CA1170918A - Airflow seeders - Google Patents
Airflow seedersInfo
- Publication number
- CA1170918A CA1170918A CA000394567A CA394567A CA1170918A CA 1170918 A CA1170918 A CA 1170918A CA 000394567 A CA000394567 A CA 000394567A CA 394567 A CA394567 A CA 394567A CA 1170918 A CA1170918 A CA 1170918A
- Authority
- CA
- Canada
- Prior art keywords
- inlets
- primary
- particulate material
- airflow
- conduit
- 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
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- Sowing (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
An airflow particulate material transfer arrange-ment for use with an airflow seeder in which a primary conduit has included subsequent to a particulate material inlet and before a first primary distribution location, a plurality of vanes to assist, firstly, to keep particulate material airlifted within the airflow and uniformly distributed and secondly adjust-able vanes to assist in providing final adjustment of uniformly proportioning particulate materials being driven in to each of the secondary conduits.
Advantage is also found in keeping the primary conduit from a fan to the primary distribution location of substantially constant cross-sectional area except in the vicinity of the particulate material inlet.
An airflow particulate material transfer arrange-ment for use with an airflow seeder in which a primary conduit has included subsequent to a particulate material inlet and before a first primary distribution location, a plurality of vanes to assist, firstly, to keep particulate material airlifted within the airflow and uniformly distributed and secondly adjust-able vanes to assist in providing final adjustment of uniformly proportioning particulate materials being driven in to each of the secondary conduits.
Advantage is also found in keeping the primary conduit from a fan to the primary distribution location of substantially constant cross-sectional area except in the vicinity of the particulate material inlet.
Description
~ 117091~
2.
This invention relates to an airflow particulate material transfer arrangement for an airflow seeder or other distribution devices of similar type.
It is now conventional to distribute seed such as wheat or other grain together with, if desired, fertilizer such as superphosphate from a bulk container through an airflow transfer arrangement to a seeder by which the material is located below earth within the ground.
A number of problems have been found to exist with this type of arrangement especially in achieving uniformity of particulate material distribution through each of the many conduits carrying the seed and fertilizer to each of the outlets and these problems are made worse when larger rates of particulate materials are required to be handled.
The problems are also accentuated by the need firstly to use means to provide a large supply of air at pressure which inherently causes this air to be strongly turbulent at such high velocities.
A further problem is that the material while being transported in the air stream must be kept suspended within the air stream even with maximum flow rates and must be kept uniformly distributed `~
9 :1 ~
for distribution through such vari.ation of rates of distributi.on.
~ urthermore, such distribution must be kept constant through significantly different environmental conditions and as well through some different orienta-tion of the members from time to time insofar that these are portable and are being drawn over agricultural land.
It is conventional, to provide a first distributed supply of seed and superphosphate, to have a conduit supplied by a fan with airflow, proceed below a bulk holding bin of seed and a bulk holding bin of other material such as fertilizer such as superphosphate and have this airflow then carry such introduced material through a primary conduit and then in uniformly distributed manner through a plurality of secondary conduits and finally, through secondary distribution heads into tertiary conduits.
This invention particularly relates to the difficulties relating to the supply of air and parti-culate materials from the fan to a primary distribution location and to difficulties associated with keeping particles suspended in such airflow stream.
The invention can be said to reside in an airflow particulate material transfer arrangement for an application such as an airELow seeder where there i.s a bulk particulate material bin, a fan, and a conduit extending from the fan, past a particulate material inlet to a primary distribution location, il7~918 4.
the arrangement being characterisecl according to this inventi.on in that the primary conduit incl~ldes between the particulate material :inlet and the primary distribution location and across a lowermost face of the conduit a deflecting vane arranged to deflect in an upward direction while the particulate material is proceeding in a forward direction, that is from the fan to the primary distribution locati.on, and positioned between this last mentioned vane and the primary distribution location and in a position to be in a -general path oE material upwardl.y deflected by the first said vane, a second vane located across an uppermost face of the conduit and arranged to downwardly deflect materia]. directed thereagainst.
By using deflector vanes in such a manner, it has been found especially for heavier flow rates that this provides significant advantage in keeping the particulate materials suspended in the airstream to a primary distributicn outlet.
Preferably, the primary distribution location includes a plurality of inlets to secondary conduits located each in adjacent relationship to others of the secondary conduits and all in a streamlined airflow path from the primary conduit.
Preferably, the inlets to the secondary conduits are located so as to collect approximately equal amounts of particulate material from that carried along the primary conduit, and a vane or vanes located in the primary conduit.in the immediately preceding vicinity of the primary distribution location, said vane or vanes being at least substantially aligned 9 1 ~
5.
in a substantially vertical plane and adjustable in position about a substantially vertical axis so as to enable adjustment of amounts of particulate materials being collected by the respective inlets.
Preferably, the primary conduit is of elongate proportion in cross-section at least in the vicinity of the primary distribution location with the sides of the elongate shape being substantially horizontal, therefore, being the upper and lower sides of the conduit and the inlets to the secondary conduits being uniformly distributed across the outlet of the primary conduit.
Preferably, the primary conduit from the outlet of the fan through to the secondary conduits is of substantially the same cross-sectional area except in the vicinity of the particulate material inlet.
Preferably, there are at least six secondary conduits, each having an inlet, the inlets being arranged so that each of the inlets is aligned with the other inlets across the primary conduit outlet with one inlet being adjacent at least one of the other inlets so that there is substantially symmetrical alignment of the inlets across the outlet of the primary conduit.
Preferably, the outlet of the primary conduit shape includes substantially planar upper and lower walls and substantially arcuate side walls.
" ~l7~sla 6.
Preferably, each of the vanes adjustable about a substantially vertical axis include adjustment means located externally of the primary conduit to enable adjustment of the vane position from outside 5. of the conduit.
Features of this invention will be better under-stood when referred to a preferred embodiment which will now be described wi.th the assistance of drawings in which:-10. FIG 1 is a view of an airflow seeder incorporating the preferred embodiment, the illustration being schematic and showing in side elevation working elements partly schematically and partly in cross-section, 15. FIG 2 is a side elevation in cross-section of a portion of the primary conduit existing between the particulate material inlet and the primary distri-bution location, FIG 3 is a plan view of the member comprising 20. a portion of the primary conduit as is shown in FIG 2, FIG 4 is an end view from the right hand side of the portion of the primary conduit as is shown in FIGS 2 and 3, 25. FIG 5 is a perspective view of the primary conduit including portion of the particulate material inlet and a portion of the primary distribution assembly, ~ 17~
7.
FIG 6 is a cross-sectional view along the lines of 6 - 6 in FIG 5, FIG 7 is a cross-sectional view along the lines of 7 - 7 ;n FIG 5, FIG 8 is a cross-sectional view along the lines 8 - 8 in FIG 5, and FIG 9 is a cross-sectional view along the lines 9 - 9 in FIG 5.
Referring now to the drawings in detail, there is shown an airflow seeder 1 which includes a bulk bin holder 2 including a bulk bin for fertilizer
This invention relates to an airflow particulate material transfer arrangement for an airflow seeder or other distribution devices of similar type.
It is now conventional to distribute seed such as wheat or other grain together with, if desired, fertilizer such as superphosphate from a bulk container through an airflow transfer arrangement to a seeder by which the material is located below earth within the ground.
A number of problems have been found to exist with this type of arrangement especially in achieving uniformity of particulate material distribution through each of the many conduits carrying the seed and fertilizer to each of the outlets and these problems are made worse when larger rates of particulate materials are required to be handled.
The problems are also accentuated by the need firstly to use means to provide a large supply of air at pressure which inherently causes this air to be strongly turbulent at such high velocities.
A further problem is that the material while being transported in the air stream must be kept suspended within the air stream even with maximum flow rates and must be kept uniformly distributed `~
9 :1 ~
for distribution through such vari.ation of rates of distributi.on.
~ urthermore, such distribution must be kept constant through significantly different environmental conditions and as well through some different orienta-tion of the members from time to time insofar that these are portable and are being drawn over agricultural land.
It is conventional, to provide a first distributed supply of seed and superphosphate, to have a conduit supplied by a fan with airflow, proceed below a bulk holding bin of seed and a bulk holding bin of other material such as fertilizer such as superphosphate and have this airflow then carry such introduced material through a primary conduit and then in uniformly distributed manner through a plurality of secondary conduits and finally, through secondary distribution heads into tertiary conduits.
This invention particularly relates to the difficulties relating to the supply of air and parti-culate materials from the fan to a primary distribution location and to difficulties associated with keeping particles suspended in such airflow stream.
The invention can be said to reside in an airflow particulate material transfer arrangement for an application such as an airELow seeder where there i.s a bulk particulate material bin, a fan, and a conduit extending from the fan, past a particulate material inlet to a primary distribution location, il7~918 4.
the arrangement being characterisecl according to this inventi.on in that the primary conduit incl~ldes between the particulate material :inlet and the primary distribution location and across a lowermost face of the conduit a deflecting vane arranged to deflect in an upward direction while the particulate material is proceeding in a forward direction, that is from the fan to the primary distribution locati.on, and positioned between this last mentioned vane and the primary distribution location and in a position to be in a -general path oE material upwardl.y deflected by the first said vane, a second vane located across an uppermost face of the conduit and arranged to downwardly deflect materia]. directed thereagainst.
By using deflector vanes in such a manner, it has been found especially for heavier flow rates that this provides significant advantage in keeping the particulate materials suspended in the airstream to a primary distributicn outlet.
Preferably, the primary distribution location includes a plurality of inlets to secondary conduits located each in adjacent relationship to others of the secondary conduits and all in a streamlined airflow path from the primary conduit.
Preferably, the inlets to the secondary conduits are located so as to collect approximately equal amounts of particulate material from that carried along the primary conduit, and a vane or vanes located in the primary conduit.in the immediately preceding vicinity of the primary distribution location, said vane or vanes being at least substantially aligned 9 1 ~
5.
in a substantially vertical plane and adjustable in position about a substantially vertical axis so as to enable adjustment of amounts of particulate materials being collected by the respective inlets.
Preferably, the primary conduit is of elongate proportion in cross-section at least in the vicinity of the primary distribution location with the sides of the elongate shape being substantially horizontal, therefore, being the upper and lower sides of the conduit and the inlets to the secondary conduits being uniformly distributed across the outlet of the primary conduit.
Preferably, the primary conduit from the outlet of the fan through to the secondary conduits is of substantially the same cross-sectional area except in the vicinity of the particulate material inlet.
Preferably, there are at least six secondary conduits, each having an inlet, the inlets being arranged so that each of the inlets is aligned with the other inlets across the primary conduit outlet with one inlet being adjacent at least one of the other inlets so that there is substantially symmetrical alignment of the inlets across the outlet of the primary conduit.
Preferably, the outlet of the primary conduit shape includes substantially planar upper and lower walls and substantially arcuate side walls.
" ~l7~sla 6.
Preferably, each of the vanes adjustable about a substantially vertical axis include adjustment means located externally of the primary conduit to enable adjustment of the vane position from outside 5. of the conduit.
Features of this invention will be better under-stood when referred to a preferred embodiment which will now be described wi.th the assistance of drawings in which:-10. FIG 1 is a view of an airflow seeder incorporating the preferred embodiment, the illustration being schematic and showing in side elevation working elements partly schematically and partly in cross-section, 15. FIG 2 is a side elevation in cross-section of a portion of the primary conduit existing between the particulate material inlet and the primary distri-bution location, FIG 3 is a plan view of the member comprising 20. a portion of the primary conduit as is shown in FIG 2, FIG 4 is an end view from the right hand side of the portion of the primary conduit as is shown in FIGS 2 and 3, 25. FIG 5 is a perspective view of the primary conduit including portion of the particulate material inlet and a portion of the primary distribution assembly, ~ 17~
7.
FIG 6 is a cross-sectional view along the lines of 6 - 6 in FIG 5, FIG 7 is a cross-sectional view along the lines of 7 - 7 ;n FIG 5, FIG 8 is a cross-sectional view along the lines 8 - 8 in FIG 5, and FIG 9 is a cross-sectional view along the lines 9 - 9 in FIG 5.
Referring now to the drawings in detail, there is shown an airflow seeder 1 which includes a bulk bin holder 2 including a bulk bin for fertilizer
3 and a bulk bin for seed, such as wheat, 4.
There are distribution means 6 to feed supplies of the particulate materials such as the seed and superphosphate into rotary valve 7 and by means of aerofoil arrangement 8 suck particulate materials into the primary conduit 9.
The primary conduit 9 is supplied with air by means of fan 10, the vanes of which are driven by means of motor drive 11.
The output of the fan 10 is directly driven into an input of the primary conduit 9 at 12 and the substantially square shape at this location of the primary conduit is then gradually converted to the elongate shape discernable further along the primary conduit.
` , 117091 8.
The air then is given sufEicient time to lose a significant proportion of its turbulence by reason of the distance from the fan 10 through to the particu-late material inlet at 8.
The difficulty from this location through to the primary distribution location 13 is to ensure that the air carrying the particulate material and the particulate material distribution as such that there will be generally equal amounts of particulate material entering the respective inlets of the secondary conduits 14.
These secondary conduits 14 in turn each proceed into a secondary distribution head 15 from whence further material is distributed shown in schematic fashion at 16 into outlet shoes 17.
The first difficulty is not only to ensure that all the material is suspended in the air stream but that it is distributed across the width of the primary conduit in more or less uniform fashion and this has been found to be most advantageously achieved by providing across a lowermost inner face of the conduit 18 an upwardly deflecting vane 19.
Somewhat further along and located between the vane 19 and the primary distribution location 13 is a second vane 20 located across an uppermost innerface of the conduit at 21 generally positioned to downwardly deflect material directed thereagainst but also to spread the material to generally have this extending uniformly across the width of the primary conduit.
1~091~
9.
This effect is surprising but it provides a very effective way of providing generally uniformly distributed material across the width of the primary conduit.
The location of the vanes 19 and 20 are preferably as shown generally as shown in FIGS 1, 2 and 3 but in detail this must be determined by experiment in any particular case so as to optimize the exact location dependant upon the type of internal surface of the primary conduit, the strength of air supply, and the specific character of the particulate material to be carried. In additon to the uniform spreading, there are vanes aligned in the substantially vertical direction, a first of these shown at 22 is intended to adjust and trim the balance of material across the width of the primary conduit which can easily be caused to vary by reason of small manufacturing tolerance differences and distortions in the shape and size of the various small elements making up the assembly.
Subsequent vanes however shown at 23 each orientat-ed so as to be in a generally or substantially vertical plane, that is when the whole of the arrangement is supported on a horizontal surface and are each adapted to be rotatable about a substantially vertical axis, the position of each of the vanes being controll-able by clamp means 24.
With four such vanes located at the medial line between each adjacent inlet to the secondary conduits 14, fine adjustment at least between adjacent inputs can be achieved.
` ~ 17091~
l() .
This i.s Louncl to be more important witll respect to tlle outer two vanes where the arcuate side shape of the ~rimary conduit shown at 25 and 26 does lead to a sl.ight clistortion i,n the collecting area an(l 5- there[ore urliEornllty of clistrib~lt;.on between the two outer iallets oE the seconclary conduits 14.
It wi.ll be noti.cecl that in cross-sectional shape, especially toward the further encl of the primary con(luit .i.s of elon&ate shape in cross-sec'tion 10. with the upper ancl lower sides 27 anci 28 substantially horizontal allcl planar in al;~nment while the two sides 25 anci 26 are preferably semi-circular in cross-sectional shape and in more general terminology arcuate.
15. The proporti.ons shown especially in ~IC,S 4 and thereafter illustrate the preEerred proportiens for the appl.icat;on in practice.
Eacl-- of the vanes, either 22 or 23, I-ave external . means shown at 29 in the case of vane 22 and, 30 20. in the case o~ vane 23, by which they can be corrected in positi.on externally ~rom the primary conduit 9.
A particularly useful feature has been to ensure that the cross-sectional area oL the primary conduit 25. from the outlet of the fan 10 throu,gh to the seconclary conduits 14 in cross-sectional area is substantially the same except in the vici.nity Or the particulate material inlet.
~1~09~
ll. . ' ln the area of the particulate material inlet the contraction in area is deliberately caused to increase the velocity oE the air passing thereby and thereby lower the pressure o air at least a 5. lowered air pressure relevant to ambient or preferably a negative pressure with the assistance of an aerofoil member within the airstream.
Separate from this then, as will be seen especially in FIGS 4, 6, 7 and 8, the respective cross-sectional lO. areas remain either identical or substantially the same so that the change from square to elongate as is shown in FIG 6 will be kept so that the area is the same through the transition of shape.
Referring to FIG 5, it will be seen here most 15. clearly that the primary conduit for practical con-struction purposes is made up of separable elements which are held together by sealable connections.
The means holding the various sections together are not sho~n for sake of simplicity but may be 20. any type of conventional clip.
Now having described the preferred embodiment it will be seen that in practice, there is now achiev-able for high application rates, a very good uniform distribution technique for at least the primary 25. to secondary distribution stage, this being one which will maintain such uniformity or allow accurate control of distribution.
There are distribution means 6 to feed supplies of the particulate materials such as the seed and superphosphate into rotary valve 7 and by means of aerofoil arrangement 8 suck particulate materials into the primary conduit 9.
The primary conduit 9 is supplied with air by means of fan 10, the vanes of which are driven by means of motor drive 11.
The output of the fan 10 is directly driven into an input of the primary conduit 9 at 12 and the substantially square shape at this location of the primary conduit is then gradually converted to the elongate shape discernable further along the primary conduit.
` , 117091 8.
The air then is given sufEicient time to lose a significant proportion of its turbulence by reason of the distance from the fan 10 through to the particu-late material inlet at 8.
The difficulty from this location through to the primary distribution location 13 is to ensure that the air carrying the particulate material and the particulate material distribution as such that there will be generally equal amounts of particulate material entering the respective inlets of the secondary conduits 14.
These secondary conduits 14 in turn each proceed into a secondary distribution head 15 from whence further material is distributed shown in schematic fashion at 16 into outlet shoes 17.
The first difficulty is not only to ensure that all the material is suspended in the air stream but that it is distributed across the width of the primary conduit in more or less uniform fashion and this has been found to be most advantageously achieved by providing across a lowermost inner face of the conduit 18 an upwardly deflecting vane 19.
Somewhat further along and located between the vane 19 and the primary distribution location 13 is a second vane 20 located across an uppermost innerface of the conduit at 21 generally positioned to downwardly deflect material directed thereagainst but also to spread the material to generally have this extending uniformly across the width of the primary conduit.
1~091~
9.
This effect is surprising but it provides a very effective way of providing generally uniformly distributed material across the width of the primary conduit.
The location of the vanes 19 and 20 are preferably as shown generally as shown in FIGS 1, 2 and 3 but in detail this must be determined by experiment in any particular case so as to optimize the exact location dependant upon the type of internal surface of the primary conduit, the strength of air supply, and the specific character of the particulate material to be carried. In additon to the uniform spreading, there are vanes aligned in the substantially vertical direction, a first of these shown at 22 is intended to adjust and trim the balance of material across the width of the primary conduit which can easily be caused to vary by reason of small manufacturing tolerance differences and distortions in the shape and size of the various small elements making up the assembly.
Subsequent vanes however shown at 23 each orientat-ed so as to be in a generally or substantially vertical plane, that is when the whole of the arrangement is supported on a horizontal surface and are each adapted to be rotatable about a substantially vertical axis, the position of each of the vanes being controll-able by clamp means 24.
With four such vanes located at the medial line between each adjacent inlet to the secondary conduits 14, fine adjustment at least between adjacent inputs can be achieved.
` ~ 17091~
l() .
This i.s Louncl to be more important witll respect to tlle outer two vanes where the arcuate side shape of the ~rimary conduit shown at 25 and 26 does lead to a sl.ight clistortion i,n the collecting area an(l 5- there[ore urliEornllty of clistrib~lt;.on between the two outer iallets oE the seconclary conduits 14.
It wi.ll be noti.cecl that in cross-sectional shape, especially toward the further encl of the primary con(luit .i.s of elon&ate shape in cross-sec'tion 10. with the upper ancl lower sides 27 anci 28 substantially horizontal allcl planar in al;~nment while the two sides 25 anci 26 are preferably semi-circular in cross-sectional shape and in more general terminology arcuate.
15. The proporti.ons shown especially in ~IC,S 4 and thereafter illustrate the preEerred proportiens for the appl.icat;on in practice.
Eacl-- of the vanes, either 22 or 23, I-ave external . means shown at 29 in the case of vane 22 and, 30 20. in the case o~ vane 23, by which they can be corrected in positi.on externally ~rom the primary conduit 9.
A particularly useful feature has been to ensure that the cross-sectional area oL the primary conduit 25. from the outlet of the fan 10 throu,gh to the seconclary conduits 14 in cross-sectional area is substantially the same except in the vici.nity Or the particulate material inlet.
~1~09~
ll. . ' ln the area of the particulate material inlet the contraction in area is deliberately caused to increase the velocity oE the air passing thereby and thereby lower the pressure o air at least a 5. lowered air pressure relevant to ambient or preferably a negative pressure with the assistance of an aerofoil member within the airstream.
Separate from this then, as will be seen especially in FIGS 4, 6, 7 and 8, the respective cross-sectional lO. areas remain either identical or substantially the same so that the change from square to elongate as is shown in FIG 6 will be kept so that the area is the same through the transition of shape.
Referring to FIG 5, it will be seen here most 15. clearly that the primary conduit for practical con-struction purposes is made up of separable elements which are held together by sealable connections.
The means holding the various sections together are not sho~n for sake of simplicity but may be 20. any type of conventional clip.
Now having described the preferred embodiment it will be seen that in practice, there is now achiev-able for high application rates, a very good uniform distribution technique for at least the primary 25. to secondary distribution stage, this being one which will maintain such uniformity or allow accurate control of distribution.
Claims (8)
THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An airflow particulate material transfer arrange-ment for an airflow seeder of a type including a bulk particulate material bin or bins, a fan, and a primary conduit extending from the fan past a particulate material inlet and thence to a primary distribution location whereby to distribute particulate material into a plurality of smaller secondary conduits, the arrangement being characterised according to this invention in that the primary conduit includes at least between the particulate material inlet and the primary distribution location across a lowermost inner face of the conduit, an upwardly deflecting vane to spread material directed thereagainst and positioned between this last mentioned vane and the primary distribution location, and in a position to be in a general path of material upwardly deflected by the first said vane, a second said vane located at an uppermost inner face of the conduit and arranged to downwardly deflect and spread material directed thereagainst.
2. An airflow particulate material transfer arrange-ment as in Claim 1 further characterised in that the primary distribution location includes a plurality of inlets to secondary conduits located each in adjacent relationship to others of the secondary conduits and all in a streamline airflow path from the primary conduit.
3. An airflow particulate material transfer arrangement as in either of Claims 1 or 2 further characterised in that the inlets to the secondary conduits are located so as to collect approximately equal amounts of particulate materials from that carried along the primary conduit, and a vane or vanes located in the primary conduit in the immediately pre-ceding vicinity of the primary distribution location, said vane or vanes being at least substantially aligned in a substantially vertical plane and adjustable in position about a substantially vertical axis so as to enable adjustment of the proportion of particulate materials being collected by the respective inlets.
4. An airflow particulate material transfer arrangement as in claim 1 or 2 in which the primary conduit is of elongate proportion in cross-section in at least in the vicinity of the primary distribution location with the longest sides of the elongation shape in cross-section being substantially horizontal and the inlets to the secondary conduits being substantially of the same size being uniformly distributed across the outlet of the primary conduit.
5. An airflow particulate material transfer arrangement as in either of Claims 1 or 2 further characterised in that the primary conduit from the fan through to the secondary conduits is of substantially the same area in cross-section throughout its length except in the vicinity of the particulate material inlet.
14.
14.
6. An airflow particulate material transfer arrange-ment as in either of Claims 1 or 2 further characterised in that there are at least six secondary conduits arranged with inlets located at the primary distribution location, each of the inlets being arranged with one of the inlets adjacent another of the inlets and such inlets being distributed in symmetrical alignment across the outlet of the primary conduit.
7. An airflow particulate material transfer arrange-ment as in either of Claims 1 or 2 further characterised in that there are at least six secondary conduits arranged with inlets located at the primary distribution location, each of the inlets being arranged with one of the inlets adjacent another of the inlets and such inlets being distributed in symmetrical alignment across the outlet of the primary conduit, and at least in the vicinity of the outlet of the primary conduit the shape of this includes substantially planar upper and lower walls and substantially arcuate side walls.
8. An airflow particulate material transfer arrange-ment as in either of Claims 1 or 2 further characterised in that the inlets to the secondary conduits are located so as to collect approximately equal amounts of particulate materials from that carried along the primary conduit, and a vane or vanes located in the primary conduit in the immediately preceding vicinity of the primary distribution location, said vane or vanes being at least substantially aligned in a substantially vertical plane and adjustable in position about a sub-stantially vertical axis so as to enable adjustment of the proportion of particulate materials being collected by the respective inlets, and each of the vanes which are adjustable about a substantially vertical axis include adjustment means located externally of the primary conduit to enable adjustment of the vane from outside of the primary conduit.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU7307/81 | 1981-01-20 | ||
| AUPE730781 | 1981-01-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1170918A true CA1170918A (en) | 1984-07-17 |
Family
ID=3768926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000394567A Expired CA1170918A (en) | 1981-01-20 | 1982-01-20 | Airflow seeders |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA1170918A (en) |
| ZA (1) | ZA82354B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4717289A (en) * | 1987-01-16 | 1988-01-05 | Morris Rod Weeder Company, Ltd. | Horizontally disposed apparatus for the random distribution of seeds and granular materials |
-
1982
- 1982-01-20 CA CA000394567A patent/CA1170918A/en not_active Expired
- 1982-01-20 ZA ZA82354A patent/ZA82354B/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4717289A (en) * | 1987-01-16 | 1988-01-05 | Morris Rod Weeder Company, Ltd. | Horizontally disposed apparatus for the random distribution of seeds and granular materials |
Also Published As
| Publication number | Publication date |
|---|---|
| ZA82354B (en) | 1982-12-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEC | Expiry (correction) | ||
| MKEX | Expiry |