CA1141225A - Beams for agricultural equipment - Google Patents
Beams for agricultural equipmentInfo
- Publication number
- CA1141225A CA1141225A CA000333771A CA333771A CA1141225A CA 1141225 A CA1141225 A CA 1141225A CA 000333771 A CA000333771 A CA 000333771A CA 333771 A CA333771 A CA 333771A CA 1141225 A CA1141225 A CA 1141225A
- Authority
- CA
- Canada
- Prior art keywords
- boom
- axis
- end sections
- central section
- wheeled frame
- 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
Landscapes
- Agricultural Machines (AREA)
Abstract
ABSTRACT OF THE INVENTION.
A folding boom construction comprising a wheeled frame, a boom disposed transversely of the wheeled frame, the boom being adapted to support one or more cultivating tools, the boom being coupled to the wheeled frame to be rotatable about a substantially transverse axis of the wheeled frame, the boom being rotatable about an axis transverse of the boom such that on rotation about the axis transverse to the wheeled frame the cul-tivating tools can be raised or lowered from the ground and when the tools are in the raised position the trans-verse axis is substantially upright such that the boom can be swung from the transverse position to a fore-and-aft position.
A folding boom construction comprising a wheeled frame, a boom disposed transversely of the wheeled frame, the boom being adapted to support one or more cultivating tools, the boom being coupled to the wheeled frame to be rotatable about a substantially transverse axis of the wheeled frame, the boom being rotatable about an axis transverse of the boom such that on rotation about the axis transverse to the wheeled frame the cul-tivating tools can be raised or lowered from the ground and when the tools are in the raised position the trans-verse axis is substantially upright such that the boom can be swung from the transverse position to a fore-and-aft position.
Description
~ lZ;~S
THIS INVENTION relates to an improved folding boom con-struction for agricultural e~uipment.
In various types of agricultural equipment operating com-ponents of the equipment are mounted on a wide boom which is positioned transversely of the direction of travel and it is necessary to fold the boom to allow the equipment to pass through gates and the like, and for transport. When the operating components comprise cultivating tools it is necessary to raise the tools from the ground before the boom can be folded.
It is an object of this invention to provide a folding boom construction in which the folding of the boom between the operative and transport position can be readily effected when cultivating tools are mounted on the boom.
In one form the invention resides in a folding boom con-struction comprising a wheeled frame adapted to be pulled in a direction parallel to the longitudinal axis thereof, a boom assembly adapted to carry tools and comprising a central section, first and second end sections and first and second universal joints each connecting one end of each of said end sections to a respective end of said central section for pivotal movement of said end sections relative to said central section about at least one axis, a pair of wheels each being mounted contiguous to the opposite end of a respective one of said end sections for rotation about a fixed axis that is parallel to the length of the respective end section, means for support-ing said boom central section on said wheeled frame for pivotal movement relative to said wheeled frame about a transverse axis, first hydraulic cylinder means interposed between said frame and said boom central section for pivo-ting said boom assembly relative to said frame about said transverse axis between an operative position in which the tools adapted to be carried by said boom assem~ly may engage the ground and a raised position in which the tools adapted to be carried by said boom assembly will be clear of the ground, said one axis of said universal joints being horizontally disposed when said boom assem-bly is in its operative position for pivotal movement of said boom end sections relative to said central section to conform to uneven ground conditions, said one axis of said universal joints being vertical disposed when said boom assembly is in its raised position, second hydraulic cylinder means interposed between said boom central section and each of said end boom sections, said second hydraulic cylinder means being operative for pivoting said boom end sections relative to said boom central section when said one axis is vertically disposed for movement of said boom end sections from an aligned position wherein said boom end sections are aligned with said boom central section and a storage position wherein said boom end sections extend generally parallel to the longitudinal axis of said wheeled frame, said wheels being adapted to support the respective end section ends during a substantial portion of their pivotal movement, a pair of rollers each mounted on a respective one of said end sections for rotating about an axis that is substantially parallel to and spaced from the axis of rotation of the wheel carried by the respective end sec-tion, and a pair or ramps each projecting downwardly and outwardly from a respective side of said frame, each of said ramps being so aligned with a respective one of said rollers that as said boom sections pivot from their aligned positions to their storage positions each of said rollers rolls up a respective one of said pair of ramps as said end sections move toward said storage posi-tion, thus lifting said wheels clear of the ground, the axis of said rollers each being spaced sufficiently from the axis of the wheel carried by the respective end sec--3a-tion so that said wheels will clear said ramps as said rollers engage said ramps to move said boom end sections to their storage positions.
The invention will be better understood by reference to the following description of one specific embodiment thereof as shown in the accompanying drawings:-Fig. 1 is a plan view of a folding boom constructionaccording to the embodiment with the boom in a folded position;
Fig. 2 is a plan view of the folding boom construc-tion with the boom in a transverse position;
Fig. 3 is a fragmentary plan view showing the coup-ling between the central section and one side section of the boom with the boom in ~he folded position;
Fig. 4 is a fragmentary plan view showing the coup-ling between the central section and one side section of the boom with the boom in the transverse position;
Fig. 5 is a fragmentary sectional elevation along the line 5-5 of Fig. 3 showing the coupling arrangement between the boom and the wheeled frame with the boom rotated such that the cultivating tools are in the raised position; and Fig 6 is a fragmentary sectional elevation along the line 5-5 of Fig. 3 showing the coupling arrangement between the boom and the wheeled frame with the boom ` 1141Z~
rotated such that the cultivating tools are in the lowered position;
~ig. 7 is a side elevational view showing the cultivating tool~ in a partially raised position; and Fig. 8 is a sectional elevation of the wheeled frame showing the ramps.
As shown in the drawings, a boom 11 is located trans-versely of a wheeled frame 13. The forward end of the wheeled frame 13 is fitted with means 15 for hitching it to a tractor or like towing vehicle. The boom is adapted to support cultivating tools 16 such as harrows.
In this embodiment the boom i~ located across the rear of the wheel frame 13 and includes a central section 17 and two side sections 19 disposed one on each side of the central section 17. The inner ends of the side ~ections 19 are each pivotally connected to the adjacent end of the central ~ection for rotation about at least one axis transverse of the boom. However, it i5 preferable that the inner ends of the side sections 19 are each pivotally connected to the adjacent end of the central section 17 by means of a universal joint 21 for rotation about any of a plurality of axes transverse of the boom. Each 6ide ~ection 19 is supported on a wheel 22 located at or towards the outer end thereof and tracking substantial parallel to the wheel~ of the wheeled frame. The boom is -`" li~l;~ZS
coupled to the wheeled frame to be rotatable about an axis 6ubstantially transver6e of the wheeled frame ~uch that the cultivating tools may be raised from or lowered into en~agement with the ground on rotation of the boom. In this embodiment the boom rotates through an angle of approximately 90 degrees as the cultivating tools move between the raised and lowered positions.
The boom may be coupled to the wheeled frame by pivotall~
mounting the central section 17 of the boom to the rear of the wheeled frame for rotation about an axis parallel to the central longitudinal axis of the boom. The rotational movement of the boom about the axis substanti<
transverse of the wheeled frame is effected by means of one or more first hydraulic rams 23 pivotally connected between the wheeled frame and one or more corresponding cranks 25 rigidly mounted on the central section 17 o~ t}
boom. A hydraulic ram 27 is coupled between the central section 17 and each side section 19 ~uch that on actuatit of the ram each side ~ection can be ewung about said axis transverse of the boom between the traneverse pos-ition and a fore-and-aft or folded pO6itiOn. In this embodiment each ram 27 is pivotally coupled between brackete 31 and 33 mounted on the central section 17 and side sections 19 respectively; each ram is preferably coupled between the brackete 31 and 33 by mean6 of universal joints 35. The rams 27 are mounted 6uch that the line6 of action thereof are each ~ub~tantially parallel to a line tran~ver~e of the particular axi~
about which the re~pective ~ide ~ection6 19 pivot when moving between the tran~ver6e and fore-and-aft positions.
When the boom 11 i6 in the transver6e positi~n with the cultivating tool6 in the lowered or operative position, the axe~ transverse of the boom about which the ~ide 6ections 19 pivot are ~ubstantially horizontal and 6ubstantially parallel to the longitudinal axi6 of the wheeled frame. The cultivating tools ar moved into the raised po~ition by rotating the boom about the axi~ ~ub-6tantially transverse of the wheeled frame ~uch that said axes tran~verse of the boom are in a sub6tantially upright position. The 6ide section6 19 may then be ~wung from the tran6verse position to the fore-and-aft or folded position.
A roller 39 is mounted on an axle supported between bracket6 41 mounted on each side 6ection 19 adjacent the wheel 2~; the axi6 of rotation of each roller is ~ub-~tantially parallel to the 3Xi6 of r~tation of it~
adjacent wheel 22. Each roller i6 adapted to ride up one of a pair of 6uitably located ramps 43 projecting outwardly and downwardly from the wheeled frame a~ the ~ide ~ection~ move to the fore-and-aft position, thu~
lifting the wheel~ 22 clear of the ground. The folding action of the boom is halted when the wheel6 22 butt lZ2S
, , against stop member6 45 fitted to the ramps. ~ydraulic pressure in the rams 27 maintain6 the boom in the folded position, however, locking mean6 may be provided to hold the boom in position as an additional 6afety measure.
Cables 47 extending between the wheeled frame and the sid sections 19 of the boom are provided to brace the boom when in its transver6e position. The cables 47 are maintained taut as the boom moves between the transver~e and fore-and-aft position by means of a weight (not hown) attached to each cable 47 by means of a further cable 49~ The weights are located in tubular upright members Sl which have guide means at their upper ends over which the cables 49 pass.
The two sets of hydraulic rams 23 and 27 controlling movement of the boom are coupled to a hydraulic circuit.
The two 6ets of rams may be controlled by separate contro levers or alternatively a hydraulic fluid by-pa6s 6y6tem may be provided such that when one set of rams has com-pleted its operation the second set become6 ~perational.
In use the boom i6 disposed tran6ver6ely of thé wheeled frame. When it is necessary to fold the boom to allow the unit to pass through a gate of the like, or for transport, the operator actuates the first set of hydraul rams 23 which cause the boom to pivot about 6aid axis ZS
transver6e to the wheeled frame, thus moving the cultivating tools from the lowered to the rai6ed positio A6 a result the axes which are transverse of the boom and about which the boom folds are moved from the substantially horizontal position to the ~ubstantially upri~ht position. When the operation of the first set o rams 23 has completed the second set of rams 27 become operational~ either from a hydraulic fluid by-pass from the first ~et of rams or by a 6eparate control lever actuated by the operator. Actuation of the second set of rams causes each side sections 19 of the boom to pivot towards the folded position about its respecti~e axis substantially transverse of the boom. As the ~ide sections 19 approach the wheeled frame the rollers 39 mounted on the side sections engage the ramps 43 on the frame; the rollers ride up the ramps, thus lifting the wheel6 22 clear of the ground. With the boom folded in this position, the equipment can be easily transported.
The sequence of operation of the sets of hydraulic rams 23 and 27 is reversed when the boom is to be re-turned to the operational position.
When the boom is in the transverse position with the cultivating tools in the lowered position the axes which are transverse of the boom and about which the ~ide sections 19 pivot are substantially horizGntal and sub-stantially parallel to the longitudinal axis of the ZZS
wheeled frame. Thus each 6ide 6ection i6 able to pivot with respect to the central section of the boom within a substantially vertical plane a6 the unit traverse6 uneven ground. A~ a result more uniform cultivation of the soil i6 obtainable than would otherwise be possible with a rigid boom. Although the ~ide section6 19 are braced by the cables 47, the universal joints 21 coupling each side 6ection to the central section of the boom permit a degree of relative movement in a 6ubstantially horizontal plane between the central 6ection and each ide section.
Although the invention has been described with reference to one specific embodiment it i6 not limited thereto as various alterations may be made without departing from the scope of the invention.
THIS INVENTION relates to an improved folding boom con-struction for agricultural e~uipment.
In various types of agricultural equipment operating com-ponents of the equipment are mounted on a wide boom which is positioned transversely of the direction of travel and it is necessary to fold the boom to allow the equipment to pass through gates and the like, and for transport. When the operating components comprise cultivating tools it is necessary to raise the tools from the ground before the boom can be folded.
It is an object of this invention to provide a folding boom construction in which the folding of the boom between the operative and transport position can be readily effected when cultivating tools are mounted on the boom.
In one form the invention resides in a folding boom con-struction comprising a wheeled frame adapted to be pulled in a direction parallel to the longitudinal axis thereof, a boom assembly adapted to carry tools and comprising a central section, first and second end sections and first and second universal joints each connecting one end of each of said end sections to a respective end of said central section for pivotal movement of said end sections relative to said central section about at least one axis, a pair of wheels each being mounted contiguous to the opposite end of a respective one of said end sections for rotation about a fixed axis that is parallel to the length of the respective end section, means for support-ing said boom central section on said wheeled frame for pivotal movement relative to said wheeled frame about a transverse axis, first hydraulic cylinder means interposed between said frame and said boom central section for pivo-ting said boom assembly relative to said frame about said transverse axis between an operative position in which the tools adapted to be carried by said boom assem~ly may engage the ground and a raised position in which the tools adapted to be carried by said boom assembly will be clear of the ground, said one axis of said universal joints being horizontally disposed when said boom assem-bly is in its operative position for pivotal movement of said boom end sections relative to said central section to conform to uneven ground conditions, said one axis of said universal joints being vertical disposed when said boom assembly is in its raised position, second hydraulic cylinder means interposed between said boom central section and each of said end boom sections, said second hydraulic cylinder means being operative for pivoting said boom end sections relative to said boom central section when said one axis is vertically disposed for movement of said boom end sections from an aligned position wherein said boom end sections are aligned with said boom central section and a storage position wherein said boom end sections extend generally parallel to the longitudinal axis of said wheeled frame, said wheels being adapted to support the respective end section ends during a substantial portion of their pivotal movement, a pair of rollers each mounted on a respective one of said end sections for rotating about an axis that is substantially parallel to and spaced from the axis of rotation of the wheel carried by the respective end sec-tion, and a pair or ramps each projecting downwardly and outwardly from a respective side of said frame, each of said ramps being so aligned with a respective one of said rollers that as said boom sections pivot from their aligned positions to their storage positions each of said rollers rolls up a respective one of said pair of ramps as said end sections move toward said storage posi-tion, thus lifting said wheels clear of the ground, the axis of said rollers each being spaced sufficiently from the axis of the wheel carried by the respective end sec--3a-tion so that said wheels will clear said ramps as said rollers engage said ramps to move said boom end sections to their storage positions.
The invention will be better understood by reference to the following description of one specific embodiment thereof as shown in the accompanying drawings:-Fig. 1 is a plan view of a folding boom constructionaccording to the embodiment with the boom in a folded position;
Fig. 2 is a plan view of the folding boom construc-tion with the boom in a transverse position;
Fig. 3 is a fragmentary plan view showing the coup-ling between the central section and one side section of the boom with the boom in ~he folded position;
Fig. 4 is a fragmentary plan view showing the coup-ling between the central section and one side section of the boom with the boom in the transverse position;
Fig. 5 is a fragmentary sectional elevation along the line 5-5 of Fig. 3 showing the coupling arrangement between the boom and the wheeled frame with the boom rotated such that the cultivating tools are in the raised position; and Fig 6 is a fragmentary sectional elevation along the line 5-5 of Fig. 3 showing the coupling arrangement between the boom and the wheeled frame with the boom ` 1141Z~
rotated such that the cultivating tools are in the lowered position;
~ig. 7 is a side elevational view showing the cultivating tool~ in a partially raised position; and Fig. 8 is a sectional elevation of the wheeled frame showing the ramps.
As shown in the drawings, a boom 11 is located trans-versely of a wheeled frame 13. The forward end of the wheeled frame 13 is fitted with means 15 for hitching it to a tractor or like towing vehicle. The boom is adapted to support cultivating tools 16 such as harrows.
In this embodiment the boom i~ located across the rear of the wheel frame 13 and includes a central section 17 and two side sections 19 disposed one on each side of the central section 17. The inner ends of the side ~ections 19 are each pivotally connected to the adjacent end of the central ~ection for rotation about at least one axis transverse of the boom. However, it i5 preferable that the inner ends of the side sections 19 are each pivotally connected to the adjacent end of the central section 17 by means of a universal joint 21 for rotation about any of a plurality of axes transverse of the boom. Each 6ide ~ection 19 is supported on a wheel 22 located at or towards the outer end thereof and tracking substantial parallel to the wheel~ of the wheeled frame. The boom is -`" li~l;~ZS
coupled to the wheeled frame to be rotatable about an axis 6ubstantially transver6e of the wheeled frame ~uch that the cultivating tools may be raised from or lowered into en~agement with the ground on rotation of the boom. In this embodiment the boom rotates through an angle of approximately 90 degrees as the cultivating tools move between the raised and lowered positions.
The boom may be coupled to the wheeled frame by pivotall~
mounting the central section 17 of the boom to the rear of the wheeled frame for rotation about an axis parallel to the central longitudinal axis of the boom. The rotational movement of the boom about the axis substanti<
transverse of the wheeled frame is effected by means of one or more first hydraulic rams 23 pivotally connected between the wheeled frame and one or more corresponding cranks 25 rigidly mounted on the central section 17 o~ t}
boom. A hydraulic ram 27 is coupled between the central section 17 and each side section 19 ~uch that on actuatit of the ram each side ~ection can be ewung about said axis transverse of the boom between the traneverse pos-ition and a fore-and-aft or folded pO6itiOn. In this embodiment each ram 27 is pivotally coupled between brackete 31 and 33 mounted on the central section 17 and side sections 19 respectively; each ram is preferably coupled between the brackete 31 and 33 by mean6 of universal joints 35. The rams 27 are mounted 6uch that the line6 of action thereof are each ~ub~tantially parallel to a line tran~ver~e of the particular axi~
about which the re~pective ~ide ~ection6 19 pivot when moving between the tran~ver6e and fore-and-aft positions.
When the boom 11 i6 in the transver6e positi~n with the cultivating tool6 in the lowered or operative position, the axe~ transverse of the boom about which the ~ide 6ections 19 pivot are ~ubstantially horizontal and 6ubstantially parallel to the longitudinal axi6 of the wheeled frame. The cultivating tools ar moved into the raised po~ition by rotating the boom about the axi~ ~ub-6tantially transverse of the wheeled frame ~uch that said axes tran~verse of the boom are in a sub6tantially upright position. The 6ide section6 19 may then be ~wung from the tran6verse position to the fore-and-aft or folded position.
A roller 39 is mounted on an axle supported between bracket6 41 mounted on each side 6ection 19 adjacent the wheel 2~; the axi6 of rotation of each roller is ~ub-~tantially parallel to the 3Xi6 of r~tation of it~
adjacent wheel 22. Each roller i6 adapted to ride up one of a pair of 6uitably located ramps 43 projecting outwardly and downwardly from the wheeled frame a~ the ~ide ~ection~ move to the fore-and-aft position, thu~
lifting the wheel~ 22 clear of the ground. The folding action of the boom is halted when the wheel6 22 butt lZ2S
, , against stop member6 45 fitted to the ramps. ~ydraulic pressure in the rams 27 maintain6 the boom in the folded position, however, locking mean6 may be provided to hold the boom in position as an additional 6afety measure.
Cables 47 extending between the wheeled frame and the sid sections 19 of the boom are provided to brace the boom when in its transver6e position. The cables 47 are maintained taut as the boom moves between the transver~e and fore-and-aft position by means of a weight (not hown) attached to each cable 47 by means of a further cable 49~ The weights are located in tubular upright members Sl which have guide means at their upper ends over which the cables 49 pass.
The two sets of hydraulic rams 23 and 27 controlling movement of the boom are coupled to a hydraulic circuit.
The two 6ets of rams may be controlled by separate contro levers or alternatively a hydraulic fluid by-pa6s 6y6tem may be provided such that when one set of rams has com-pleted its operation the second set become6 ~perational.
In use the boom i6 disposed tran6ver6ely of thé wheeled frame. When it is necessary to fold the boom to allow the unit to pass through a gate of the like, or for transport, the operator actuates the first set of hydraul rams 23 which cause the boom to pivot about 6aid axis ZS
transver6e to the wheeled frame, thus moving the cultivating tools from the lowered to the rai6ed positio A6 a result the axes which are transverse of the boom and about which the boom folds are moved from the substantially horizontal position to the ~ubstantially upri~ht position. When the operation of the first set o rams 23 has completed the second set of rams 27 become operational~ either from a hydraulic fluid by-pass from the first ~et of rams or by a 6eparate control lever actuated by the operator. Actuation of the second set of rams causes each side sections 19 of the boom to pivot towards the folded position about its respecti~e axis substantially transverse of the boom. As the ~ide sections 19 approach the wheeled frame the rollers 39 mounted on the side sections engage the ramps 43 on the frame; the rollers ride up the ramps, thus lifting the wheel6 22 clear of the ground. With the boom folded in this position, the equipment can be easily transported.
The sequence of operation of the sets of hydraulic rams 23 and 27 is reversed when the boom is to be re-turned to the operational position.
When the boom is in the transverse position with the cultivating tools in the lowered position the axes which are transverse of the boom and about which the ~ide sections 19 pivot are substantially horizGntal and sub-stantially parallel to the longitudinal axis of the ZZS
wheeled frame. Thus each 6ide 6ection i6 able to pivot with respect to the central section of the boom within a substantially vertical plane a6 the unit traverse6 uneven ground. A~ a result more uniform cultivation of the soil i6 obtainable than would otherwise be possible with a rigid boom. Although the ~ide section6 19 are braced by the cables 47, the universal joints 21 coupling each side 6ection to the central section of the boom permit a degree of relative movement in a 6ubstantially horizontal plane between the central 6ection and each ide section.
Although the invention has been described with reference to one specific embodiment it i6 not limited thereto as various alterations may be made without departing from the scope of the invention.
Claims (3)
1. A folding boom construction comprising a wheeled frame adapted to be pulled in a direction parallel to the longitudinal axis thereof, a boom assembly adapted to carry tools and comprising a central section, first and second end sections and first and second universal joints each connecting one end of each of said end sections to a respective end of said central section for pivotal move-ment of said end sections relative to said central section about at least one axis, a pair of wheels each being moun-ted contiguous to the opposite end of a respective one of said end sections for rotation about a fixed axis that is parallel to the length of the respective end section, means for supporting said boom central section on said wheeled frame for pivotal movement relative to said whee-led frame about a transverse axis, first hydraulic cylin-der means interposed between said frame and said boom cen-tral section for pivoting said boom assembly relative to said frame about said transverse axis between an operative position in which the tools adapted to be carried by said boom assembly may engage the ground and a raised position in which the tools adapted to be carried by said boom assembly will be clear of the ground, said one axis of said universal joints being horizontally disposed when said boom assembly is in its operative position for pivo-tal movement of said boom end sections relative to said central section to conform to uneven ground conditions, said one axis of said universal joints being vertical dis-posed when said boom assembly is in its raised position, second hydraulic cylinder means interposed between said boom central section and each of said end boom sections, said second hydraulic cylinder means being operative for pivoting said boom end sections relative to said boom central section when said one axis is vertically disposed for movement of said boom end sections from an aligned position wherein said boom end sections are aligned with said boom central section and a storage position wherein said boom end sections extend generally parallel to the longitudinal axis of said wheeled frame, said wheels being adapted to support the respective end section ends during a substantial portion of their pivotal movement, a pair of rollers each mounted on a respective one of said end sections for rotating about an axis that is substantially parallel to and spaced from the axis of rotation of the wheel carried by the respective end sec-tion, and a pair or ramps each projecting downwardly and outwardly from a respective side of said frame, each of said ramps being so aligned with a respective one of said rollers that as said boom sections pivot from their aligned positions to their storage positions each of said rollers rolls up a respective one of said pair of ramps as said end sections move toward said storage posi-tion, thus lifting said wheels clear of the ground, the axis of said rollers each being spaced sufficiently from the axis of the wheel carried by the respective end sec-tion so that said wheels will clear said ramps as said rollers engage said ramps to move said boom end sections to their storage positions.
2. A folding boom construction as claimed in claim 1 wherein a cable extends between each side of the wheeled frame and a respective one of the end sections so as to brace the boom assembly when in the aligned position.
3. A folding boom construction as claimed in claim 1 or 2, wherein the second hydraulic cylinder means consists of a pair of hydraulic cylinder assemblies and having means for pivotally connecting one component of each of said pair of cylinder assemblies directly to a respective end of the boom center section and means for directly pivotally connecting the other component of each of said cylinder assemblies to a respective one of said boom end sections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000333771A CA1141225A (en) | 1979-08-13 | 1979-08-13 | Beams for agricultural equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000333771A CA1141225A (en) | 1979-08-13 | 1979-08-13 | Beams for agricultural equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1141225A true CA1141225A (en) | 1983-02-15 |
Family
ID=4114930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000333771A Expired CA1141225A (en) | 1979-08-13 | 1979-08-13 | Beams for agricultural equipment |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1141225A (en) |
-
1979
- 1979-08-13 CA CA000333771A patent/CA1141225A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |