EP1513391A1 - Rasenmäherdrehmesser - Google Patents

Rasenmäherdrehmesser

Info

Publication number
EP1513391A1
EP1513391A1 EP03752839A EP03752839A EP1513391A1 EP 1513391 A1 EP1513391 A1 EP 1513391A1 EP 03752839 A EP03752839 A EP 03752839A EP 03752839 A EP03752839 A EP 03752839A EP 1513391 A1 EP1513391 A1 EP 1513391A1
Authority
EP
European Patent Office
Prior art keywords
blade
lawn mower
edge
mower blade
plate
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Withdrawn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
EP03752839A
Other languages
English (en)
French (fr)
Inventor
Patrick Besogne
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.)
PBL SA
Original Assignee
PBL SA
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 PBL SA filed Critical PBL SA
Publication of EP1513391A1 publication Critical patent/EP1513391A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/73—Cutting apparatus
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/82—Other details
    • A01D34/826—Noise reduction means

Definitions

  • the present invention relates to a rotary lawn mower blade comprising more particularly means for lowering the noise level.
  • the trailing edges are bevelled on at least one of the raised parts, but preferably on the entire trailing edge.
  • the object of the present invention is to define a particular profile of the mower blade in order to considerably lower the noise level due to the rotation of said blade around its drive axis.
  • the lawn mower blade or the like according to the present invention consists of a plate of elongated rectangular shape and flattened having in its middle a bore bordered on either side of holes allowing its attachment to a rotary drive shaft , said blade comprising a leading edge, a trailing edge and a raised portion located in the vicinity of each end of the blade, while each leading edge and trailing edge has, with respect to a horizontal plane, containing the platinum, a beveled profile which is provided with an inclination ( ⁇ ) between 0 and 30 degrees and in that the beveled profile has an extreme tapered tip whose control thickness d is between 0.1 and 0.5 millimeter .
  • the lawn mower blade or the like according to the present invention comprises an extreme tapered tip whose control thickness d is constant over the entire length of the beveled edge.
  • the lawn mower blade or the like comprises a plate comprising edges which are, relative to a horizontal plane containing said plate, inclined at an angle ( ⁇ ) so as to constitute a blade in the form of a deformed parallelogram .
  • the lawn mower blade or the like comprises a plate comprising edges which are, with respect to a vertical plane intersecting said plate, inclined at an angle ( ⁇ ) so that said edges are directed inside. of the blade.
  • the lawnmower blade or the like according to the present invention comprises a plate comprising at each end a raised part which is more particularly provided at each trailing edge.
  • the lawn mower blade or the like according to the present invention has leading edges comprising on each beveled profile at least one notch.
  • the lawn mower blade or the like according to the present invention has trailing edges comprising on each beveled profile at least one notch.
  • the lawn mower blade or the like according to the present invention comprises a notch comprising a first flank which is inclined at an angle ( ⁇ ) relative to a horizontal plane containing the leading edge and a second flank disposed perpendicular to said edge, said sides being joined to each other by a curved profile.
  • the lawn mower blade or the like according to the present invention comprises a notch, the bottom of which with a curved profile is designed to be placed at a certain distance a from the horizontal axis of the plate.
  • the lawn mower blade or the like according to the present invention has trailing edges comprising on each raised part a notch having an inclined side.
  • the lawn mower blade or the like according to the present invention comprises at its trailing edge and more particularly between its central bore and its raised part a beveled edge with corrugated profile constituted by other raised parts of different length and height .
  • the lawn mower blade or the like according to the present invention comprises a raised part whose inclination is variable or increasing from the trailing edge to the center of the plate.
  • Figure 1 is a top view illustrating the mower blade according to the present invention.
  • Figure 2 is a side view showing the profile of the mower blade according to the present invention.
  • Figures 3a and 3b are sectional views showing the inclination of the leading and trailing edges of the mower blade according to the present invention.
  • Figures 4 and 5 are views illustrating a first variant of the mower blade according to the present invention.
  • FIGS. 1, 2, 3a and 3b have shown a mower blade 1 which consists of a plate 2 of elongated rectangular shape and flattened.
  • the plate 2 has in its middle a bore 3 and on either side of the latter two other holes 4 allowing its attachment to a drive shaft of a mower not shown.
  • the axis of the bore 3 which is arranged perpendicular to the plane of the plate 2 merges with the axis of the drive shaft of the mower motor and constitutes an axis of symmetry for the blade.
  • the blade 1 comprises on each side an edge 5 which has a continuous bevelled profile 6 in order to constitute for each side and as a function of the direction of rotation F of said blade a leading edge 7 and a trailing edge 8. Also, the blade 1 has on each side and at the end of the edge 5, a raised portion 9 which is more particularly provided at each trailing edge 8.
  • each edge 5 of the blade 1 forms half of the plate 2 the leading edge 7, and the other half the trailing edge 8.
  • beveled profile 6 of the leading edge 7 also and continuously constitutes the beveled profile of the trailing edge 8 of each edge 5 of the blade 1.
  • the continuous bevelled profile 6 of the leading edge 7 and the trailing edge 8 forms, for each edge 5, the cutting part of the blade 1.
  • each leading edge 7 and trailing edge 8 has, with respect to a horizontal plane containing the plate 2, an inclination ⁇ between 0 and 30 degrees.
  • the continuous beveled profile 6 has, for each leading edge 7 and trailing edge 8, an extreme tapered tip 10 whose control thickness d is between 0.1 and 0.5 millimeter.
  • This thickness of the tapered tip 10 is constant over the entire length of the beveled edge 6 of the blade 1.
  • the plate 2 has, at each end opposite edges 11 and 12 which are shorter than those 5 with beveled profile 6.
  • the plate 2 has edges 11 and 12 which are, relative to a horizontal plane containing the said plate, inclined at an angle ⁇ so as to constitute a blade 1 in the form of a deformed parallelogram.
  • the plate 2 has edges 11 and 12 which are, relative to a vertical plane intersecting said plate, inclined at an angle ⁇ so that said edges are directed inside the blade 1. It is noted that the continuous beveled profile 6 of the leading edges 7 and trailing 8, that the thickness d of the tapered tip 10 and that the inclinations of the edges 11 and 12 of the blade 1 contribute to a significant reduction in noise when the latter is rotated.
  • FIG. 4 shows the mower blade 1 according to the present invention comprising on each side an edge 5 which has a bevelled profile 6 so as to constitute for each side and as a function of the direction of rotation F of said blade a leading edge 7 and a trailing edge 8.
  • the bevelled profile 6 comprises at each leading edge 7 a notch 13 penetrating inside the plate 2 of the mower blade 1.
  • the notch 13 has a first flank 14 which is inclined at an angle ⁇ relative to a horizontal plane containing the leading edge 7 and a second flank 15 disposed perpendicular to said edge.
  • the two sides 14 and 15 are joined to one another by a curved profile 16.
  • each notch 13 is inclined in the direction of the edge 11, 12 lying nearby, so as to present the opening of the notch in the direction of rotation F of the mower blade 1.
  • the bottom of the notch 13 formed by the curved profile 16 is designed to be disposed at a certain distance a from the horizontal axis of the plate 2.
  • FIG. 5 shows the mower blade 1 according to the present invention comprising on each side an edge 5 which has a bevelled profile 6 so as to constitute, for each side and according to the direction of rotation F of said blade, an edge d attack 7 and a trailing edge 8.
  • the beveled profile 6 comprises at the trailing edge 8 and more particularly on each raised part 9 a notch 17 penetrating inside the plate 2 of the mower blade 1. Also the notch 17 has a profile similar to that 13 described above and more particularly an inclined flank 18 directed towards the edges 11, 12 being in the immediate vicinity of the notch.
  • the mower blade 1 according to the present invention has a discontinuous beveled edge 6 due to the notches 13 and 17 arranged either on the leading edge 7 or on the trailing edge 8.
  • FIGS. 6 and 7 show the mower blade 1 according to the present invention comprising on each side an edge 5 which has a bevelled profile 6 so as to constitute, for each side and according to the direction of rotation F of said blade, a leading edge 7 and a trailing edge 8.
  • the mower blade 1 has at its trailing edge 8 and more particularly between its central bore 3 and its raised part 9 a beveled edge 6 with a wavy profile.
  • the beveled edge 6 comprises, from the raised part 9 and up to the middle of the plate 2, other raised parts 19, 20 of different length and height.
  • central bore 3 of the mower blade 1 may have a star profile.
  • the mower blade 1 according to the present invention may comprise a raised part 9 whose inclination is variable or increasing from the trailing edge 8 to the center of the plate 2.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Harvester Elements (AREA)
EP03752839A 2002-05-21 2003-05-20 Rasenmäherdrehmesser Withdrawn EP1513391A1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0206164A FR2839848B1 (fr) 2002-05-21 2002-05-21 Lame de tondeuse a gazon rotative
FR0206164 2002-05-21
PCT/FR2003/001519 WO2003096786A1 (fr) 2002-05-21 2003-05-20 Lame de tondeuse a gazon rotative

Publications (1)

Publication Number Publication Date
EP1513391A1 true EP1513391A1 (de) 2005-03-16

Family

ID=29414942

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03752839A Withdrawn EP1513391A1 (de) 2002-05-21 2003-05-20 Rasenmäherdrehmesser

Country Status (6)

Country Link
US (1) US20050172601A1 (de)
EP (1) EP1513391A1 (de)
AU (1) AU2003255586A1 (de)
CA (1) CA2485410A1 (de)
FR (1) FR2839848B1 (de)
WO (1) WO2003096786A1 (de)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2865610B1 (fr) * 2004-01-30 2006-07-07 Simcoo Lame de tondeuse a gazon rotative, aerodynamique, pour tondeuse a gazon equipes d'un moteur thermique ou electrique
US20060168933A1 (en) * 2005-02-01 2006-08-03 Hill Robert G Jr Blade for rotary cutting machine
US7299612B2 (en) * 2006-03-30 2007-11-27 John Schuyler Rotary mower blade
US20110277438A1 (en) * 2010-04-15 2011-11-17 Perruso Jr Anthony P Lawn Mower Blade
EP2848148B1 (de) 2011-09-29 2016-11-23 Husqvarna AB Schnellwechsel-Messersystem
US9844176B2 (en) * 2012-10-22 2017-12-19 Fournier And Grande Trust Weed trimmer extension device
JP6141025B2 (ja) 2013-01-15 2017-06-07 株式会社クボタ モーアのカッターブレード及びモーア
US20150052868A1 (en) * 2013-08-20 2015-02-26 Ariens Company Lawn mower including reduced turbulence cutting blades
JP6151659B2 (ja) * 2014-03-27 2017-06-21 本田技研工業株式会社 芝刈機
USD758456S1 (en) * 2015-01-02 2016-06-07 Husqvarna Ab Mulching blade
USD766332S1 (en) 2015-01-02 2016-09-13 Husqvarna Ab Bagging blade
CA2973687C (en) 2015-01-12 2019-11-12 Husqvarna Ab Cutting deck flow control assembly
USD781927S1 (en) 2015-11-06 2017-03-21 Husqvarna Ab Mower blade
USD786310S1 (en) 2015-11-06 2017-05-09 Husqvarna Ab Mower blade
USD902262S1 (en) * 2019-05-14 2020-11-17 Delbert Hoover Lawn mower blade with hooked edge
JP7390947B2 (ja) * 2020-03-23 2023-12-04 本田技研工業株式会社 芝刈機
CN113939185A (zh) * 2020-03-26 2022-01-14 胡斯华纳有限公司 高效割草机刀片
USD1008317S1 (en) 2021-04-15 2023-12-19 Trimax Mowing Systems Nz Limited Cutting blade for a mowing system

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2751737A (en) * 1953-09-25 1956-06-26 Henderson B Herod Disc type mowing apparatus having pivoted blades
US3022621A (en) * 1959-08-19 1962-02-27 Zavarella Salvatore Blade for rotary cutter
US3214896A (en) * 1964-09-18 1965-11-02 William B Watkins Rotary cutter blade
DE7834512U1 (de) * 1978-11-20 1979-03-29 Goebler, Hans, 5231 Woldert Horizontalmesser für Rasenmäher Göbler, Hans, 5231 Woldert
AT372569B (de) * 1981-06-09 1983-10-25 Ver Edelstahlwerke Ag Messer fuer rasenmaeher
FR2510345A1 (fr) * 1981-08-03 1983-02-04 Wolf Outils Perfectionnements aux lames de coupe de tondeuses a gazon a lames tournantes
US4426831A (en) * 1982-03-08 1984-01-24 Simplicity Manufacturing, Inc. Mower blade
DE8531758U1 (de) * 1985-11-09 1986-01-30 Böhler AG, 4000 Düsseldorf Messer für Rasenmäher
FR2611422A1 (fr) * 1987-03-05 1988-09-09 Margerides Sa Forges Lame de tondeuse a gazon rotative comportant des moyens d'abaissement du niveau sonore
GB8717572D0 (en) * 1987-07-24 1987-09-03 Flymo Ltd Rotary lawn mower
GB2215176B (en) * 1988-02-15 1992-09-16 Barrus E P Ltd Lawnmower
US4995228A (en) * 1990-04-30 1991-02-26 Hladik Jr Joseph C Cutting blade for rotary cutting machinery
US5163276A (en) * 1991-09-27 1992-11-17 Mohrman John H Multi-purpose attachments for power lawn mower blades
US5284006A (en) * 1992-06-11 1994-02-08 White Consolidated Industries, Inc. Combination mower blade
JP2632482B2 (ja) * 1992-11-30 1997-07-23 本田技研工業株式会社 芝刈機のブレード
US5327710A (en) * 1993-01-14 1994-07-12 Mtd Products Inc. Multi-purpose mowing blade for discharge, bagging, and mulching
DE29809047U1 (de) * 1998-05-19 1998-08-20 Pfeiffer, Helmut, 35428 Langgöns Kraftsparschneidwerkzeug für motorisch angetriebene Rasenmäher

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03096786A1 *

Also Published As

Publication number Publication date
WO2003096786A1 (fr) 2003-11-27
US20050172601A1 (en) 2005-08-11
FR2839848B1 (fr) 2004-12-03
CA2485410A1 (fr) 2003-11-27
AU2003255586A1 (en) 2003-12-02
FR2839848A1 (fr) 2003-11-28

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