CA2782822C - Soil tillage implements and shear wheels for use with tractors - Google Patents
Soil tillage implements and shear wheels for use with tractors Download PDFInfo
- Publication number
- CA2782822C CA2782822C CA2782822A CA2782822A CA2782822C CA 2782822 C CA2782822 C CA 2782822C CA 2782822 A CA2782822 A CA 2782822A CA 2782822 A CA2782822 A CA 2782822A CA 2782822 C CA2782822 C CA 2782822C
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- Canada
- Prior art keywords
- soil
- implement
- blade housing
- housing plate
- tilling
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Classifications
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- 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
- A01B35/00—Other machines for working soil not specially adapted for working soil on which crops are growing
- A01B35/20—Tools; Details
- A01B35/22—Non-rotating tools; Resilient or flexible mounting of rigid tools
- A01B35/26—Rigid tools
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- 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
- A01B35/00—Other machines for working soil not specially adapted for working soil on which crops are growing
- A01B35/02—Other machines for working soil not specially adapted for working soil on which crops are growing with non-rotating tools
- A01B35/10—Other machines for working soil not specially adapted for working soil on which crops are growing with non-rotating tools mounted on tractors
- A01B35/14—Other machines for working soil not specially adapted for working soil on which crops are growing with non-rotating tools mounted on tractors with rigid tools
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Soil Working Implements (AREA)
Abstract
An implement for tilling soil has a frame, a housing plate and a plurality of shearing blades mounted to the blade housing plate in vertically spaced apart relation and oriented substantially parallel to the surface of the soil. The plurality of shearing blades is mounted to the blade housing plate and are each deflectable upon contacting an obstacle in the soil. A method is provided for decompacting a soil terrain by making a first tilling pass in a first direction with the implement for tilling soil thereby shearing the soil terrain into layers, lifting the sheared soil and allowing it to settle, and then making a second pass in a direction diagonal to the first pass.
Description
SOIL TILLAGE IMPLEMENTS AND SHEAR WHEELS FOR USE WITH TRACTORS
FIELD OF THE INVENTION
The present invention relates to the field of agricultural equipment, and more particularly to soil tillage implements for decompacting soil terrain.
s BACEGROUND OF THE INVENTION
Most of the world's soils are topographically classified as clay type soils.
Soils are primarily composed of mixtures of clay and sand. Soils are compacted, naturally compactive, or compactable at a ratio which is proportionate to the amount of clay in the soil. The arability of soils is significantly impacted by the composition ratio of clay to sand. The sand component in will absorb water and nutrients, but it is unable to retain these elements. Clay can retain nutrients, but is poor at absorbing water. The stronger molecular attraction and cohesion forces of clay cause individual clay particles to mutually cohere. This condition, known as colloidal clay hysteresis, prevents a clay soil mass from molecularly absorbing the given surface rainwater and humus. Clay tends to become tightly compacted as it loses water and 15 dies out. Although rich in nutrients, the clay may become so compacted and hard, that plant roots cannot penetrate the clay to access the nutrients. Good arable soil has a mix of clay to retain nutrients and sand to absorb water and loosen and aerate the clay and permit drainage. The world's best agricultural soils are deep foams. Deep loam are a mixture of sand and clay in approximately a 1:1 ratio. Soils having such a mixture to a depth of about 3 20 feet are ideal for growing_ Typically the soils rest upon a high percentage clay subsoil.
Warns do not crack open as readily as clay topsoil when they dry. Thus moisture from below the surface of the loam soils is not lost easily lost, since cracks are not present to permit moisture to escape. Regions where the soil mixture is lacking either adequate clay or lacking adequate sand will have land which is less suitable for growing crops. It is believed that soil management techniques which intermix clay with sand can improve the quality of soil, and increase the arability of the land in regions previously having only marginally arable soil. The intermixing of clay and sand first requires the decompacting of clays. Even in areas where there is an adequate (though not ideal) mix of soil and clay, the clay content may be compacted, and therefore unable to absorb surface water needed for optimal plant growth.
Decompacting the clay can substantially improve soil quality and arability.
It is an object of the present invention to provide an implement for tilling soil which is effective to decompact high clay content soils.
It is a further object of the present invention to provide a method of decompactIng soil.
It is yet another object of the present invention to a shear wheel for a tractor which provides improved traction and which does not exacerbate the compacting of soils.
SUMMARY OF THE INVENTION
There is disclosed an implement for tilling soil, having a frame and a means for coupling to a traction vehicle, and being capable of being pulled by the traction vehicle in a direction of travel. The frame bears a blade housing plate and a plurality of shearing blades mounted to the blade housing plate in vertically spaced apart relation and oriented substantially parallel to the surface of the soil. The plurality of shearing blades are mounted to the blade housing plate so as to be deflectable to an out of the way position upon contacting an obstacle in the soil.
A tractor shear wheel is provided for moving on soil terrain. The tractor shear wheel comprises a rotatable hub having a tractor axle mounting and at least one rim spaced radially outward from the hub. A plurality of paddles is angularly offset from one another and extends radially outward from the hub. The plurality of paddles have radially outermost ends which are fixed to the at least one rim. The tractor shear wheel rides on the soil terrain on the radial outermost ends of the paddles.
A method is provided for decompacting a soil terrain. The first step in the method is making a first tilling pass in a first direction along the terrain with an implement for tilling soil thereby shearing the soil terrain into layers, lifting the sheared soil and allowing it to settle. The implement for tilling soil comprises a frame having a means for coupling to a traction vehicle and being capable of being pulled by the traction vehicle in a direction of travel. The frame bears a blade housing plate and a plurality of shearing blades mounted to said blade housing plate in vertically spaced apart relation and oriented substantially parallel to the surface of the soil. The second step in the method is making a second tilling pass, in a direction diagonal to said first pass, along the terrain with said implement for tilling soil, further shearing the soil terrain into layers, lifting the sheared soil and allowing it to settle.
Subsequent tilling passes may be made in the direction of the first pass or the second pass at a depth deeper within the soil terrain.
An apparatus is provided for decompacting of soil terrain comprising a traction vehicle fitted with a plurality of tractor wheels. Each of the tractor wheels has a rotatable hub having a tractor axle mounting; at least one rim spaced radially outward from said hub.
A plurality of paddles, angularly offset from one another, extend radially outward from the hub. The paddles have radially outermost ends and are fixed to the at least one rim.
The tractor wheel rides on the soil terrain on the radial outermost ends of the paddles. The traction vehicle coupled to an implement for tilling soil having a frame bearing a blade housing plate a plurality of shearing blades mounted to the blade housing plate in vertically spaced apart relation and oriented substantially parallel to the surface of the soil.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a side view of a traction vehicle with soil tillage implements and shear wheels according to a preferred embodiment of the present invention.
Fig. 2 is a partial top view of the soil tillage implement shown in Fig. 1.
Fig. 3 is a top plan view of a plurality of shearing blades according to the present invention.
Fig. 4 is an enlarged perspective view of a blade housing according to a first embodiment of the present invention.
Fig. 5 is an enlarged perspective view of a blade housing according to a preferred embodiment of the present invention.
is Fig. 6 is an enlarged partial perspective view of a blade housing, having a trenching wedge and injector according to an embodiment of the present invention.
Fig. 7 is a side view of a tilling implement shown tilling a soil terrain, said soil terrain being shown partially in section.
FIELD OF THE INVENTION
The present invention relates to the field of agricultural equipment, and more particularly to soil tillage implements for decompacting soil terrain.
s BACEGROUND OF THE INVENTION
Most of the world's soils are topographically classified as clay type soils.
Soils are primarily composed of mixtures of clay and sand. Soils are compacted, naturally compactive, or compactable at a ratio which is proportionate to the amount of clay in the soil. The arability of soils is significantly impacted by the composition ratio of clay to sand. The sand component in will absorb water and nutrients, but it is unable to retain these elements. Clay can retain nutrients, but is poor at absorbing water. The stronger molecular attraction and cohesion forces of clay cause individual clay particles to mutually cohere. This condition, known as colloidal clay hysteresis, prevents a clay soil mass from molecularly absorbing the given surface rainwater and humus. Clay tends to become tightly compacted as it loses water and 15 dies out. Although rich in nutrients, the clay may become so compacted and hard, that plant roots cannot penetrate the clay to access the nutrients. Good arable soil has a mix of clay to retain nutrients and sand to absorb water and loosen and aerate the clay and permit drainage. The world's best agricultural soils are deep foams. Deep loam are a mixture of sand and clay in approximately a 1:1 ratio. Soils having such a mixture to a depth of about 3 20 feet are ideal for growing_ Typically the soils rest upon a high percentage clay subsoil.
Warns do not crack open as readily as clay topsoil when they dry. Thus moisture from below the surface of the loam soils is not lost easily lost, since cracks are not present to permit moisture to escape. Regions where the soil mixture is lacking either adequate clay or lacking adequate sand will have land which is less suitable for growing crops. It is believed that soil management techniques which intermix clay with sand can improve the quality of soil, and increase the arability of the land in regions previously having only marginally arable soil. The intermixing of clay and sand first requires the decompacting of clays. Even in areas where there is an adequate (though not ideal) mix of soil and clay, the clay content may be compacted, and therefore unable to absorb surface water needed for optimal plant growth.
Decompacting the clay can substantially improve soil quality and arability.
It is an object of the present invention to provide an implement for tilling soil which is effective to decompact high clay content soils.
It is a further object of the present invention to provide a method of decompactIng soil.
It is yet another object of the present invention to a shear wheel for a tractor which provides improved traction and which does not exacerbate the compacting of soils.
SUMMARY OF THE INVENTION
There is disclosed an implement for tilling soil, having a frame and a means for coupling to a traction vehicle, and being capable of being pulled by the traction vehicle in a direction of travel. The frame bears a blade housing plate and a plurality of shearing blades mounted to the blade housing plate in vertically spaced apart relation and oriented substantially parallel to the surface of the soil. The plurality of shearing blades are mounted to the blade housing plate so as to be deflectable to an out of the way position upon contacting an obstacle in the soil.
A tractor shear wheel is provided for moving on soil terrain. The tractor shear wheel comprises a rotatable hub having a tractor axle mounting and at least one rim spaced radially outward from the hub. A plurality of paddles is angularly offset from one another and extends radially outward from the hub. The plurality of paddles have radially outermost ends which are fixed to the at least one rim. The tractor shear wheel rides on the soil terrain on the radial outermost ends of the paddles.
A method is provided for decompacting a soil terrain. The first step in the method is making a first tilling pass in a first direction along the terrain with an implement for tilling soil thereby shearing the soil terrain into layers, lifting the sheared soil and allowing it to settle. The implement for tilling soil comprises a frame having a means for coupling to a traction vehicle and being capable of being pulled by the traction vehicle in a direction of travel. The frame bears a blade housing plate and a plurality of shearing blades mounted to said blade housing plate in vertically spaced apart relation and oriented substantially parallel to the surface of the soil. The second step in the method is making a second tilling pass, in a direction diagonal to said first pass, along the terrain with said implement for tilling soil, further shearing the soil terrain into layers, lifting the sheared soil and allowing it to settle.
Subsequent tilling passes may be made in the direction of the first pass or the second pass at a depth deeper within the soil terrain.
An apparatus is provided for decompacting of soil terrain comprising a traction vehicle fitted with a plurality of tractor wheels. Each of the tractor wheels has a rotatable hub having a tractor axle mounting; at least one rim spaced radially outward from said hub.
A plurality of paddles, angularly offset from one another, extend radially outward from the hub. The paddles have radially outermost ends and are fixed to the at least one rim.
The tractor wheel rides on the soil terrain on the radial outermost ends of the paddles. The traction vehicle coupled to an implement for tilling soil having a frame bearing a blade housing plate a plurality of shearing blades mounted to the blade housing plate in vertically spaced apart relation and oriented substantially parallel to the surface of the soil.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a side view of a traction vehicle with soil tillage implements and shear wheels according to a preferred embodiment of the present invention.
Fig. 2 is a partial top view of the soil tillage implement shown in Fig. 1.
Fig. 3 is a top plan view of a plurality of shearing blades according to the present invention.
Fig. 4 is an enlarged perspective view of a blade housing according to a first embodiment of the present invention.
Fig. 5 is an enlarged perspective view of a blade housing according to a preferred embodiment of the present invention.
is Fig. 6 is an enlarged partial perspective view of a blade housing, having a trenching wedge and injector according to an embodiment of the present invention.
Fig. 7 is a side view of a tilling implement shown tilling a soil terrain, said soil terrain being shown partially in section.
Fig. 8 is a top view of a tilling implement shown tilling a soil terrain.
Fig. 9 is front view of a traction vehicle having tractor wheels according to an embodiment of the present invention.
Fig 10 is a side view of a first embodiment of the tractor wheel according to the present 6 invention.
Fig 11 is a side view of a second embodiment of the tractor wheel according to the present invention.
Fig 12 is a perspective view of the second embodiment of the tractor wheel of Fig. 11, DETAILED DESCRIPTION OF TI IL PREFERRED EMBODIMENT
Referring now to Fig 1 of the drawings, a traction vehicle 10 is shown making a tilling pass through a soil terrain in a direction of travel shown by the arrow "C". The surface of the soil is indicated by reference numeral 12. The traction vehicle 10 is fitted with tractor wheels 14.
An implement for tilling soil is shown by general reference numeral 16. The implement for tilling soil 16 has a frame 18. The frame 18 has a means for coupling to the traction vehicle represented by reference numeral 20. In Fig 1, the means for coupling 20 is shown as a standard three-point hitch. The means for coupling may also be equipped with hydraulic lifting cylinders 22, as best seen in Fig 2. It should be noted in Fig. 2 that the traction vehicle 10 and the hitch are not shown. The use of hydraulic cylinders 22 will permit the implement for tilling soil to be deployed at a desired height relative to the surface 12 of the soil. In this manner, the depth of tilling can be controlled, and the tilling of the soil to greater depths can be facilitated by carrying out multiple tilling passes through the soil, each with the implement for tilling soil 16 deployed at greater depths within the soil.
The entire implement for tilling 16 can be constructed from metal plates. The frame can be constructed from reinforced steel, such as I-beam, or box frame assemblies.
The particular selection and assembly of framing members is a routine matter which would be readily understood be a person skilled in designing and constructing farming implements.
The frame 18 bears a blade housing plate 24. As can be seen in Fig 2, it is preferred to have several blade housing plates 24 attached to the frame 18. The structural details of the implement for tilling will be discussed and illustrated in connection with a single blade housing plate, but it should be recalled that tilling implement 16 preferably several blade housing plates 24, mounted in a row. Each blade housing plate 24 has a sharpened leading edge 28. The phrase "leading edge" refers to the edge of the housing plate which would first contact the soil as the implement for tilling is pulled in a direction of travel (as identified by arrow "C" in Fig. 1). A sharpened tooth 30 projects forward of the leading edge 28 at a lower extent thereof. As can be seen in Figs. 1, 4 and 5, the blade housing plate 24 may be advantageously provided with a plurality of teeth 30. The teeth 30 are angled and they will bite downward into the soil as the implement is pulled through the soil. As the teeth bite downward a down draught is created which helps to maintain the stability of the implement 16 in the soil by keeping the shearing blades in contact with the soil, preventing wobbling of the implement or lifting of soil masses before the soil is sheared.
By way of example, the blade housing plate 24 may be constructed of alloy steel plate having thickness of 0.5 to 2.0 inches. Typically the housing may be approximately 4 feet high and approximately 4 feet long. The dimensions of the blade housing and the quality and strength of the steel used in its construction could be readily determined by a person skilled at designing and constructing farm implements, having regard to the overall desired tilling capacity for the implement 16, including coverage width for each tilling pass of the implement, the pulling strength of the traction vehicle for use with which the implement is designed, the required depth of tilling, and the hardness of the soil to be tilled.
As best seen in Figs 3 and 4, a plurality of shearing blades 26 are mounted to each blade housing plate 24 in vertically spaced apart relation. The shearing blades we oriented substantially parallel to the surface of the soil 12. The shearing blades 26 have sharpened leading edges 32 to enable the shearing blades 26 to cut or shear through the soil in layers.
The sharpened leading edges 32 can be created by insetting a high tensile sharpened steel knife into each leading edge, or (preferably) by machining a sharpened edge into the steel from which the shear blade is constructed. Machining the shear blades to create the sharpened leading edges is preferably accomplished by machining an inclined face on the leading edge of the shearing blade. The angle of inclination may be varied, but experience has shown that an angle in the range of 10-20 degrees is preferable. As a result of the vertically spaced apart arrangement of the shearing blades 26, the soil is sheared into several layers. The inclined face of the sharpened leading edge helps to raise the sheared soil from the blades. The sheared soil will then settle after the implement has passed. The particular number of shearing blades mounted to each housing plate is not a matter of importance to the present invention. The number of shearing blades may be selected based upon the desired thickness of the sheared layers of soil and the depth of the tilling to be achieved with each pass of the implement. By way of example, the implement may be constructed having five shearing blades in vertically spaced apart relation, with approximately 3 inches clearance between each shearing blade. This embodiment would efficiently slice soil into layers of about 3 inches in height.
As the implement is pulled at increasing speed along the direction of travel, the sheared layers of soil maw attain a sufficient momentum to weight ration to allow the soil to be lifted in a rooster tail arc. The arcing and then settling of the 3 inch layers of soil would allow the soil to become turbulent and crumble, with the result that the settled soil is less compacted.
Little, if any, of the soil is displaced laterally along the terrain by the use of the piesent invention.
It is preferable for the shearing blades 26 to be substantially sector shaped, having two leading edges 32, and a curved trailing edge 34. Each blade is provided with a mounting tongue 36 positioned between said two leading edges 32. The mounting tongue 36 defines an opening 38 for receiving a fastener 39 therethrough. The shearing blade 26 is pivotable about the fastener 39 (shown in dotted outline in Figs. 4 and 5) when the shearing blade is mounted to the blade housing plate 24.
As can be seen in Figures 3-5, the leading edges 32 of the shearing blades 26 extend outwardly and rearwardly from the mounting tongues 36 of the shearing blades 26. It is preferable, though not necessary for the extension to be at approximately a 45 degree angle.
The size of shearing blades may be varied as desired, having regard to the overall desired size and tilling capacity of the implement 16. By way of example, the shearing blades may be constructed to extend approximately 6 inches laterally outward from either side of the blade housing plate, for a total blade span of approximately 12 inches. The depth of the sector shape may also be approximately 6 inches. Typical thicknesses for the blades range between 0.5 and 1.0 inches. The use of larger or smaller shearing blades should be understood to be within the scope of the present invention. The shearing blades are constructed from alloy steel. The selection of steel strength and the thickness of the blades are within the competency of a person skilled in the art of designing and constructing farm implements.
The shearing blades 26 are deflectably mounted to the blade housing plate 24.
Various embodiments of the manner of mounting of the blades, and the particular direction of defection of the blades can be understood within the present invention.
In a preferred embodiments of the present invention, the shearing blades 26 may be bolt mounted to the blade housing plate 24. As illustrated in Figs. 4 and 5, the blade housing plate 24 defines a plurality of sockets 40 to lockingly receive a plurality of fasteners 39. The locking function can be accomplished by screw threading of the sockets, and the use of complementary threaded bolts as fasteners. When mounted, the shearing blades 26 will be pivotable about the fasteners, allowing the shear blades 26 to deflect laterally upon encountering soil obstacles 25. Typically when the implement 16 is being pulled in a direction of travel, about half of the shear blade 26 lies on either side of the blade housing plate 24. Upon encountering a soil obstacle 25, the shearing blade will pivot in a horizontal plane about the axis of the fastener (bolt) away from the obstade 25, allowing the implement 16 to continue working the soil without tripping the trip bar. in this manner, the present invention may afford increased efficiencies and a reduced incidence of damage to the shear blades 26. This deflection of a shearing blade 26 can be seen in Fig. 5.
In the alternate embodiment shown in Fig. 5, the blade housing plate 24 forms a dosed structure protecting the shearing blades 26. The blade housing plate 24 defines a plurality of horizontal slots 42 therethrough, each sized and positioned for throughpassage one of said shearing blades 26. The shearing blades 26 are mounted to the blade housing plate 24 so as to be deflectable to an out of the way position upon contacting an obstacle 25 in the soil.
Fig. 5 shows a blade 26 in a deflected position of one of the shearing blades 26.
The blade housing plate 24 defines a plurality of sockets 40 to lockingly receive the fasteners 39 (typically bolts) holding each of the shearing blades 26 in place. The blade housing 24 has means for buttressing the curved trailing edges 34 of the shearing blades.
The buttressing means could take several forms. In one example shown in Fig. 5, the buttressing means comprises a contact pin 46 (shown in dotted outline) seated within each horizontal slot 42 through the blade housing plate 24, to supportingly contact the curved trailing edge 34 of each of said shearing blades 26. Preferably the contact pins are threaded and can be threadingly engaged into a plurality of threaded recesses 44 within the blade housing plate 24. The contact between the trailing edge 34 of a shearing blade and its respective contact pin 46 will cause a groove to wear in the contact pin 46 over time. By having the contact pin 46 take the wear, the blade housing 24 is protected from wear. As the contact pin becomes worn, it can be adjusted to protrude far enough into the slot 42 of the housing to again make buttressing contact with the curved trailing edge 34 of the shearing blade 26.
The buttressing pressure of the contact pin against the shearing blade stabilizes it, preventing unnecessary wobble and/or pivotal movement of the shearing blade 34 about the fastener 39 (unless the shearing blade 26 contacts an obstacle 25). Additionally, as the implement 16 is pulled in a direction of travel and the shearing blades shearingly enage the soil, there is significant rearward pressure placed on the shearing blade, and specifically focused on the mounting tongue 36 at the opening for receiving 38 for the fastener 39. Considerable wearing of the fastener 39 and/or the opening 38 can occur. If the shearing blade 26 is buttressed as discussed here, the contact pin will take some of the pressure on the shearing blade 26 lessening the potential for wear on the fastener 39 and the opening 38 in the mounting tongue 38 for receiving the fastener.
As best seen in figs. 6 through 8, the implement 16 may further comprise a trenching wedge 48 which is contiguous with the trailing edge 50 of the housing plate 24. The trenching wedge 48 comprises a first trailing wing plate 52 and a second trailing wing plate 54, both of which extend outwardly from the trailing edge 50 of the housing plate 24 forming a V-shaped opening therebetween. The first 52 and second 54 wing plates span top to bottom with the trailing edge 50. The centre portion 56 of the wedge, where the first 52 and second 54 wing plates, preferably has a width similar to that of the blade housing plate 24.
The wings 52, 54 may be fixedly attached to the blade housing 24, or they may be integrally formed as a continuation of the blade housing 24. In use, as the implement 16 is pulled in a direction of travel "C", soil encounters the trenching wedge 48 after it has been sheared by the shearing blades, lifted by its motion across the blades, lifted, and loosed. When the soil encounters the one of the wing plates 52, 54 it is directed outwardly following the outward angles of the wing plates. When a plurality of blade housings having a corresponding plurality of trenching wedges are fixed to the frame 18 in a row, interference between the soils moved by neighboring wing plates on neighboring blade housings will cause soil to accumulate and be lifted.
An injector 60 is positioned above the trenching wedge 48 to receive the lifted soil, and to inject it downwardly behind the trenching wedge 48 into the lower levels of the soil. The use of the trenching wedge and injector are particularly advantageous in tilling environments having very sandy top soils and hard compacted clay sub-soils. In such soils the finely divided claim may have separated from the topsoil and become lost, leaving sandy top soils which have a tendency to drift. The use of this embodiment of the implement can result in a re-mixing of clay and sand components by injecting sand down into the clay subsoil. The presence of trenches created by the trenching wedge 48 further serve to hold rain water and prevent water loss due to surface runoff. The resultant tilled soil has been mixed by tilling, trenching, and injection, and water is better able to soak into soil treated in this manner.
The frame 18 can also be fitted with trip release bars 23 with articulating hinges that will allow the blade housing plates 24 to lift up out of Me soil In response to contaci with a predetermined resistance or a soil obstacle, such as rock, within the soil.
The trip bar 23 can be reset and the tilling implement 16 lowered back into contact with the soil after the obstruction has been cleared.
In a further embodiment of the present invention, a tractor shear wheel 62 is provided for moving on soil terrain. In Figs. 9-12, the shear wheel is identified by the general reerence numeral 62. The shear wheel comprises a rotatable hub 84 having a tractor axle mounting 66. At least one rim 68 is spaced radially outward from said hub 64.
Preferably there will be more than one rim 68. A plurality of paddles 70 which are angularly offset from one another extend radially outward from the hub 64. The paddles 70 having radially outermost ends 72.
The paddles 70 are fixed to the rim 68. The tractor shear wheel 62 rides on the soil terrain on the radial outermost ends 72 of the paddles 70. The outermost ends 72 may extend beyond the rims 68 as shown in Fig. 10. Alternatively, the outermost ends 72 may be kept flush with the rims 68. The outermost ends of the paddles may be pointed, as shown in Fig 10, or they may be blunt, as shown in Fig. 11. In use, the tractor shear wheels provide improved fraction when compared to rubber tires. The paddles initially engage the soil surface on a diagonal angle so as to provide maximum shearing or traction force when the paddle at the bottom of the rotation is at its maximum penetration depth within the soil. The leading edge of the next blade engages the soil surface at roughly a 45 degree angle which maximizes the size of its bite. Travel through the soil is made more efficient than if one relies on the treads of rubber tires. There is minimal contact between the shear wheel and the ground in the present invention. This results in a reduced tendency of the wheels to roll over, break or flatten crops which have emerged. There is shearing of the soil as the shear wheels contact the soil during rotation. This action of the paddles provides better traction to the traction vehicle and permits more efficient pulling of the tilling implement.
The action also provides some dissection of the soil, potentially breaking up heavily compacted sections, io The shear wheels according to the present invention do not waste work energy generated by the tractor in slipping or by pushing a wave of soil ahead of the wheels (as is the case with rubber tires).
In accordance with the present invention, there is disclosed a method for decompacting a soli terrain comprising the following steps. Making a first tilling pass in a first direction along the is terrain with an implement for tilling soil 16. As discussed above in greater detail, the implement 16 comprises a frame, having a means for coupling to a traction vehicle and being capable of being pulled by the traction vehicle in a direction of travel. The frame bears a blade housing plate. A plurality of shearing blades are mounted to the blade housing plate in vertically spaced apart relation and oriented substantially parallel to the surface of the soil.
20 During the first tilling Pass, as the shearing blades contact the soil terrain, it is sheared inlu layers, lifted, and then allowed to settle. The next step in the method is making a second tilling pass, in a direction diagonal to said first pass, along the terrain with said implement for tilling soil, further shearing the soil terrain into layers, lifting the sheared soil and allowing it to settle. Subsequent tilling passes may be made with the implement 16 for tilling soil either over the soil terrain in the same direction as the first passes or the second passes at a deeper depth within the soil terrain. By practicing this method, a user can horizontally shear hard clay soils into many thin layers and loosen the soil by lifting the layers a small distance and allowing them to settle into place. By repeating tilling passes by the implement at progressively greater depths, the subsoil can be decompacted at much greater depths than could be accomplished if soil was ploughed or turned over using conventional equipment If a user wishes to loosen the soil while maintaining the existing soil strata, the tiling implement can be used without the trenching wedge and injector. The tilling implement can be used in situations where it is desirable to mix the layers of soil, such as in soil reclamation efforts in desert or near desert regions. In such instance, surface sand could be injected downward into the deeper clay layers to create soil having more favorable clay to sand ratio.
It will be obvious to those skilled in the art that modifications of the present invention may be adopted without departing from the spirit of the present invention. Changes may be made in the combination dud arrangement of the various parts and elements, described heroin without departing from the spirit and scope of this invention. It will be apparent that the scope of the present invention is limited only by the claims set out hereinbelow.
Fig. 9 is front view of a traction vehicle having tractor wheels according to an embodiment of the present invention.
Fig 10 is a side view of a first embodiment of the tractor wheel according to the present 6 invention.
Fig 11 is a side view of a second embodiment of the tractor wheel according to the present invention.
Fig 12 is a perspective view of the second embodiment of the tractor wheel of Fig. 11, DETAILED DESCRIPTION OF TI IL PREFERRED EMBODIMENT
Referring now to Fig 1 of the drawings, a traction vehicle 10 is shown making a tilling pass through a soil terrain in a direction of travel shown by the arrow "C". The surface of the soil is indicated by reference numeral 12. The traction vehicle 10 is fitted with tractor wheels 14.
An implement for tilling soil is shown by general reference numeral 16. The implement for tilling soil 16 has a frame 18. The frame 18 has a means for coupling to the traction vehicle represented by reference numeral 20. In Fig 1, the means for coupling 20 is shown as a standard three-point hitch. The means for coupling may also be equipped with hydraulic lifting cylinders 22, as best seen in Fig 2. It should be noted in Fig. 2 that the traction vehicle 10 and the hitch are not shown. The use of hydraulic cylinders 22 will permit the implement for tilling soil to be deployed at a desired height relative to the surface 12 of the soil. In this manner, the depth of tilling can be controlled, and the tilling of the soil to greater depths can be facilitated by carrying out multiple tilling passes through the soil, each with the implement for tilling soil 16 deployed at greater depths within the soil.
The entire implement for tilling 16 can be constructed from metal plates. The frame can be constructed from reinforced steel, such as I-beam, or box frame assemblies.
The particular selection and assembly of framing members is a routine matter which would be readily understood be a person skilled in designing and constructing farming implements.
The frame 18 bears a blade housing plate 24. As can be seen in Fig 2, it is preferred to have several blade housing plates 24 attached to the frame 18. The structural details of the implement for tilling will be discussed and illustrated in connection with a single blade housing plate, but it should be recalled that tilling implement 16 preferably several blade housing plates 24, mounted in a row. Each blade housing plate 24 has a sharpened leading edge 28. The phrase "leading edge" refers to the edge of the housing plate which would first contact the soil as the implement for tilling is pulled in a direction of travel (as identified by arrow "C" in Fig. 1). A sharpened tooth 30 projects forward of the leading edge 28 at a lower extent thereof. As can be seen in Figs. 1, 4 and 5, the blade housing plate 24 may be advantageously provided with a plurality of teeth 30. The teeth 30 are angled and they will bite downward into the soil as the implement is pulled through the soil. As the teeth bite downward a down draught is created which helps to maintain the stability of the implement 16 in the soil by keeping the shearing blades in contact with the soil, preventing wobbling of the implement or lifting of soil masses before the soil is sheared.
By way of example, the blade housing plate 24 may be constructed of alloy steel plate having thickness of 0.5 to 2.0 inches. Typically the housing may be approximately 4 feet high and approximately 4 feet long. The dimensions of the blade housing and the quality and strength of the steel used in its construction could be readily determined by a person skilled at designing and constructing farm implements, having regard to the overall desired tilling capacity for the implement 16, including coverage width for each tilling pass of the implement, the pulling strength of the traction vehicle for use with which the implement is designed, the required depth of tilling, and the hardness of the soil to be tilled.
As best seen in Figs 3 and 4, a plurality of shearing blades 26 are mounted to each blade housing plate 24 in vertically spaced apart relation. The shearing blades we oriented substantially parallel to the surface of the soil 12. The shearing blades 26 have sharpened leading edges 32 to enable the shearing blades 26 to cut or shear through the soil in layers.
The sharpened leading edges 32 can be created by insetting a high tensile sharpened steel knife into each leading edge, or (preferably) by machining a sharpened edge into the steel from which the shear blade is constructed. Machining the shear blades to create the sharpened leading edges is preferably accomplished by machining an inclined face on the leading edge of the shearing blade. The angle of inclination may be varied, but experience has shown that an angle in the range of 10-20 degrees is preferable. As a result of the vertically spaced apart arrangement of the shearing blades 26, the soil is sheared into several layers. The inclined face of the sharpened leading edge helps to raise the sheared soil from the blades. The sheared soil will then settle after the implement has passed. The particular number of shearing blades mounted to each housing plate is not a matter of importance to the present invention. The number of shearing blades may be selected based upon the desired thickness of the sheared layers of soil and the depth of the tilling to be achieved with each pass of the implement. By way of example, the implement may be constructed having five shearing blades in vertically spaced apart relation, with approximately 3 inches clearance between each shearing blade. This embodiment would efficiently slice soil into layers of about 3 inches in height.
As the implement is pulled at increasing speed along the direction of travel, the sheared layers of soil maw attain a sufficient momentum to weight ration to allow the soil to be lifted in a rooster tail arc. The arcing and then settling of the 3 inch layers of soil would allow the soil to become turbulent and crumble, with the result that the settled soil is less compacted.
Little, if any, of the soil is displaced laterally along the terrain by the use of the piesent invention.
It is preferable for the shearing blades 26 to be substantially sector shaped, having two leading edges 32, and a curved trailing edge 34. Each blade is provided with a mounting tongue 36 positioned between said two leading edges 32. The mounting tongue 36 defines an opening 38 for receiving a fastener 39 therethrough. The shearing blade 26 is pivotable about the fastener 39 (shown in dotted outline in Figs. 4 and 5) when the shearing blade is mounted to the blade housing plate 24.
As can be seen in Figures 3-5, the leading edges 32 of the shearing blades 26 extend outwardly and rearwardly from the mounting tongues 36 of the shearing blades 26. It is preferable, though not necessary for the extension to be at approximately a 45 degree angle.
The size of shearing blades may be varied as desired, having regard to the overall desired size and tilling capacity of the implement 16. By way of example, the shearing blades may be constructed to extend approximately 6 inches laterally outward from either side of the blade housing plate, for a total blade span of approximately 12 inches. The depth of the sector shape may also be approximately 6 inches. Typical thicknesses for the blades range between 0.5 and 1.0 inches. The use of larger or smaller shearing blades should be understood to be within the scope of the present invention. The shearing blades are constructed from alloy steel. The selection of steel strength and the thickness of the blades are within the competency of a person skilled in the art of designing and constructing farm implements.
The shearing blades 26 are deflectably mounted to the blade housing plate 24.
Various embodiments of the manner of mounting of the blades, and the particular direction of defection of the blades can be understood within the present invention.
In a preferred embodiments of the present invention, the shearing blades 26 may be bolt mounted to the blade housing plate 24. As illustrated in Figs. 4 and 5, the blade housing plate 24 defines a plurality of sockets 40 to lockingly receive a plurality of fasteners 39. The locking function can be accomplished by screw threading of the sockets, and the use of complementary threaded bolts as fasteners. When mounted, the shearing blades 26 will be pivotable about the fasteners, allowing the shear blades 26 to deflect laterally upon encountering soil obstacles 25. Typically when the implement 16 is being pulled in a direction of travel, about half of the shear blade 26 lies on either side of the blade housing plate 24. Upon encountering a soil obstacle 25, the shearing blade will pivot in a horizontal plane about the axis of the fastener (bolt) away from the obstade 25, allowing the implement 16 to continue working the soil without tripping the trip bar. in this manner, the present invention may afford increased efficiencies and a reduced incidence of damage to the shear blades 26. This deflection of a shearing blade 26 can be seen in Fig. 5.
In the alternate embodiment shown in Fig. 5, the blade housing plate 24 forms a dosed structure protecting the shearing blades 26. The blade housing plate 24 defines a plurality of horizontal slots 42 therethrough, each sized and positioned for throughpassage one of said shearing blades 26. The shearing blades 26 are mounted to the blade housing plate 24 so as to be deflectable to an out of the way position upon contacting an obstacle 25 in the soil.
Fig. 5 shows a blade 26 in a deflected position of one of the shearing blades 26.
The blade housing plate 24 defines a plurality of sockets 40 to lockingly receive the fasteners 39 (typically bolts) holding each of the shearing blades 26 in place. The blade housing 24 has means for buttressing the curved trailing edges 34 of the shearing blades.
The buttressing means could take several forms. In one example shown in Fig. 5, the buttressing means comprises a contact pin 46 (shown in dotted outline) seated within each horizontal slot 42 through the blade housing plate 24, to supportingly contact the curved trailing edge 34 of each of said shearing blades 26. Preferably the contact pins are threaded and can be threadingly engaged into a plurality of threaded recesses 44 within the blade housing plate 24. The contact between the trailing edge 34 of a shearing blade and its respective contact pin 46 will cause a groove to wear in the contact pin 46 over time. By having the contact pin 46 take the wear, the blade housing 24 is protected from wear. As the contact pin becomes worn, it can be adjusted to protrude far enough into the slot 42 of the housing to again make buttressing contact with the curved trailing edge 34 of the shearing blade 26.
The buttressing pressure of the contact pin against the shearing blade stabilizes it, preventing unnecessary wobble and/or pivotal movement of the shearing blade 34 about the fastener 39 (unless the shearing blade 26 contacts an obstacle 25). Additionally, as the implement 16 is pulled in a direction of travel and the shearing blades shearingly enage the soil, there is significant rearward pressure placed on the shearing blade, and specifically focused on the mounting tongue 36 at the opening for receiving 38 for the fastener 39. Considerable wearing of the fastener 39 and/or the opening 38 can occur. If the shearing blade 26 is buttressed as discussed here, the contact pin will take some of the pressure on the shearing blade 26 lessening the potential for wear on the fastener 39 and the opening 38 in the mounting tongue 38 for receiving the fastener.
As best seen in figs. 6 through 8, the implement 16 may further comprise a trenching wedge 48 which is contiguous with the trailing edge 50 of the housing plate 24. The trenching wedge 48 comprises a first trailing wing plate 52 and a second trailing wing plate 54, both of which extend outwardly from the trailing edge 50 of the housing plate 24 forming a V-shaped opening therebetween. The first 52 and second 54 wing plates span top to bottom with the trailing edge 50. The centre portion 56 of the wedge, where the first 52 and second 54 wing plates, preferably has a width similar to that of the blade housing plate 24.
The wings 52, 54 may be fixedly attached to the blade housing 24, or they may be integrally formed as a continuation of the blade housing 24. In use, as the implement 16 is pulled in a direction of travel "C", soil encounters the trenching wedge 48 after it has been sheared by the shearing blades, lifted by its motion across the blades, lifted, and loosed. When the soil encounters the one of the wing plates 52, 54 it is directed outwardly following the outward angles of the wing plates. When a plurality of blade housings having a corresponding plurality of trenching wedges are fixed to the frame 18 in a row, interference between the soils moved by neighboring wing plates on neighboring blade housings will cause soil to accumulate and be lifted.
An injector 60 is positioned above the trenching wedge 48 to receive the lifted soil, and to inject it downwardly behind the trenching wedge 48 into the lower levels of the soil. The use of the trenching wedge and injector are particularly advantageous in tilling environments having very sandy top soils and hard compacted clay sub-soils. In such soils the finely divided claim may have separated from the topsoil and become lost, leaving sandy top soils which have a tendency to drift. The use of this embodiment of the implement can result in a re-mixing of clay and sand components by injecting sand down into the clay subsoil. The presence of trenches created by the trenching wedge 48 further serve to hold rain water and prevent water loss due to surface runoff. The resultant tilled soil has been mixed by tilling, trenching, and injection, and water is better able to soak into soil treated in this manner.
The frame 18 can also be fitted with trip release bars 23 with articulating hinges that will allow the blade housing plates 24 to lift up out of Me soil In response to contaci with a predetermined resistance or a soil obstacle, such as rock, within the soil.
The trip bar 23 can be reset and the tilling implement 16 lowered back into contact with the soil after the obstruction has been cleared.
In a further embodiment of the present invention, a tractor shear wheel 62 is provided for moving on soil terrain. In Figs. 9-12, the shear wheel is identified by the general reerence numeral 62. The shear wheel comprises a rotatable hub 84 having a tractor axle mounting 66. At least one rim 68 is spaced radially outward from said hub 64.
Preferably there will be more than one rim 68. A plurality of paddles 70 which are angularly offset from one another extend radially outward from the hub 64. The paddles 70 having radially outermost ends 72.
The paddles 70 are fixed to the rim 68. The tractor shear wheel 62 rides on the soil terrain on the radial outermost ends 72 of the paddles 70. The outermost ends 72 may extend beyond the rims 68 as shown in Fig. 10. Alternatively, the outermost ends 72 may be kept flush with the rims 68. The outermost ends of the paddles may be pointed, as shown in Fig 10, or they may be blunt, as shown in Fig. 11. In use, the tractor shear wheels provide improved fraction when compared to rubber tires. The paddles initially engage the soil surface on a diagonal angle so as to provide maximum shearing or traction force when the paddle at the bottom of the rotation is at its maximum penetration depth within the soil. The leading edge of the next blade engages the soil surface at roughly a 45 degree angle which maximizes the size of its bite. Travel through the soil is made more efficient than if one relies on the treads of rubber tires. There is minimal contact between the shear wheel and the ground in the present invention. This results in a reduced tendency of the wheels to roll over, break or flatten crops which have emerged. There is shearing of the soil as the shear wheels contact the soil during rotation. This action of the paddles provides better traction to the traction vehicle and permits more efficient pulling of the tilling implement.
The action also provides some dissection of the soil, potentially breaking up heavily compacted sections, io The shear wheels according to the present invention do not waste work energy generated by the tractor in slipping or by pushing a wave of soil ahead of the wheels (as is the case with rubber tires).
In accordance with the present invention, there is disclosed a method for decompacting a soli terrain comprising the following steps. Making a first tilling pass in a first direction along the is terrain with an implement for tilling soil 16. As discussed above in greater detail, the implement 16 comprises a frame, having a means for coupling to a traction vehicle and being capable of being pulled by the traction vehicle in a direction of travel. The frame bears a blade housing plate. A plurality of shearing blades are mounted to the blade housing plate in vertically spaced apart relation and oriented substantially parallel to the surface of the soil.
20 During the first tilling Pass, as the shearing blades contact the soil terrain, it is sheared inlu layers, lifted, and then allowed to settle. The next step in the method is making a second tilling pass, in a direction diagonal to said first pass, along the terrain with said implement for tilling soil, further shearing the soil terrain into layers, lifting the sheared soil and allowing it to settle. Subsequent tilling passes may be made with the implement 16 for tilling soil either over the soil terrain in the same direction as the first passes or the second passes at a deeper depth within the soil terrain. By practicing this method, a user can horizontally shear hard clay soils into many thin layers and loosen the soil by lifting the layers a small distance and allowing them to settle into place. By repeating tilling passes by the implement at progressively greater depths, the subsoil can be decompacted at much greater depths than could be accomplished if soil was ploughed or turned over using conventional equipment If a user wishes to loosen the soil while maintaining the existing soil strata, the tiling implement can be used without the trenching wedge and injector. The tilling implement can be used in situations where it is desirable to mix the layers of soil, such as in soil reclamation efforts in desert or near desert regions. In such instance, surface sand could be injected downward into the deeper clay layers to create soil having more favorable clay to sand ratio.
It will be obvious to those skilled in the art that modifications of the present invention may be adopted without departing from the spirit of the present invention. Changes may be made in the combination dud arrangement of the various parts and elements, described heroin without departing from the spirit and scope of this invention. It will be apparent that the scope of the present invention is limited only by the claims set out hereinbelow.
Claims (14)
1. An implement for tilling soil, comprising:
a frame, having a means for coupling to a traction vehicle and being capable of being pulled by the traction vehicle in a direction of travel, said frame bearing a blade housing plate; and, a plurality of shearing blades mounted to said blade housing plate in vertically spaced apart relation and oriented substantially parallel to the surface of the soil.
a frame, having a means for coupling to a traction vehicle and being capable of being pulled by the traction vehicle in a direction of travel, said frame bearing a blade housing plate; and, a plurality of shearing blades mounted to said blade housing plate in vertically spaced apart relation and oriented substantially parallel to the surface of the soil.
2. The implement of claim 1, wherein said plurality of shearing blades are mounted to the blade housing plate so as to be deflectable to an out of the way position upon contacting an obstacle in the soil.
3. The implement of claim 2, wherein the blade housing plate has a sharpened leading edge and a sharpened tooth projecting at a lower extent of the sharpened leading edge.
4. The implement of claim 3 wherein each of said shearing blades has a mounting tongue which defines an opening for receiving a fastener therethrough, and being pivotable about said fastener.
5. The implement of claim 4 wherein each of said shearing blades is substantially sector shaped, having two leading edges, and a curved trailing edge, said mounting tongue positioned between said two leading edges.
6. The implement of claim 5, wherein the blade housing plate defines a plurality of sockets to lockingly receive a plurality of said fasteners, thereby facilitating the deflectable mounting of said plurality of shearing blades to said blade housing plate.
7. The implement of claim 6, wherein the blade housing plate further defines a plurality of horizontal slots therethrough, each said slot sized and positioned for throughpassage one of said shearing blades.
8. The implement of claim 7, further comprising a means for buttressing the curved trailing edge of said shearing blades.
9. The implement of claim 8, wherein said means for buttressing comprises a contact pin seated within each horizontal slot through the blade housing plate, to supportingly contact the curved trailing edge of each of said shearing blades.
10. The implement of claim 9, further comprising a trenching wedge contiguous with trailing edge of the blade housing plate.
11. The implement of claim 10, wherein the trenching wedge comprises first and second trailing wing plates angled and extending outwardly from the trailing edge of the blade housing plate forming a V-shaped opening therebetween, the outward angle of the trailing wing plates directing soil outwardly forming trench walls as the implement is pulled in the direction of travel.
12. The implement of claim 11, further comprising an injector positioned above the trenching wedge to receive the soil and inject the soil downwardly to a lower level of the soil.
13. A method for decompacting a soil terrain comprising the steps of:
a. making a first tilling pass in a first direction along the terrain with an implement for tilling soil, comprising a frame, having a means for coupling to a traction vehicle and being capable of being pulled by the traction vehicle in a direction of travel, said frame bearing a blade housing plate; and, a plurality of shearing blades mounted to said blade housing plate in vertically spaced apart relation and oriented substantially parallel to the surface of the soil; thereby shearing the soil terrain into layers, lifting the sheared soil and allowing it to settle; and, b. making a second tilling pass, in a direction diagonal to said first pass, along the terrain with said implement for tilling soil, further shearing the soil terrain into layers, lifting the sheared soil and allowing it to settle.
a. making a first tilling pass in a first direction along the terrain with an implement for tilling soil, comprising a frame, having a means for coupling to a traction vehicle and being capable of being pulled by the traction vehicle in a direction of travel, said frame bearing a blade housing plate; and, a plurality of shearing blades mounted to said blade housing plate in vertically spaced apart relation and oriented substantially parallel to the surface of the soil; thereby shearing the soil terrain into layers, lifting the sheared soil and allowing it to settle; and, b. making a second tilling pass, in a direction diagonal to said first pass, along the terrain with said implement for tilling soil, further shearing the soil terrain into layers, lifting the sheared soil and allowing it to settle.
14. The method of claim 13 further comprising making a subsequent tilling pass, with said implement for tilling soil, over said soil terrain in the same direction as the first pass or the second pass at a deeper depth within the soil terrain.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11995108P | 2008-12-04 | 2008-12-04 | |
| US61/119,951 | 2008-12-04 | ||
| PCT/CA2009/001794 WO2010063126A1 (en) | 2008-12-04 | 2009-12-04 | Soil tillage implements and shear wheels for use with tractors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2782822A1 CA2782822A1 (en) | 2010-06-10 |
| CA2782822C true CA2782822C (en) | 2014-03-11 |
Family
ID=42232849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2782822A Expired - Fee Related CA2782822C (en) | 2008-12-04 | 2009-12-04 | Soil tillage implements and shear wheels for use with tractors |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA2782822C (en) |
| WO (1) | WO2010063126A1 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0317548A3 (en) * | 1984-06-30 | 1991-12-18 | Kuhn S.A. | Soil-working machine |
| WO1992002119A1 (en) * | 1990-08-03 | 1992-02-20 | Greencare Pty. Ltd. | A blade for a soil agitating device |
| FR2742964B1 (en) * | 1995-12-29 | 1998-02-27 | Evin Michel | DEVICE FOR SOFTENING THE FLOOR WITH BLADES FIXED ON A CHASSIS |
-
2009
- 2009-12-04 CA CA2782822A patent/CA2782822C/en not_active Expired - Fee Related
- 2009-12-04 WO PCT/CA2009/001794 patent/WO2010063126A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010063126A1 (en) | 2010-06-10 |
| CA2782822A1 (en) | 2010-06-10 |
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