US20010022226A1 - Three-point hitch for a tractor - Google Patents
Three-point hitch for a tractor Download PDFInfo
- Publication number
- US20010022226A1 US20010022226A1 US09/760,351 US76035101A US2001022226A1 US 20010022226 A1 US20010022226 A1 US 20010022226A1 US 76035101 A US76035101 A US 76035101A US 2001022226 A1 US2001022226 A1 US 2001022226A1
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- United States
- Prior art keywords
- hitch
- tractor
- piston
- point hitch
- lower links
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B59/00—Devices specially adapted for connection between animals or tractors and agricultural machines or implements
- A01B59/06—Devices specially adapted for connection between animals or tractors and agricultural machines or implements for machines mounted on tractors
- A01B59/066—Devices specially adapted for connection between animals or tractors and agricultural machines or implements for machines mounted on tractors of the type comprising at least two lower arms and one upper arm generally arranged in a triangle (e.g. three-point hitches)
- A01B59/068—Devices specially adapted for connection between animals or tractors and agricultural machines or implements for machines mounted on tractors of the type comprising at least two lower arms and one upper arm generally arranged in a triangle (e.g. three-point hitches) the lower arms being lifted or lowered by power actuator means provided externally on the tractor
Definitions
- Our present invention relates to a three-point hitch for a tractor and capable of raising and lowering and/or swinging an attachment which can be mounted by the three-point hitch on the front or rear of the tractor.
- the three-point hitch of a tractor can be utilized to affix an attachment to the tractor and for raising, lowering or swinging that attachment.
- the attachment is usually an agricultural appliance or a soil-working or ground-working tool.
- Typical attachments for a tractor are attachments such as blades or the like for modifying ground contours, agricultural attachments such as fertilizing, harvesting and cultivating attachments including plows, harrows, manure spreaders and the like.
- the three-point hitch permits the position of the attachment to be raised or lowered on the tractor and the three-point hitch also serves to enable the working height to be adjusted.
- the three-point hitch normally has some actuator for the lower links, the upper link being generally passive.
- the hitch may also be associated with a control system for maintaining a position of the attachment with respect to the ground in spite of irregularities in the latter.
- Another object of the invention is to provide a low cost three-point hitch of high versatility.
- a hitch bracket is provided for mounting on the tractor and the lower links are swingable on the hitch bracket or relative to the hitch bracket at the tractor side at lower pivots while the upper link is swingable on the hitch bracket at the tractor side at an upper pivot.
- the lower links have, at their attachment side or ends lower coupling points while the upper link has at the attachment side an upper coupling point for connection to the attachment at points which lie at the vertices of a triangle.
- the lower links and/or the upper link can be provided with piston-and-cylinder units for raising, lowering and/or swinging them.
- pivots at the tractor side of course, those pivots need not be provided directly on the tractor but need only be provided on the side of the links toward the tractor, e.g. on the hitch bracket, on the tractor itself or a structure intervening between the links and the tractor.
- the three-point hitch of the present invention is suitable for attachment to the front and/or rear on a tractor and can be a unit premounted with all of its components and preadjusted so that it can be attached to the tractor as a unit or can be affixed to a tractor which does not have such a hitch.
- the hitch therefore, can be used to retrofit a tractor or other vehicle with the system for raising, lowering and swinging the coupling points for attachment.
- the hitch bracket itself may be equipped with a raisable and lowerable connection to the tractor and can be selectively used as a pickup hitch or an adjustable draw bar or the like.
- the invention in addition, provides a three-point suspension for an attachment with a kinematic relationship corresponding to a linear or slightly progressive lifting force characteristic. It is useful for large and small loads and can provide both a longitudinal and lateral inclination adjustment.
- the invention also provides that stabilizers can be connected to the lower links.
- the stabilizers can be, for example, piston-and-cylinder units which are pivotally connected on the one hand to the tractor and on the other hand to the lower links.
- the stabilizers can be piston-and-cylinder units which are integrated in the lower links and are oriented substantially perpendicular to the longitudinal axis of the tractor and can have piston rods carrying stabilizer jaws which engage cams provided on the hitch bracket and extending in the direction of the tractor longitudinal axis. The lateral forces can thus be taken up by these piston-and-cylinder units.
- lever or other force-transmission ratio devices can be provided to control the sway or effect the raising and lowering movement.
- relatively small piston-and-cylinder units can be used with comparatively short strokes.
- the invention enables the system to be free from the customary connections to the rear axle of the tractor. After lifting of the attachment from the ground or out of the ground, the electronic circuitry which may be coupled to the stabilizers and other piston-and-cylinder units and which can be responsive to detection of the stroke thereof can automatically switch the stabilizers into a “rigid” status.
- the stroke can be measured by a potentiometer or limit switch.
- the three-point hitch of the invention can fulfill all of the requirements established by the German Industrial Standards (DIN) and the VDI standards for upper links, lower links, lifting rods and three-point hitches for rear mounting on a tractor, including the safety requirements.
- the lower links can be formed from two plug-in link parts whereby the front link parts can have receptacles for the stabilizers or can be premounted with the stabilizers.
- Both sides of the hitch bracket can be equipped with mounts, especially mounting cheeks for the cylinder unit acting upon the lower links.
- the mounts have U-shaped cross sections and can partly or fully receive the cylinder units.
- the cylinder units can be pivotally connected, via appropriate bearings, with the mount while the lower end of the cylinder unit can be coupled with the lower link by a respective fork and, if desired, with bearings at the pivots. The result is a so-called “drawing cylinder”.
- the piston unit is connected pivotally via an appropriate bearing arrangement with the mount while at the upper end, the cylinder unit works via a lever to actuate the rod.
- Bearings are provided here too between the pivot connection of the cylinder unit with the lever and the lever with the mount.
- a further bearing arrangement can be provided between the rod and the lever.
- the cylinder unit is a lifting cylinder.
- the upper link can be formed as a piston-and-cylinder unit as well and the latter can act on the triangular construction interconnecting the coupling points.
- the hitch described is simple and reliable and is of comparatively small size and weight so that it can be fabricated at lower cost than heretofore.
- the compact construction is a function in part of the rearward shift of the pivot points for the lower links as well as the shift in positions of the cylinder units.
- the arrangement and configuration of the stabilizers also contributes to a reduction in the size and weight of the three-point hitch.
- the three-point hitch of the invention does not require mounting of a variety of components on the transmission casing of the tractor and there is more room at the back or front of the tractor, utilizing the system of the invention.
- the fact that the stabilizers act inwardly ensures a greater amount of space for the tractor cylinders.
- the stabilizers have been found to be highly advantageous for small tractors, i.e. tractors suitable for horticulture and viniculture.
- the cabling of the system can be independent of the mounting of the three-point hitch on the tractor and that, of course, can contribute to a saving in mounting costs.
- Another cost conserving feature is the elimination of any need to modify the transmission to accommodate parts of the three-point hitch.
- the three-point hitch of the invention also reduces the forces which are applied via the hitch bracket to the tractor.
- FIG. 1 is a perspective view of a three-point hitch located between two wheels of a tractor shown schematically;
- FIG. 2 is a detail perspective view of the hitch of FIG. 1 without the tractor wheels;
- FIG. 3 is a view similar to FIG. 1 of a modified tractor hitch according to the invention.
- FIG. 4 is a view similar to FIG. 2 of the tractor hitch of FIG. 3;
- FIG. 5 is a side elevational view of the hitch of FIGS. 3 and 4 showing the kinematics thereof;
- FIG. 6 is a perspective view illustrating a modified system
- FIG. 7 is a side elevational view of the hitch of FIG. 6 showing the kinematics thereof.
- the three-point hitch of the invention comprises a hitch bracket 3 which, at the tractor side of the lower links 5 can form lower pivots 4 and for the upper link 7 can form an upper pivot point 6 .
- the lower links 5 are usually connected with the tractor transmission housing via pins at the respective pivot points 4 . This connection can be directly to the transmission housing or to the transmission housing via the bracket as may be advantageous.
- the lower links 5 have respective lower coupling points 8 which can be upwardly open notches engaging from beneath a bar of the attachment.
- the attachment can have a triangular structure 20 whose bar can rest in the notches 8 .
- the upper link 7 can be connected to the attachment, e.g. via the triangular structure 20 , at an upper coupling point 9 also via a pin.
- the lower links 5 are actuatable, i.e. raisable and lowerable, by piston-and-cylinder units 10 .
- the upper link 7 in the embodiments shown can be formed by a piston-and-cylinder unit itself.
- the lower links 5 are connected to stabilizers 11 and 12 .
- the stabilizers are piston-and-cylinder units 11 which are connected directly to the tractor 1 by hinge plates 30 and 31 .
- the stabilizers comprise piston-and-cylinder units 12 integrated into the lower links 5 and oriented substantially orthogonally to the tractor axis which is parallel to the plane of the paper in FIG. 5.
- Each of the piston rods of the cylinder units 12 in FIGS. 3 - 7 carries a stabilizing jaw 14 which engages a cam 15 extending in the direction of the longitudinal axis of the tractor.
- the lower links 5 can be formed by two plug-in link parts of which the front link part has a seat for the respective stabilizer 12 .
- the hitch bracket 3 has, on opposite sides thereof, mounting cheeks or mounts 16 for the piston-and-cylinder units 10 which act upon the lower links 5 .
- These mounts 16 are of U-shaped cross section and receive the cylinder units 10 .
- these cylinder units 10 are pivotally connected at 32 at their bottoms to the mounts 16 and have piston rods 33 which are pivotally connected at 34 to levers 17 which, in turn, are fulcrumed at 35 on the mounts 16 .
- the levers 17 are articulated at 36 to lifting rods 18 whose forks 37 are pivotally connected at 38 to the respective links 5 .
- the pivots formed at 32 , 34 , 35 , 36 and 38 are provided with roller or ball-bearings or any other convenient type of low-play bearing, e.g. swivel bearings.
- the cylinder unit 7 forming the upper link can have a piston rod pivotally connected at 9 to the triangular structure 20 while the cylinder is pivotally connected at 39 to a pair of plates 40 forming part of the bracket 3 .
- the pivots 9 and 39 also can be provided with appropriate bearings.
- the triangular structure 20 is preferred, it can be omitted and in such cases the upper and lower links can be provided with catcher jaws, hooks or the like for automatic grouping of pins or similar structures on the attachment directly.
- FIGS. 6 and 7. Such an arrangement has been shown in FIGS. 6 and 7.
- the piston-and-cylinder units 10 are pivotally connected at their upper ends at 41 to the mounts 16 while their piston rods 42 engage via the forks 43 and the swivel bearings 44 the respective links 5 . All of the bearings mentioned previously may also be swivel bearings as has been noted.
- the three-point hitch may also be provided with a trailer coupling 21 formed on the bracket 3 .
- the trailer coupling shown in FIG. 6 is of the automatic type and is provided at a low point on the bracket 3 to allow maximum space for the other elements of the hitch and any attachments to be joined thereto.
- the three-point hitch of the invention can be utilized effectively with attachments like plows which mainly are accommodated in the lower third of the lifting capacity of the hitch.
- the lower links 5 can be synchronously raised and lowered by the cylinder units 10 and the transverse inclination of the attachment 2 can be adjusted by varying the positions of the two lower links.
- the transverse inclination can be held constant over the entire vertical stroke or only a portion thereof. Usually, however, the transverse inclination is a function of the terrain.
- the inclination both in the longitudinal and in the transverse direction can be adjusted automatically or manually, the longitudinal inclination being a function of the extension of the upper link 7 .
- a control unit 50 can be provided which operates the hydraulic systems 51 supplying the cylinders.
- the pistons in that case maybe provided with displacement sensors 52 , 53 and 54 , for example, signalling the positions of the pistons to the control unit 50 .
- the tendency of the three-point hitch to swing from side to side is a function of the soil parameters (heavier or lighter soil) and can be limited through hydraulic throttling of the hydraulic fluid of the cylinders 11 .
- the control unit 50 is preferably an electronic controller which can be programmed for different modes of operation and can respond to the positions of the various pistons.
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- Life Sciences & Earth Sciences (AREA)
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Agricultural Machines (AREA)
- Contacts (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
Description
- Our present invention relates to a three-point hitch for a tractor and capable of raising and lowering and/or swinging an attachment which can be mounted by the three-point hitch on the front or rear of the tractor.
- The three-point hitch of a tractor can be utilized to affix an attachment to the tractor and for raising, lowering or swinging that attachment. The attachment is usually an agricultural appliance or a soil-working or ground-working tool. Typical attachments for a tractor are attachments such as blades or the like for modifying ground contours, agricultural attachments such as fertilizing, harvesting and cultivating attachments including plows, harrows, manure spreaders and the like.
- The three-point hitch permits the position of the attachment to be raised or lowered on the tractor and the three-point hitch also serves to enable the working height to be adjusted.
- For this purpose the three-point hitch normally has some actuator for the lower links, the upper link being generally passive.
- In modern tractors, the hitch may also be associated with a control system for maintaining a position of the attachment with respect to the ground in spite of irregularities in the latter.
- It is an object of the present invention to provide a three-point hitch for the purposes described which is especially simple and reliable and can provide an optimum lifting force characteristic, a reduced overall height or size and significantly less weight than earlier three-point hitches.
- Another object of the invention is to provide a low cost three-point hitch of high versatility.
- These objects are attained, in accordance with the invention in a three-point hitch for a tractor or other vehicle upon which an attachment may be mounted which is capable of raising or lowering or swinging the attachment and which can be mounted on the front and/or the rear of the tractor. According to the invention, a hitch bracket is provided for mounting on the tractor and the lower links are swingable on the hitch bracket or relative to the hitch bracket at the tractor side at lower pivots while the upper link is swingable on the hitch bracket at the tractor side at an upper pivot.
- The lower links have, at their attachment side or ends lower coupling points while the upper link has at the attachment side an upper coupling point for connection to the attachment at points which lie at the vertices of a triangle. The lower links and/or the upper link can be provided with piston-and-cylinder units for raising, lowering and/or swinging them. When reference is made to pivots at the tractor side, of course, those pivots need not be provided directly on the tractor but need only be provided on the side of the links toward the tractor, e.g. on the hitch bracket, on the tractor itself or a structure intervening between the links and the tractor. The three-point hitch of the present invention is suitable for attachment to the front and/or rear on a tractor and can be a unit premounted with all of its components and preadjusted so that it can be attached to the tractor as a unit or can be affixed to a tractor which does not have such a hitch. The hitch, therefore, can be used to retrofit a tractor or other vehicle with the system for raising, lowering and swinging the coupling points for attachment.
- The hitch bracket itself may be equipped with a raisable and lowerable connection to the tractor and can be selectively used as a pickup hitch or an adjustable draw bar or the like. The invention, in addition, provides a three-point suspension for an attachment with a kinematic relationship corresponding to a linear or slightly progressive lifting force characteristic. It is useful for large and small loads and can provide both a longitudinal and lateral inclination adjustment. The invention also provides that stabilizers can be connected to the lower links. The stabilizers can be, for example, piston-and-cylinder units which are pivotally connected on the one hand to the tractor and on the other hand to the lower links. In a preferred embodiment, however, the stabilizers can be piston-and-cylinder units which are integrated in the lower links and are oriented substantially perpendicular to the longitudinal axis of the tractor and can have piston rods carrying stabilizer jaws which engage cams provided on the hitch bracket and extending in the direction of the tractor longitudinal axis. The lateral forces can thus be taken up by these piston-and-cylinder units.
- According to a feature of the invention, lever or other force-transmission ratio devices can be provided to control the sway or effect the raising and lowering movement. With such devices, relatively small piston-and-cylinder units can be used with comparatively short strokes.
- The invention enables the system to be free from the customary connections to the rear axle of the tractor. After lifting of the attachment from the ground or out of the ground, the electronic circuitry which may be coupled to the stabilizers and other piston-and-cylinder units and which can be responsive to detection of the stroke thereof can automatically switch the stabilizers into a “rigid” status.
- The stroke can be measured by a potentiometer or limit switch. The three-point hitch of the invention can fulfill all of the requirements established by the German Industrial Standards (DIN) and the VDI standards for upper links, lower links, lifting rods and three-point hitches for rear mounting on a tractor, including the safety requirements.
- The lower links can be formed from two plug-in link parts whereby the front link parts can have receptacles for the stabilizers or can be premounted with the stabilizers.
- Both sides of the hitch bracket can be equipped with mounts, especially mounting cheeks for the cylinder unit acting upon the lower links. The mounts have U-shaped cross sections and can partly or fully receive the cylinder units. The cylinder units can be pivotally connected, via appropriate bearings, with the mount while the lower end of the cylinder unit can be coupled with the lower link by a respective fork and, if desired, with bearings at the pivots. The result is a so-called “drawing cylinder”.
- In another embodiment, the piston unit is connected pivotally via an appropriate bearing arrangement with the mount while at the upper end, the cylinder unit works via a lever to actuate the rod. Bearings are provided here too between the pivot connection of the cylinder unit with the lever and the lever with the mount. A further bearing arrangement can be provided between the rod and the lever. In this case the cylinder unit is a lifting cylinder.
- Of course, the upper link can be formed as a piston-and-cylinder unit as well and the latter can act on the triangular construction interconnecting the coupling points. The hitch described is simple and reliable and is of comparatively small size and weight so that it can be fabricated at lower cost than heretofore. The compact construction is a function in part of the rearward shift of the pivot points for the lower links as well as the shift in positions of the cylinder units. The arrangement and configuration of the stabilizers also contributes to a reduction in the size and weight of the three-point hitch.
- The three-point hitch of the invention does not require mounting of a variety of components on the transmission casing of the tractor and there is more room at the back or front of the tractor, utilizing the system of the invention. The fact that the stabilizers act inwardly ensures a greater amount of space for the tractor cylinders. The stabilizers have been found to be highly advantageous for small tractors, i.e. tractors suitable for horticulture and viniculture. The cabling of the system can be independent of the mounting of the three-point hitch on the tractor and that, of course, can contribute to a saving in mounting costs. Another cost conserving feature is the elimination of any need to modify the transmission to accommodate parts of the three-point hitch. The three-point hitch of the invention also reduces the forces which are applied via the hitch bracket to the tractor.
- The above and other objects, features, and advantages will become more readily apparent from the following description, reference being made to the accompanying drawing in which:
- FIG. 1 is a perspective view of a three-point hitch located between two wheels of a tractor shown schematically;
- FIG. 2 is a detail perspective view of the hitch of FIG. 1 without the tractor wheels;
- FIG. 3 is a view similar to FIG. 1 of a modified tractor hitch according to the invention;
- FIG. 4 is a view similar to FIG. 2 of the tractor hitch of FIG. 3;
- FIG. 5 is a side elevational view of the hitch of FIGS. 3 and 4 showing the kinematics thereof;
- FIG. 6 is a perspective view illustrating a modified system; and
- FIG. 7 is a side elevational view of the hitch of FIG. 6 showing the kinematics thereof.
- In the drawing I have shown three-point hitches for a
tractor 1 or some other towing or utility vehicle for raising, lowering and/or swinging an attachment which is to be affixed by this hitch on the rear of the tractor or on the front thereof. - The three-point hitch of the invention comprises a
hitch bracket 3 which, at the tractor side of thelower links 5 can formlower pivots 4 and for theupper link 7 can form anupper pivot point 6. - The
lower links 5 are usually connected with the tractor transmission housing via pins at therespective pivot points 4. This connection can be directly to the transmission housing or to the transmission housing via the bracket as may be advantageous. - At the side of the attachment, the
lower links 5 have respectivelower coupling points 8 which can be upwardly open notches engaging from beneath a bar of the attachment. In many cases the attachment can have atriangular structure 20 whose bar can rest in thenotches 8. At the attachment side, moreover, theupper link 7 can be connected to the attachment, e.g. via thetriangular structure 20, at anupper coupling point 9 also via a pin. - The
lower links 5 are actuatable, i.e. raisable and lowerable, by piston-and-cylinder units 10. Theupper link 7 in the embodiments shown can be formed by a piston-and-cylinder unit itself. Thelower links 5 are connected tostabilizers cylinder units 11 which are connected directly to thetractor 1 byhinge plates cylinder units 12 integrated into thelower links 5 and oriented substantially orthogonally to the tractor axis which is parallel to the plane of the paper in FIG. 5. - Each of the piston rods of the
cylinder units 12 in FIGS. 3-7 carries a stabilizingjaw 14 which engages acam 15 extending in the direction of the longitudinal axis of the tractor. Thelower links 5 can be formed by two plug-in link parts of which the front link part has a seat for therespective stabilizer 12. - The
hitch bracket 3 has, on opposite sides thereof, mounting cheeks or mounts 16 for the piston-and-cylinder units 10 which act upon thelower links 5. These mounts 16 are of U-shaped cross section and receive thecylinder units 10. - In the embodiment of FIGS.1-5, these
cylinder units 10 are pivotally connected at 32 at their bottoms to themounts 16 and have piston rods 33 which are pivotally connected at 34 tolevers 17 which, in turn, are fulcrumed at 35 on themounts 16. Thelevers 17, in turn, are articulated at 36 to liftingrods 18 whoseforks 37 are pivotally connected at 38 to therespective links 5. The pivots formed at 32, 34,35, 36 and 38 are provided with roller or ball-bearings or any other convenient type of low-play bearing, e.g. swivel bearings. - Similarly, the
cylinder unit 7 forming the upper link can have a piston rod pivotally connected at 9 to thetriangular structure 20 while the cylinder is pivotally connected at 39 to a pair ofplates 40 forming part of thebracket 3. Thepivots 9 and 39 also can be provided with appropriate bearings. - While the
triangular structure 20 is preferred, it can be omitted and in such cases the upper and lower links can be provided with catcher jaws, hooks or the like for automatic grouping of pins or similar structures on the attachment directly. Such an arrangement has been shown in FIGS. 6 and 7. In this embodiment as well, the piston-and-cylinder units 10 are pivotally connected at their upper ends at 41 to themounts 16 while theirpiston rods 42 engage via theforks 43 and theswivel bearings 44 therespective links 5. All of the bearings mentioned previously may also be swivel bearings as has been noted. - The three-point hitch may also be provided with a
trailer coupling 21 formed on thebracket 3. The trailer coupling shown in FIG. 6 is of the automatic type and is provided at a low point on thebracket 3 to allow maximum space for the other elements of the hitch and any attachments to be joined thereto. - The three-point hitch of the invention can be utilized effectively with attachments like plows which mainly are accommodated in the lower third of the lifting capacity of the hitch. The
lower links 5 can be synchronously raised and lowered by thecylinder units 10 and the transverse inclination of theattachment 2 can be adjusted by varying the positions of the two lower links. The transverse inclination can be held constant over the entire vertical stroke or only a portion thereof. Usually, however, the transverse inclination is a function of the terrain. Advantageously, the inclination both in the longitudinal and in the transverse direction can be adjusted automatically or manually, the longitudinal inclination being a function of the extension of theupper link 7. - Where the lateral stabilization as well as the transverse and longitudinal inclinations are to be automatically adjusted and/or the lateral stabilization is to be turned on independently of the stroke or for boundary plowing or the like in horticulture or viniculture, a control unit50 can be provided which operates the
hydraulic systems 51 supplying the cylinders. The pistons in that case maybe provided withdisplacement sensors 52, 53 and 54, for example, signalling the positions of the pistons to the control unit 50. The tendency of the three-point hitch to swing from side to side is a function of the soil parameters (heavier or lighter soil) and can be limited through hydraulic throttling of the hydraulic fluid of thecylinders 11. The control unit 50, however, is preferably an electronic controller which can be programmed for different modes of operation and can respond to the positions of the various pistons.
Claims (13)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10000846 | 2000-01-12 | ||
DE10000846A DE10000846A1 (en) | 2000-01-12 | 2000-01-12 | Three-point hitch for a tractor, tractor or the like |
DE10000846.1 | 2000-01-12 |
Publications (2)
Publication Number | Publication Date |
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US20010022226A1 true US20010022226A1 (en) | 2001-09-20 |
US6443236B2 US6443236B2 (en) | 2002-09-03 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/760,351 Expired - Fee Related US6443236B2 (en) | 2000-01-12 | 2001-01-11 | Three-point hitch for a tractor |
Country Status (5)
Country | Link |
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US (1) | US6443236B2 (en) |
EP (1) | EP1116430B1 (en) |
AT (1) | ATE337699T1 (en) |
DE (2) | DE10000846A1 (en) |
PL (1) | PL345013A1 (en) |
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CN114030332A (en) * | 2021-11-15 | 2022-02-11 | 日照海卓液压有限公司 | Four-shaft multi-attitude control suspension lifting device for large power platform |
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US7040644B1 (en) * | 2002-12-30 | 2006-05-09 | Adams Charles M | Hydraulic three point hitch |
US20050028992A1 (en) * | 2003-04-28 | 2005-02-10 | Potter Todd K. | Implement mounting fixture |
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US8382207B2 (en) | 2010-09-21 | 2013-02-26 | Mark Altemeier | Three point linkage systems |
US20130168113A1 (en) * | 2011-12-28 | 2013-07-04 | Agco Corporation | Multi-mode steerable 3-point hitch |
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- 2000-01-12 DE DE10000846A patent/DE10000846A1/en not_active Withdrawn
- 2000-12-02 DE DE50013392T patent/DE50013392D1/en not_active Expired - Lifetime
- 2000-12-02 EP EP00126385A patent/EP1116430B1/en not_active Expired - Lifetime
- 2000-12-02 AT AT00126385T patent/ATE337699T1/en not_active IP Right Cessation
-
2001
- 2001-01-10 PL PL01345013A patent/PL345013A1/en not_active IP Right Cessation
- 2001-01-11 US US09/760,351 patent/US6443236B2/en not_active Expired - Fee Related
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US20050208262A1 (en) * | 2002-05-01 | 2005-09-22 | Hendrik Nordhoff | Device for coupling two units to each other |
US7073603B2 (en) * | 2002-05-11 | 2006-07-11 | Deere & Company | Device for coupling two units to each other |
US20050098329A1 (en) * | 2003-11-11 | 2005-05-12 | Deere & Company, A Delaware Corporation | Control system for a three point implement hitch assembly |
US6971453B2 (en) * | 2003-11-11 | 2005-12-06 | Deere & Company | Control system for a three point implement hitch assembly |
WO2011050460A1 (en) * | 2009-10-27 | 2011-05-05 | Les Machineries Pronovost Inc. | Front lifting system, vehicle including such a system, kit for assembling same, and corresponding assembling and operating methods |
EP2353352A1 (en) * | 2010-01-28 | 2011-08-10 | Werner Miller | Universal transport trailer |
US8353359B2 (en) * | 2010-10-08 | 2013-01-15 | Amerequip Corporation | Apparatus and method for attaching a utility vehicle 3-point hitch to an implement bracket |
US20120138321A1 (en) * | 2010-12-03 | 2012-06-07 | Jerry Harris | Three-point front hitch mountable to the frame of an agricultural tractor |
US8555995B2 (en) * | 2010-12-03 | 2013-10-15 | Jerry Harris | Three-point front hitch mountable to the frame of an agricultural tractor |
US20120233892A1 (en) * | 2011-03-15 | 2012-09-20 | Steeve Dupont | Riser for a snow blowing attachment |
US8696024B2 (en) | 2011-12-08 | 2014-04-15 | La Compagnie Normand Ltee | Coupler for a vehicle and a vehicle comprising same |
USD748151S1 (en) * | 2013-08-01 | 2016-01-26 | Fontaine Heavy-Haul | Spreader bar |
ITUB20160494A1 (en) * | 2016-01-26 | 2017-07-26 | Cnh Ind Italia Spa | CONTROL LOGIC FOR LOWER ARMS AUTOMATIC STABILIZERS |
WO2017129622A1 (en) * | 2016-01-26 | 2017-08-03 | Cnh Industrial Italia S.P.A. | Control logic for automatic lower links stabilizers |
CN108021022A (en) * | 2018-01-31 | 2018-05-11 | 吉林省农业机械研究院 | A kind of rear-tractor three-link hitch and its control method |
CN114030332A (en) * | 2021-11-15 | 2022-02-11 | 日照海卓液压有限公司 | Four-shaft multi-attitude control suspension lifting device for large power platform |
CN114051783A (en) * | 2021-11-15 | 2022-02-18 | 日照海卓液压有限公司 | Five-axis full-attitude control suspension lifting device for large power platform |
Also Published As
Publication number | Publication date |
---|---|
DE50013392D1 (en) | 2006-10-12 |
ATE337699T1 (en) | 2006-09-15 |
EP1116430B1 (en) | 2006-08-30 |
DE10000846A1 (en) | 2001-07-19 |
US6443236B2 (en) | 2002-09-03 |
PL345013A1 (en) | 2001-07-16 |
EP1116430A1 (en) | 2001-07-18 |
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