombus housing for roller balls 180, whereas each ball 180 touches each slope of each V-groove (145, 164) at one point only (182).
  • Figure 9 which is a perspective view illustration of front pulley assembly 160
  • roller balls 180 are viewed disposed inside V-groove 164.
  • a full row of roller balls 180 is filled in, with appropriate greasing.
  • the size of each roller ball 180 is such that the external radius of roller balls 180 is brought into intimate contact with the slopes of V-grooves 145 and 164, thus realizing a closed structure.
  • V-groove 164 When the chain saw is operating, V-groove 164 is static while V-groove 145, being part of pulley discs 140, rotated by the chain, thereby V-grooves 145 roll over roller balls 180 which roll with V-groove 145.
  • roller balls 180, body 162 and discs 140 are treated with hardening procedures to increase their durability to abrasion. While in prior art bearings used in front end sprockets only radial forces are applied to the moving parts (spherical or cylindrical), roller balls 180 of the present invention have both radial and tangential forces applied to, which stabilizes pulley 140 motion.
  • the 4-points- bearing has substantially no clearance between balls 180 and V-grooves 145 and 164, and wear force vector 50 applied by the operating chain onto the bearing is applied to nearly half the number of roller balls 180 (and not only on two at the time as in prior art), thereby substantially increasing the life span of roller balls 180.
  • the inner radius (rao) of pulley 140 is substantially sealed, thereby occluding the entrance of abrasive debris and thus, eliminating the accelerated wear expected in working in such a harsh environment, as in concrete cutting.
  • discs 140 further include circumferential grooves 149.
  • Circumferential grooves 149 serve as traps to the particles of debris in order to minimize the penetration of debris from the inner side of pulley 140 and thereby hinder the seepage of debris to the bearing.
  • Guide bar 200 includes a body 210 and a rotating front pulley 240 at the front end of guide bar 200, which is can rotate about axis 242.
  • the chain of the chain saw (not shown) performs penetration cuts into rigid matters such as concrete walls, including reinforced concrete walls.
  • the chain runs over rim 220 of body 210, as in prior art chain saws.
  • the chain does not go over the rounded front rim of body 210, but rather on rim 241 of front pulley 240, thereby avoiding the deterioration of the front rim.
  • Figure 11a is a side view illustration of front pulley assembly 260 of guide bar 200 shown in Figure 10.
  • Figure 11a is a side view illustration of front pulley assembly 260 of guide bar 200 shown in Figure 10.
  • Figure lib which is a cross section A-A, front view illustration of front pulley assembly 260 shown in Figure l la, and to Figure l ie which is a top view illustration of front pulley assembly 260.
  • the whole pulley assembly 260 is a separate entity, which provides guide bar 200 with an elongated life span, with respect to prior art guide bars.
  • a key element in achieving the elongated life span is the four-point-bearing- roller which is designed to keep the thickness of pulley 240 within the typical 5mm requirement.
  • the four-point-bearing-roller provides "zero clearance" or otherwise stated ''pre-stressed” assembling of this type of bearing. This property stems from a conceptual design that gives the bearing a contact area having a much lower contact pressure, improving significantly the bearing lifespan.
  • the four-point-bearing-roller has both lateral and radial stress capacity, a property absent in the prior art, used by other guide-bar manufacturers. In other manufacturers' designs, only the radial forces are handled by the bearing, while lateral forces are burdened on plain rubbing on the side steel plates. Therefore, the four- point-bearing-roller design is saving power on the cutting engine, by not wasting it on internal wear between the chain, the pulley and the guide bar itself.
  • FIG. 12 illustrates body 262 of the front pulley assembly 260
  • Figure 13a is an illustration a front view of one of the two symmetrical discs of pulley 240
  • Figure 13b which is a side view illustration of disc 240 shown in Figure 13a.
  • Body 262 includes outer annular portion 263 and anchoring legs 269.
  • Anchoring legs 269 are designed to affix front pulley assembly 260 to body 210 of guide bar 200.
  • Anchoring legs 269 are appropriately engineered to provide a balanced amount of strength and stiffness to pulley assembly 260.
  • Gap 267 is fitted to a complimentary segment of body 210.
  • Annular portion 263 has an outer radius r b s, an inner radius rt,i and a groove depth radius f ⁇ .
  • Groove 264 is a concave groove that serves as the outer race of the bearing of front pulley assembly 260.
  • Each of symmetrical discs 240 has an outer radius of 1 ⁇ 3, an inner radius r c io and a groove depth radius ⁇ 1 .
  • Groove 245 is a concave groove that serves as the inner race of the bearing of front pulley assembly 260. Grooves 245 and 264 serve as the housing of the roller balls of the bearing.
  • Pulley assembly 260 is a separate entity, which provides guide bar 200 elongated life span, with respect to prior art guide bars. Concave groove 245 together with concave groove 264 provide rhombus housing for roller balls 280, whereas each ball 280 touches the slope of concave grooves 245 and 264 at four points (282), altogether.
  • FIG 16 is a perspective view illustration of front pulley assembly 260, wherein one disc is removed for illustrative purposes only, such that roller balls 280 can be viewed being disposed inside concave groove 264.
  • a full row of roller balls 280 is filled in, with appropriate greasing.
  • the size of each roller ball 280 is such that the external radius of roller balls 280 is brought into intimate contact with the surface of concave grooves 245 and 264, thus realizing a closed structure.
  • concave groove 164 When the chain saw is operating, concave groove 164 is static while concave groove 245, being part of pulley discs 240, rotated by the chain, thereby concave groove 245 rolls over roller balls 280 which roll with concave groove 245.
  • roller balls 280, body 262 and discs 240 are treated with hardening procedures to increase their durability to abrasion. While in prior art bearings used in front end sprockets only radial forces are applied to the moving parts (spherical or cylindrical), roller balls 280 of the present invention have both radial and tangential forces applied to, which stabilizes pulley 240 motion.
  • the four-points-bearing has substantially no clearance between balls 280 and concave grooves 245 and 264, and wear force vector 50 applied by the operating chain onto the bearing is applied to nearly half the number of roller balls 280 (and not only on two at the time as in prior art), thereby substantially increasing the life span of roller balls 280.
  • the inner radius (rao) of pulley 240 is substantially sealed, thereby occluding the entrance of abrasive debris and thereby, eliminating the accelerated wear expected in working in such a harsh environment, as in concrete cutting.
  • Figure 18 illustrates a guide bar for power chain saws of guide bar 200, whereas one side of housing body 210 is removed for illustrative purposes only, in a working state.
  • Figure 19 illustrates an exploded view of guide bar 200
  • Figure 20 illustrates guide bar 200 in an intermediate assembly state.
  • Anchoring legs 269 of pulley assembly 260 has gap 267 ( Figure 12) between the two anchoring legs.
  • Housing body 210 includes carrying portion 290 which includes substantially parallel, elongated leading portion 292 and stopper portion 294. Edges 295 of stopper portion 294 are designed to stop inwardly movement of pulley assembly 260 when being assembled and in operating state. Width 297 of elongated leading portion 292 substantially fits the dimension of gap 267.
  • pulley assembly 260 When assembling pulley assembly 260 into housing body 210, pulley assembly 260 is inserted through an opening at front end 212 of housing body 210, wherein the substantially parallel inner edges 268 of anchoring legs 269 slide over edges 298 of elongated leading portion 292, in direction 265. Pulley assembly 260 is pushed into housing body 210 until the ends of the legs of anchoring legs 269 reach edges 295 of stopper portion 294. Preferably end 296 of elongated leading portion 292 is rounded to ease the insertion of pulley assembly 260 onto carrying portion 290 of housing body 210.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Mining & Mineral Resources (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

La présente invention concerne une barre-guide pour scies à chaînes motorisées telles que des scies à chaînes destinées au sciage du béton. En l'occurrence, la barre-guide comprend une poulie antérieure sans dents. Cette barre-guide comporte un support à quatre points et des rainures de piégeage des poussières. Elle est faite de préférence d'un acier austénitique au manganèse résistant à l'usure.
PCT/IL2009/000148 2008-02-10 2009-02-09 Barre-guide pour scies à chaînes motorisées Ceased WO2009098699A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US2746608P 2008-02-10 2008-02-10
US61/027,466 2008-02-10

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WO2009098699A1 true WO2009098699A1 (fr) 2009-08-13

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10040214B2 (en) * 2010-04-16 2018-08-07 Baron Investments Llc Chain bar apparatus and methods and tool combinations and methods of making and using moving tool combinations
US12103199B2 (en) 2019-06-24 2024-10-01 Husqvarna Ab Rotatable cutting chain work tool, a wall saw arrangement comprising such a work tool, an annular member and a method for producing an annular member
EP4464481A1 (fr) * 2023-05-16 2024-11-20 Toolgal - Industrial Diamond Tools Ltd Scie à chaîne à diamant à coupe mince et barre correspondante

Citations (10)

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Publication number Priority date Publication date Assignee Title
US2532981A (en) * 1946-02-09 1950-12-05 E C Atkins And Company Chain saw frame
FR982207A (fr) * 1949-01-17 1951-06-07 Commergnat Guilliet & Cie Soc Perfectionnement aux roulements des chaînes à mortaiser
CA493111A (fr) * 1953-05-26 J. Tweedie Charles Cisailles a barres pour scies articulees
US2693206A (en) * 1952-08-08 1954-11-02 Walter J Anttonen Chain saw with outboard end idler pulley
FR1404825A (fr) * 1963-07-30 1965-07-02 Stihl Maschf Andreas Scie à chaîne à moteur
US3198222A (en) * 1963-06-18 1965-08-03 Torrington Co Idler pulley and end mounting for a chain saw
US4381606A (en) * 1980-03-14 1983-05-03 Santrade Ltd. Chain saw guide bar
US4651424A (en) * 1983-07-28 1987-03-24 Tetsuo Yamada Chain saw guide bar
WO2002033139A1 (fr) * 2000-10-19 2002-04-25 The Frog Switch And Manufacturing Company Moulage d'acier au manganese austenitique a grain raffine presentant des microadditifs de vanadium et de titane et procede de fabrication
US20020112355A1 (en) * 2001-02-16 2002-08-22 Harald Mang Guide bar having rotating guide discs

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA493111A (fr) * 1953-05-26 J. Tweedie Charles Cisailles a barres pour scies articulees
US2532981A (en) * 1946-02-09 1950-12-05 E C Atkins And Company Chain saw frame
FR982207A (fr) * 1949-01-17 1951-06-07 Commergnat Guilliet & Cie Soc Perfectionnement aux roulements des chaînes à mortaiser
US2693206A (en) * 1952-08-08 1954-11-02 Walter J Anttonen Chain saw with outboard end idler pulley
US3198222A (en) * 1963-06-18 1965-08-03 Torrington Co Idler pulley and end mounting for a chain saw
FR1404825A (fr) * 1963-07-30 1965-07-02 Stihl Maschf Andreas Scie à chaîne à moteur
GB1028648A (en) * 1963-07-30 1966-05-04 Stihl Andreas Chain saw
US4381606A (en) * 1980-03-14 1983-05-03 Santrade Ltd. Chain saw guide bar
US4651424A (en) * 1983-07-28 1987-03-24 Tetsuo Yamada Chain saw guide bar
WO2002033139A1 (fr) * 2000-10-19 2002-04-25 The Frog Switch And Manufacturing Company Moulage d'acier au manganese austenitique a grain raffine presentant des microadditifs de vanadium et de titane et procede de fabrication
US20020112355A1 (en) * 2001-02-16 2002-08-22 Harald Mang Guide bar having rotating guide discs

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10040214B2 (en) * 2010-04-16 2018-08-07 Baron Investments Llc Chain bar apparatus and methods and tool combinations and methods of making and using moving tool combinations
US12103199B2 (en) 2019-06-24 2024-10-01 Husqvarna Ab Rotatable cutting chain work tool, a wall saw arrangement comprising such a work tool, an annular member and a method for producing an annular member
EP4464481A1 (fr) * 2023-05-16 2024-11-20 Toolgal - Industrial Diamond Tools Ltd Scie à chaîne à diamant à coupe mince et barre correspondante

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