EP0231110A2 - Lames de scie - Google Patents

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Publication number
EP0231110A2
EP0231110A2 EP87300597A EP87300597A EP0231110A2 EP 0231110 A2 EP0231110 A2 EP 0231110A2 EP 87300597 A EP87300597 A EP 87300597A EP 87300597 A EP87300597 A EP 87300597A EP 0231110 A2 EP0231110 A2 EP 0231110A2
Authority
EP
European Patent Office
Prior art keywords
teeth
saw
saw blade
cut
blade
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Withdrawn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
EP87300597A
Other languages
German (de)
English (en)
Other versions
EP0231110A3 (fr
Inventor
Tai-Her Yang
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
Application filed by Individual filed Critical Individual
Publication of EP0231110A2 publication Critical patent/EP0231110A2/fr
Publication of EP0231110A3 publication Critical patent/EP0231110A3/fr
Withdrawn legal-status Critical Current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
    • B23D61/021—Types of set; Variable teeth, e.g. variable in height or gullet depth; Varying pitch; Details of gullet
    • 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
    • B23D61/12—Straight saw blades; Strap saw blades
    • B23D61/121—Types of set; Variable teeth, e.g. variable in height or gullet depth; Varying pitch; Details of gullet

Definitions

  • This invention relates to saw blades and is particularly, but not exclusively concerned with saw blades for use in cutting through wooden workpieces.
  • Materials such as wood have a grain which is formed by substantially aligned tough fibres forming the grain.
  • the fibres which are formed from a tough organic material known as ligmin, are held together relatively weakly. Accordingly, cutting a wooden workpiece transverse to the direction of the grain which involves cutting through the tough fibres is more difficult than cutting with the grain which involves parting the fibres.
  • a worker wishing to cut a wooden workpiece both transversely and with the grain had had to use two separate saws each having different teeth arrangements, namely a cross-cut saw and a rip saw.
  • the use of two different saws for the reason stated is not only a time consuming disadvantage but also requires a woodworker to constantly adjust his sense of balance and feel when using the different saws.
  • GB1,117,908 discloses a circular saw blade comprising spaced groups of neutral teeth (i.e adapted to cut when the blade i.s driven in either direction) of constant pitch separated by tooth groups each comprising first and second teeth adapted to cut when the blade is rotatably driven in alternate directions.
  • GB1,086,152 (Herman and Savage) discloses a folding saw having a cutting edge and possessing a similar arrangement of cutting teeth to that described in GB1,117,908.
  • GB707,727 discloses a sai blade comprising consecutive groups of two neutral dust grinding (raker) teeth between two opposed cutting teeth of the same pitch.
  • GB522,283 discloses a saw blade including a series of main tooth groups each group comprising first and second opposed pairs of teeth adapted to cut when the blade is driven in opposite directions and separated by pairs of raker teeth having a smaller pitch.
  • GB433,260 (Campbell) discloses a double handed cross cut saw having a cutting edge comprising opposed groups of cutting teeth, which gradually reduce in pitch towards the respective ends of the blade and considered with respect to a central pair of raker teeth.
  • GB236,099 discloses a saw blade having a series of groups of major teeth, separated by deep debris clearing slots, each group comprising two pairs of oppositely-inclined teeth of constant pitch.
  • a saw blade comprising spaced faces and a cutting edge in which the cutting edge comprises groups of cutting teeth in which each group comprises at least one major tooth, the major tooth being of greater height than neighbouring teeth of the same group and adapted to cut when the blade is moved in a direction opposite from the cutting direction of, the other teeth in the group.
  • the circular saw blade 10 shown in Fig. 1 comprises spaced flat faces 12 and 14 (14 obscured), and a toothed edge 16, having spaced groups of teeth eg 18.
  • the groups of teeth are separated by saw-dust clearance slots, eg 19.
  • the blade 10 is drivably mounted on, for example, the drive shaft of a circular saw which is passed through a central circular aperture 18.
  • Group 19 comprises a large-pitch cutting tooth 22 on a leading edge of the group which is adapted to cut when the blade is driven in a clockwise direction; and five smaller teeth eg 24 of equal pitch, extending toward the opposite end of the group, which are adapted to cut when the blade is driven in the opposite direction.
  • the smaller pitch teeth are of equal pitch it is envisaged that teeth of varied pitch may be substituted therefor.
  • the saw blade 10 is drivably mounted on the drive shaft of a circular saw.
  • the blade In order to cut a wooden workpiece along its grain and then across the grain the blade is first driven at highspeed to cut the workpiece with the large pitch teeth eg 22. Then, to cut the wood across the grain the blade is driven at high speed in the opposite direction, i.e. anticlockwise, to cut the wood across the grain with the smaller pitch teeth 24.
  • the blade may be demounted from the drive shaft and replaced facing in the opposite direction whereby when the shaft is rotated the blade will turn in the opposite direction.
  • the circular saw may be provided with a switching device which allows the drive shaft to be driven in different directions thus avoiding the need to demount the blade from the drive shaft.
  • the hand saw 30 shown in Fig. 2 has a similar cutting edge 31, to that described for the saw blade 10 in that it comprises'spaced groups of teeth eg. 32, divided by saw-dust clearance notches eg 33.
  • Each group of teeth comprises a tooth 34 of greater height on a leading edge of the group and four smaller teeth eg 36 extending to the other end of the group.
  • the large pitch tooth 34 is adapted to cut when the blade is drawn in the direction of the arrow A, and the smaller pitch teeth are adapted to cut when the blade is drawn in the direction of arrow B, i.e. in the opposite direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dovetailed Work, And Nailing Machines And Stapling Machines For Wood (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Sawing (AREA)
EP87300597A 1986-01-23 1987-01-23 Lames de scie Withdrawn EP0231110A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB868601656A GB8601656D0 (en) 1986-01-23 1986-01-23 Saw blade
GB8601656 1986-01-23

Publications (2)

Publication Number Publication Date
EP0231110A2 true EP0231110A2 (fr) 1987-08-05
EP0231110A3 EP0231110A3 (fr) 1989-05-24

Family

ID=10591836

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87300597A Withdrawn EP0231110A3 (fr) 1986-01-23 1987-01-23 Lames de scie

Country Status (2)

Country Link
EP (1) EP0231110A3 (fr)
GB (1) GB8601656D0 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2387350A (en) * 2003-03-07 2003-10-15 Howard George Osborne Improved saw blade
EP1671733A2 (fr) * 2004-12-17 2006-06-21 Irwin Industrial Tools GmbH Lame de scie et scie à main
WO2011060978A1 (fr) 2009-11-20 2011-05-26 Robert Bosch Gmbh Scie pour machine-outil
DE102012014495A1 (de) * 2012-07-20 2014-01-23 Bernd Bent Sägeblatt
WO2022240278A1 (fr) * 2021-05-13 2022-11-17 Gomez Fregoso Alejandro Couteau circulaire et équipement pour couper des tubes de glace

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1359216A (en) * 1919-10-11 1920-11-16 Henry Disston & Sons Inc Model for setting and filing saws
GB236099A (en) * 1924-11-28 1925-07-02 Frank Godfrey Mattson Improvements in saws
GB240081A (en) * 1925-04-06 1925-09-24 Donald Campbell Improvements in and relating to saws
US1876945A (en) * 1931-10-15 1932-09-13 Edward G Swartz Saw
GB423260A (en) * 1933-10-17 1935-01-29 Donald Campbell Improvements in cross-cut saws
GB522283A (en) * 1938-03-24 1940-06-13 Jonas Leander Owen Improvements in or relating to saw blades
GB707727A (en) * 1952-09-25 1954-04-21 Lars Helmer Jonsson Saw blade
US2741279A (en) * 1952-10-31 1956-04-10 Robert O Bormann Combination wood and metal saw blade
GB1086152A (en) * 1964-01-22 1967-10-04 Albert Richard Herman A folding saw
GB1117908A (en) * 1966-06-13 1968-06-26 Stanley Works Circular saw blade
DE3327895A1 (de) * 1983-08-02 1985-02-21 Toshio Miki Hyogo Aono Drehbares schneidwerkzeug mit saegezaehnen

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1359216A (en) * 1919-10-11 1920-11-16 Henry Disston & Sons Inc Model for setting and filing saws
GB236099A (en) * 1924-11-28 1925-07-02 Frank Godfrey Mattson Improvements in saws
GB240081A (en) * 1925-04-06 1925-09-24 Donald Campbell Improvements in and relating to saws
US1876945A (en) * 1931-10-15 1932-09-13 Edward G Swartz Saw
GB423260A (en) * 1933-10-17 1935-01-29 Donald Campbell Improvements in cross-cut saws
GB522283A (en) * 1938-03-24 1940-06-13 Jonas Leander Owen Improvements in or relating to saw blades
GB707727A (en) * 1952-09-25 1954-04-21 Lars Helmer Jonsson Saw blade
US2741279A (en) * 1952-10-31 1956-04-10 Robert O Bormann Combination wood and metal saw blade
GB1086152A (en) * 1964-01-22 1967-10-04 Albert Richard Herman A folding saw
GB1117908A (en) * 1966-06-13 1968-06-26 Stanley Works Circular saw blade
DE3327895A1 (de) * 1983-08-02 1985-02-21 Toshio Miki Hyogo Aono Drehbares schneidwerkzeug mit saegezaehnen

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2387350A (en) * 2003-03-07 2003-10-15 Howard George Osborne Improved saw blade
GB2387350B (en) * 2003-03-07 2005-03-30 Howard George Osborne Improved saw blade
EP1671733A2 (fr) * 2004-12-17 2006-06-21 Irwin Industrial Tools GmbH Lame de scie et scie à main
EP1671733A3 (fr) * 2004-12-17 2006-06-28 Irwin Industrial Tools GmbH Lame de scie et scie à main
AU2005244598B2 (en) * 2004-12-17 2011-03-24 Irwin Industrial Tools Gmbh A saw blade and handsaw
WO2011060978A1 (fr) 2009-11-20 2011-05-26 Robert Bosch Gmbh Scie pour machine-outil
CN102665987A (zh) * 2009-11-20 2012-09-12 罗伯特·博世有限公司 用于工具机的锯割工具
JP2013511395A (ja) * 2009-11-20 2013-04-04 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング 工作機械用の鋸工具
DE102012014495A1 (de) * 2012-07-20 2014-01-23 Bernd Bent Sägeblatt
WO2022240278A1 (fr) * 2021-05-13 2022-11-17 Gomez Fregoso Alejandro Couteau circulaire et équipement pour couper des tubes de glace

Also Published As

Publication number Publication date
GB8601656D0 (en) 1986-02-26
EP0231110A3 (fr) 1989-05-24

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