US3811232A - Knife edge grinder for rotary reel type cutter head - Google Patents

Knife edge grinder for rotary reel type cutter head Download PDF

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Publication number
US3811232A
US3811232A US00270410A US27041072A US3811232A US 3811232 A US3811232 A US 3811232A US 00270410 A US00270410 A US 00270410A US 27041072 A US27041072 A US 27041072A US 3811232 A US3811232 A US 3811232A
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United States
Prior art keywords
cutter head
lever arm
indexing
shaft
grinding
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.)
Expired - Lifetime
Application number
US00270410A
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English (en)
Inventor
F Reuter
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.)
MASSEY COMBINES Corp A CORP OF ONTARIO
Original Assignee
Massey Ferguson Inc
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 Massey Ferguson Inc filed Critical Massey Ferguson Inc
Priority to US00270410A priority Critical patent/US3811232A/en
Priority to CA173,342A priority patent/CA988718A/en
Priority to ZA733893A priority patent/ZA733893B/xx
Priority to AU56779/73A priority patent/AU463002B2/en
Priority to AR248820A priority patent/AR198317A1/es
Priority to GB3269673A priority patent/GB1432873A/en
Priority to FR7325060A priority patent/FR2192477A5/fr
Application granted granted Critical
Publication of US3811232A publication Critical patent/US3811232A/en
Assigned to J. HENRY SCHRODER BANK & TRUST COMPANY, A NEW YORK BANKING INSTITUTION AS TRUSTEE, SIEVERS, GEORGE R., AS INDIVIDUAL TRUSTEE reassignment J. HENRY SCHRODER BANK & TRUST COMPANY, A NEW YORK BANKING INSTITUTION AS TRUSTEE SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MASSEY-FERGUSON, INC.
Assigned to NATIONAL TRUST COMPANY, AN ONTARIO TRUST COMPANY, SIEVERS, GEORGE R., J. HENRY SCHRODER BANK & TRUST COMPANY, A NEW YORK BANKING INSTITUTION reassignment NATIONAL TRUST COMPANY, AN ONTARIO TRUST COMPANY MORTGAGE (SEE DOCUMENT FOR DETAILS). Assignors: MASSEY COMBINES CORPORATION, AN ONTARIO CORPORATION
Assigned to SIEVERS, GEORGE R., AS TRUSTEE reassignment SIEVERS, GEORGE R., AS TRUSTEE SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MASSEY COMBINES CORPORATION, AN ONTARIO CORP.
Assigned to MASSEY COMBINES CORPORATION, A CORP. OF ONTARIO reassignment MASSEY COMBINES CORPORATION, A CORP. OF ONTARIO ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: MASSEY-FERGUSON INC., A CORP. OF MD.
Assigned to MASSEY COMBINES CORPORATION reassignment MASSEY COMBINES CORPORATION RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). SECURITY AGREEMENT RECORDED AT REEL 4579 FRAME 537. Assignors: IBJ SCHRODER BANK & TRUST COMPANY, SIEVERS, GEORGE R., TRUSTEES
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • A01D34/42—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a horizontal axis, e.g. cutting-cylinders
    • A01D34/62—Other details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/36—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades
    • B24B3/42—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades helically bent, e.g. for lawn mowers
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D2101/00—Lawn-mowers

Definitions

  • a knife edge sharpener is permanently mounted on a harvester implement having a reel type cutter head for selective sharpening of the knife edges of the cutter head.
  • the sharpener unit is mounted for longitudinal movement along thecutter head and an indexing mechanism is incorporated for engagement with the rotary drive means of the cutter head in correspondence with longitudinal movement of the sharpener along the cutter head.
  • the present invention relates to the knife edge sharpener mechanisms and more in particular to an improved knife edge grinder for forage harvesters or similar units employing rotating cutter head assemblies.
  • the primary object of the present invention resides in the provision of an improved knife edge sharpener device for reel type cutter heads of harvesting machines which is permanently stored on the machine and can be quickly placed into operating position when the knife edges are to be sharpened and which is additionally provided with an indexing mechanism geared to the drive means which provides for movement of the grinder unit along the cutter head to rotatably advance the reel type cutter head in correspondence with longitudinal movement of the grinder unit and in direct relation to the helix position of the individual cutter blades.
  • FIG. 1 is a side elevational view of the sharpening device in accordance with the present invention for a reel type cutting mechanism of a harvesting machine, only a fragment of which is illustrated, illustrated in position for sharpening of the cutter blade knife edges;
  • FIG. 2 is a fragmentary front elevational view of the sharpening device illustrated in FIG. 1 with alternate positions of the device resulting from its movement shown in phantom lines;
  • FIG. 3 is a fragmentary cross-sectional view through the indexing mechanism of the sharpening device in FIG. 1 taken along line 3-3 thereof;
  • FIG. 4 is a cross-sectional view of the indexing mechanism of FIG. 3 taken along line 4--4 thereof;
  • FIG. 5 is a fragmentary cross-sectional view of the support and transverse movement mechanism of the sharpening device taken along line 5-5 of FIG. 3;
  • FIG. 6 is an enlarged fragmentary view of the indexing mechanism for the reel taken along line 66 of FIG. 1 and partly shown in cross section;
  • FIG. 7 is a similarly enlarged cross-sectional view through manual operating means for causing movement of the grinder unit along the cutter head while simultaneously actuating the indexing mechanism for the reel taken along line 7-7 of FIG. 1.
  • numeral 10 generally represents a frame of a harvesting machine such, as for instance, a forage harvester.
  • the harvesting machine may be of any known construction commonly supported on wheels, as is known, for traveling over the ground.
  • the harvested crop or other plant material is fed from the harvester table into a cutter head housing 13 for further processing.
  • the housing 13 includes opposed sidewalls l2 and 14, a top wall 15 and a hinged rear wall or cover 16.
  • Housing 13 supports a rotary wheel type cutter head assembly 17 supported on a rotatable shaft 18 (FIG. 6) which is conventionally drive connected to the drive mechanism of the harvesting machine (not shown).
  • the cutter head assembly 17 supports a plurality of individual longitudinal cutting blades 20 each of which has a beveled knife edge 22.
  • the cutting blades 20 are equally radially spaced from cutter head drive shaft 18 and are further equally angularly spaced in circumferential direction.
  • the cutting blades 20 extend along parallel helical or spiral contours so that upon rotation of the cutter head 17 each cutting blade 20 in succession engages the standing crop starting from the leading end of the cutting blade 20 and gradually moving over to the trailing end of the cutting blade 20 as the cutter head 17 rotates to obtain a slicing action.
  • the cutter head assembly 17 is provided to reduce the harvested crop or other plant material prior to discharge from the machine.
  • the present invention provides an improved cutter 17 head grinding mechanism permanently carried on the cutter head housing 13 as will be described in the following.
  • the carriage 34 supports a grinder unit 35, including motor 36, by means of support plate 38.
  • the carriage 34 and support plate 38 are provided with boss portions 40 and 42 on both sides of the motor 36.
  • the boss portions 40 and 42 are each provided with coaxially aligned bores 44 and 46, respectively, illustrated in FIG. which are adapted to receive a pair of parallel guide rods 45 and 47.
  • the upper portion of the carriage 34 at one transverse end thereof is provided with a bore 49 which is coaxially aligned with a bore 51 in a boss 53 on the lower portion of the carriage 34 and adapted to receive a threaded adjusting rod 50 which is longitudinally stationarily but rotatably retained in the boss 53.
  • Adjusting rod 50 is provided with a hand wheel 54 by which rod 50 can be rotated to cause adjustment of motor 36 transverse to the longitudinal direction of crossbar assembly 24 towards and away from the cutter head assembly 17.
  • Motor 36 which may be an electric motor.
  • the carriage 34 In order to traverse the motor 36 along the longitudi- 5 nalcrossbar 24, the carriage 34 is engaged by the worm i x As is known, the cutting blades are arranged Iongitudinally in radially spaced positions relative to the rotating shaft 18 of the cutter head assembly 17 with the krii fe edge 22 extending generally along a spiral or helical line as illustrated in FIG. 1. Since the grinding unit 35 can only travel along a straight line parallel to the cutter head assembly 17 but the cutting blades 20 have'a spiral shape, some form of adjustment must be provided to rotate cutter head assembly 17 in unison with the straight line movement of the grinding unit 35 travel along the crossbar assembly 24.
  • the motor is suitably connected by conduits to an electric power source such as the battery of the harvesting machine.
  • the selected grinding position of motor 36 relative to the cutting edge 22 is preferably locked in place by a pair of lock nuts I34 on the adjusting rod 50 and engageable with the upper portion of the carriage 34.
  • the hinged rear cover 16 of housing 13 Under normal operating conditions of the machine, i.e., during cutting operationsof the cutter head assembly 17, the hinged rear cover 16 of housing 13 will be in closed position against the frame of the cutter housing 13 and will be secured at the lower end of the cover 16 by means of lock assembly 60. In this position, the grinder unit is retained in stored position at the side into grinding engagement against knife edges 22 of the 35 to maintain the knife edges 22 of the engaged cutting blade 20 in engagement with the grinding stone 58. It is also necessary to properly position each cutting blade 20 for'grinding prior to starting the grinding unit35 At the same time, the grinding unit must be adjusted in position relative to the knife edges 22 to be able to perform proper grinding of the knife edges 22 of the cutting blades 20.
  • the bevel of the knife edge 22 must not be too steep nor too short to permit positioning of the knife edge 22 as close to a shear bar (not illustrated) of the cutter head 17 as possible.
  • the knife edge 22 of the cutting blades 20 must not be ground hollow since this provides an extremely thin edge which will break or chip easily and thusmake of the cutter head housing 13, as shown in phantom at ,1
  • the cooperating member 62 for worm 64 which is disposed at one side below the carriage member 34, need not be threaded in correspondence with the threads of the 6 worm 64 but instead a simple screw 130 may be provided which has a tapered tip 132 for mating engagement with the worm 64.
  • the screw 130 is adjustable the cutting blade inoperable.
  • the knife edge 22 of the cutting blades 20 should be ground such as to provide a proper cutting edge bevel which will permit positioning of the cutting blades 20 close to the shear bar and to provide a small clearance between the heel of the cutting blade and the blade supports of the cutter head assembly to permit clean cutting and easy feeding of the crop between the cutting blades of the cutter head and the shear bar.
  • the knife edges 22 of the cutting blades 20 have to be ground to the proper bevel length and at a proper angle.
  • between onehalf inch to one inch of bevel length together with a bevel of about 25 degrees is used.
  • a protective shield 128 illustrated -in FIGS. 1 and 2 is provided which is attached to the motor support plate 38.
  • An indexing mechanism for the cutter head assembly 17 which is geared to the longitudinal movement of the grinding unit motor 36 is provided to position an individual cutting blade20 and its knife edge 22 relative to the cutter head 17.
  • the cutter head shaft 18 outwardly of side wall 14 is provided'with an indexing plate which, as shown in FIGS. 1 and 6, is nonrotatably secured to the outer end 19 of cutter head shaft 18.
  • the indexing plate 70 is provided with a plurality of circumferentially equally spaced notches 72.
  • a cylindrical member 74 which abuts against the outer surface of indexing plate 70 and is rotatable around the cutter head shaft outer end 19 by means of a bearing 76.
  • the cylindrical member 74 is retained on the outer end 19 of shaft 18 by means of a plate 78 abuting against the outer end of cylindrical member 74 and which is clamped to the outer end 19 of shaft 18 by means of bolts 80.
  • a lever 82 is attached to cylindrical member 74 adjacent the outer surface of indexing plate 70 by means of welding or the like. The free end of lever 82 supports a pivoted socket member 84 attached for rotation by means of threaded pin 86.
  • the socket member 84 at the end of lever 82 is provided with a threaded bore 88 to receive the threaded portion 90 of a rotatable actuating rod 92 which extends along the outside of housing 13 towards worm 64 of the motor carriage 34 of the grinding unit 35.
  • actuating rod 92 is provided with a bevel gear 94 which is supported for rotation within the arms 96 and 98 of a bifurcated bracket 100 as more clearly seen in FIG. 3.
  • the bridge portion of supporting bracket 100 is provided with a bearing assembly 102 to accommodate rotation of actuating rod 92.
  • the bevel gear 94 of actuating rod 92 is in constant mesh with another bevel gear 104 right angularly disposed relative to the axis of actuating rod 92.
  • Bevel gear 104 is attached to the outer end of worm 64 and which worm 64 is adapted to initiate longitudinal movement of motor 36 and supporting carriage 34 along crossbar 24 as previously described.
  • the outer end ofworm 64 and attached gear 104 are supported for rotation within the arm 96 of bifurcated bracket 100 by means of a suitable bearing 106.
  • the bifurcated supporting bracket 100 has a leg extension 107 which is provided at its lower end with a cylindrical boss portion 108.
  • Boss portion 108 has a bore 110 for rotatable support of the shank end 112 of a crank 114.
  • the crank 114 supports a spur gear 116 having teeth 118 in constant mesh with a pinion gear 120.
  • Gear 120 is supported on the reduced diameter unthreaded outer end 65 of worm 64 which extends through both arms 96 and 98 of bracket 100.
  • Gear 120 is of considerably smaller diameter than spur gear 116, to thereby provide an increase in rotational speed of worm 64 over that of the crank 114.
  • lever 82 is provided with a pin [22 to which is attached one end of a tension spring 124.
  • the other end of spring 124 is secured to a ratchet 126 disposed adjacent the circumference of indexing plate 70.
  • Ratchet 126 is adapted to selectively engage one of the circumferential notches 72 on indexing plate 70.
  • crank 114 causes rotation of spur gear 116 which in turn rotates pinion gear 120 which is secured to the outer end 65'of worm 64 as illustrated in FlG. 7.
  • Rotation of worm 64 which is longitudinally stationarily retained, causes movement of carriage 34 along crossbar 24 by movement of rollers 32 relative to edge 22 to be ground to the desired dimension.
  • actuating rod 92 of the indexing mechanism is rotated at a slightly faster speed of rotation than worm 64.
  • Rotation of actuating rod 92 causes angular movement of lever 82 by means of threaded engagement within socket 84 at the lower end of lever 82. Since ratchet 126 is snapped into engagement within a notch 72 of the indexing plate 70 and held therein by means of tension spring 124, indexing plate 70 will be rotated in correspondence with angular movement of lever 82 by means of rotation of actuating rod 92.
  • indexing plate 70 is attached to the end 19 of shaft 18 of the cutter head assembly 17, the cutter head will be rotated in correspondence therewith to progressively position the helical longitudinal surface of knife edget22 of cutting blade 20 relative to the grinding wheel 58 and in direct relation to longitudinal movement of grinding motor 36 along crossbar 24.
  • the power drive mechanism of the cutter head assembly 17 is rendered inoperative such as by disengaging a transmission (not illustrated) located intermediate of the drive and cutter head 17 to prevent accidental unexpected movement of the cutter head 17 and to allow freedom of movement for proper indexing thereof.
  • each cutter blade 20 is started at one endthereof and advanced longitudinally along the cutting blade 20 towards its opposite end by movement of the grinding unit 35 which is advanced by the worm 64 as described above.
  • a series of longitudinal passes are made across each cutting blade 20, and the grinding unit 35 is periodically advanced transverse of the worm 64 by adjusting rod 50 until sufficient material has been removed from the blade 20 in the worst condition to present a uniform continuous bevel, free of nicks, gauges and the like, over the length of the cutting blade 20.
  • Each cutting blade 20 then is subsequently ground to match that of the initially ground cutting blade 20 to obtain a uniform clearance between all of the cutting blades 20 andthe shear bar.
  • the number of passes and speed of advance of the grinding unit 35 are controlled by the speed of rotation of the crank 114 and a function of the depth of cut of the grinding unit 35 on the cutting blade 20.
  • the notches 72 on the indexing plate correspond to the positions of the cutting blades 20 on the cutting head 17.
  • the indexing plate 70 is free to be manually positioned to be engaged by the ratchet 126 when the ratchet 126 is moved to the position illustrated in FIGS. 1 and 6.
  • the above engagement of the indexing plate 70 should be made with the grinding unit 35 in the starting position described above to thereby coordinate the movement of the cutter head 17 and the longitudinal travel of the grinding unit 35.
  • the indexing plate 70 is advanced to the next notch 72 with the grinding unit 35 again placed in the starting position to enable the procedure to be repeated.
  • the ratchet 126 is backed away from the indexing plate 70 and positioned against the lever 82 where the spring 124 maintains the ratchet 126 against the lever 82. With the ratchet 126 against the lever 82, the indexing plate 70 is free of the ratchet 126 for increased rotation under normal operating conditions.
  • the ratchet 126 is designed to allow rotation of the indexing plate 70 with the ratchet in the engaged position should it be left there inadvertently and the machine placed in operation.
  • the spring 122 has sufficient force to hold the ratchet 126 in engagement when the'cutter head 17 is disengaged, but will allow it to release the indexing plate 70 under the force of the drive mechanism for the machine.
  • a knife edge sharpening device for use with a reel type cutter head supported for rotation within a housing, the reel type cutter head including a central supporting shaft and a plurality of longitudinal cutting blades circumferentiallyspaced around the central supporting shaft of said cutter head, each of said blades extending helically in a longitudinal direction and each having a knife edge, said housing having opposite sidewalls and a longitudinal access opening between the sidewalls, the improvement characterized by said sharpening device comprising a grinder unit having a rotating grinding stone, said grinder unit being mounted in position adjacent said reel type cutter head and having a rotating axis substantially normal to the axis of the central supporting shaft of said cutter head,
  • ratchet means engageable with a selected one of said circumferential notches of said indexing plate adapted to selectively drivingly connect said lever arm with said plate, bias means connected between said lever arm and said ratchet means to resiliently retain said ratchet means in engagement within said notch, and force transmitting means connecting said lever arm with said driving mechanismffor angular displacement of said lever arm to thereby intermittently rotate said indexing plate, said force transmitting means including pivoted socket means rotatably connected to said lever arm, said socket means having a threaded bore, and a rotatable actuating rod having one end threadedly engaged within said socket means and the other end in driving engagement with the rotatable driving mechanism so that rotation of said force transmitting means causes angular displacement of said lever arm.
  • the sharpener device according to claim I further characterized by said mounting means having provisions on said housing to permit movement of said grinding unit into inactive stored position on the housing re mote from the cutter head.
  • a harvesting machine such as a forage harvester having a reel type cutter head supported within a housing, said cutter head having a central support shaft, a plurality of helically positioned cutting blades and a cutter head shaft for rotatable support of the blades, said cutter head being adapted for rotation to cut crop material, the improvement characterized by a grinding unit mounted adjacent said cutter head for longitudinal movement therealong to selectively sharpen the knife edges of said cutting blades when said cutter head is not in operation;
  • an indexing mechanism having means cooperatively interconnecting said cutter head shaft with said grinding unit, longitudinal way means for support of said grinding unit for movement past said cutter head, rotatable drive means drivingly interconnecting said grinding unit with said indexing means so that upon actuation of said rotatable drive means said grinding unit will be longitudinally moved along said way means past said cutter head while simultaneously intermittently rotating said cutter head by actuation of said indexing means, said indexing means including a lever arm attached to the cutter head, and an actuating rod with a threaded portion for moving the lever arm upon rotation of the actuating rod relative to other portions of the indexing mechanism operatively connecting the lever arm to the portion of the rotatable drive means which advances the grinding unit.
  • indexing means being selectively drivingly connectable to said cutter head shaft and to said rotatable drive means, said indexing means comprising a plate member attached to said cutter head shaft, said lever arm being rotatably journaled on said cutter head shaft, and ratchet means for selective drive connection of said actuating lever arm with said plate member, said ratchet means permitting independent rotation of said cutter head and said plate member relative to said lever arm when said cutter head is in operation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Harvester Elements (AREA)
  • Threshing Machine Elements (AREA)
US00270410A 1972-07-10 1972-07-10 Knife edge grinder for rotary reel type cutter head Expired - Lifetime US3811232A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US00270410A US3811232A (en) 1972-07-10 1972-07-10 Knife edge grinder for rotary reel type cutter head
CA173,342A CA988718A (en) 1972-07-10 1973-06-06 Knife edge grinder for rotary reel type cutter head
ZA733893A ZA733893B (en) 1972-07-10 1973-06-08 Knife edge grinder for rotary reel type cutter head
AU56779/73A AU463002B2 (en) 1972-07-10 1973-06-12 Knife edge grinder for rotary reel type cutter head
AR248820A AR198317A1 (es) 1972-07-10 1973-06-29 Afiladora de cuchillas para una cabeza cortadora giratoria del tipo de aspadera
FR7325060A FR2192477A5 (sv) 1972-07-10 1973-07-09
GB3269673A GB1432873A (en) 1972-07-10 1973-07-09 Sharpening devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00270410A US3811232A (en) 1972-07-10 1972-07-10 Knife edge grinder for rotary reel type cutter head

Publications (1)

Publication Number Publication Date
US3811232A true US3811232A (en) 1974-05-21

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ID=23031227

Family Applications (1)

Application Number Title Priority Date Filing Date
US00270410A Expired - Lifetime US3811232A (en) 1972-07-10 1972-07-10 Knife edge grinder for rotary reel type cutter head

Country Status (7)

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US (1) US3811232A (sv)
AR (1) AR198317A1 (sv)
AU (1) AU463002B2 (sv)
CA (1) CA988718A (sv)
FR (1) FR2192477A5 (sv)
GB (1) GB1432873A (sv)
ZA (1) ZA733893B (sv)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3958766A (en) * 1975-06-02 1976-05-25 Sperry-New Holland Sperry Rand Corporation Cutterhead rotating mechanism for forage harvester
US3991525A (en) * 1975-07-28 1976-11-16 Fred Oswald Apparatus for sharpening blades mounted on drums
US4843767A (en) * 1988-03-28 1989-07-04 Deere & Company Automatic forage harvester knife sharpening system
US6450866B1 (en) * 1999-03-11 2002-09-17 Deere & Company Sharpening apparatus
US20070184760A1 (en) * 2006-02-07 2007-08-09 Don Cotton Lawnmower Blade Sharpener
CN105988470A (zh) * 2015-02-15 2016-10-05 苏州宝时得电动工具有限公司 自动割草机
CN111955143A (zh) * 2020-07-13 2020-11-20 淮阴工学院 一种灌木丛与草坪两用式的园林修剪装置
CN112405131A (zh) * 2020-12-03 2021-02-26 湖北中烟工业有限责任公司 一种带磨刀装置的切丝机及其使用方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI79961C (sv) * 1988-09-16 1990-04-10 Metsae Botnia Ab Oy Anordning för skärning av knivarna i en kapningsvals i en cellulosator kmaskins arkskärmaskin
CN106736889B (zh) * 2016-12-28 2018-11-06 兴化市台林机械有限公司 滚刀磨床附件位置调整与一键锁紧机构及其工作方法

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US1874331A (en) * 1931-05-06 1932-08-30 Fay J A & Egan Co Knife grinder support for woodworking machines
US2318865A (en) * 1940-10-12 1943-05-11 Harold I Johnson Pitch gauge and milling cutter for propellers
US3581446A (en) * 1968-09-17 1971-06-01 Koehring Co Sharpeners for cutting reels
US3638363A (en) * 1970-06-15 1972-02-01 Koehring Co Sharpeners for cutting reels
US3724139A (en) * 1971-06-11 1973-04-03 Gehl Co Blade sharpening device for rotatable chopping cylinders
US3726047A (en) * 1971-05-24 1973-04-10 Hesston Corp Motor driven knife grinder for forage harvester cutters

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1807975A (en) * 1928-08-31 1931-06-02 Charles W Eyres Built-in grinder and ensilage cutting machine
US2601574A (en) * 1948-08-02 1952-06-24 Edith Weaver Lawn mower sharpening machine
US3479776A (en) * 1966-09-26 1969-11-25 Raymond J O Berg Blade sharpener

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1874331A (en) * 1931-05-06 1932-08-30 Fay J A & Egan Co Knife grinder support for woodworking machines
US2318865A (en) * 1940-10-12 1943-05-11 Harold I Johnson Pitch gauge and milling cutter for propellers
US3581446A (en) * 1968-09-17 1971-06-01 Koehring Co Sharpeners for cutting reels
US3638363A (en) * 1970-06-15 1972-02-01 Koehring Co Sharpeners for cutting reels
US3726047A (en) * 1971-05-24 1973-04-10 Hesston Corp Motor driven knife grinder for forage harvester cutters
US3724139A (en) * 1971-06-11 1973-04-03 Gehl Co Blade sharpening device for rotatable chopping cylinders

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3958766A (en) * 1975-06-02 1976-05-25 Sperry-New Holland Sperry Rand Corporation Cutterhead rotating mechanism for forage harvester
FR2312939A1 (fr) * 1975-06-02 1976-12-31 Sperry Rand Corp Mecanisme pour faire tourner le tambour-hacheur d'une moissonneuse a fourrage
US3991525A (en) * 1975-07-28 1976-11-16 Fred Oswald Apparatus for sharpening blades mounted on drums
US4843767A (en) * 1988-03-28 1989-07-04 Deere & Company Automatic forage harvester knife sharpening system
US6450866B1 (en) * 1999-03-11 2002-09-17 Deere & Company Sharpening apparatus
US20070184760A1 (en) * 2006-02-07 2007-08-09 Don Cotton Lawnmower Blade Sharpener
US7503835B2 (en) * 2006-02-07 2009-03-17 Don Cotton Lawnmower blade sharpener
CN105988470A (zh) * 2015-02-15 2016-10-05 苏州宝时得电动工具有限公司 自动割草机
CN111955143A (zh) * 2020-07-13 2020-11-20 淮阴工学院 一种灌木丛与草坪两用式的园林修剪装置
CN111955143B (zh) * 2020-07-13 2022-03-18 淮阴工学院 一种灌木丛与草坪两用式的园林修剪装置
CN112405131A (zh) * 2020-12-03 2021-02-26 湖北中烟工业有限责任公司 一种带磨刀装置的切丝机及其使用方法

Also Published As

Publication number Publication date
AR198317A1 (es) 1974-06-14
GB1432873A (en) 1976-04-22
FR2192477A5 (sv) 1974-02-08
CA988718A (en) 1976-05-11
AU5677973A (en) 1974-12-12
AU463002B2 (en) 1975-07-10
ZA733893B (en) 1974-05-29

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