GB1588916A – Soil cultivating implements
– Google Patents
GB1588916A – Soil cultivating implements
– Google Patents
Soil cultivating implements
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Publication number
GB1588916A
GB1588916A
GB2201578A
GB2201578A
GB1588916A
GB 1588916 A
GB1588916 A
GB 1588916A
GB 2201578 A
GB2201578 A
GB 2201578A
GB 2201578 A
GB2201578 A
GB 2201578A
GB 1588916 A
GB1588916 A
GB 1588916A
Authority
GB
United Kingdom
Prior art keywords
rotation
implement
soil working
soil
axis
Prior art date
1977-11-02
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
Application number
GB2201578A
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.)
C Van der Lely NV
Original Assignee
C Van der Lely NV
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.)
1977-11-02
Filing date
1978-05-24
Publication date
1981-04-29
1978-05-24
Application filed by C Van der Lely NV
filed
Critical
C Van der Lely NV
1981-04-29
Publication of GB1588916A
publication
Critical
patent/GB1588916A/en
Status
Expired
legal-status
Critical
Current
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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
A01B33/00—Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs
A01B33/06—Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs with tools on vertical or steeply-inclined shaft
A01B33/065—Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs with tools on vertical or steeply-inclined shaft comprising a plurality of rotors carried by an elongate, substantially closed transmission casing, transversely connectable to a tractor
Description
(54)’IMPROVEMENTS IN OR RELATING TO SOIL
CULTIVATING IMPLEMENTS
(71) We, C. VAN DER LELY N.V., of 10, Weverskade, Maasland, The Netherlands, a Dutch Limited Liability Company, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be’ particularly described in and by the following statement: This invention relates to soil cultivating implements or machines of the kind which are intended primarily for the deep cultivation (as hereinafter defined) of soil and which comprise a plurality of soil working members that are rotatable about non-horizontal axes and supported by an elongate frame portion which extends substantially perpendicular, or at least transverse, to the intended direction of operative travel of the implement or machine, at least one of the soil working members being rotatable, during operation, in the opposite direction to at least one of the other soil working members and each of those members including two diametrically opposed and downwardly projecting cultivating tools. The expression “implement(s) or machine(s)” will be shortened to “implement(s3” alone throughout the remainder of this specification for the sake of brevity.
According to the invention, there is provided a soil cultivating implement of the kind set forth, wherein the spacing between the axes of rotation of immediately neighbouring soil working members has a magnitude of substantially 750 millimetres (29B inches) and the paths that are traced by the cultivating tools of immediately neighbouring soil working members during rotation thereof overlap one another by not less than substantially 250 millimetres (9.8 inches) measured along the line joining the axes of rotation of those soil working members.
For a better understanding of the invention, and to show how the same may be carried into effect, reference will now be made, by way of example, to the accompanying drawings, in which:
Figure 1 is a plan view of a soil cultivating implement in accordance with the invention connected to the rear of an agricultural tractor,
Figure 2 is a side elevation of the implement of Figure 1,
Figure 3 is a section, to an enlarged scale, taken on the line III–III in Figure 2,
Figure 4 is an elevation as seen in the direction indicated by an arrow IV in Figure 3, and
Figure 5 is an elevation as seen in the direction indicated by an arrow V in Figure 3.
Referring to the accompanying drawings, the
soil cultivating implement that is illustrated
therein is an implement which is intended primarily for the deep cultivation of soil. The
term “deep cultivation” is to be interpreted as
meaning cultivation to a depth below ground level of not less than 400 millimetres (15 3/4
inches). The soil cultivating implement has a
supporting frame 1 that is elongate in a direc
tion which is substantially horizontally trans
verse, and usually (as illustrated) substantially perpendicular, to the intended direction of
operative travel of the implement that is indi
cated in Figure 1 by an arrow A. The support
ing frame 1 comprises a leading transverse beam 2 and a rear transverse beam 3 that is parallel to the beam 2 but spaced behind the
latter with respect to the direction A. Two
supports 4 that both extend substantially horizontally parallel to the direction A rigidly
interconnect the frame beams 2 and 3 at short distances inwardly from the opposite ends of
those beams. Four connecting beams 5 also interconnect the frame beams 2 and 3 at spaced intervals between the supports 4, said connecting beams 5 also all being substantially horizontally parallel to the direction A. A hollow box-section frame portion 6 is elongate in a
direction that is substantially parallel to the lengths of the frame beams 2 and 3 and is
suspended from the four connecting beams 5
to which its top is releasably secured.
Four non-horizontally extending shafts 7 are rotatably mounted in the hollow frame portion 6 so as to lie in a single row with their parallel longitudinal axes (axes of rotation) a spaced apart from one another at regular intervals which have magnitudes of substantially 750 millimetres (29 < inches). It is noted that, as illustrated in the accompanying drawings, the non-horizontally extending shafts 7 are usually disposed in vertical or substantially vertical positions. The lowermost ends of the shafts 7 project downwardly from beneath the bottom of the hollow frame portion 6, the downwardly projecting portion of each shaft 7 being provided with a corresponding rotary soil working member that is generally indicated by the reference 8. Each rotary soil working member 8 comprises a flat carrier 9 which is symmetrical about a plane b (Figure 3) which contains the corresponding shaft axis a. There are thus two symmetrically identical portions 10 at opposite sides of each plane b. As seen in Figure 3 of the drawings, the two portions 10 of each carrier 9 taper towards their opposite ends, the result being that, again as seen in Figure 3 of the drawings in respect of one of the flat carriers 9, each such flat carrier is of substantially, although not exactly, rhombic configuration.
An imaginary line joining the two nearest opposite corners of each substantially rhombic carrier 9 intersects the corresponding shaft axis a, the disposition of each flat carrier 9 being such that the two downwardly projecting leading straight edges thereof, with respect to the intended direction of operative rotation B (Figures 1 and 3) of the member 8 concerned, are shorter in length than are the two downwardly projecting straight edges thereof which are rearmost with respect to the direction B.
The length of each flat carrier 9 as measured in the corresponding plane b in a direction that is perpendicular to the respective axis a is substantially 1 metre (39.37 inches).
The furthest remote ends of each flat carrier 9 are provided with corresponding syrrmetric- ally identical substantially vertically disposed flat supports 11 which project both above, and to a lesser extent beneath, the carrier 9 concerned. The connection between each support 11 and the corresponding carrier 9 is strength ened by the provision of a corresponding pair of outwardly convergent tie plates 11A which tie plates rigidly interconnect upper edge regions of the carrier 9 and the edges of that surface of the support 11 under consideration which faces generally towards the respective shaft 7. The surfaces of the flat supports 11 which face generally outwards away from the respective shafts 7 have the upper ends of corresponding arms 12 firmly but releasably secured to them by upper and lower bolts 14, said arms 12 being, like the supports 11, of flat strip-shaped configuration and each arm 12 forming part of a corresponding cultivating tool 13 that extends downwardly away from the associated support 11, said supports 11 and arms 12 thus being in parallel or substantially parallel relationship with the axes a. The supports 11 and arms 12 are so disposed with respect to the corresponding carriers 9 that the leading edges thereof, relative to the corresponding directions of rotation B, are further from the respective axes a than are the rear edges thereof. Thus, the inner flat side of each arm 12 that is nearest to the corresponding axis of rotation a is inclined at an acute angle to the corresponding plane b which contains that axis a.
The lower end 15 of each arm 12 is bent over obliquely forwardly with respect to the corresponding direction of rotation B (see Figures 3 and 5) and it will be noted from the former Figure of the drawings that each lower end 15 is not contained in the general plane of the corresponding arm 12 but is also bent inwardly in such a way that, as seen in
Figure 3, each lower end 15 is substantially tangential with respect to an imaginary circle centred upon the corresponding axis of rotation a. It will be apparent from Figure 5 of the drawings that each lower end 15 is, in fact, formed separately from the corresponding arm 12 and is rigidly secured to that arm by welding. Each lower end 15 defines a concave supporting surface to which a corresponding replaceable curved blade 16, having points at its opposite ends, is releasably secured by a pair of counter-sunk machine screws. Advantageously, although not illustrated in the drawings, each blade 16 is formed with two pairs of holes for the reception of the corresponding machine screws so that, when inevitable wear causes the blade 16 to become blunt, it can be temporarily removed and be subsequently replaced in an end-for-end reversed position thus bringing the other still sharp point into an operative position. The useful life of each curved blade 16 is thus effectively doubled.
The flat carrier 9 that forms part of each rotary soil working member 8 has such dimensions that the paths which are traced by the cultivating tools 13 of neighbouring members 8 when those members are in rotation overlap one another by a distance which is not less than substantially 250 millimetres (9.8 inches) measured along a line joining the respective axes a. Each shaft 7 is Drovided, inside the hollow frame portion 6, with a corresponding straight-toothed or spur-toothed pinion 17, the four relatively spaced pinions 17 being drivingly interconnected with one another by intervening pairs of straight-toothed or spurtoothed pinions 18 that may, in fact, be identical to the pinions 17. Each intermediate pinion 18 is mounted on a corresponding rotary shaft 19 which is parallel to the shafts 7 and which does not project to any significant extent from above or beneath the frame portion 6, the four shafts 7 and six shafts 19 all being arranged in a single row with their axes of rotation spaced apart from one another at regular intervals. One of the centre pair of shafts 19 has an upward extension through the top of the hollow frame portion 6 into an overlying gear box 20 which is carried by the supporting frame 1. Bevel pinions (not visible) inside the gear box 20 place the upward ex tension of the shaft 19 that has just been mentioned in driven connection with a shaft (not visible) that extends substantially horizontally parallel to the direction A. The rearmost end of this substantially horizontal shaft projects through the back of the gear box 20 into a change-speed gear 21 that is mounted at the rear of said gear box with respect to the direction A. A second shaft 22 that also extends substantially horizontally parallel to the direction A lies above the shaft which has just been discussed in parallel relationship therewith, the opposite ends of said shaft 22 projecting forwardly from the front of the gear box 20 and rearwardly from the back of the change-speed gear 21. The shaft 22 and the rear end of the shaft that is parallel thereto are splined inside the change-speed gear 21 and are arranged to receive the matchingly splined hubs of interchangeable pairs of pinions of different sizes. There are, preferably, at least two such pairs of co-operating pinions of different sizes which pairs can be exchanged for one another. The particular pair of straighttoothed or spur-toothed pinions which is chosen for use in the change-speed gear 21, and the arrangement thereof that is selected on the shafts in the change-speed gear, dictates the transmission ratio between the shaft 22 and the underlying and relatively parallel shaft and thus the speed at which all four of the soil working members 8 will rotate in response to a substantially standard speed of input rotation that is applied to the leading end of the shaft 22 when the implement is in use. To this end, the shaft 22 functions as a rotary input shaft and its leading splined end is arranged to be placed in driven connection with the power take-off shaft at the rear of an agricultural tractor or other operating vehicle by way of an intermediate telescopic transmission shaft 37, which is of a construction that is known per se, having universal joints at its opposite ends. The end of the shaft 22 that projects rearwardly from the change-speed gear 21 can be employed as a source of rotary power for driving the moving parts of some other agricultural implement, such as a seed drill or fertiliser distributor, that may be used in conjunction with the soil working implement of the present invention.
A pair of lugs 23 (Figure 2) projects downwardly from each horizontal support 4 at a location towards, but spaced from, the rearmost end of that support. Each pair of lugs 23 has the rear end of a corresponding forwardly projecting arm 24 pivotally arranged between them by a pin that interconnects said lugs and extends substantially horizontally parallel to the frame beams 2 and 3. The opposite leading end of each arm 24 carries a corresponding substantially horizontal axle shaft upon which a pneumatically tyred ground wheel 25 is mounted in a freely rotatable manner, each ground wheel 25 being located at that side of
the corresponding arm 24 which is nearer to the centre of the implement. A bracket 26 of
channel-shaped cross-section projects obliquely
upwardly and forwardly with respect to the
direction A from the leading frame beam 2 at
a location in register with the leading end of
the corresponding support 4, the uppermost
end of each bracket 26 being provided with a
corresponding pair of forwardly projecting lugs
27. Each pair of lugs 27 pivotally supports, by
way of a corresponding pair of trunnion pins,
the upper end of a manually crank-operable
adjuster 28, the lower end of each adjuster 28
being pivotally connected to the corresponding
underlying arm 24 at a location substantially
midway between the opposite ends of that arm.
Adjusters such as the adjusters 28 which are
illustrated somewhat diagrammatically in Fig
ures 1 and 2 of the drawings are well known
per se and, upon manual rotation of their
crank handles, become greater or shorter in
effective length, depending upon the direction
of rotation employed. It will thus readily be
seen that rotation of the crank handles of the
adjusters 28 will cause the corresponding arms
24 to be turned either upwardly or downwardly
about their pivotal connections to the lugs 23
thus moving the respective ground wheels 25
either bodily upwards or downwards relative
to the supporting frame 1.
The opposite ends of both the leading and
rear frame beams 2 and 3 of the supporting
frame 1 have the limbs of brackets 29 (Figures
1 and 2) which are of L-shaped cross-section
welded or otherwise rigidly secured to them,
said brackets 29 being disposed in obliquely
upwardly and forwardly inclined positions (see
Figure 2) so that the limbs thereof which are
not directly secured to the frame beams 2 and
3 afford inclined supporting surfaces whose
upper ends are further advanced with respect
to the direction A than are the lower ends
thereof. The upper ends of similarly inclined
arms 30 are firmly but releasably secured to
the upwardly and forwardly inclined support
ing surfaces of the brackets 29 by pairs of
bolts, said arms 30, which are straight, thus
extending downwardly and rearwardly with
respect to the direction A away from the corres
ponding brackets 29. The two arms 30 which
are both at one end of the supporting frame
1 have their lower ends secured to a carrier
31 which extends substantially horizontally
parallel to the direction A and it will be seen
from Figures 1 and 2 of the drawings that
each of the substantially symmetrically
identical carriers 3 1 has a corresponding shield
plate 32 secured to the side thereof which faces
inwardly towards one end of the corresponding
row of four rotary soil working members 8.
Each shield plate 32 extends substantially para
llel to the direction A but has a lower portion
thereof bent over outwardly to some extent at a
level beneath that of the corresponding carrier
31. The lower edges of the shield plates 32 are arranged to slide forwardly in the direction A over the ground surface when the implement is in use and are bevelled at their leading and rear ends to avoid digging into the soil when an undulation is met during operative progress in the direction A or during manoeuvring in the opposite direction. The shield plates 32 prevent stones and other potentially damaging hard objects from being flung laterally of the path of travel of the implement by the rapidly rotating soil working members 8 so that the danger of injury or damage to bystanders, livestock or property that is attributable to this cause is very greatly reduced, if not entirely eliminated. The shield plates 32 also co-operate to some extent with the immediately neighbouring soil working members 8 in cultivating the soil.
The rear frame beam 3 of the supporting frame is provided, at a location which is a short distance to the left of the centre thereof when the implement is viewed from the rear in the deriction A, with a holder 33 (Figure 1) of square cross-section in which holder a leg 34 of similar cross-section is upwardly and downwardly slidable, the holder 33 and leg 34 being upwardly and forwardly inclined from bottom to top at the same angle to the vertical, and in the same deriction, as are the four arms 30. The lowermost end of the leg 34 is provided with a ground-engaging foot 35 and said leg is formed, at several different horizontal levels, with transverse holes through any chosen one of which can be entered a locking pin which co-operates with horizontally registering holes in opposite walls of the holder 33. Figures 1 and 2 of the drawings show the foot 35 in a position in which it is well clear of contact with the ground but, when the locking pin co-operates with one of the holes that can be seen near the upper end of the leg 34 in Figure 2 of the drawings, the foot 35 will be in contact with the ground and will co-operate with the two ground wheels 25 in supporting the implement in a stable position when it is disconnected from an agricultural tractor or other operating vehicle. The leading frame beam 2 of the supporting frame 1 is provided, midway between the opposite ends of said beam 2, with a coupling member or trestle 36 that is of substantially triangular configuration as seen in front or rear elevation.
The coupling member or trestle 36 is constructed and arranged for connection to the free ends of the upper and lower lifting links of a three-point lifting device or hitch at the rear of an agricultural tractor or other operating vehicle in a manner that is generally known per se and that is illustrated somewhat diagrammatically in Figures 1 and 2 of the drawings. The apex of the coupling member or trestle 36 comprises a pair of horizontally spaced apart substantially vertical plates and it will be seen from the drawings that said plates are connected, for strengthening purposes, to locations which are close to the rear ends of the two inner beams 5 by downwardly and rearwardly divergent tie beams.
In the use of the soil cultivating implement that has been described in performing deep cultivation of land, its coupling member or trestle 36 is connected to the three-point lifting device or hitch at the rear of an agricultural tractor or other operating vehicle and the forwardly projecting leading end of the shaft 22 of the gear box 20 is placed in driven connection with the rear power take-off shaft of the same tractor or other vehicle by way of the aforementioned known telescopic transmission shaft 37 which has universal joints at its opposite ends. Adjustments that may, if needed, be made before work commences include setting the maximum depth to which the blades arms 12 of the soil working members 8 will be able to penetrate into the soil by moving the ground wheels 25 either bodily upwards or downwards relative to the supporting frame 1 employing the manually operable adjusters 28 for that purpose. For most deep cultivation purposes, the ground wheels 25 will be set at levels, relative to the supporting frame 1, which are such that the bladed arms 12 will be able to work the soil to a depth below ground level of not less than substantially 450 millimetres (17.7 inches). The speed at which the soil working members 8 will revolve in response to a substantially constant input speed of rotation applied to the leading end of the shaft 22 may be increased or decreased, as necessary, by establishing an appropriate transmission ratio inside the change-speed gear 21. These adjustments will be made principally having regard to the nature and condition of the soil that is to be dealt with and the particular purpose for which that soil is required after cultivation. It will be seen from Figure 1 of the drawings that the direction of rotation B of each soil working member 8 is opposite to that of the or each of its immediate neighbours in the row of four such members 8 and that the four strips of land which are worked by the individual members 8 overlap one another to a considerable extent so that a single broad strip of deeply cultivated soil results. The members 8 at the lowermost ends of the shafts 7 are, of course, angularly staggered around the axes a relative to one another in such a way that said members will not foul one another in the regions of overlap between them.
The construction of the implement is such that the extent of the overlap between the substantially one metre diameter circles that are traced by the bladed arms 12 which principally afford the cultivating tools 13 of two immediately neighbouring soil working members 8, when those members are in rotation, is not less than substantially 250 millimetres which is substantially one-third of the distance between the axes of rotation a of those two members 8. The soil that has been worked by the members 8 is left with a substantially flat upper surface and this is attributable to the specific form of the flat tool carriers 9 which has been described above. It is noted that each rotary soil working member 8 has only two cultivating tools 13, which tools are diametrically opposed, and that, as a result, the power consumption of the implement for deep cultivation is not a lot higher than is required for shallower cultivation despite the greater working depth and the considerable degree of overlap between the amembers 8. As previously mentioned, the shield plates 23 co-operate with the two members 8 at the opposite ends of the row of four such members, the form of cooperation being such that there is not very much, if any, ridging of the soil at the opposite ends of the broad strip thereof which is worked by the implement.
WHAT WE CLAIM IS:- 1. A soil cultivating implement of the kind set forth, wherein the spacing between the axes of rotation of immediately neighbouring soil working members has a magnitude of substantially 750 millimetres (291r inches) and the paths that are traced by the cultivating tools of immediately neighbouring soil working members during rotation thereof overlap one another by not less than substantially 250 millimetres (9.8 inches) measured along a line joining the axes of rotation of those soil working members.
2. An implement as claimed in claim 1, wherein each cultivating tool comprises an arm which projects downwardly from its fasening location in parallel or substantially parallel relationship with the axis of rotation of the corresponding soil working member, said arm carrying a soil working blade.
3. An implement as claimed in claim 2, wherein each of said arms is of strip-shaped configuration and is so disposed that the width of the strip is in non-perpendicularly inclined relationship with an imaginary line extending radially from the axis of rotation of the corresponding soil working member.
4. An implement as claimed in claim 3, wherein the leading edge of each arm, with respect to the intended direction of operative rotation of the corresponding soil working member, is further from the axis of rotation of that member than is the trailing rear edge thereof.
5. An implement as claimed in any one of claims 2 to 4, wherein the arms of each cultivating tool are secured to the opposite ends of a flat carrier of that tool which is in perpendicular or substantially perpendicular relationship with the axis of rotation of the soil working member concerned, said flat carrier comprising two substantially coplanar portions which both taper towards their free ends away from said axis of rotation.
6. An implement as claimed in claim 5, wherein each flat carrier is of substantially rhombic shape when viewed in a direction parallel to the axis of rotation of the soil working member of which it forms a part, and wherein an imaginary line interconnecting the two nearest corners of each substantially rhombic carrier intersects the axis of rotation of the soil working member concerned.
7. An implement as claimed in claim 6, wherein the leading edges of the two portions of each flat carrier which are at opposite sides of the corresponding axis of rotation, with respect to the intended direction of operative rotation of the respective soil working member, are shorter in length than are the edges of the same portions which trail with respect to that direction.
8. An implement as claimed in any one of
claims 5 to 7, wherein the arm of each
cultivating tool is in perpendicular or sub
stantially perpendicular relationship with the
longitudinal centre line/major axis of the corresponding flat carrier.
9. An implement as claimed in any one of claims 2 to 8, wherein each soil working blade is of curved configuration and is so constructed and arranged that it can occupy a chosen one of a plurality of positions relative to the corresponding arm.
10. A soil cultivating implement of the kind set forth, substantially as hereinbefore described with reference to the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (10)
**WARNING** start of CLMS field may overlap end of DESC **. the members 8 is left with a substantially flat upper surface and this is attributable to the specific form of the flat tool carriers 9 which has been described above. It is noted that each rotary soil working member 8 has only two cultivating tools 13, which tools are diametrically opposed, and that, as a result, the power consumption of the implement for deep cultivation is not a lot higher than is required for shallower cultivation despite the greater working depth and the considerable degree of overlap between the amembers 8. As previously mentioned, the shield plates 23 co-operate with the two members 8 at the opposite ends of the row of four such members, the form of cooperation being such that there is not very much, if any, ridging of the soil at the opposite ends of the broad strip thereof which is worked by the implement. WHAT WE CLAIM IS:-
1. A soil cultivating implement of the kind set forth, wherein the spacing between the axes of rotation of immediately neighbouring soil working members has a magnitude of substantially 750 millimetres (291r inches) and the paths that are traced by the cultivating tools of immediately neighbouring soil working members during rotation thereof overlap one another by not less than substantially 250 millimetres (9.8 inches) measured along a line joining the axes of rotation of those soil working members.
2. An implement as claimed in claim 1, wherein each cultivating tool comprises an arm which projects downwardly from its fasening location in parallel or substantially parallel relationship with the axis of rotation of the corresponding soil working member, said arm carrying a soil working blade.
3. An implement as claimed in claim 2, wherein each of said arms is of strip-shaped configuration and is so disposed that the width of the strip is in non-perpendicularly inclined relationship with an imaginary line extending radially from the axis of rotation of the corresponding soil working member.
4. An implement as claimed in claim 3, wherein the leading edge of each arm, with respect to the intended direction of operative rotation of the corresponding soil working member, is further from the axis of rotation of that member than is the trailing rear edge thereof.
5. An implement as claimed in any one of claims 2 to 4, wherein the arms of each cultivating tool are secured to the opposite ends of a flat carrier of that tool which is in perpendicular or substantially perpendicular relationship with the axis of rotation of the soil working member concerned, said flat carrier comprising two substantially coplanar portions which both taper towards their free ends away from said axis of rotation.
6. An implement as claimed in claim 5, wherein each flat carrier is of substantially rhombic shape when viewed in a direction parallel to the axis of rotation of the soil working member of which it forms a part, and wherein an imaginary line interconnecting the two nearest corners of each substantially rhombic carrier intersects the axis of rotation of the soil working member concerned.
7. An implement as claimed in claim 6, wherein the leading edges of the two portions of each flat carrier which are at opposite sides of the corresponding axis of rotation, with respect to the intended direction of operative rotation of the respective soil working member, are shorter in length than are the edges of the same portions which trail with respect to that direction.
8. An implement as claimed in any one of
claims 5 to 7, wherein the arm of each
cultivating tool is in perpendicular or sub
stantially perpendicular relationship with the
longitudinal centre line/major axis of the corresponding flat carrier.
9. An implement as claimed in any one of claims 2 to 8, wherein each soil working blade is of curved configuration and is so constructed and arranged that it can occupy a chosen one of a plurality of positions relative to the corresponding arm.
10. A soil cultivating implement of the kind set forth, substantially as hereinbefore described with reference to the accompanying drawings.
GB2201578A
1977-11-02
1978-05-24
Soil cultivating implements
Expired
GB1588916A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
NL7712060A
NL7712060A
(en)
1977-11-02
1977-11-02
SOIL WORKING MACHINE.
Publications (1)
Publication Number
Publication Date
GB1588916A
true
GB1588916A
(en)
1981-04-29
Family
ID=19829467
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB2201578A
Expired
GB1588916A
(en)
1977-11-02
1978-05-24
Soil cultivating implements
Country Status (4)
Country
Link
DE
(1)
DE2847196A1
(en)
FR
(1)
FR2407651A1
(en)
GB
(1)
GB1588916A
(en)
NL
(1)
NL7712060A
(en)
1977
1977-11-02
NL
NL7712060A
patent/NL7712060A/en
not_active
Application Discontinuation
1978
1978-05-24
GB
GB2201578A
patent/GB1588916A/en
not_active
Expired
1978-10-30
DE
DE19782847196
patent/DE2847196A1/en
not_active
Withdrawn
1978-10-31
FR
FR7830803A
patent/FR2407651A1/en
active
Pending
Also Published As
Publication number
Publication date
NL7712060A
(en)
1979-05-04
DE2847196A1
(en)
1979-05-03
FR2407651A1
(en)
1979-06-01
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1990-05-16
Soil cultivating implements
GB1588915A
(en)
1981-04-29
Soil cultivating implements
US4136741A
(en)
1979-01-30
Soil cultivating implement
Legal Events
Date
Code
Title
Description
1981-07-30
PS
Patent sealed
1984-02-08
PCNP
Patent ceased through non-payment of renewal fee
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