CA1151431A - Swather - Google Patents
SwatherInfo
- Publication number
- CA1151431A CA1151431A CA000401975A CA401975A CA1151431A CA 1151431 A CA1151431 A CA 1151431A CA 000401975 A CA000401975 A CA 000401975A CA 401975 A CA401975 A CA 401975A CA 1151431 A CA1151431 A CA 1151431A
- Authority
- CA
- Canada
- Prior art keywords
- head
- self
- tractor unit
- propelled swather
- swather
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
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
- A01B73/00—Means or arrangements to facilitate transportation of agricultural machines or implements, e.g. folding frames to reduce overall width
- A01B73/02—Folding frames
- A01B73/06—Folding frames foldable about a vertical axis
- A01B73/067—Folding frames foldable about a vertical axis to a position essentially rearward of the axis, in relation to the direction of travel
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D57/00—Delivering mechanisms for harvesters or mowers
- A01D57/20—Delivering mechanisms for harvesters or mowers with conveyor belts
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Soil Sciences (AREA)
- Agricultural Machines (AREA)
Abstract
ABSTRACT
A self-propelled swather having a tractor unit with a central cutting head and two side cutting heads, one each being disposed on either side of the tractor unit and having the inner ends thereof behind and aligned with the outer ends of the central head. The central head is carried solely by the tractor while the side heads are carried at their inner ends by the tractor unit and at their outer ends by caster wheels. A pivot connection is provided between the inner ends of the side heads and the tractor unit so that the heads can swing from the work position to a transport position wherein the front cutting edges of the side heads are substantially parallel to the direction of travel of the tractor. Thus, the swather is readily maneuverable in the transport position and in width is only a fraction of the swather in its work position.
The cutting height of the individual heads may be separately adjustable, and a separate drive is provided to the knives, reels and conveyors of each head.
A self-propelled swather having a tractor unit with a central cutting head and two side cutting heads, one each being disposed on either side of the tractor unit and having the inner ends thereof behind and aligned with the outer ends of the central head. The central head is carried solely by the tractor while the side heads are carried at their inner ends by the tractor unit and at their outer ends by caster wheels. A pivot connection is provided between the inner ends of the side heads and the tractor unit so that the heads can swing from the work position to a transport position wherein the front cutting edges of the side heads are substantially parallel to the direction of travel of the tractor. Thus, the swather is readily maneuverable in the transport position and in width is only a fraction of the swather in its work position.
The cutting height of the individual heads may be separately adjustable, and a separate drive is provided to the knives, reels and conveyors of each head.
Description
~15~L~31 This invention relates to an agricultural machine of a type having a tractor unit and a number of heads, two side heads of which swing rearwardly to a transport position.
In harvesting equipment, such as swathers, it has been known to utilize a number of heads so as to cut a wide swath on each pass. A number of these types of swathers have three heads which are transversely aligned and wherein the two outer heads swing upwardly about their inner ends during transport. It has normally been proposed when the heads are transversely aligned to drive the knives and reels from a common drive. Generally, the known types of multi-head swathers have experience difficulties in the drive systems which are of a complex design. When the heads are in a transport position the machine is awkward to handle and is restricted as to relatively wide roadways and high overhead obstructions.
According to the present invention, there is provided a self-propelled swather including a tractor unit having a prime mover, a central head and a~pair of side heads. The central head is mounted in front of the tractor unit and has a front edge cutting means extending between opposite end edges. Cne each of the side heads is disposed Oll either side of the tractor unit, and each side head has a front edge cutting means extending between an inner end adjacent the tractor unit and an outer end, the inner ends of the side heads being behind and substantially aligned one each with opposite end edges of the central head when the s~/ ~
:
- ~51~31 side heads are in a work position. Pivot means connects the side heads to the tractor unit at the inner ends of the side heads and permit swinging rearwardly of each head to a transport position. In the transport position, the front edges of the side heads are substantially parallel to the normal direction of travel of the tractor unit.
In a specific embodiment of the invention, the central head is supported solely by the tractor unit, and each side head is supported at its inner end by the tractor unit and at its outer end by ground engaging means, such as a caster wheel.
Also in a specific embodiment of the invention each head has lndividual cutting height adjusting means, and the cutting means of each head is driven by separate power transmitting means from the tractor unit.
In the accompanying drawings, which show one embodiment as an example;
Figure 1 is a plan view of the swather in a working mode;
Figure 2 is a plan view the same as Figure 1, but with the heads in a transport position;
Figure 3 is an enlarged vie~of a pivot means between a side head and the tractor as seen from the line 3--3 of Figure l;
Figure 4 is a view as seen from line 4--4 of Figure 1 illustrating a height adjustment means;
Figure 5 is a view of a ground engaging means of the head as seen from line 5--5 of Figure 2;
Figure 6 is a side view of the ground engaging sb/
.
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~.~51431 means shown in Figure 5;
Figure 7 is a partial plan view showing an alternative connection between the tractor and side head; and Figure 8 is a rear view of an embodiment of a transfer conveyor mounted below the tractor unit.
The reference number 10 generally denotes the swather of the present invention, the swather 10 including a tractor unit 11, a central cutting head 12, and a pair of side cutting heads 13 and 14. The tractor unit 11 includes a body having a chassis with main frame members 36,36 carried by front drive wheels 37,37 and rear steering wheels 38,38. The drive wheels 37,37 are larger than the rear wheels 38,38 and the rear wheels may include a standard automotive type steer controlled from a operators position 42 in a cab near the front of the tractor unit. The tractor unit has a transversely disposed prime mover, such as a Diesel engine 40, with drive means 41 extending to the front wheels and controlled by a transmission system from the operators position 42. The tractor unit is also provided with power-take-off means in the form of a transversely extending shaft 43, the shaft 43 being driven from the engine 40 and the rotation of which is controllable from the operators position. The ends 44,44 of the shaft extend from opposite sides of the tractor unit. The tractor unit includes other structural features, many of which will be further described below.
l`he central head 12 has a main framel~*~r 15 extending across the-f~il wi*~h of the head at the back thereof, and the frame ~ember 15 is carried at the front of the tractor unit by brackets 16,16. me central head 12 has a front edge cutting means 17 extending full width of the head between opposite end edges 18,18 of the central pc/
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head. The front edge cutting means includes the conventional reciprocating knife 20 and a rotating reel 21 disposed above the knife. The knife 20 and reel 21 are both driven by a main drive shaft 22 which extends the width of the head; a belt drive 23 being shown at the left hand end of the head for driving the reel, and pitman crank mechanism (not shown) being provided for reciprocating the knife.
Rearwardly of the front edge cutting means.17 is a transversely extending conveying means 24 which is also driven by main drive shaft 22, the conveying means 24 for the central head including two endless belts, the upper flights of which are shown at 25 and 26. The drive mechanism (not shown) for the belts is adapted to drive the belts so that the upper flights 25 and 26 both travel in the same direction as indicated by arrows A and B.
Alternatively, the belt having upper flight 25 can be driven so that the upper flight thereof travels in the opposite direction, i.e. the direction indicated by the arrow C. The - central head 12 has a pair of outlets 27~28, one each being located inside of each of ends 18,18. When the conveyor belts are driven so that the upper flights 25 and 26 travel in opposite directions, as indicated by arrows C and B, the vegetation cut b-y the front edge cutting means 17 is divided and exits through both ol~tlets 27 and 28. I~ the belts are driven so that the upper flights 25 and 26 travel in the same directions, as indicated by arrows A and B, all the vegetation cut by the front edge cutting 17 of the central head is discharged via outlet 28 in a single sb/
.
, ,. ' '',, ~ ~
- ~51431 windrow as indicated at 30.
Eacll of the side heads 13 and 14 has a main frame member 55 and 65, respectively; a front edge cutting means 57 and 67, respectively; a reciprocating knife 60 and 70, respectively; a rotating reel 61 and 71, respectively; a main drive shaf* 62 and 72, respectively; and a belt drive 63 and 73, respectively; which correspond substantially to the frame member 15, front edge cutting means 17, reciprocating knife 20, rotating reel 21, main drive shaft 22 and belt drive 23 of the central head 12. Unlike the central head 12, the side heads 13 and 14 are carried only at inner ends 56 and 66, respectively, by the tractor unit 11, this being done through pivot mlans 58 and 68, which will be described in more detail below. The outer ends of the side heads 13 and 14 are carried on ground engaging means 69 and 79 respectively. Each of said heads 13 and 14 have oonveyor means 75 and 76 immediately behind the front edge cutting means 57 and 67 thereof and driven by means (not shown) from the main drive shaft 62 and 72 of the respective side head. Unlike the central head, side head 13 has a single outlet opening 64 at its inner end 56, and the conveyor means 75 and may include a single endless belt which has a top flight 77 adapted to travel in an inwardly direction towards outlet opening 64, as indicated by arrow D.
~le conveyor means 75 and 76 of the side heads may include two endless belts the same as that described in connection with the central head, but adapted to drive in the same direction, i.e., towards the tractor unit. With the use of exceptional long heads the use of the two endless belts may be more satisfactory than one very long belt. m e conveyor means 76 of the right hand head includes a top flight 78 which is driven towards outlet opening 74 at the inner end of the right head, as indicated by arrow E.
When the side heads 13 and 14 are in their work position, as shown in Figure 1, the inner ends 56 and 66 are pc/
S1~31 behind the central head 12 and substantially aligned with the opposite end edges 18,18 of the central head so that the width of the swath taken by the swather 10 is substantially equal to the total lengths of the three heads. For example, if each head is 25 feet in length, the total width of the swather is approximately 75 feet.
If the conveyor means of the central head is operated so that the travel of the upper flights 25 and 26 are opposite, the discharged veqetation is layed in two windrows which are jointed by the discharge of the two side heads. Two parallel wind~ows of substantially the same size are laid at a spacing sli~htly less than the total width of the central head.
The tractor has brackets 80,80 extending from opposite sides thereof and forming a bifurcated portion defining a pair of arms 89,89 terminating in vertically spaced ends 81,81 which provide journal openings 82,82 (Figure 3) in the pivot means 58. The journals receive the outer bearing ends 83,83 of a cross shaped member 84.
The member 84 has outer bearing ends 85,85 which project perpendicular to the outer end 83,83, and ends 85,85 are received in journal openings 86,86 of a bifurcated portion provided by arms having horizontally spaced ends 87,87, the bifurcated portion being a part of a bracket 90 which is provided at the inner end of main frame 55. The pivot means 58 thus forms a universal type joint between brackets 80 on the tractor unit and bracket 90 on the inner end of the main frame 55 of the left hand head 13. The pivot means 58 permits the tractor unit 11 to carry the inner end of sb/
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the head 13, while permitting the outer end of the head to pivot upwardly and downwardly as the ground engaging means 69 trave,ls over terrain which is at a different level than the tractor, this pivoting motion taking place about horizontal axis H~-H provided by bearing ends 85,85 of the member 84 ~Figure 3). The head is also permitted to swing to the transport position shown in Figure 2 because of the vertical axis of pivot V--V
provided by bearing ends 83,83 of the member 84. The pivot means 68 connecting head 14 to the tractor unit is of the same construction as pivot means 58 and requires no further description.
Attached to frames 36,36 of tractor unit 11 are brackets 95,95 which project transversely from the side of the tractor unit and are forward of brackets 80,80. Projecting forwardly from main frame members 55 and 65 of the side heads 13 and 14 are brackets 96,96.
A piston and cylinder type motor 97 is pivotally connected at opposite ends between bracket 95 and 96 at each side of the tractor. When the motors 97,97 are contracted from the extended position shown in Figure 2 to the contracted position shown in Figure 1, the side heads are swung from a travel position to a work position. The engine 40 is preferably equipped with a hydraulic pump (not shown) which may be used for various power assist units, such as the steering of the tractor unit 11, as is customary; and a control valve (not shown) may be provided at the operators position 42, whereby the flow of pressurized fluid of the motors 97,97 by way of conduits (not shown) is controlled so as to swing sb/
-the side heads 13 and 14 between the transport 2nd work positions from within the tractor cab.
A 2air of rigid members or struts 98,98 having pin connecting means at opposite ends thereof may be removably connected between the main frames 55 and 65 of the side heads and the tractor unit 11 rearwardly of brackets 80 so that the motors 97,97 are not required to hold the side heads 13 and 14 in the work position (Figure 1).
The side heads are prevented from swinging rearwardly during operation by struts 98,98, which may be readily removed whenit is desired to allow the side heads to swing to the trailing or transport positions (Figure 2).
Connected between the inner ends of the main drive shafts 62 and 72 of the side heads 13 and 14 and the outer ends 44,44 of the transverse power shaft 43 there are provided, a telescopic drive sections 101 (Figure 2) including a spaced pair of universal joints 102,102, this drive mechanism being of the type normally used between a P.T.O. shaft and an implement equipped with a power driven shaft. The drive shafts 62 and 72 are thus driveable by the transverse power shaft 43 of the tractor unit so that the knives, reels and conveyors are thus driven when the side heads are in the work position and the power shaft 43 .is placed in gear. The drive section 101 and universal joints 102,102 permit the side heads to swing to the transport position without disconnection of the drive.
On the left hand side of the tractor unit 11, the power shaft 43 is provided with.a belt sheave 103 (Fiqure 1). A
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belt sheave 104 is also secured on main drive shaft 22 of central head 12, and a drive belt 105 encircles the sheaves 103 and 104 for transmitting rotary drive to main drive shaft 22 simultaneously with drive transmission to main drive shafts 62 and 72 of the side heads 13 and 14.
As was explained above, the upper flights 77 and 7~3 of the conveyor means in the side heads 13 and 14 are driven in direction of arrows D and E, and the pair of upper flights 25 and 26 of the conveyor means 24 in the central head may operate in opposite directions, as indicated by arrows B and C,whereby two parallel windrows of substantially the same size are formed. If the upper flights 25 and 26 of conveyor means 24 are operated in the same direct, the cut vegetation of the central head 11 and side head 14 are dumped in a single windrow 30, an addition conveyor means 106 may be provided to transfer the cut vegetation being discharged by head 13 from outlet opening 64 to the same windrow 30. The conveyor means 106 may include a frame 107, which is secured below frame members 36,36, and extends transversely relative to the direction of travel of the tractor unit 11. I'he conveyor means 106 further includes a continuous belt, which may be driven by a drive means (not shown) from power shaft 43, the continuous belt having an upper flight 108 travelling in the direction of arrow F. The cut vegetation is thus Carried under the chassis of the tractor unit 1 from the left hand to the right hand side thereof. The type of crop being _ g _ sb/
1~51~31 harvested and its heaviness may determine whether a single windrow or double windrows are formed.
Figure 8 illustrates a conveyor means 106' which includes two conveyor sections 205,206 having upper flights 207,208 both driven in the direction oE arrows M by means (not shown). Conveyor section 207 is mounted at opposite ends beneath frame n~mber 36,36 by mounting members 209,210 with a fixed ground clearance. Conveyor section 208 is pivotally connected to mounting member 210 adjacent the end of conveyor section 207 and has an outer end which rests on an extension 212 of a member 211 carried by head 13 below conveyor means 75. m us as head 13 is adjusted upwardly and downwardly, a smooth transfer of the cut vegetation is assured between conveyor means 75 and conv~yor means 106'. Moreover, when the swather is prepared for transportation and the head 13 is swung to the transporting position, the conveyor æction 208 can be swung upwardly about its pivot axis and held up by an adjustable chain means 214 or similar arrangement.
Referring to Figure 4, the body portion 110 of the head 13 ~hich carries the front edge cutting means 57, i.e. knife 60 and reel 61, and the conveyor means 75, is connected at its rear side to the main frame 55 by way of a pivot connection 111. A height adjusting cylinder means 112 is provided adjacent the outer end of the head 13, and a like cylinder means 112 (not shown) is provided adjacent the outer end. The cylinder means 112 is pivotally connected at opposite ends to the frame 55 and the body portion 110 so that as ~le cylinder means 112 is expanded the front edge cutting means 57 is raised because the body portion is caused to pivot upw ædly about connection 111.
Pressurized hydraulic fluid is supplied to the cylinder means via fluid conduits (not s~own) from the hydraulic system of the tractor unit through a control val~7e located adjacent the operators position 42. Control of ~
pressurized fluid to cylinder means 112 to cause its contraction brings about lowering of the front edge cutting means. Each of heads 12 and 14 may be pc/
.
:
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" ~5~431 similarly equipped with cylinder means (not shown) and may be controlled by separate control valves in the tractor cab so that the cutting height of each of the three heads may be individually controlled. me central head 12, behind which the windrow(s) are formed, may be set lower, for example, than the two side heads 13 and 14.
The two ground engaging means 69 and 79 of the two side heads 13 and 14 may be of slightly different contruction for reasons which will become apparent. m e ground engaging means 69 and 79 each may include dual wheels 115,115 mounted for rotation about a com~on axis on aligned axles 116,116 projecting horizontally from a central member 117. An upwardly extending vertical spindle 118 is fixed to central member 117 and is freely journalled in a bracket 119 which is fixed to a rear side of the main frame member of the head. me central member 117 and spindle may form a caster angle relative to the vertical so that the dual wheels will automatically swing to the direction of travel, i.e. through 90 as illustrated in the two positions shown in Figures 1 and 2.
m e ground engaging means 79 is shown as including a crank arm - 122 fixed to the upper end of spindle 118. A piston and cylinder type motor 123 is pivotally connected at one end to the frame 65. A piston rod 124 of the tor 123 is pivotally connected by connecting means 129 to the crank arm 122.
m e tor 123 is double acting and receives pressurized fluid via conduits 125,125 so as to cause the motor to contract or expand and thus turn the spindle 118 and thereby steer the dual wheels 115,115 of the ground engaging means 79. The connecting means is of a type to permit ready attachment to the crank arm when the head 14 is in the transport position; otherwise, the piston rod 124 is not connected to the crank arm 122, and the motor 123 is simply carried behind main frame 65 when the head 14 is in its work position. The flow of pressurized fluid to the motor 123 through conduits 125,125 is supplied by the hydraulic system of the tractor unit 11, preferably by a control valve which is activated by a foot pedal at the operators position 42.
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" ~lS1~31 When in the transport position, the piston and cylinder type motors 97,97 are allowed to float so that the side heads 13 and 14 can freely trail. When negotiating a tight corner steer of head 14 is effected by activating the foot pedal controlling flow of fluid to the motor 123 so that the caster wheels 115,115 are turned. A tie bar 130 having a pin type connector at opposite ends may be provided to transfer the steer force from head 14 to head 13 (Figure 2).
From the above description of the swather 10, it can be appreciated that very few manipulations are required to alter the swather from a working condition to a transport condition and vice versa. For example, when entering a field after travel, the tie bar 130 is removed and the motor 123 is disconnected from the crank arm 122. The motors 97,97 are then activated to swing the side heads to the work positions, and~the struts 98,98 are placed in the positions shown in Figure 1. The drive systems for all of the heads require no set-up at thls time, and therefore, the height of the front edge cutting means 17, 57 and 67 can be adjusted by activating the cylinder means 112 of each head as the cutting is col~menced.
In an alternative embodiment of the invention, shown in Figure 7, the motors 97,97 and struts 98,98 are replaced by an arrangement which permits the side heads to be swung from the transport position to the work position from within the tractor cab without having to manually remove the struts. The arrangement includes struts 98', each of which is pivotally connected at opposite ends to the side head and the tractor unit but is formed by two rigid sections 200, 201 sb/~\ t~
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connected by an intermediate hinge joint 203 so that each strut can be folded. A piston and cylinder type motor 204, which is provided in place of motor 97 for each head, is pivotally connected at one end to the main frame of the head and at the other end to the section of the strut connected to the main frame. Thus, when the side head is to be swuny to the work position (shown in chain dotted lines) the motor 204 is activated to move the folded strut to a straight line condition wherein the strut is capable of holding the side head in its work position. The movement of the strut from its folded to straight line condition provides the force for swinging the side head from its trailing to its transversely projecting position. The control valve (not shown), through which the fluid is supplied to the motor 204, is located in the cab and this valve has a float position which is utilized when the heads are in the transport position.
The mountings of the three heads on the tractor unit 11 are relatively simple so that ready removal is possible whereby the tractor unit could be equipped with other means, such as spraying booms to thereby permit use of the tractor other than during the swathing season.
The specific embodiments of the invelltion are described above to give examples of the invention, it being readily apparent that various modifications within the spirit of the invention as set forth in the accompanying claims could be made by one skilled in the ar-t.
In harvesting equipment, such as swathers, it has been known to utilize a number of heads so as to cut a wide swath on each pass. A number of these types of swathers have three heads which are transversely aligned and wherein the two outer heads swing upwardly about their inner ends during transport. It has normally been proposed when the heads are transversely aligned to drive the knives and reels from a common drive. Generally, the known types of multi-head swathers have experience difficulties in the drive systems which are of a complex design. When the heads are in a transport position the machine is awkward to handle and is restricted as to relatively wide roadways and high overhead obstructions.
According to the present invention, there is provided a self-propelled swather including a tractor unit having a prime mover, a central head and a~pair of side heads. The central head is mounted in front of the tractor unit and has a front edge cutting means extending between opposite end edges. Cne each of the side heads is disposed Oll either side of the tractor unit, and each side head has a front edge cutting means extending between an inner end adjacent the tractor unit and an outer end, the inner ends of the side heads being behind and substantially aligned one each with opposite end edges of the central head when the s~/ ~
:
- ~51~31 side heads are in a work position. Pivot means connects the side heads to the tractor unit at the inner ends of the side heads and permit swinging rearwardly of each head to a transport position. In the transport position, the front edges of the side heads are substantially parallel to the normal direction of travel of the tractor unit.
In a specific embodiment of the invention, the central head is supported solely by the tractor unit, and each side head is supported at its inner end by the tractor unit and at its outer end by ground engaging means, such as a caster wheel.
Also in a specific embodiment of the invention each head has lndividual cutting height adjusting means, and the cutting means of each head is driven by separate power transmitting means from the tractor unit.
In the accompanying drawings, which show one embodiment as an example;
Figure 1 is a plan view of the swather in a working mode;
Figure 2 is a plan view the same as Figure 1, but with the heads in a transport position;
Figure 3 is an enlarged vie~of a pivot means between a side head and the tractor as seen from the line 3--3 of Figure l;
Figure 4 is a view as seen from line 4--4 of Figure 1 illustrating a height adjustment means;
Figure 5 is a view of a ground engaging means of the head as seen from line 5--5 of Figure 2;
Figure 6 is a side view of the ground engaging sb/
.
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~.~51431 means shown in Figure 5;
Figure 7 is a partial plan view showing an alternative connection between the tractor and side head; and Figure 8 is a rear view of an embodiment of a transfer conveyor mounted below the tractor unit.
The reference number 10 generally denotes the swather of the present invention, the swather 10 including a tractor unit 11, a central cutting head 12, and a pair of side cutting heads 13 and 14. The tractor unit 11 includes a body having a chassis with main frame members 36,36 carried by front drive wheels 37,37 and rear steering wheels 38,38. The drive wheels 37,37 are larger than the rear wheels 38,38 and the rear wheels may include a standard automotive type steer controlled from a operators position 42 in a cab near the front of the tractor unit. The tractor unit has a transversely disposed prime mover, such as a Diesel engine 40, with drive means 41 extending to the front wheels and controlled by a transmission system from the operators position 42. The tractor unit is also provided with power-take-off means in the form of a transversely extending shaft 43, the shaft 43 being driven from the engine 40 and the rotation of which is controllable from the operators position. The ends 44,44 of the shaft extend from opposite sides of the tractor unit. The tractor unit includes other structural features, many of which will be further described below.
l`he central head 12 has a main framel~*~r 15 extending across the-f~il wi*~h of the head at the back thereof, and the frame ~ember 15 is carried at the front of the tractor unit by brackets 16,16. me central head 12 has a front edge cutting means 17 extending full width of the head between opposite end edges 18,18 of the central pc/
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head. The front edge cutting means includes the conventional reciprocating knife 20 and a rotating reel 21 disposed above the knife. The knife 20 and reel 21 are both driven by a main drive shaft 22 which extends the width of the head; a belt drive 23 being shown at the left hand end of the head for driving the reel, and pitman crank mechanism (not shown) being provided for reciprocating the knife.
Rearwardly of the front edge cutting means.17 is a transversely extending conveying means 24 which is also driven by main drive shaft 22, the conveying means 24 for the central head including two endless belts, the upper flights of which are shown at 25 and 26. The drive mechanism (not shown) for the belts is adapted to drive the belts so that the upper flights 25 and 26 both travel in the same direction as indicated by arrows A and B.
Alternatively, the belt having upper flight 25 can be driven so that the upper flight thereof travels in the opposite direction, i.e. the direction indicated by the arrow C. The - central head 12 has a pair of outlets 27~28, one each being located inside of each of ends 18,18. When the conveyor belts are driven so that the upper flights 25 and 26 travel in opposite directions, as indicated by arrows C and B, the vegetation cut b-y the front edge cutting means 17 is divided and exits through both ol~tlets 27 and 28. I~ the belts are driven so that the upper flights 25 and 26 travel in the same directions, as indicated by arrows A and B, all the vegetation cut by the front edge cutting 17 of the central head is discharged via outlet 28 in a single sb/
.
, ,. ' '',, ~ ~
- ~51431 windrow as indicated at 30.
Eacll of the side heads 13 and 14 has a main frame member 55 and 65, respectively; a front edge cutting means 57 and 67, respectively; a reciprocating knife 60 and 70, respectively; a rotating reel 61 and 71, respectively; a main drive shaf* 62 and 72, respectively; and a belt drive 63 and 73, respectively; which correspond substantially to the frame member 15, front edge cutting means 17, reciprocating knife 20, rotating reel 21, main drive shaft 22 and belt drive 23 of the central head 12. Unlike the central head 12, the side heads 13 and 14 are carried only at inner ends 56 and 66, respectively, by the tractor unit 11, this being done through pivot mlans 58 and 68, which will be described in more detail below. The outer ends of the side heads 13 and 14 are carried on ground engaging means 69 and 79 respectively. Each of said heads 13 and 14 have oonveyor means 75 and 76 immediately behind the front edge cutting means 57 and 67 thereof and driven by means (not shown) from the main drive shaft 62 and 72 of the respective side head. Unlike the central head, side head 13 has a single outlet opening 64 at its inner end 56, and the conveyor means 75 and may include a single endless belt which has a top flight 77 adapted to travel in an inwardly direction towards outlet opening 64, as indicated by arrow D.
~le conveyor means 75 and 76 of the side heads may include two endless belts the same as that described in connection with the central head, but adapted to drive in the same direction, i.e., towards the tractor unit. With the use of exceptional long heads the use of the two endless belts may be more satisfactory than one very long belt. m e conveyor means 76 of the right hand head includes a top flight 78 which is driven towards outlet opening 74 at the inner end of the right head, as indicated by arrow E.
When the side heads 13 and 14 are in their work position, as shown in Figure 1, the inner ends 56 and 66 are pc/
S1~31 behind the central head 12 and substantially aligned with the opposite end edges 18,18 of the central head so that the width of the swath taken by the swather 10 is substantially equal to the total lengths of the three heads. For example, if each head is 25 feet in length, the total width of the swather is approximately 75 feet.
If the conveyor means of the central head is operated so that the travel of the upper flights 25 and 26 are opposite, the discharged veqetation is layed in two windrows which are jointed by the discharge of the two side heads. Two parallel wind~ows of substantially the same size are laid at a spacing sli~htly less than the total width of the central head.
The tractor has brackets 80,80 extending from opposite sides thereof and forming a bifurcated portion defining a pair of arms 89,89 terminating in vertically spaced ends 81,81 which provide journal openings 82,82 (Figure 3) in the pivot means 58. The journals receive the outer bearing ends 83,83 of a cross shaped member 84.
The member 84 has outer bearing ends 85,85 which project perpendicular to the outer end 83,83, and ends 85,85 are received in journal openings 86,86 of a bifurcated portion provided by arms having horizontally spaced ends 87,87, the bifurcated portion being a part of a bracket 90 which is provided at the inner end of main frame 55. The pivot means 58 thus forms a universal type joint between brackets 80 on the tractor unit and bracket 90 on the inner end of the main frame 55 of the left hand head 13. The pivot means 58 permits the tractor unit 11 to carry the inner end of sb/
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the head 13, while permitting the outer end of the head to pivot upwardly and downwardly as the ground engaging means 69 trave,ls over terrain which is at a different level than the tractor, this pivoting motion taking place about horizontal axis H~-H provided by bearing ends 85,85 of the member 84 ~Figure 3). The head is also permitted to swing to the transport position shown in Figure 2 because of the vertical axis of pivot V--V
provided by bearing ends 83,83 of the member 84. The pivot means 68 connecting head 14 to the tractor unit is of the same construction as pivot means 58 and requires no further description.
Attached to frames 36,36 of tractor unit 11 are brackets 95,95 which project transversely from the side of the tractor unit and are forward of brackets 80,80. Projecting forwardly from main frame members 55 and 65 of the side heads 13 and 14 are brackets 96,96.
A piston and cylinder type motor 97 is pivotally connected at opposite ends between bracket 95 and 96 at each side of the tractor. When the motors 97,97 are contracted from the extended position shown in Figure 2 to the contracted position shown in Figure 1, the side heads are swung from a travel position to a work position. The engine 40 is preferably equipped with a hydraulic pump (not shown) which may be used for various power assist units, such as the steering of the tractor unit 11, as is customary; and a control valve (not shown) may be provided at the operators position 42, whereby the flow of pressurized fluid of the motors 97,97 by way of conduits (not shown) is controlled so as to swing sb/
-the side heads 13 and 14 between the transport 2nd work positions from within the tractor cab.
A 2air of rigid members or struts 98,98 having pin connecting means at opposite ends thereof may be removably connected between the main frames 55 and 65 of the side heads and the tractor unit 11 rearwardly of brackets 80 so that the motors 97,97 are not required to hold the side heads 13 and 14 in the work position (Figure 1).
The side heads are prevented from swinging rearwardly during operation by struts 98,98, which may be readily removed whenit is desired to allow the side heads to swing to the trailing or transport positions (Figure 2).
Connected between the inner ends of the main drive shafts 62 and 72 of the side heads 13 and 14 and the outer ends 44,44 of the transverse power shaft 43 there are provided, a telescopic drive sections 101 (Figure 2) including a spaced pair of universal joints 102,102, this drive mechanism being of the type normally used between a P.T.O. shaft and an implement equipped with a power driven shaft. The drive shafts 62 and 72 are thus driveable by the transverse power shaft 43 of the tractor unit so that the knives, reels and conveyors are thus driven when the side heads are in the work position and the power shaft 43 .is placed in gear. The drive section 101 and universal joints 102,102 permit the side heads to swing to the transport position without disconnection of the drive.
On the left hand side of the tractor unit 11, the power shaft 43 is provided with.a belt sheave 103 (Fiqure 1). A
sb/
belt sheave 104 is also secured on main drive shaft 22 of central head 12, and a drive belt 105 encircles the sheaves 103 and 104 for transmitting rotary drive to main drive shaft 22 simultaneously with drive transmission to main drive shafts 62 and 72 of the side heads 13 and 14.
As was explained above, the upper flights 77 and 7~3 of the conveyor means in the side heads 13 and 14 are driven in direction of arrows D and E, and the pair of upper flights 25 and 26 of the conveyor means 24 in the central head may operate in opposite directions, as indicated by arrows B and C,whereby two parallel windrows of substantially the same size are formed. If the upper flights 25 and 26 of conveyor means 24 are operated in the same direct, the cut vegetation of the central head 11 and side head 14 are dumped in a single windrow 30, an addition conveyor means 106 may be provided to transfer the cut vegetation being discharged by head 13 from outlet opening 64 to the same windrow 30. The conveyor means 106 may include a frame 107, which is secured below frame members 36,36, and extends transversely relative to the direction of travel of the tractor unit 11. I'he conveyor means 106 further includes a continuous belt, which may be driven by a drive means (not shown) from power shaft 43, the continuous belt having an upper flight 108 travelling in the direction of arrow F. The cut vegetation is thus Carried under the chassis of the tractor unit 1 from the left hand to the right hand side thereof. The type of crop being _ g _ sb/
1~51~31 harvested and its heaviness may determine whether a single windrow or double windrows are formed.
Figure 8 illustrates a conveyor means 106' which includes two conveyor sections 205,206 having upper flights 207,208 both driven in the direction oE arrows M by means (not shown). Conveyor section 207 is mounted at opposite ends beneath frame n~mber 36,36 by mounting members 209,210 with a fixed ground clearance. Conveyor section 208 is pivotally connected to mounting member 210 adjacent the end of conveyor section 207 and has an outer end which rests on an extension 212 of a member 211 carried by head 13 below conveyor means 75. m us as head 13 is adjusted upwardly and downwardly, a smooth transfer of the cut vegetation is assured between conveyor means 75 and conv~yor means 106'. Moreover, when the swather is prepared for transportation and the head 13 is swung to the transporting position, the conveyor æction 208 can be swung upwardly about its pivot axis and held up by an adjustable chain means 214 or similar arrangement.
Referring to Figure 4, the body portion 110 of the head 13 ~hich carries the front edge cutting means 57, i.e. knife 60 and reel 61, and the conveyor means 75, is connected at its rear side to the main frame 55 by way of a pivot connection 111. A height adjusting cylinder means 112 is provided adjacent the outer end of the head 13, and a like cylinder means 112 (not shown) is provided adjacent the outer end. The cylinder means 112 is pivotally connected at opposite ends to the frame 55 and the body portion 110 so that as ~le cylinder means 112 is expanded the front edge cutting means 57 is raised because the body portion is caused to pivot upw ædly about connection 111.
Pressurized hydraulic fluid is supplied to the cylinder means via fluid conduits (not s~own) from the hydraulic system of the tractor unit through a control val~7e located adjacent the operators position 42. Control of ~
pressurized fluid to cylinder means 112 to cause its contraction brings about lowering of the front edge cutting means. Each of heads 12 and 14 may be pc/
.
:
.
" ~5~431 similarly equipped with cylinder means (not shown) and may be controlled by separate control valves in the tractor cab so that the cutting height of each of the three heads may be individually controlled. me central head 12, behind which the windrow(s) are formed, may be set lower, for example, than the two side heads 13 and 14.
The two ground engaging means 69 and 79 of the two side heads 13 and 14 may be of slightly different contruction for reasons which will become apparent. m e ground engaging means 69 and 79 each may include dual wheels 115,115 mounted for rotation about a com~on axis on aligned axles 116,116 projecting horizontally from a central member 117. An upwardly extending vertical spindle 118 is fixed to central member 117 and is freely journalled in a bracket 119 which is fixed to a rear side of the main frame member of the head. me central member 117 and spindle may form a caster angle relative to the vertical so that the dual wheels will automatically swing to the direction of travel, i.e. through 90 as illustrated in the two positions shown in Figures 1 and 2.
m e ground engaging means 79 is shown as including a crank arm - 122 fixed to the upper end of spindle 118. A piston and cylinder type motor 123 is pivotally connected at one end to the frame 65. A piston rod 124 of the tor 123 is pivotally connected by connecting means 129 to the crank arm 122.
m e tor 123 is double acting and receives pressurized fluid via conduits 125,125 so as to cause the motor to contract or expand and thus turn the spindle 118 and thereby steer the dual wheels 115,115 of the ground engaging means 79. The connecting means is of a type to permit ready attachment to the crank arm when the head 14 is in the transport position; otherwise, the piston rod 124 is not connected to the crank arm 122, and the motor 123 is simply carried behind main frame 65 when the head 14 is in its work position. The flow of pressurized fluid to the motor 123 through conduits 125,125 is supplied by the hydraulic system of the tractor unit 11, preferably by a control valve which is activated by a foot pedal at the operators position 42.
pc/
.
" ~lS1~31 When in the transport position, the piston and cylinder type motors 97,97 are allowed to float so that the side heads 13 and 14 can freely trail. When negotiating a tight corner steer of head 14 is effected by activating the foot pedal controlling flow of fluid to the motor 123 so that the caster wheels 115,115 are turned. A tie bar 130 having a pin type connector at opposite ends may be provided to transfer the steer force from head 14 to head 13 (Figure 2).
From the above description of the swather 10, it can be appreciated that very few manipulations are required to alter the swather from a working condition to a transport condition and vice versa. For example, when entering a field after travel, the tie bar 130 is removed and the motor 123 is disconnected from the crank arm 122. The motors 97,97 are then activated to swing the side heads to the work positions, and~the struts 98,98 are placed in the positions shown in Figure 1. The drive systems for all of the heads require no set-up at thls time, and therefore, the height of the front edge cutting means 17, 57 and 67 can be adjusted by activating the cylinder means 112 of each head as the cutting is col~menced.
In an alternative embodiment of the invention, shown in Figure 7, the motors 97,97 and struts 98,98 are replaced by an arrangement which permits the side heads to be swung from the transport position to the work position from within the tractor cab without having to manually remove the struts. The arrangement includes struts 98', each of which is pivotally connected at opposite ends to the side head and the tractor unit but is formed by two rigid sections 200, 201 sb/~\ t~
': ` . ~ ': `.
.: . ' `
connected by an intermediate hinge joint 203 so that each strut can be folded. A piston and cylinder type motor 204, which is provided in place of motor 97 for each head, is pivotally connected at one end to the main frame of the head and at the other end to the section of the strut connected to the main frame. Thus, when the side head is to be swuny to the work position (shown in chain dotted lines) the motor 204 is activated to move the folded strut to a straight line condition wherein the strut is capable of holding the side head in its work position. The movement of the strut from its folded to straight line condition provides the force for swinging the side head from its trailing to its transversely projecting position. The control valve (not shown), through which the fluid is supplied to the motor 204, is located in the cab and this valve has a float position which is utilized when the heads are in the transport position.
The mountings of the three heads on the tractor unit 11 are relatively simple so that ready removal is possible whereby the tractor unit could be equipped with other means, such as spraying booms to thereby permit use of the tractor other than during the swathing season.
The specific embodiments of the invelltion are described above to give examples of the invention, it being readily apparent that various modifications within the spirit of the invention as set forth in the accompanying claims could be made by one skilled in the ar-t.
Claims (37)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS
1. A self-propelled swather comprising a tractor unit including a prime mover;
a central head mounted in front of said tractor unit and having front edge cutting means extending between opposite end edges;
a pair of side heads, one each being disposed on either side of said tractor unit and each having front edge cutting means extending between an inner end adjacent said tractor unit and an outer end, said inner ends of said side head being behind and substantially aligned one each with said opposite end edges of said central head in a work position; and pivot means connecting said side heads to said tractor unit at the inner ends of said side heads and permitting swinging of each head to a trailing transport position, the front edges of said side heads in the transport position being substantially parallel to the normal direction of travel of said tractor unit.
a central head mounted in front of said tractor unit and having front edge cutting means extending between opposite end edges;
a pair of side heads, one each being disposed on either side of said tractor unit and each having front edge cutting means extending between an inner end adjacent said tractor unit and an outer end, said inner ends of said side head being behind and substantially aligned one each with said opposite end edges of said central head in a work position; and pivot means connecting said side heads to said tractor unit at the inner ends of said side heads and permitting swinging of each head to a trailing transport position, the front edges of said side heads in the transport position being substantially parallel to the normal direction of travel of said tractor unit.
2. A self-propelled swather as defined in claim 1, wherein said central head is supported solely by said tractor unit, and each side head is supported at the outer end thereof by ground engaging means.
3. A self-propelled swather as defined in claim 2, wherein each side head is supported at the inner end thereof solely by said tractor unit.
4. A self-propelled swather as defined in claim 2 or 3, wherein said ground engaging means includes a caster wheel.
5. A self-propelled swather as defined in claim 1, 2 or 3, wherein each head has individual cutting height adjustment means.
6. A self-propelled swather as defined in claim 1, 2 or 3, wherein the cutting means of each head is driven by individual power transmitting means from said tractor unit.
7. A self-propelled swather as defined in claim 2, wherein said pivot means connecting each side head to said tractor unit comprises means defining a vertical axis of pivot for permitting said side head to pivot between said work and transport positions and a horizon-tal axis of pivot perpendicular to said vertical axis to permit movement in a vertical plane and thereby ac-comdate said ground engaging means running over uneven ground.
8. A self-propelled swather as defined in claim 7, wherein each side head includes a main frame member connected at an inner end to said pivot means and carried adjacent an outer end thereof by said ground engaging means.
9. A self-propelled swather as defined in claim 8, wherein each side head includes a body portion carried by said frame member and projecting forwardly therefrom to said front edge cutting means.
10. A self-propelled swather as defined in claim 9 and including height adjusting means connected between said frame member and said body portion for raising and lowering said front cutting edge means thereof.
11. A self-propelled swather as defined in claim 10 wherein said height adjusting means includes hydraulic piston and cylinder means, and further including hydraulic lines connected between said piston and cylinder means of each side head and a separate manual control valve means carried by said tractor unit for each side head.
12. A self-propelled swather as defined in claim 9, including conveyor means carried by said body portion rearwardly of said front edge cutting means and extending from said outer end to said inner end of each side head.
13. A self-propelled swather as defined in claim 10, wherein said conveyor means includes a continuous belt having an upper flight for carrying cut vegetation for delivery at said inner end of said side head.
14. A self-propelled swather as defined in claim 1, wherein the side heads includes conveyor means rearward of said front edge cutting means and extending from the outer end of each side head to the inner end thereof for delivery of cut vegetation from the side heads to locations adjacent opposite sides of said tractor unit.
15. A self-propelled swather as defined in claim 14, and wherein said central head has conveyor means rearwardly of said front edge cutting means and extending between said end edges for delivery of cut vegetation to a location adjacent at least one end edge.
16. A self-propelled swather as defined in claim 15, and further including conveyor means extending from adjacent the delivery of one side head to the delivery of the other side head whereby the total delivery of both side heads is at the side of the tractor unit ad-jacent said other side head.
17. A self-propelled swather as defined in claim 16, wherein the conveyor means of said central head de-livers all of the front edge cutting means to a location adjacent the end edge thereof in front of the inner end of said other side head whereby a single windrow is formed.
18. A self-propelled swather as defined in claim 15, wherein said conveyor means of said central head includes a pair of conveyors extending from a midpoint of said central head to the opposite end edges thereof, said central head having delivery outlets adjacent the opposite end edges.
19. A self-propelled swather as defined in claim 18, wherein said central head has conveyor drive means for selectively driving said pair of conveyors for de-livery totally in one direction towards one of said de-livery outlets or alternatively for separating the delivery in opposite directions whereby the cut vegetation is divided for delivery simultaneously to both delivery outlets.
20. A self-propelled swather as defined in claim 19, wherein said pair of conveyors includes a pair of continous belts, each belt having an upper flight ex-tending from a midpoint of the central head to one of the opposite end edges, said top flights in one mode of operation travelling in the same direction and in other mode travel-ling in opposite directions from said midpoint toward op-posite end edges.
21. A self propelled swather as defined in claim 16, wherein said conveyor for delivering vegetation from said one side head to adjacent said other head includes a continuous belt carried in a frame extending transversely below said tractor unit and a continuous belt carried by said frame and having an upper flight driven in a direction from adjacent the inner end of said one side head to a location adjacent the inner end of said other side head.
22. A self-propelled swather as defined in claim 8, wherein said central head includes a main frame member carried on the front end of said tractor unit and a body portion carried by said frame member thereof and projecting forwardly to said front cutting means.
23. A self-propelled swather as defined in claim 22 and including height adjusting means connected between said frame and said body portion for raising and lowering said front cutting edge means thereof.
24. A self-propelled swather as defined in claim 22, wherein the body portion of each head supports a transversely extending, rotating drive shaft, said drive shaft including drive means connecting said drive shaft to operating components of each respective head.
25. A self-propelled swather as defined in claim 24, wherein said tractor unit has transversely extending, rotating power shaft, and further comprising drive means drivingly connecting said power shaft to said prime mover, a pair of drive shafts provided with universal connections each conecting one end of said power shaft to said drive shaft of each side head.
26. A self-propelled swather as defined in claim 25, and further including a belt sheave adjacent one end of said power shaft and an aligned belt sheave on the drive shaft of the central head, and belt means encircling said sheaves for transferring drive from said power shaft to said drive shaft of said central head.
27. A self-propelled swather as defined in claim 8, and including a separate hydraulic piston and cylinder means connected between said tractor unit and the main frame of each side head for swinging said side heads be-tween said travel and work positions.
28. A self-propelled swather as defined in claim 27 and including hydraulic lines connecting said piston and cylinder means with manual control valve means within said tractor unit.
29. A self-propelled swather as defined in claim 27 or 28, and further including rigid strut means connectable between each side head and said tractor unit in said work position.
30. A self propelled swather as defined in claim 27 or 28, and including a rigid connector detatachably connected between said side heads in said transport position.
31. A self-propelled swather as defined in claim 7, wherein said ground engaging means includes a horizontal axle portion mounting at least one ground engaging wheel, a substantially vertical shaft fixed to said axle portion and providing a turning axis for said wheel, a crank arm fixed to said shaft, and power means connectable to said crank arm for steering said wheel.
32. A self-propelled swather as defined in claim 31, wherein said power means includes a hydraulic motor connected between said main frame of at least one of said side heads, hydraulic leads extending from said tractor unit to said hydraulic motor, and manual control means on said tractor unit for controlling the flow of pressurized hydraulic fluid to said hydraulic motor.
33. A self-propelled swather as defined in claim 32, wherein said manual control means includes a foot pedal.
34. A self-propelled swather as defined in claim 32 wherein said hydraulic motor includes a piston and cylinder motor, one end of said motor being readily detatachable from said crank arm when said side heads are in said work position.
35. A self-propelled swather as defined in claim 31, 33 or 34, wherein said motor means is connected between the main frame and the crank arm of one side head, and further including a tie rod having a pin connection at opposite ends thereof, means carried on main frame of each side head for receiving the pin connections, whereby said tie rod jams said heads in the transport position and transfer a steering force developed in said one head to the other head.
36. A self-propelled swather as defined in claim 8, and further including a pair of strut means, on each being pivotally connected at a forward end to the main frame of one of the side heads and at a rear end thereof to said tractor unit, each strut means including two rigid sections joined intermediate the ends of said strut means by a hinge joint, and means for holding said strut in a substantially straight line configuration whereby the side head associated therewith is maintained in said work position.
37. A self-propelled swather as defined in claim 36 wherein said strut means folds at said hinge joint as said side head swings to said transport position, and including a piston and cylinder type motor pivotally connected at one end to the main frame of said side head and at the other end to the rigid section of said strut means connected to said main frame, whereby upon contraction and expansion of said motor said strut means is moved between the transport and work positions.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000401975A CA1151431A (en) | 1982-04-29 | 1982-04-29 | Swather |
| CA000445214A CA1183355B (en) | 1982-04-29 | 1984-01-12 | Swather |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000401975A CA1151431A (en) | 1982-04-29 | 1982-04-29 | Swather |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1151431A true CA1151431A (en) | 1983-08-09 |
Family
ID=4122683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000401975A Expired CA1151431A (en) | 1982-04-29 | 1982-04-29 | Swather |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1151431A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4768334A (en) * | 1987-06-15 | 1988-09-06 | Honey Bee Manufacturing Ltd. | Tractor mounted swather |
| US4903470A (en) * | 1987-09-14 | 1990-02-27 | Claas Ohg | Self-propelling harvester thresher with two-part cutting mechanism |
| US5031394A (en) * | 1989-07-10 | 1991-07-16 | Honey Bee Manufacturing Ltd. | Swather attachment for bi-directional tractor |
| US5911625A (en) * | 1996-09-05 | 1999-06-15 | Same Deutz-Fahr S.P.A. | Self-propelled agricultural harvester |
| US9999178B2 (en) | 2015-06-12 | 2018-06-19 | Oxbo International Corporation | Cam for a windrow merger and pickup head having a variable radius |
-
1982
- 1982-04-29 CA CA000401975A patent/CA1151431A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4768334A (en) * | 1987-06-15 | 1988-09-06 | Honey Bee Manufacturing Ltd. | Tractor mounted swather |
| US4903470A (en) * | 1987-09-14 | 1990-02-27 | Claas Ohg | Self-propelling harvester thresher with two-part cutting mechanism |
| US5031394A (en) * | 1989-07-10 | 1991-07-16 | Honey Bee Manufacturing Ltd. | Swather attachment for bi-directional tractor |
| US5911625A (en) * | 1996-09-05 | 1999-06-15 | Same Deutz-Fahr S.P.A. | Self-propelled agricultural harvester |
| US9999178B2 (en) | 2015-06-12 | 2018-06-19 | Oxbo International Corporation | Cam for a windrow merger and pickup head having a variable radius |
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| Date | Code | Title | Description |
|---|---|---|---|
| MZSU | Surrender |