CA1191032A - Unloading system - Google Patents
Unloading systemInfo
- Publication number
- CA1191032A CA1191032A CA000408663A CA408663A CA1191032A CA 1191032 A CA1191032 A CA 1191032A CA 000408663 A CA000408663 A CA 000408663A CA 408663 A CA408663 A CA 408663A CA 1191032 A CA1191032 A CA 1191032A
- Authority
- CA
- Canada
- Prior art keywords
- grain
- combine
- axis
- unloading system
- exit
- 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
- 241001272996 Polyphylla fullo Species 0.000 description 4
- 239000010902 straw Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 241000251169 Alopias vulpinus Species 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010908 plant waste Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D41/00—Combines, i.e. harvesters or mowers combined with threshing devices
- A01D41/12—Details of combines
- A01D41/1208—Tanks for grain or chaff
- A01D41/1217—Unloading mechanisms
Abstract
ABSTRACT
An unloading system for a combine harvester. An unloading chute is located adjacent the grain tank and has an exit portion which may be swung to either side of the combine harvester when unloading grain from the grain tank.
An unloading system for a combine harvester. An unloading chute is located adjacent the grain tank and has an exit portion which may be swung to either side of the combine harvester when unloading grain from the grain tank.
Description
INTRODUCTION
This application is a division of Canadian application serial number 333,765 filed August 13, 1979 and relates ~o an improved unloading system for a combine harvester.
_CKGROUND OF THE ~NVENTION
In conventional combines, crop is threshed and separated by the use of a threshing cylinder~ a beater, straw walkers and a cleaner. Crop typically passes from a gathering mechanism through a table auger and a feeder elevator to the entrance portion of the threshing cylinder which is mounted transversely to the longitudinal frame axis of the combine. The threshing cylinder comprises a rotor rotatable within a concave and has metal rasp bars attached thereto to thresh the crop as it passes between the rasp bars and the concave of the threshing cylinder. A beater is positioned rearwardly of the threshing cylinder and its axis is substantially parallel to the axis of the threshing assembly. It further removes many of the free kernels that have not yet been separated from the crop in the threshing cylinder and also directs the crop to the straw walkers. The straw walkers convey the crop residue to the rearward and exit portions of the combine while removing free kernels and grain heads which have not been previously separa~ed from the crop. A cleaner is located below the straw walkers and comprises a chaffer located in a higher position and a sieve located beneath the chaffer. The chaffer allows grain to drop therethrough and is adapted to remove the chaff because of its lighter weight and the effect of air flow. The Ghaff~r also provides for returning grain heads to the threshing cylinder for rethreshing. The sieve allows separated free kernels to pass therethrough and be collected by a clean grain auger which conveys the grain to an elevator which, in turn, transports the grain to a grain storage tank.
To remove the grain from the grain tank, a grain auger is used which is located within an unloading chute located on one side of the combine. The unloading chute allows grain to be moved from the grain tank to an unloading or receiving vehicle positioned on the side of the combine where the exit portion of the unloading chute is located.
There are improvements possible in the conventional unloading system just described. Since the unloading chute is located on one side of the combine, there may be no or limited rotational adjustment for the unloading chute available to the operator. At any rate, the combine must be unloaded on one side only. In normal crop combining applications, the grain 3~
receiving vehicle necessarily drives through the swath causing undesirable crop damage. Similarly, the unloading flexibility of the operator may be limited by creating unnecessary vehicle movement when two trucks are deployed.
SUMM~RY OF THE INVENTION
According to the invention, there is disclosed an unloading system for a combine harvester, said system comprising an unloading chute having an entrance means and an exit means, said entrance means being located adjacent a grain tank in said combine, said exit means being located outside said grain tank, said exit means being pivotable about an axis to both sides of the longitudinal axis of said combine.
,*, ~v~
:~9~3~
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
_ The invention will now be described, by way of example only, with reference to accompanying drawings in which:
Figure 1 is a side view of a rotary combine harvester;
Figure 2 is a rear view of the combine of Figure l;
Figure 3 is a cutaway plan view of the combine of Figure l;
and Figure 4 is a plan view of the combine of Figure 1.
DESCRIPTION OF SPECIFIC ME~ODI MENT
Referring now to Figure 1, a rotary combine harvester is shown generally at 1. It comprises a threshing unit shown generally at 15 and a pair of separator units shown generally at 27,28.
A crop pick up 11 is located forwardly of the combine. A
table auger 12 located in the table 13 and a feeder elevator 14, in turn, feed crop to the entrance area of the combine adjacent the threshing unit 15. The threshing unit 15 is positioned with its longitudinal axis transverse to the longitudinal axis of the combine 1 and comprises a xotor 16 and a cylindrical periphery 17 surrounding the rotorO The rotor 16 has flexible blades 18 mounted thereon, which blades 18 are connected by fasteners (not shown~ to the rotor 16. The cylindrical periphery 17 comprises a threshing cap 19 on the upper half of the cylinder periphery 17 and a concave 20 of conventional design on the lower half of the periphery 17.
~ elical guide vanes 21 are mounted within the threshing unit 15 on the upper portion of the cylinder periphery 17 (Figure 3~. The guide vanes are divided into right and left~hand portions 22,23 respectively, each vane of which begins at the rearward portion 24 of the threshing unit 15 inwardly of the entrance area and extends to the left and right respective end portions of the threshing unit 15.
First and second separator units 27,28, respectively, are located with their longitudinal axes transverse ';o the longitudinal axis of the threshing unit 15. The separator units 27,28 are substantially identical and, accordingly, only one of the separating units will be described. A separating rotor 29 (Figure 2) is mounted for rotation within the periphery 30 of the separator unit 27 and metal plates or blades 31 are mounted on the separating rotor 29. The periphery 30 of the separator unit 27 is formed of a solid cylindrical plate 32 over the upper half portion of the cylinder and a perforated grate 33 over the lower portion.
Helical guide vanes 34 (Figure 3) are mounted on the upper portion of the periphery 30 and extend from the entrance area 35 of the separating unit to the exit area 36.
The entrance area 35 of the separator unit 27 has an open area below its longitudinal axis and a plate 60 (Figure 1) mounted above the axis. A further opening (not shown) is provided in the plate 60. This opening communicates with plenum 61 which extends from the entrance area 35 of the separating assembly to the entrance area 62 of the threshing unit 15. The plenum 61 is open at the entrance area 62 in the vicinity of elevator 14 and, at its rearward portion, the plenum 61 communicates directly with the opening in plate 60.
An arrangement for controlling the si~e of the opening in plate 60 such as a mechanically or hydraulically operated sliding shutter valve may be provided.
Augers 44,45, are mounted below separator unit 27. The cleaning section generally denoted 59 includes chaffer 38 which is located bel~w the rearward portion of grain pan 37. Chaffer 38 is perforated with relatively large openings. A sieve 39 with relatively smaller openings is mounted below the chaffer 3~.
A forced air supply 40 is mounted below grain pan 37 to disperse one stream of air over the grain pan 37 and another stream beneath the chaffer 38 and sieve 39. A centrifugal fan is provided to rotate within the housing of the forced air supply 40 and two openings are provided to allow the necessary air to escape. The first opening 51 allows the air to exit below chaffer 38 and sieve 39. The second opening 50 allows air to exit over the grain pan 37.
Clean grain auger 41 is located in the lower portion of the cleaning section. Return auger 43 is also located in the lower portion of the cleaning section 59 and rearwardly of clean grain auger 41.
The grain tank generally denoted 42 is mounted in the upper ~L~L9~ 32 portion of the combine 1 and extends over and between the separator units 27,28 and the threshing unit 15 as more clearly seen in Figure 2. A discharge or unloading chute generally denoted 46 has a first section 52 which extends in the bottom of the grain tank 42 rearwardly to the junction of the first section 52 and a second section 53. The second section 53 extends upwardly and forwardly and terminates at the junction of second section 53 and third section 54. Third section 54 extends forwardly and terminates in a grain exit means 55.
Within each of the three sections, respectively, are grain handling augers 47,48,49 which convey the grain from the grain tank 42 to the grain exit means 55. Suitable gear drives are provided to rotate the augers under power and to allow for rotation of the third section 54 of the discharge chute about the axis 56 (Figure 4). Third section 54 is rotatable through an angle of approximately 270 as seen in Figure 4. In the area generally denoted 57, a screen 58 is provided about the top of the grain tank 42 to allow visual inspection by the operator of the quantity of grain in the grain tank 42.
OPE~ATION
In operation, swathed crop is received by crop pickup 11 and enters table auger 12 where it is conveyed from both sides g towards the central portion and into feeder elevator 14.
Feeder elevator 14 conveys the crop, in turn, to the central entrance area 62 of threshing unit 15 along a plane substantially parallel to the longitudinal axis of the rotor 16 of the threshing unit 15 and such that the crop smoothly enters the threshing unit 15 below its axis 63.
As the crop enters the threshing unit 15, the crop is subject to the initial threshing action of the flexible blades 18 over approximately 100 before it is divided by the guide vanes 22,23 and conveyed to each side of the threshing unit 15. As the crop moves to the sides of threshing unit 15, it continues to be subjected to the flailing action of the flexible blades 18. A substantial portion of grain is removed from the crop in the threshing unit 15 and these free grain kernels pass through the concave 20 together with grain heads and some chaff onto the oscillating grain pan 37.
The threshed crop then passes from the exit areas of the threshing unit 15 axially into the separators 27,28 below the centre positions. Since the action of both separators is substantially identical, only one will be described. The crop axially enters the entrance area 35 of separator 27 (Figure 3) and is conveyed in a layer along the periphery 30 (Figure 2) by the combined action of the helical guide vanes 34 and the rotor 3;~
31. Grain remaining in the crop and, as well, grain heads and some chaff will pass through the grate 33 and fall downwardly into the augers 44,45. ~ugers 44,45 convey the grain, grain heads and any chaff which still remains to the forward portion beneath the separator where it drops towards grain pan 37.
Remaining material will exit from the separator 27 and be deposited on the ground.
As the grain, grain heads and chaff fall downwardly from, respectively, the concave 20 of the thresher and the augers 44,45 of the separating units, they come under the influence of the cleaner generally denoted 59. Air exits at opening 50 to pass over the grain pan 37 and from opening 51 to pass through sieve 39 and chaffer 38, respectively. The action of the air from the forced air supply 40 blows the lighter chaff out the exit of the combine 1 while allowing the grain and srain heads to pass to the clean grain auger 41 and return auger 43, respectively, through chaffer 38 and sieve 39. An elevator (not shown) conveys the grain from the exit of clean grain auger 41 to the grain tank 42. Grain heads which pass to return auger 43 are conveyed to a rethresher (not shown) after which they are again blown into separator unit 27.
The separators 27,28 also provide a suction for the plenum 61. The suction exists at the entrance area 62 of the ~ ~9~V32 threshing unit and acts to reduce the chaff and other airborne debris by removing it from the atmosphere immediately forward of the threshing unit.
When the operator desires to unload the grain tank 42, he activates the augers 47,48,49 and directs the grain exit means 55 by hydraulic means or otherwise, to either side of the combine, as the case may be. Grain will then pass from the grain tank 42 to a truck or other transportation device which receives the unloaded grain.
Accordingly, there has been described a rotary combine which is illustrative of one embodiment of the invention. The description should not be construed as limiting the invention as many changes may be made without departing from the scope of the accompanying claims.
This application is a division of Canadian application serial number 333,765 filed August 13, 1979 and relates ~o an improved unloading system for a combine harvester.
_CKGROUND OF THE ~NVENTION
In conventional combines, crop is threshed and separated by the use of a threshing cylinder~ a beater, straw walkers and a cleaner. Crop typically passes from a gathering mechanism through a table auger and a feeder elevator to the entrance portion of the threshing cylinder which is mounted transversely to the longitudinal frame axis of the combine. The threshing cylinder comprises a rotor rotatable within a concave and has metal rasp bars attached thereto to thresh the crop as it passes between the rasp bars and the concave of the threshing cylinder. A beater is positioned rearwardly of the threshing cylinder and its axis is substantially parallel to the axis of the threshing assembly. It further removes many of the free kernels that have not yet been separated from the crop in the threshing cylinder and also directs the crop to the straw walkers. The straw walkers convey the crop residue to the rearward and exit portions of the combine while removing free kernels and grain heads which have not been previously separa~ed from the crop. A cleaner is located below the straw walkers and comprises a chaffer located in a higher position and a sieve located beneath the chaffer. The chaffer allows grain to drop therethrough and is adapted to remove the chaff because of its lighter weight and the effect of air flow. The Ghaff~r also provides for returning grain heads to the threshing cylinder for rethreshing. The sieve allows separated free kernels to pass therethrough and be collected by a clean grain auger which conveys the grain to an elevator which, in turn, transports the grain to a grain storage tank.
To remove the grain from the grain tank, a grain auger is used which is located within an unloading chute located on one side of the combine. The unloading chute allows grain to be moved from the grain tank to an unloading or receiving vehicle positioned on the side of the combine where the exit portion of the unloading chute is located.
There are improvements possible in the conventional unloading system just described. Since the unloading chute is located on one side of the combine, there may be no or limited rotational adjustment for the unloading chute available to the operator. At any rate, the combine must be unloaded on one side only. In normal crop combining applications, the grain 3~
receiving vehicle necessarily drives through the swath causing undesirable crop damage. Similarly, the unloading flexibility of the operator may be limited by creating unnecessary vehicle movement when two trucks are deployed.
SUMM~RY OF THE INVENTION
According to the invention, there is disclosed an unloading system for a combine harvester, said system comprising an unloading chute having an entrance means and an exit means, said entrance means being located adjacent a grain tank in said combine, said exit means being located outside said grain tank, said exit means being pivotable about an axis to both sides of the longitudinal axis of said combine.
,*, ~v~
:~9~3~
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
_ The invention will now be described, by way of example only, with reference to accompanying drawings in which:
Figure 1 is a side view of a rotary combine harvester;
Figure 2 is a rear view of the combine of Figure l;
Figure 3 is a cutaway plan view of the combine of Figure l;
and Figure 4 is a plan view of the combine of Figure 1.
DESCRIPTION OF SPECIFIC ME~ODI MENT
Referring now to Figure 1, a rotary combine harvester is shown generally at 1. It comprises a threshing unit shown generally at 15 and a pair of separator units shown generally at 27,28.
A crop pick up 11 is located forwardly of the combine. A
table auger 12 located in the table 13 and a feeder elevator 14, in turn, feed crop to the entrance area of the combine adjacent the threshing unit 15. The threshing unit 15 is positioned with its longitudinal axis transverse to the longitudinal axis of the combine 1 and comprises a xotor 16 and a cylindrical periphery 17 surrounding the rotorO The rotor 16 has flexible blades 18 mounted thereon, which blades 18 are connected by fasteners (not shown~ to the rotor 16. The cylindrical periphery 17 comprises a threshing cap 19 on the upper half of the cylinder periphery 17 and a concave 20 of conventional design on the lower half of the periphery 17.
~ elical guide vanes 21 are mounted within the threshing unit 15 on the upper portion of the cylinder periphery 17 (Figure 3~. The guide vanes are divided into right and left~hand portions 22,23 respectively, each vane of which begins at the rearward portion 24 of the threshing unit 15 inwardly of the entrance area and extends to the left and right respective end portions of the threshing unit 15.
First and second separator units 27,28, respectively, are located with their longitudinal axes transverse ';o the longitudinal axis of the threshing unit 15. The separator units 27,28 are substantially identical and, accordingly, only one of the separating units will be described. A separating rotor 29 (Figure 2) is mounted for rotation within the periphery 30 of the separator unit 27 and metal plates or blades 31 are mounted on the separating rotor 29. The periphery 30 of the separator unit 27 is formed of a solid cylindrical plate 32 over the upper half portion of the cylinder and a perforated grate 33 over the lower portion.
Helical guide vanes 34 (Figure 3) are mounted on the upper portion of the periphery 30 and extend from the entrance area 35 of the separating unit to the exit area 36.
The entrance area 35 of the separator unit 27 has an open area below its longitudinal axis and a plate 60 (Figure 1) mounted above the axis. A further opening (not shown) is provided in the plate 60. This opening communicates with plenum 61 which extends from the entrance area 35 of the separating assembly to the entrance area 62 of the threshing unit 15. The plenum 61 is open at the entrance area 62 in the vicinity of elevator 14 and, at its rearward portion, the plenum 61 communicates directly with the opening in plate 60.
An arrangement for controlling the si~e of the opening in plate 60 such as a mechanically or hydraulically operated sliding shutter valve may be provided.
Augers 44,45, are mounted below separator unit 27. The cleaning section generally denoted 59 includes chaffer 38 which is located bel~w the rearward portion of grain pan 37. Chaffer 38 is perforated with relatively large openings. A sieve 39 with relatively smaller openings is mounted below the chaffer 3~.
A forced air supply 40 is mounted below grain pan 37 to disperse one stream of air over the grain pan 37 and another stream beneath the chaffer 38 and sieve 39. A centrifugal fan is provided to rotate within the housing of the forced air supply 40 and two openings are provided to allow the necessary air to escape. The first opening 51 allows the air to exit below chaffer 38 and sieve 39. The second opening 50 allows air to exit over the grain pan 37.
Clean grain auger 41 is located in the lower portion of the cleaning section. Return auger 43 is also located in the lower portion of the cleaning section 59 and rearwardly of clean grain auger 41.
The grain tank generally denoted 42 is mounted in the upper ~L~L9~ 32 portion of the combine 1 and extends over and between the separator units 27,28 and the threshing unit 15 as more clearly seen in Figure 2. A discharge or unloading chute generally denoted 46 has a first section 52 which extends in the bottom of the grain tank 42 rearwardly to the junction of the first section 52 and a second section 53. The second section 53 extends upwardly and forwardly and terminates at the junction of second section 53 and third section 54. Third section 54 extends forwardly and terminates in a grain exit means 55.
Within each of the three sections, respectively, are grain handling augers 47,48,49 which convey the grain from the grain tank 42 to the grain exit means 55. Suitable gear drives are provided to rotate the augers under power and to allow for rotation of the third section 54 of the discharge chute about the axis 56 (Figure 4). Third section 54 is rotatable through an angle of approximately 270 as seen in Figure 4. In the area generally denoted 57, a screen 58 is provided about the top of the grain tank 42 to allow visual inspection by the operator of the quantity of grain in the grain tank 42.
OPE~ATION
In operation, swathed crop is received by crop pickup 11 and enters table auger 12 where it is conveyed from both sides g towards the central portion and into feeder elevator 14.
Feeder elevator 14 conveys the crop, in turn, to the central entrance area 62 of threshing unit 15 along a plane substantially parallel to the longitudinal axis of the rotor 16 of the threshing unit 15 and such that the crop smoothly enters the threshing unit 15 below its axis 63.
As the crop enters the threshing unit 15, the crop is subject to the initial threshing action of the flexible blades 18 over approximately 100 before it is divided by the guide vanes 22,23 and conveyed to each side of the threshing unit 15. As the crop moves to the sides of threshing unit 15, it continues to be subjected to the flailing action of the flexible blades 18. A substantial portion of grain is removed from the crop in the threshing unit 15 and these free grain kernels pass through the concave 20 together with grain heads and some chaff onto the oscillating grain pan 37.
The threshed crop then passes from the exit areas of the threshing unit 15 axially into the separators 27,28 below the centre positions. Since the action of both separators is substantially identical, only one will be described. The crop axially enters the entrance area 35 of separator 27 (Figure 3) and is conveyed in a layer along the periphery 30 (Figure 2) by the combined action of the helical guide vanes 34 and the rotor 3;~
31. Grain remaining in the crop and, as well, grain heads and some chaff will pass through the grate 33 and fall downwardly into the augers 44,45. ~ugers 44,45 convey the grain, grain heads and any chaff which still remains to the forward portion beneath the separator where it drops towards grain pan 37.
Remaining material will exit from the separator 27 and be deposited on the ground.
As the grain, grain heads and chaff fall downwardly from, respectively, the concave 20 of the thresher and the augers 44,45 of the separating units, they come under the influence of the cleaner generally denoted 59. Air exits at opening 50 to pass over the grain pan 37 and from opening 51 to pass through sieve 39 and chaffer 38, respectively. The action of the air from the forced air supply 40 blows the lighter chaff out the exit of the combine 1 while allowing the grain and srain heads to pass to the clean grain auger 41 and return auger 43, respectively, through chaffer 38 and sieve 39. An elevator (not shown) conveys the grain from the exit of clean grain auger 41 to the grain tank 42. Grain heads which pass to return auger 43 are conveyed to a rethresher (not shown) after which they are again blown into separator unit 27.
The separators 27,28 also provide a suction for the plenum 61. The suction exists at the entrance area 62 of the ~ ~9~V32 threshing unit and acts to reduce the chaff and other airborne debris by removing it from the atmosphere immediately forward of the threshing unit.
When the operator desires to unload the grain tank 42, he activates the augers 47,48,49 and directs the grain exit means 55 by hydraulic means or otherwise, to either side of the combine, as the case may be. Grain will then pass from the grain tank 42 to a truck or other transportation device which receives the unloaded grain.
Accordingly, there has been described a rotary combine which is illustrative of one embodiment of the invention. The description should not be construed as limiting the invention as many changes may be made without departing from the scope of the accompanying claims.
Claims (7)
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An unloading system for a combine harvester, said system comprising an unloading chute having an entrance means and an exit means, said entrance means being located adjacent a grain tank in said combine, said exit means being located outside said grain tank, said exit means being pivotable about an axis to both sides of the longitudinal axis of said combine.
2. An unloading system as in claim 1 wherein said axis is a substantially vertical axis located in the rearwards portion of said combine.
3. An unloading system as in claim 2 wherein said exit means comprises a substantially cylindrical tube extending from said axis, said tube being pivotable about said axis to both sides of said longitudinal axis of said combine.
4. An unloading system as in claim 3 comprising at least one auger between said entrance means and said exit means adapted to convey grain from said entrance means to said exit means.
5. An unloading system as in claim 4 and further comprising a first section extending from said entrance means rearwardly to a first junction, a second section extending from said first junction to a second junction, a first auger in said first section, a second auger in said second section, said cylindrical tube extending from said axis in said second junction and a third auger in said cylindrical tube, said augers acting to convey grain from said entrance means to said exit means.
6. An unloading system as in claim 5 wherein said cylindrical tube is hydraulically movable.
7. An unloading system for a combine harvester, said unloading system having an entrance means and an exit means, auger means to convey grain from a grain storage device in said harvester to said exit means, and a cylindrical tube pivotable about a substantially vertical axis to both sides of the longitudinal axis of said combine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000408663A CA1191032A (en) | 1982-07-29 | 1982-07-29 | Unloading system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000408663A CA1191032A (en) | 1982-07-29 | 1982-07-29 | Unloading system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1191032A true CA1191032A (en) | 1985-07-30 |
Family
ID=4123335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000408663A Expired CA1191032A (en) | 1982-07-29 | 1982-07-29 | Unloading system |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1191032A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9516811B1 (en) * | 2012-03-13 | 2016-12-13 | Ronald J. Kile | Combine harvester grain bulk tank unloading system |
-
1982
- 1982-07-29 CA CA000408663A patent/CA1191032A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9516811B1 (en) * | 2012-03-13 | 2016-12-13 | Ronald J. Kile | Combine harvester grain bulk tank unloading system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry | ||
| MKEX | Expiry |
Effective date: 20020730 |