EP0387429A1 - Kreissägeblatt, in dem eine Sägekette die Schneidelemente bildet - Google Patents

Kreissägeblatt, in dem eine Sägekette die Schneidelemente bildet Download PDF

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Publication number
EP0387429A1
EP0387429A1 EP89302433A EP89302433A EP0387429A1 EP 0387429 A1 EP0387429 A1 EP 0387429A1 EP 89302433 A EP89302433 A EP 89302433A EP 89302433 A EP89302433 A EP 89302433A EP 0387429 A1 EP0387429 A1 EP 0387429A1
Authority
EP
European Patent Office
Prior art keywords
links
disc
chain
anchor
gullies
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
EP89302433A
Other languages
English (en)
French (fr)
Other versions
EP0387429B1 (de
Inventor
Raymond R. Carlton
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.)
Individual
Original Assignee
Individual
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
Priority to CA000593189A priority Critical patent/CA1319082C/en
Application filed by Individual filed Critical Individual
Priority to EP19890302433 priority patent/EP0387429B1/de
Priority to DE1989612107 priority patent/DE68912107T2/de
Priority to AU31410/89A priority patent/AU606273B2/en
Publication of EP0387429A1 publication Critical patent/EP0387429A1/de
Application granted granted Critical
Publication of EP0387429B1 publication Critical patent/EP0387429B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
    • B23D61/02—Circular saw blades
    • B23D61/025—Details of saw blade body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
    • B23D61/02—Circular saw blades
    • B23D61/04—Circular saw blades with inserted saw teeth, i.e. the teeth being individually inserted
    • B23D61/06—Circular saw blades with inserted saw teeth, i.e. the teeth being individually inserted in exchangeable arrangement

Definitions

  • the instant invention relates to circular cutting blades, and particularly to a circular cutting blade which utilizes a chain having cutter links therein serving as cutters in the blade.
  • Circular saw blades of the type disclosed herein are used in connection with hand-held power saws and also with brush or light timber harvesting equipment.
  • the blade is mounted on a motor driven arbor which is rotated at relatively high speed to cause the blade to cut material, generally wood.
  • a number of circular saw blade assemblies utilizing chain-type cutters are known.
  • One such blade is disclosed in U.S. Patent No. 4,627,322 to Hayhurst, Jr., which utilizes a pair of discs which sandwich a portion of a saw chain about the periphery of the disc.
  • Other blades utilize a circular disc having chain-saw type cutter links mounted about the periphery thereof, as by rivets or other fasteners securing the links to the disc.
  • each blade encounters difficulties when used in extremely heavy brush or on hard materials.
  • the chain portion is free to rotate about the disc, as there is no provision to engage the driving or anchor links on the saw chain.
  • slippage increases as the chain is driven by the disc.
  • the cutting teeth must be individually removed and replaced in the event that one of them becomes damaged, as is frequently the case when the blade is used as a brush cutter wherein it engages rocks rather than brush.
  • the invention of the application includes a cutting chain having links therein, including anchor links and cutter links.
  • Each anchor link has an anchor portion which extends to one side of the chain.
  • Opposed side links join the anchor links.
  • Certain of the side links are cutter links.
  • a disc having alternating sprocket teeth and gullies extending about the periphery thereof is provided. The chain is secured about the periphery of the disc with the anchor portions received in the gullies. Side links in the chain straddle the sprocket teeth and serve to hold the chain from lateral displacement on the disc.
  • Embodiments of the invention provide a cutting blade wherein anchor portions of a cutting chain are positively engaged by the disc on which the cutting chain is carried. Typically, these anchor portions can seat within gullies provided in the disc.
  • Such a cutting blade prefferably has side links in a cutting chain that straddle sprocket teeth in the disc mounting the chain.
  • the cutting chain may be easily removed and replaced, and may be carried on a single disc.
  • a circular cutting blade comprising a cutting chain having links, including anchor links and cutter links, each anchor link having an anchor portion extending to one side of the chain, and a disc having alternating sprocket teeth and gullies extending about the periphery thereof, wherein the chain is secured about the periphery of said disc with the anchor portions received in said gullies.
  • Blade 10 includes a disc 12 which has a generally circular outline, and which has an arbor receiving bore 14 located at the center thereof. Bore 14 is operable to receive a motor-driven arbor therein which secures disc 12 to a power unit which is operable to drive the disc.
  • Disc 12 has an arrangement of alternating sprocket teeth and gullies arranged about the periphery thereof.
  • the sprocket teeth are shown at 16, and the gullies are shown at 18.
  • teeth 16 and gullies 18 are symmetrical about lines 20, 22, respectively, which extend outwardly from the center 23 of the disc.
  • Disc 12 is formed of a single sheet of material, such as steel, and is therefore easy to manufacture and of relatively light weight.
  • a cutting chain 24 is disposed about the periphery of disc 12.
  • Chain 24 is formed of a series of links which are joined together by pins, in the manner of well-known saw chains.
  • chain 24 includes center, or anchor, links 26 with anchor portions 28 extending downwardly in the links.
  • Interconnecting the center links are opposed side links 30, certain of these side links being cutter links 32 such as shown at 32A and 32B.
  • Interconnecting sets of side links with the center links are pins 34 extending through accommodating bores made in the links.
  • the cutter links may be similar to cutter links found in conventional saw chain and include, as shown by link 32B in Fig. 2, a body portion 36 from which projects at the forward part thereof a depth gauge 38 and from which projects at the rear part thereof a cutting tooth or cutter 40.
  • the cutter and depth gauge are separated by a gullet 42.
  • the cutter links include left and right hand cutter links interspersed with each other extending along the links of the chain, exemplified by left-hand cutter link 32A which is present on the left side of the chain facing the direction of the chains cutting action and right-hand cutter link 32B which is on the right side of the chain facing the cutting action of the chain.
  • the cutting chain is mounted on and extends as a continuous chain circumferentially about the periphery of disc 12.
  • the chain may be dismounted from disc 12 by removing a pin 34.
  • a new chain may be mounted by extending the disc and securing the free ends with an appropriate pin.
  • a chain having an anti-kickback construction may be employed such as the saw chain described in U.S. Patent No. 4,425,830. Whatever the type of chain employed, the chain after installation on the disc the chain becomes in effect a unified part of the entire cutting blade assembly.
  • an open space 44 In the chain and between successive center links is an open space 44. This space is bounded on opposite sides by the opposed side links which join the two center links. With the chain mounted in place, sprocket teeth 16 extend into these open spaces and each pair of opposed side links become positioned with such straddling a sprocket tooth. Anchor portions 28 become seated within gullies 18 of disc 12. In this way there is a positive driving engagement between the disc and chain. The side links by straddling the sprocket teeth serve to hold the chain from lateral displacement on the disc. With this organization, a disc in the form of a single plate may be used to support and propel the chain during the cutting operation. The provision of only a single plate as a disc provides an extremely lightweight cutting blade.
  • cutting tooth 40 of link 32A extends to one side of disc 12 well beyond the thickness of the disc.
  • the cutting tooth of the link of the opposite hand, link 32B extends a like distance to the other side of the disc. This arrangement provides that chain 24 makes a cut having a kerf significantly thicker than the thickness of disc 12, thereby allowing free passage of the disc through the cut material.
  • a cutting blade 60 is provided which includes a disc 62, formed substantially like disc 12, and a chain 64 which is formed similarly to chain 24.
  • a pair of side plates 66, 68 is provided, one being on each side of disc 62, and these side plates have peripheral margins that extend at least partially over gullies 18 thus to overlap the anchor portions of the chain, thereby preventing the influx of debris into the region of the gullies and anchor portions, and also to inhibit lateral shifting of the chain. Edges of the side plates underlie the side links.
  • Side plates 66, 68 are secured to disc 62 as by welds 70, or the side plates may be secured by other suitable fasteners.
  • Side plates 66, 68 have a thickness approximating that of chain side links 30.
  • the addition of the side plates still provides a structure having a thickness less than the kerf formed by the cutters on chain 64.
  • This form of the invention is particularly well suited for the harvesting of larger timber, as the side plates add additional stiffness to the cutting blade.
  • the cutting blade illustrated includes a disc, partially shown at 70, which, like disc 12, has a generally circular outline, and further has an arbor-receiving bore located at the center thereof (not shown). Alternating sprocket teeth 72 and gullies 74 appear about the periphery of the disc.
  • a cutting chain 76 is mounted about the periphery of disc 70.
  • the chain includes center or anchor links 78 with depending anchor portions 78 a , and opposed side links interconnecting these anchor links, as exemplified by the side links 80, which are tie-strap links, and side links 82, which are cutter links. Interconnecting sets of side links with a center link are pins 84.
  • disc 70 is cut away at one side of each sprocket tooth whereby a catch portion 86 is defined in the form of a projection which projects from the tooth in a direction extending circumferentially of disc 70, or in a direction extending the length of the chain which is mounted about the disc.
  • Each anchor portion 78 a of an anchor link is shaped to have a catch portion 88 defined at one side in the form of a projection which projects outwardly from the anchor portion in the direction of the length of the chain.
  • each anchor link With the chain mounted in place, each anchor link is mounted with its anchor portion residing in a gully, and with catch portion 88 of the link underlying catch portion 86 which is part of a sprocket tooth.
  • the structure described includes means interconnecting the anchor links and the disc preventing radially outward displacement of the anchor links. This means, more specifically, comprises interengaging catch portions on the anchor portions of a link and on a sprocket tooth, respectively.
  • a cutting blade which provides for the carrying of a cutting chain on a disc which is operable to propel the chain and retain the chain thereon.
  • the disc may be a single layer structure or may be equipped with side plates. Alternating sprocket teeth and gullies are arranged about the periphery of the disc wherein anchor portions of a cutting chain are received in the gullies and the sprocket teeth project in between the links in the chain.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sawing (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
EP19890302433 1989-03-13 1989-03-13 Kreissägeblatt, in dem eine Sägekette die Schneidelemente bildet Expired - Lifetime EP0387429B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CA000593189A CA1319082C (en) 1989-03-13 1989-03-09 Circular saw blade with saw chain providing cutters
EP19890302433 EP0387429B1 (de) 1989-03-13 1989-03-13 Kreissägeblatt, in dem eine Sägekette die Schneidelemente bildet
DE1989612107 DE68912107T2 (de) 1989-03-13 1989-03-13 Kreissägeblatt, in dem eine Sägekette die Schneidelemente bildet.
AU31410/89A AU606273B2 (en) 1989-03-13 1989-03-16 Circular saw blade with saw chain providing cutters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19890302433 EP0387429B1 (de) 1989-03-13 1989-03-13 Kreissägeblatt, in dem eine Sägekette die Schneidelemente bildet

Publications (2)

Publication Number Publication Date
EP0387429A1 true EP0387429A1 (de) 1990-09-19
EP0387429B1 EP0387429B1 (de) 1994-01-05

Family

ID=8202617

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890302433 Expired - Lifetime EP0387429B1 (de) 1989-03-13 1989-03-13 Kreissägeblatt, in dem eine Sägekette die Schneidelemente bildet

Country Status (4)

Country Link
EP (1) EP0387429B1 (de)
AU (1) AU606273B2 (de)
CA (1) CA1319082C (de)
DE (1) DE68912107T2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005037502A1 (en) * 2003-10-20 2005-04-28 Gärdstafräsen Hb Disc saw blade

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR932037A (fr) * 1945-07-17 1948-03-10 Impregnated Diamond Prod Ltd Scie circulaire
US2958348A (en) * 1959-03-31 1960-11-01 Irvington Machine Works Inc Circular saw
DE3230530A1 (de) * 1981-09-14 1983-03-24 Carlton Co., Milwaukie, Oreg. Saegekette fuer eine kettensaege
US4627322A (en) * 1985-09-17 1986-12-09 Lebever Co. Circular saw blade assembly
US4641432A (en) * 1983-02-16 1987-02-10 Suehiro Seiko Kabushiki Kaisha Chain saw guide bar and method of construction
DE3640857A1 (de) * 1986-11-29 1988-06-09 Stihl Maschf Andreas Motorkettensaege

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR932037A (fr) * 1945-07-17 1948-03-10 Impregnated Diamond Prod Ltd Scie circulaire
US2958348A (en) * 1959-03-31 1960-11-01 Irvington Machine Works Inc Circular saw
DE3230530A1 (de) * 1981-09-14 1983-03-24 Carlton Co., Milwaukie, Oreg. Saegekette fuer eine kettensaege
US4641432A (en) * 1983-02-16 1987-02-10 Suehiro Seiko Kabushiki Kaisha Chain saw guide bar and method of construction
US4627322A (en) * 1985-09-17 1986-12-09 Lebever Co. Circular saw blade assembly
DE3640857A1 (de) * 1986-11-29 1988-06-09 Stihl Maschf Andreas Motorkettensaege

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005037502A1 (en) * 2003-10-20 2005-04-28 Gärdstafräsen Hb Disc saw blade
US7775144B2 (en) 2003-10-20 2010-08-17 Bracke Forest Ab Disc saw blade

Also Published As

Publication number Publication date
AU606273B2 (en) 1991-01-31
EP0387429B1 (de) 1994-01-05
AU3141089A (en) 1990-09-27
CA1319082C (en) 1993-06-15
DE68912107T2 (de) 1994-06-01
DE68912107D1 (de) 1994-02-17

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