CA1280313C - Harrow - Google Patents
HarrowInfo
- Publication number
- CA1280313C CA1280313C CA000529908A CA529908A CA1280313C CA 1280313 C CA1280313 C CA 1280313C CA 000529908 A CA000529908 A CA 000529908A CA 529908 A CA529908 A CA 529908A CA 1280313 C CA1280313 C CA 1280313C
- Authority
- CA
- Canada
- Prior art keywords
- support member
- tines
- tine
- harrow
- subframe
- 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
Links
- 230000033001 locomotion Effects 0.000 claims description 25
- 230000009471 action Effects 0.000 claims description 9
- OCDRLZFZBHZTKQ-NMUBGGKPSA-N onetine Chemical compound C[C@@H](O)[C@@]1(O)C[C@@H](C)[C@@](C)(O)C(=O)OC\C2=C\CN(C)CC[C@@H](OC1=O)C2=O OCDRLZFZBHZTKQ-NMUBGGKPSA-N 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims 2
- 230000003245 working effect Effects 0.000 abstract description 2
- 239000010813 municipal solid waste Substances 0.000 description 6
- 239000002689 soil Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 230000002452 interceptive effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009313 farming Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
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- 230000005540 biological transmission Effects 0.000 description 1
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- 230000007480 spreading Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B19/00—Harrows with non-rotating tools
- A01B19/02—Harrows with non-rotating tools with tools rigidly or elastically attached to a tool-frame
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Soil Working Implements (AREA)
Abstract
"HARROW"
ABSTRACT OF THE DISCLOSURE
A tine mounting arrangement for a harrow provides a transverse elongate support member with a plurality of stub shafts extending outwardly therefrom in the same horizontal plane at an angle of 45°. Each stub shaft carries a pair of spring tines with the springs wrapped around the shaft and an inclined portion of the tine extending forwardly from the angled shaft and there-fore at an angle to the transverse support member. Two such members can be mounted on pivot arms to provide a transverse reciprocating working action of the tines.
This harrow element can be mounted upon support arms pivoted from a draw bar and carried on ground wheels which may be simple depth wheels or may form packer wheels. In an alternative arrangement the packer wheels and harrow element are mounted on a subframe which can be reversed so that the packers operate in advance of the harrow element.
ABSTRACT OF THE DISCLOSURE
A tine mounting arrangement for a harrow provides a transverse elongate support member with a plurality of stub shafts extending outwardly therefrom in the same horizontal plane at an angle of 45°. Each stub shaft carries a pair of spring tines with the springs wrapped around the shaft and an inclined portion of the tine extending forwardly from the angled shaft and there-fore at an angle to the transverse support member. Two such members can be mounted on pivot arms to provide a transverse reciprocating working action of the tines.
This harrow element can be mounted upon support arms pivoted from a draw bar and carried on ground wheels which may be simple depth wheels or may form packer wheels. In an alternative arrangement the packer wheels and harrow element are mounted on a subframe which can be reversed so that the packers operate in advance of the harrow element.
Description
33~3 "HARROW"
BACKGROUND OF THE INVENTION
This lnvention relates to a harrow and particu-larly but not exclusively to one which is reciprocatingly driven in a direction transverse to the general direction of motion of the harrow to work the harrow tines on the ground as the. harrow moves forwardly.
Various designs of reciprocating or "live"
harrows have been developed over the y~ars and recently more attention has been given to this type of equipment in view of changes to farming methods which have often required an improved harrow action in trashy soils and an improved working of the soil for incorporation of chemi-cals. Devices of this type are shown for example in U.S.
Patents 503,434, 1,327,424, 1,544,564, 3,422,907 and 3,499,494. These devices include a support bar for the harrow tines which is arranged to reciprocate longitud-inally that is transverse to the direction of motion of the harrow.
However none of these devices has been entirely satisfactory and there remains a requirement for an improved harrow.
... ~ ~
. ~ .
~L~8C1 3~3 SUMMARY OF THE INVENTION
It is one ob~ect of the present invention, therefore, to provide an improved harrow ln which ~he harrow tines are mounted in a new and unique manner which provldes a number of significant advantages.
According to a first aspect of the inventlon, therefore, there is provided a harrow comprising frame means arxanged for attachment to transport means whereby the frame means can be moved across the ground in a direction of movement, an elongate, substantially horizontal support member mounted on the frame means transverse to the direction of motion, a plurality of substantially horizontal tine support bars arranged in spaced relation along the elongate support member and each having one end attached to the support member so that an opposed free end thereof extends outwardly from the support member to define a tine supporting section o~
each tine supporting bar at an angle to the support bar and to the direction of motion, and a plural1ty of spring tines each comprislng a flexible coiled spring portion defining an axis around which it is coiled and arranged for engaging around a respective one of the tine support sections such that the axis of the spring portion lies at said angle of said support section and a tine portion depending downwardly from the spring portion fox engaging ,, ;~, - ,, ~L28~3 the ground in a harrowlng action.
Thls unique mounting of the tines on respectlve ones of a plurality of angled support bars provide~ a number of advantages. Firstly, the tines can be readily removed from the support bars without interfering with other tines on the support member. In many cases two such tines can be provided on each support bar but can be readily attended to without interfering with any other of the tines.
Secondly the angling of tha support bars pro-vides an angling of the tine itself that is the coil spring providing the conventional flexibility and also the spring tine portion itself. Thus the spring is angled to the dire~tion of motion and provides a new and effective kicking action as the tine is flexed and released by the varying levels of soil which it en-counters.
These advantages are obtained either with the support member stationary or with it reciprocated.
Preferably therefor~ the member is reciprocated longitud-inally and this can provide a third advantage, particu-larly when there are two tines on each support bar in that the transverse movement and the angled position of the two tines on each bar acts to feed trash material z:
' :~ :
:.
~2~3~)3~3 past the bars thus assistlng to prevent any blocking or clogging of the tines with the trash.
A further ob~ect of this invention ls ~.o provide an improved harrowing and packing arrangement particularly for use with a driven live harrow.
With the foregoing in view, and other advan-tages as will become appaxent to those skilled in the art to which this invention relates as this specification proceeds, the invention is herein described by reference to the accompanying drawings forming a part hereof, which includes a description of the best mode known to the applicant and of the preferred typical embodiment of the principles of the present invention, in which:
ESCRIPTION OF THE DRAWINGS
Figure 1 i5 a plan view of a harrow according to the invention.
Figure 2 is an enlarged isometric view of one tine support bar of the harrow o~ Figure 1~
Flgure 3 is a side elevational view of the harrow of Figure 1.
Figure 4 is an isometric view of a modified harrow according to the present invention.
In the drawings like characters of reference indicate corresponding parts in the different figures.
. ~ ~
8633~3 DETAILED DESCRIPTION
Turnlng firstly to the embodimen~ shown in Figures 1, 2 and 3, there is shown a draw bar 10 o~ any suitable e~uipment which may itself be a harrow draw bar for solely drawing the harrow of the present invention or it may be a draw bar of a cultivator or a discer or similar equipment depending upon farming requirements. A
support bracket generally indicated at 11 is arranged for attachment to the draw bar 10 by bolts 12 and provides a short length channel for receiving an elongate support member or strut 13. Thus the channel provides a pair of sides 14 and a base 15 for supporting an inner end of the strut 13 relative to a pivot pin 16. Thus the member or strut 13 extends d1rectly rearwardly from the draw bar 10 and can b~ pivoted about the pin 16 from the normal work-ing position shown in Figure 3 to a ralsed position and held in that position by a suitable pin passing through one of the holes 17 defined in an upper paxt of the sides 14.
The arm 13 defines a first horizon~al portion 18 and a rear downwardly inclined portion 19 which inter-connects the arm to a ground wheel generalIy indicated at 20. The ground wheel is carried in a yoke 2I pivoted in a vertical sleeve 22 the height of which can be adjusted ~, ..
, ~213~3~3 by a crank 23 in conventional manner. Thus adjustment of the crank 23 acts to raise and lower the substantially horizontal portion 18 of the arm for raising and lowering the harrow mechanism sup~orted by the arm 13 and describ--ed hereinafter.
The harrow comprises a pair of transverse .. ..
elongate support members 23 and 24 which are effectively equal in length ~nd arranged one in front of the other.
The transverse members 23 and 24 are pivotall~ supported on forwardly extending pivot arms 25, 26 with suitable bearings 27 to allow the transmission of movement from the pivot arms while retaining the transverse members 23, 24 substantially rigid and horizontal. The pivot arms 25, 26 are in turn supported on a main strut 28 which is carrled on the arms 18 by suitable U brackets 29.
Further bearings 30 between the main strut 28 and the pivot arms 27 allow the pivot 26, 27 to pivot in a horizontal plane about the bearings 30 under motive power provided by a strut 31 and eccentric 32 connected between the main strut 28 and the pivot arm 260 In Figure 1, the eccentric is shown at the centre of a s~roke and thus the pivot arms are at right angles to the support members 23, 24 so it will be appreciated that rotation of the eccen tric 32 under power from a suitable motor wil~ cause the )3~3 support members 23 and 24 to reciproca~e along their length in opposed phased through a stroke determlned by the di~meter of the eccentrlc 32.
Each of the support members 23,24 carries a plurality of tine support bars 33 each carrying a pair of tines 34, 35. Each of the tine suppox~ bars 33 is of tubular cylindrical form welded to one face of the member 23 as best shown in Figure 2. In addition each is arranged in a horizontal plane and at an angle to the member 23 of the order of 45. As shown in Figure 1 the bars 33 extend forwardly and leftwardly of the member 23 and extend rearwardly and leftwardly of the member 24~
However this arrangement can be altered so that the bars are rearwardly of or forwardly of the bars 23, 24 as required and they can, as re~uired, extend either to the left or to the right.
Each tine 34, 35 comprises a depending tine portion 341 which commences substantially vertically downwardly at 342 and it includes a cranked elbow 343 defining a forwardly inclined portion 344. The depending tine portion is integral with a helical spring portion 345 which is wound to define an axis generally at righ~
angles to the depending portion 3d~, In addition the elbow 343 defines a bend in a direction such that the ~28~3~3 whole of the depending tine portion 341 lies in a plane at right angles to the axis of the spring portion 3~5, The dlameter of the spring portion 3~5 ls sligh~
greater than the outside diameter of the tube or support bar 33 so that lt can slide onto the support bar 33 and be received therearound as a loose fit. As will be noted from Figure 2, the spring portion of the tine 34 is arranged as a right hand winding and the spring portion of the tine 35 is arranged as a left hand winding so that the tines are arranged at opposed ends of the bar 33 with the springs leading therefrom toward a central area. At the central area each of the spring portions includes an axially turned clamping section 346 which is clamped to the outer surface of the tube by a bolt 347 and plate 348. Thus the end of the spring portion remote from the tine portion is rigidly clamped to the tube 33 allowing the tine portion to flex around the axis defined by the spring portion so as to tighten the spring portion down towards the tube. The number of turns in the spring portion is preferably of the order of 5 and the diameter is chosen relative to the diameter of the tube to allow a significant degree of tightening of the spring portion generally greater than that of conventional tines in view of the large degree of deflection of the tine portion ~ ., , .. , , .. ~ ~ , ~LZ~ 3~3 which can occur in thls arrangement.
It will be appreciated, as shown best ln Figure 1, that as the tlne is mounted upon th~ angled bar 33, the forwardly inclined portion 344 of each of the tines is not directed in the direction of motion but at an angle thereto and is at 45 thereto on the opposite side to the angle of the bar 33. In operation this angle provides a surprising and novel effect in that even with the members 23, 24 stationary, the tines tend to deflect rearwardly parallel to the direction of motion that is out of the plane of the tine portion. When released by the soil, the tine tends to spring both axially along the bar 33 and radially around the bar 33 thus providing an improved kicking action of the tine in the soil.
It will be noted that the diameter of the eccentric 32 is less than the spacing of the tines 34, 35 in the direction of the member 23. Thus the stroke of movement of the member ~3 will be less than the spacing of the tines so that their action does not overlap on the ground as the ground moves past the tines in the direc-tion of motion. Furthermore lt will be noted that the length of and spacing of the bars 34 relative to the member 23 is such that the tine 35 at the base of the bar 33 is positloned approximately mldway between the .
, ~ .
, :
)3~3 tines 34 of two adjacent bars which are of course posl-tioned at the outer or free end of the bars 33.
The tines can of course be simply removed ~rom the harrow without interfering with the tines of any other bar 33 simply by removing the bolt 347 and the bracket 348 to release the spring portions for removal of the tines along the bar 33.
When the members 23 and 24 are in motion under power from the eccentric 32, a le~tward movement of the bar 33 acts to feed trash materlal past the tines and a rightward movement acts to draw remaining trash forwardly in front of ths tines. Thus the reciprocating movement acts to effectively spread the ~rash and to feed it through in portions in the manner of a ratchet. Of course the tines of the member 24 operate ln a similar manner rearwardly of or sequentially of the tines of the member 23 thus providing a double effect on the trash to provide an effective fluffing or spreading of the trash over the ground.
Turning now to Figure 4, there is shown a modi-fied arrangement incorporating the following modifica-tions.
Firstly the ground wheels 20 are replaced by a plur~lity of packer wheels 40 of conventlonal form moun~-~~
~ -' 3~3 ed upon a rod 41 for rotation about bearings 42 carried by depending arms 43, 44. Thus in place o~ ~he simple depth wheels 20, a packing actlon across the ~ull wldth of the implement is obtained by the packer whe~ls 40.
Secondly the wheels 40 and the harrow element are no longer directly connected to the arms. In this embodiment thP harrow element generally indicated at 45 and the struts 43, 44 are connected to a channel member 4S which in turn is connected to the arm 13 by sitting the arm 13 ln the base of the channel member 46 and then passing pins or bolts 47 through both to interconnect the channel and arm. It will be noted that the channel is symmetrical and thus can be reversed in its position on the arm 13 so that the packer wheels 40 are placed ahead of the harrow element indicated at 45. Thus at the requirement of the farmer, either a harrow action can be carried out on the soil previous to the packers or subsequent to the packers.
Since various modifications can he made in my invention as hereinabove described, and many apparently wldely different embodiments of same made within the spirit and scope of the claims without departing from such spirit and scope, it is intended that all matter contained in the accompanying specification shall be :
-:, . . ' , . .
-.; :
~28~3~3 lnterpreted as illustrative only and not in a limiting sense.
. ~.. - .
~-~ .;",~
.
~' . ' , .. .
.
.
- : ,,' ~ ' , .; . : , . .
BACKGROUND OF THE INVENTION
This lnvention relates to a harrow and particu-larly but not exclusively to one which is reciprocatingly driven in a direction transverse to the general direction of motion of the harrow to work the harrow tines on the ground as the. harrow moves forwardly.
Various designs of reciprocating or "live"
harrows have been developed over the y~ars and recently more attention has been given to this type of equipment in view of changes to farming methods which have often required an improved harrow action in trashy soils and an improved working of the soil for incorporation of chemi-cals. Devices of this type are shown for example in U.S.
Patents 503,434, 1,327,424, 1,544,564, 3,422,907 and 3,499,494. These devices include a support bar for the harrow tines which is arranged to reciprocate longitud-inally that is transverse to the direction of motion of the harrow.
However none of these devices has been entirely satisfactory and there remains a requirement for an improved harrow.
... ~ ~
. ~ .
~L~8C1 3~3 SUMMARY OF THE INVENTION
It is one ob~ect of the present invention, therefore, to provide an improved harrow ln which ~he harrow tines are mounted in a new and unique manner which provldes a number of significant advantages.
According to a first aspect of the inventlon, therefore, there is provided a harrow comprising frame means arxanged for attachment to transport means whereby the frame means can be moved across the ground in a direction of movement, an elongate, substantially horizontal support member mounted on the frame means transverse to the direction of motion, a plurality of substantially horizontal tine support bars arranged in spaced relation along the elongate support member and each having one end attached to the support member so that an opposed free end thereof extends outwardly from the support member to define a tine supporting section o~
each tine supporting bar at an angle to the support bar and to the direction of motion, and a plural1ty of spring tines each comprislng a flexible coiled spring portion defining an axis around which it is coiled and arranged for engaging around a respective one of the tine support sections such that the axis of the spring portion lies at said angle of said support section and a tine portion depending downwardly from the spring portion fox engaging ,, ;~, - ,, ~L28~3 the ground in a harrowlng action.
Thls unique mounting of the tines on respectlve ones of a plurality of angled support bars provide~ a number of advantages. Firstly, the tines can be readily removed from the support bars without interfering with other tines on the support member. In many cases two such tines can be provided on each support bar but can be readily attended to without interfering with any other of the tines.
Secondly the angling of tha support bars pro-vides an angling of the tine itself that is the coil spring providing the conventional flexibility and also the spring tine portion itself. Thus the spring is angled to the dire~tion of motion and provides a new and effective kicking action as the tine is flexed and released by the varying levels of soil which it en-counters.
These advantages are obtained either with the support member stationary or with it reciprocated.
Preferably therefor~ the member is reciprocated longitud-inally and this can provide a third advantage, particu-larly when there are two tines on each support bar in that the transverse movement and the angled position of the two tines on each bar acts to feed trash material z:
' :~ :
:.
~2~3~)3~3 past the bars thus assistlng to prevent any blocking or clogging of the tines with the trash.
A further ob~ect of this invention ls ~.o provide an improved harrowing and packing arrangement particularly for use with a driven live harrow.
With the foregoing in view, and other advan-tages as will become appaxent to those skilled in the art to which this invention relates as this specification proceeds, the invention is herein described by reference to the accompanying drawings forming a part hereof, which includes a description of the best mode known to the applicant and of the preferred typical embodiment of the principles of the present invention, in which:
ESCRIPTION OF THE DRAWINGS
Figure 1 i5 a plan view of a harrow according to the invention.
Figure 2 is an enlarged isometric view of one tine support bar of the harrow o~ Figure 1~
Flgure 3 is a side elevational view of the harrow of Figure 1.
Figure 4 is an isometric view of a modified harrow according to the present invention.
In the drawings like characters of reference indicate corresponding parts in the different figures.
. ~ ~
8633~3 DETAILED DESCRIPTION
Turnlng firstly to the embodimen~ shown in Figures 1, 2 and 3, there is shown a draw bar 10 o~ any suitable e~uipment which may itself be a harrow draw bar for solely drawing the harrow of the present invention or it may be a draw bar of a cultivator or a discer or similar equipment depending upon farming requirements. A
support bracket generally indicated at 11 is arranged for attachment to the draw bar 10 by bolts 12 and provides a short length channel for receiving an elongate support member or strut 13. Thus the channel provides a pair of sides 14 and a base 15 for supporting an inner end of the strut 13 relative to a pivot pin 16. Thus the member or strut 13 extends d1rectly rearwardly from the draw bar 10 and can b~ pivoted about the pin 16 from the normal work-ing position shown in Figure 3 to a ralsed position and held in that position by a suitable pin passing through one of the holes 17 defined in an upper paxt of the sides 14.
The arm 13 defines a first horizon~al portion 18 and a rear downwardly inclined portion 19 which inter-connects the arm to a ground wheel generalIy indicated at 20. The ground wheel is carried in a yoke 2I pivoted in a vertical sleeve 22 the height of which can be adjusted ~, ..
, ~213~3~3 by a crank 23 in conventional manner. Thus adjustment of the crank 23 acts to raise and lower the substantially horizontal portion 18 of the arm for raising and lowering the harrow mechanism sup~orted by the arm 13 and describ--ed hereinafter.
The harrow comprises a pair of transverse .. ..
elongate support members 23 and 24 which are effectively equal in length ~nd arranged one in front of the other.
The transverse members 23 and 24 are pivotall~ supported on forwardly extending pivot arms 25, 26 with suitable bearings 27 to allow the transmission of movement from the pivot arms while retaining the transverse members 23, 24 substantially rigid and horizontal. The pivot arms 25, 26 are in turn supported on a main strut 28 which is carrled on the arms 18 by suitable U brackets 29.
Further bearings 30 between the main strut 28 and the pivot arms 27 allow the pivot 26, 27 to pivot in a horizontal plane about the bearings 30 under motive power provided by a strut 31 and eccentric 32 connected between the main strut 28 and the pivot arm 260 In Figure 1, the eccentric is shown at the centre of a s~roke and thus the pivot arms are at right angles to the support members 23, 24 so it will be appreciated that rotation of the eccen tric 32 under power from a suitable motor wil~ cause the )3~3 support members 23 and 24 to reciproca~e along their length in opposed phased through a stroke determlned by the di~meter of the eccentrlc 32.
Each of the support members 23,24 carries a plurality of tine support bars 33 each carrying a pair of tines 34, 35. Each of the tine suppox~ bars 33 is of tubular cylindrical form welded to one face of the member 23 as best shown in Figure 2. In addition each is arranged in a horizontal plane and at an angle to the member 23 of the order of 45. As shown in Figure 1 the bars 33 extend forwardly and leftwardly of the member 23 and extend rearwardly and leftwardly of the member 24~
However this arrangement can be altered so that the bars are rearwardly of or forwardly of the bars 23, 24 as required and they can, as re~uired, extend either to the left or to the right.
Each tine 34, 35 comprises a depending tine portion 341 which commences substantially vertically downwardly at 342 and it includes a cranked elbow 343 defining a forwardly inclined portion 344. The depending tine portion is integral with a helical spring portion 345 which is wound to define an axis generally at righ~
angles to the depending portion 3d~, In addition the elbow 343 defines a bend in a direction such that the ~28~3~3 whole of the depending tine portion 341 lies in a plane at right angles to the axis of the spring portion 3~5, The dlameter of the spring portion 3~5 ls sligh~
greater than the outside diameter of the tube or support bar 33 so that lt can slide onto the support bar 33 and be received therearound as a loose fit. As will be noted from Figure 2, the spring portion of the tine 34 is arranged as a right hand winding and the spring portion of the tine 35 is arranged as a left hand winding so that the tines are arranged at opposed ends of the bar 33 with the springs leading therefrom toward a central area. At the central area each of the spring portions includes an axially turned clamping section 346 which is clamped to the outer surface of the tube by a bolt 347 and plate 348. Thus the end of the spring portion remote from the tine portion is rigidly clamped to the tube 33 allowing the tine portion to flex around the axis defined by the spring portion so as to tighten the spring portion down towards the tube. The number of turns in the spring portion is preferably of the order of 5 and the diameter is chosen relative to the diameter of the tube to allow a significant degree of tightening of the spring portion generally greater than that of conventional tines in view of the large degree of deflection of the tine portion ~ ., , .. , , .. ~ ~ , ~LZ~ 3~3 which can occur in thls arrangement.
It will be appreciated, as shown best ln Figure 1, that as the tlne is mounted upon th~ angled bar 33, the forwardly inclined portion 344 of each of the tines is not directed in the direction of motion but at an angle thereto and is at 45 thereto on the opposite side to the angle of the bar 33. In operation this angle provides a surprising and novel effect in that even with the members 23, 24 stationary, the tines tend to deflect rearwardly parallel to the direction of motion that is out of the plane of the tine portion. When released by the soil, the tine tends to spring both axially along the bar 33 and radially around the bar 33 thus providing an improved kicking action of the tine in the soil.
It will be noted that the diameter of the eccentric 32 is less than the spacing of the tines 34, 35 in the direction of the member 23. Thus the stroke of movement of the member ~3 will be less than the spacing of the tines so that their action does not overlap on the ground as the ground moves past the tines in the direc-tion of motion. Furthermore lt will be noted that the length of and spacing of the bars 34 relative to the member 23 is such that the tine 35 at the base of the bar 33 is positloned approximately mldway between the .
, ~ .
, :
)3~3 tines 34 of two adjacent bars which are of course posl-tioned at the outer or free end of the bars 33.
The tines can of course be simply removed ~rom the harrow without interfering with the tines of any other bar 33 simply by removing the bolt 347 and the bracket 348 to release the spring portions for removal of the tines along the bar 33.
When the members 23 and 24 are in motion under power from the eccentric 32, a le~tward movement of the bar 33 acts to feed trash materlal past the tines and a rightward movement acts to draw remaining trash forwardly in front of ths tines. Thus the reciprocating movement acts to effectively spread the ~rash and to feed it through in portions in the manner of a ratchet. Of course the tines of the member 24 operate ln a similar manner rearwardly of or sequentially of the tines of the member 23 thus providing a double effect on the trash to provide an effective fluffing or spreading of the trash over the ground.
Turning now to Figure 4, there is shown a modi-fied arrangement incorporating the following modifica-tions.
Firstly the ground wheels 20 are replaced by a plur~lity of packer wheels 40 of conventlonal form moun~-~~
~ -' 3~3 ed upon a rod 41 for rotation about bearings 42 carried by depending arms 43, 44. Thus in place o~ ~he simple depth wheels 20, a packing actlon across the ~ull wldth of the implement is obtained by the packer whe~ls 40.
Secondly the wheels 40 and the harrow element are no longer directly connected to the arms. In this embodiment thP harrow element generally indicated at 45 and the struts 43, 44 are connected to a channel member 4S which in turn is connected to the arm 13 by sitting the arm 13 ln the base of the channel member 46 and then passing pins or bolts 47 through both to interconnect the channel and arm. It will be noted that the channel is symmetrical and thus can be reversed in its position on the arm 13 so that the packer wheels 40 are placed ahead of the harrow element indicated at 45. Thus at the requirement of the farmer, either a harrow action can be carried out on the soil previous to the packers or subsequent to the packers.
Since various modifications can he made in my invention as hereinabove described, and many apparently wldely different embodiments of same made within the spirit and scope of the claims without departing from such spirit and scope, it is intended that all matter contained in the accompanying specification shall be :
-:, . . ' , . .
-.; :
~28~3~3 lnterpreted as illustrative only and not in a limiting sense.
. ~.. - .
~-~ .;",~
.
~' . ' , .. .
.
.
- : ,,' ~ ' , .; . : , . .
Claims (3)
-
- (1) A harrow comprising frame means arranged for attachment to transport means whereby the frame means can be moved across the ground in a direction of move-ment, an elongate, substantially horizontal support mem-ber, means mounting said support member on said frame means in an orientation such that it extends transversely to the direction of motion, said mounting means being arranged to maintain said support member in said orienta-tion on the frame means, a plurality of substantially horizontal tine support bars each fixedly mounted on said support member in spaced relation along the elongate sup-port member and each having one end directly attached to the support member so that an opposed free end thereof extends outwardly from the support member to define a tine supporting section of each tine supporting bar arranged at an angle different from ninety degrees to the support bar and to the direction of motion, and a plural-ity of spring tines each comprising a flexible coiled spring portion defining an axis around which it is coiled and arranged for engaging around a respective one of the tine support sections such that the axis of the spring portion lies at said angle of said support section and a tine portion depending downwardly from the spring portion for engaging the ground in a harrowing action.
(2) The invention according to Claim 1 where-in each support bar is arranged to receive two spring tines.
(3) The invention according to Claim 1 where-in said two spring tines are arranged such that the down-wardly depending tine portions thereof are arranged at opposed ends of the tine support bar with the spring portions thereof leading from the downwardly depending tine portion inwardly toward a centre of said support bar.
(4) The invention according to Claim 1, 2 or 3 wherein the angle of the support bars to the support member is of the order of 45°.
(5) The invention according to Claim 1, 2 or 3 including means for drivingly reciprocating the support member along its length.
(6) The invention according to Claim 1, 2 or 3 including means for drivingly reciprocating the support member along its length, and wherein said means for drivingly reciprocating said bar is arranged such that a length of stroke thereof is less than the distance along the support member between one tine and the next adjacent tine.
(7) The invention according to Claim 1, 2 or 3 including a second support member parallel to and rear-wardly of said support member having attached thereto a plurality of support bars and tines in similar configura-tion to those of the support member.
(8) The invention according to Claim 1, 2 or 3 including a second support member parallel to and rear-wardly of said support member having attached thereto a plurality of support bars and tines in similar configura-tion to those of the support member, and means for drivingly reciprocating said support member and said second support member in directions along their length and in opposed phase.
(9) The invention according to Claim 1, 2 or 3 including a second support member parallel to and rear-wardly of said support member having attached thereto a plurality of support bars and tines in similar configura-tion to those of the support member, and means for drivingly reciprocating said support member and said second support member in directions along their length and in opposed phase, and wherein said means for driving-ly reciprocating said bar is arranged such that a length of stroke thereof is less than the distance along the support member between one tine and the next adjacent tine.
(10) The invention according to Claim 1, 2 or 3 wherein the frame means includes ground engaging wheel means for supporting said frame means and said elongate support member relative to the ground and means for adjusting the relative height of said ground engaging wheel means and said harrow tines whereby to adjust the depth of action of said harrow tines.
(11) The invention according to Claim 1, 2 or 3 wherein the frame means includes ground engaging wheel means for supporting said frame means and said elongate support member relative to the ground and means for adjusting the relative height of said ground engaging wheel means and said harrow tines whereby to adjust the depth of action of said harrow tines, and wherein said ground engaging wheel means comprises a plurality of packer wheels arranged in spaced relation longitudinally of said support member.
(12) The invention according to Claim 1, 2 or 3 including rigid subframe means, a plurality of packer wheels mounted on the subframe means for rolling movement thereof with the subframe in the direction of motion, means mounting the support member on the subframe whereby the harrow tines and packer wheels act on the ground sequentially in the direction of motion, said subframe means including means for attaching said subframe means to said frame means in two different orientations, in one of which said harrow tines act in advance of said packer wheels and in the other of which said harrow tines act rearwardly of said packer wheels.
(13) The invention according to Claim 1, 2 or - 3 including rigid subframe means, a plurality of packer wheels mounted on the subframe means for rolling movement thereof with the subframe in the direction of motion, means mounting the support member on the subframe whereby the harrow tines and packer wheels act on the ground sequentially in the direction of motion, said subframe means including means for attaching said subframe means to said frame means in two different orientations, in one of which said harrow tines act in advance of said packer wheels and in the other of which said harrow tines act rearwardly of said packer wheels, and wherein said frame means comprises a pair of rigid elongate bars and means for mounting said bars on a draw bar for extending generally rearwardly therefrom and pivotal about a hori-zontal axis whereby said bars can be raised and lowered, said subframe means including means for attachment to said bars at a forward end thereof and at a rearward end thereof and arranged symmetrically whereby said subframe means can be attached to said bars in reversed manner to provide said two different orientations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000529908A CA1280313C (en) | 1987-02-17 | 1987-02-17 | Harrow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000529908A CA1280313C (en) | 1987-02-17 | 1987-02-17 | Harrow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1280313C true CA1280313C (en) | 1991-02-19 |
Family
ID=4134989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000529908A Expired - Lifetime CA1280313C (en) | 1987-02-17 | 1987-02-17 | Harrow |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1280313C (en) |
-
1987
- 1987-02-17 CA CA000529908A patent/CA1280313C/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |