CA1242995A - Power-pivoting linkage for attachments on a loader - Google Patents
Power-pivoting linkage for attachments on a loaderInfo
- Publication number
- CA1242995A CA1242995A CA000472987A CA472987A CA1242995A CA 1242995 A CA1242995 A CA 1242995A CA 000472987 A CA000472987 A CA 000472987A CA 472987 A CA472987 A CA 472987A CA 1242995 A CA1242995 A CA 1242995A
- Authority
- CA
- Canada
- Prior art keywords
- bucket
- loader
- pair
- linkage
- boom
- 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
Abstract
Abstract of the Disclosure A hydraulic linkage assembly is provided for pivotally connecting a loader bucket or the like to the forward ends of the boom arms of an end loader. The linkage comprises a pair of assemblies mounted on the forward ends of the boom arms, each of the assemblies comprising a first linkage pivotally connected at its lower end to the associated boom arm and extending upwardly therefrom. A second linkage is pivotally connected at its rearward end to the upper end of the first linkage and extends downwardly forwardly therefrom to a pivotal connection with the rearward end of the bucket. A hydraulic cylinder is pivotally connected to the boom arm, at its base end, forwardly of the first linkage and has its rod end pivotally connected to the pivotal connection of the first and second linkages.
Description
~2'~%9~
A POWER-PIVOTING _INKAGE FOR ATTACHMENTS ON A LOADER
Conventional end loaders such as tractor loaders ordinarily have a materials handling attachment such as a bucket pivotally mounted on the forward ends of a pair of booms.
The bucket is nor~ally pivoted with respect to the boom arms by means of a pair of hydraulic cylinders pivotally connected to the upper forward ends of the boom arms and the upper rearward portion of the bucket. The pivotal arrangement just described limits the degree to which the bucket may be dumped or tipped back. Further, severe strain is placed on the hydraulic cylinders when the bucket is moved to its dumped position and the bucket is used to scrape or "break loose" materials such as dirt, silage, etc.
A further limitation on the conventional tractor tractor loaders is that the cylinders controlling the pivotal movement of the attachments or buckets normally control the load in the bucket during the retraction stroke. The retraction stroke in cylinders in less powerful than the extension or push stroke due to loss of area of the cylinder ram.
Therefore, it is a principal object of the invention to provide`an improved means for pivoting a loader bucket or the like.
Still another object of the invention is to provide a hydraulic cylinder linkage for pivoting a loader bucket wherein the hydraulic cylinders are completely retracted when the bucket is in its extreme most dumped position thereby reducing strain on the cylinders.
Yet another object of the invention is to provide a hydraulic cylinder linkage for pivotally connecting a loader bucket to an end loader which permits the bucket to be moved ` ~2~
through a greater range of movement relative to the boom arms.
Still another object of the invention is to provide a means for hydraulically pivoting a loader bucket which is durable in use and refined in appearance.
Still another object of the invention is to provide a means for hydraulically pivoting a loader bucket wherein the push stroke of the hydraulic cylinders is used to control the load in the bucket.
These and other objects will be apparent to those skilled in the art.
This invention consists in the construction, arrangements and combination or the various parts of the device, whereby the objects contemplated are attained as hereinafter more fully set forth, specifically point`ed out in the claims, and illustrated in the accompanying drawings, in which:
Figure 1 is a side view of a tractor having the loader mounted thereon:
Figure 2 is a view similar to Figure 1 illustrating the various positions to which the loader and bucket may be moved:
Figure 3 is an end elevational view of the loader bucketO
Figure 4 is a rear elevational view of the loader bucket:
Figure 5 is a sectional view of the bucket:
Figure 6 is a partial rear perspective view of the loader bucket and the quick attach means.
Figure 7 is a side view illustrating the loader being mounted on the tractor with portions thereof cut away to fully illustrated the invention:
Figure 8 is a side elevational view illustrating the locking mechanism in its locl~ed position:
` 2~Z~S
Figure 9 is a view similar to Figure 7 except that the loader has been mounted on the tractor:
Figure lO is a perspective view of the supporting frame for the loader which is mounted on the tractor.
A means for hydraulically moving the hydraulic bucket on an end loader is described wherein the forward end of the boom arms of the loader are pivotally connected to the lower rearward side of the bucket. A pair of hydraulic linkage assemblies are provided on each of the boom arms. Each of the linkage assemblies comprises a first linkage pivotally connected at its lower end to the boom arm and extending upwardly therefrom. A
second linkage is pivotally connected to the upper end of the first linkage and extends downwardly and forwardly therefrom to a pivotal connection with the ~loader bucket. A hydraulic cylinder is pivotally connected to the boom arm, at its base end, forwardly of the first linkage and has its rod pivotally connected to the pivotal connection between the irst and second linkages. when the hydraulic cylinder is in its completely retracted position, the bucket is in its extreme most dumped 0 position and the majority of the forces on the hydraulic cylinder are "straight-line" forces parallel to the longitudinal axis of the hydraulic cylinder. Advantage is also taken of the power stroke of the bucket cylinders to control the loaded bucket.
The numeral 10 refers to a four-wheel tractor of the articulated type comprising a front articulated section 12 and a rear articulated section 14. Tractor lO is provided with a pair of rear wheels 16 and a pair of front wheels 18.
Figure 10 illustra-tes a supporting frame and which is referred to by the reference numeral 20. Supporting frame 20 ` ~ S
forms a portion of the loader 22 and is designed to support the loader 22 on the tractor.
Supporting frame 20 comprises a center frame portion 24 which is bolted to the underside and sides of the front articulated portion 12. Side supporting frames 26 and 26' are bolted to opposite sides of the tractor and are mirror images of each other. Inasmuch as side supporting frames 26 and 26' are identical, only side supporting frame 26 will be described in detail.
The numeral 28 refers to a connector element or pocket which is secured to the exterior surface of the rearward end o the frame 26. Pocket 28 includes an upper wall 30, outer 32, and lower wall 34. As seen in the drawings, the forward and rearward ends of the pocket 2~ are open and that the rearward end of bottom wall 34 is spaced forwardly of the rearward end of top wall 30~ Frame 24 is secur~d to frames 26 and 26' by brackets 36 and 36' respectively.
A rectangular block 3B is secured to the for~ard end of frame 26 by welding or the like and extends outwardly therefrom as illustrated in Figure 10. For purposes of description, block 38 will be described as having a forward end 40, rearward end 42, top portion 44 and bottom portion 460 As seen in Figure 10, bracket 48 extends laterally ou~wardly from the lower end of frame 26 below block 38.
Loader 22 includes a substantially U-shaped :~rame means 50 which is adapted to be removably secured to the supporting frame 20 on the tractor 10. Frame means 50 includes a front frame 52 having a pair of side frames 54 and 56 (not shown) extending upwardly and rearwardly from the opposite lower sides - thereof. Side frame 56 is identical to side frame 54. Frame z~
member is secured to and extends downwardly from the rearward end of side frame 54 and includes a rearwardly extending portion 60 as best illustra~ed in Figure 9. Finger 62 extends downwardly from the lower rearward end of rearwardly extending portion 60. Frame member 64 is secured to and extends between frame members 54 and 58 as seen in Figure 9 for strengthening purposes.
A pair of locking or connector 66 and 66' (not shown) are secured to the inside surfaces of front frame 52 at opposite sides thereof. Pipe or 'shaft 86 extends hori20ntally between the opposite sides of front frame 52 at the lower end thereof and is designed to engage the underside of the brackets 48 and 48' as will be described in more detail hereinafter.
Each of the locking elements 66 comprises a rectangular channel member 70 having a locking lever 7~ pivotally mounted thereon at 74. A spring-loaded pin 76 is vertically moveably received in the rearward end of the channel 70 and has a hollow channel member 78 mounted at the upper end thereof. As seen in Figure 8 of the drawings, the rearward end of lever 72 is received within the forward end of the channel member 78 and is designed to raise the pln or plunger 76 at times so that the lower end thereof does not protude below the lower end of channel 70. A small lip 80 is provided in the upper interior of channel member 78 which is adapted to yieldably engage the rearward end of lever 72 to provide a means for maintaining the pin 76 in the unlocked position of Figure 7. When the forward end of lever 7,2 is moved upwardly, the plunger or pin 76 moves downwardly from the lower end of channel member 70.
` ~iL2~
A pair o~ boom arms 82 and 82' are pivotally connected at their upper rearward ends to the frame members 54 and 56 respectively. A hydraulic cylinder 84 is secured at its base end to the outer end of pipe 86 and extends upwardly therefrom.
Likewise, a cylinder 84' (not shown) extends between frame member 56 and boom arm 82'. The rod 88 oE cylinder 84 is connected to the boom arm 82 at 90. As seen in Figure 6, quick-attach assemblies 92 and 92' are pivotally secured to the forward ends of boom arms 82 and 82' respectively. Inasmuch as assemblies 92 and 92' are identical, only assembly 92 will be described in detail.
Assembly 92 comprises an arcuate bracket 94 pivotally connected to the forward end of boom arm 82 by means of pin 96.
An enlongated pipe 98 is secured to the upper end of bra~ket 94 and an elongated pipe 100 is secured to the lower end of bracket 94. Plates 102 and 104 are pivotally connected to opposite sides of bracket 94 for engagement with the lugs 106 and 108 respectively as will be described hereinafter.
As seen in Figure 6, a pair of arms or links 110 and 112 are pivotally connected to bracket 94 by pin 114 and e~tend rearwardly therefrom. Arms or links 116 and 118 are pivotally connected to the rearward ends of arms 110 and 112 by means of pin 120. The lower ends of arms 116 and 118 are pivotally connected to the boom arm 82 by pin 122. ~ydraulic cylinder 124 is pivotally connected at its base end to the boom arm 82 by pin 126 and has its rod end connected to the pin 120.
The numeral 128 refers to a materials-handling bucket including a bottom wall 130, back wall 132, and opposite side walls 134 and 136. If desired, bottom wall 130 and back wall -- 132 may be integrally formed. ~s seen in the drawings, back ` ~2'.~ S
wall 132 includes a lower end portion 138 which extends upwardly and rearwardly from the rearward end of bottom wall 130 and an upper end portion 140 which extends upwardly and forwardly from the upper end of lower end portion 138. Rub bars 1~2 are secured to the underside of bottom wall 130 as seen in Figure 6.
A hollow tube 144 is secured to the upper end of back wall 132 and extends between the side walls 134 and 136. The strength of the bucket is achieved by means of the curved tubular ribs or members 146 which are welded to the rearward side of back wall 132. The upper ends of the tubular members 146 are welded to the underside of tube 144. The lower ends of the tubes 146 are also welded to an angle member 148. As seen in the drawings, the lugs 106 and 108 are secured to the tubes 146 rearwardly o~
the exterior surface of back wall 132. As best seen in Fi~ure 6, bars 150 are secured to and extend between adjacent pairs of the tubes 1~6.
In operation, the bucket 128 is raised and lowered relative to the ground by means of the boom arms 82 and 82'.
The bucket 128 is pivotally moved with respect to the boom arms 82 and 82' by means of the hydraulic cylinders 124. Extension of the rods and cylinders 124 causes the bucket to be tipped back while retraction of the rods and the cylinders 124 causes the bucket to be moved to its dumped position. when the bucket is in its extreme dumped position as illustrated in Figure 2, it can be seen that substantially "straight-line" forces- are posed on the cylinder thereby reducing the strain which is normally placed on the cylinders and rods of the hydraulic cylinders normally used to pivot the buckets. ~Ihen the bucket i5 in the extreme dumped position, the bucket may be used to scrape or - "break out" materials without fear that the hydraulic cylinders ` ~29~;29~31S
124 will be damaged. A further advantage in the pivotal and linkage arrangement disclosed herein is that the bucket may be dumped and tipped-back to greater degrees than is possible with conventional pivotal arrangements.
It can also be seen that the tilting back of the bucket is controlled by the cylinders 124 as the rods are being extended therefrom. The extension or push stroke of the cylinder is the most powerful stroke and that stroke is used to control the load in the bucket. Advantage is therefore taken o the power stroke of the bucket to control the loaded bucket.
Thus it can be seen that the invention accomplishes at least all of its stated objectives.
A POWER-PIVOTING _INKAGE FOR ATTACHMENTS ON A LOADER
Conventional end loaders such as tractor loaders ordinarily have a materials handling attachment such as a bucket pivotally mounted on the forward ends of a pair of booms.
The bucket is nor~ally pivoted with respect to the boom arms by means of a pair of hydraulic cylinders pivotally connected to the upper forward ends of the boom arms and the upper rearward portion of the bucket. The pivotal arrangement just described limits the degree to which the bucket may be dumped or tipped back. Further, severe strain is placed on the hydraulic cylinders when the bucket is moved to its dumped position and the bucket is used to scrape or "break loose" materials such as dirt, silage, etc.
A further limitation on the conventional tractor tractor loaders is that the cylinders controlling the pivotal movement of the attachments or buckets normally control the load in the bucket during the retraction stroke. The retraction stroke in cylinders in less powerful than the extension or push stroke due to loss of area of the cylinder ram.
Therefore, it is a principal object of the invention to provide`an improved means for pivoting a loader bucket or the like.
Still another object of the invention is to provide a hydraulic cylinder linkage for pivoting a loader bucket wherein the hydraulic cylinders are completely retracted when the bucket is in its extreme most dumped position thereby reducing strain on the cylinders.
Yet another object of the invention is to provide a hydraulic cylinder linkage for pivotally connecting a loader bucket to an end loader which permits the bucket to be moved ` ~2~
through a greater range of movement relative to the boom arms.
Still another object of the invention is to provide a means for hydraulically pivoting a loader bucket which is durable in use and refined in appearance.
Still another object of the invention is to provide a means for hydraulically pivoting a loader bucket wherein the push stroke of the hydraulic cylinders is used to control the load in the bucket.
These and other objects will be apparent to those skilled in the art.
This invention consists in the construction, arrangements and combination or the various parts of the device, whereby the objects contemplated are attained as hereinafter more fully set forth, specifically point`ed out in the claims, and illustrated in the accompanying drawings, in which:
Figure 1 is a side view of a tractor having the loader mounted thereon:
Figure 2 is a view similar to Figure 1 illustrating the various positions to which the loader and bucket may be moved:
Figure 3 is an end elevational view of the loader bucketO
Figure 4 is a rear elevational view of the loader bucket:
Figure 5 is a sectional view of the bucket:
Figure 6 is a partial rear perspective view of the loader bucket and the quick attach means.
Figure 7 is a side view illustrating the loader being mounted on the tractor with portions thereof cut away to fully illustrated the invention:
Figure 8 is a side elevational view illustrating the locking mechanism in its locl~ed position:
` 2~Z~S
Figure 9 is a view similar to Figure 7 except that the loader has been mounted on the tractor:
Figure lO is a perspective view of the supporting frame for the loader which is mounted on the tractor.
A means for hydraulically moving the hydraulic bucket on an end loader is described wherein the forward end of the boom arms of the loader are pivotally connected to the lower rearward side of the bucket. A pair of hydraulic linkage assemblies are provided on each of the boom arms. Each of the linkage assemblies comprises a first linkage pivotally connected at its lower end to the boom arm and extending upwardly therefrom. A
second linkage is pivotally connected to the upper end of the first linkage and extends downwardly and forwardly therefrom to a pivotal connection with the ~loader bucket. A hydraulic cylinder is pivotally connected to the boom arm, at its base end, forwardly of the first linkage and has its rod pivotally connected to the pivotal connection between the irst and second linkages. when the hydraulic cylinder is in its completely retracted position, the bucket is in its extreme most dumped 0 position and the majority of the forces on the hydraulic cylinder are "straight-line" forces parallel to the longitudinal axis of the hydraulic cylinder. Advantage is also taken of the power stroke of the bucket cylinders to control the loaded bucket.
The numeral 10 refers to a four-wheel tractor of the articulated type comprising a front articulated section 12 and a rear articulated section 14. Tractor lO is provided with a pair of rear wheels 16 and a pair of front wheels 18.
Figure 10 illustra-tes a supporting frame and which is referred to by the reference numeral 20. Supporting frame 20 ` ~ S
forms a portion of the loader 22 and is designed to support the loader 22 on the tractor.
Supporting frame 20 comprises a center frame portion 24 which is bolted to the underside and sides of the front articulated portion 12. Side supporting frames 26 and 26' are bolted to opposite sides of the tractor and are mirror images of each other. Inasmuch as side supporting frames 26 and 26' are identical, only side supporting frame 26 will be described in detail.
The numeral 28 refers to a connector element or pocket which is secured to the exterior surface of the rearward end o the frame 26. Pocket 28 includes an upper wall 30, outer 32, and lower wall 34. As seen in the drawings, the forward and rearward ends of the pocket 2~ are open and that the rearward end of bottom wall 34 is spaced forwardly of the rearward end of top wall 30~ Frame 24 is secur~d to frames 26 and 26' by brackets 36 and 36' respectively.
A rectangular block 3B is secured to the for~ard end of frame 26 by welding or the like and extends outwardly therefrom as illustrated in Figure 10. For purposes of description, block 38 will be described as having a forward end 40, rearward end 42, top portion 44 and bottom portion 460 As seen in Figure 10, bracket 48 extends laterally ou~wardly from the lower end of frame 26 below block 38.
Loader 22 includes a substantially U-shaped :~rame means 50 which is adapted to be removably secured to the supporting frame 20 on the tractor 10. Frame means 50 includes a front frame 52 having a pair of side frames 54 and 56 (not shown) extending upwardly and rearwardly from the opposite lower sides - thereof. Side frame 56 is identical to side frame 54. Frame z~
member is secured to and extends downwardly from the rearward end of side frame 54 and includes a rearwardly extending portion 60 as best illustra~ed in Figure 9. Finger 62 extends downwardly from the lower rearward end of rearwardly extending portion 60. Frame member 64 is secured to and extends between frame members 54 and 58 as seen in Figure 9 for strengthening purposes.
A pair of locking or connector 66 and 66' (not shown) are secured to the inside surfaces of front frame 52 at opposite sides thereof. Pipe or 'shaft 86 extends hori20ntally between the opposite sides of front frame 52 at the lower end thereof and is designed to engage the underside of the brackets 48 and 48' as will be described in more detail hereinafter.
Each of the locking elements 66 comprises a rectangular channel member 70 having a locking lever 7~ pivotally mounted thereon at 74. A spring-loaded pin 76 is vertically moveably received in the rearward end of the channel 70 and has a hollow channel member 78 mounted at the upper end thereof. As seen in Figure 8 of the drawings, the rearward end of lever 72 is received within the forward end of the channel member 78 and is designed to raise the pln or plunger 76 at times so that the lower end thereof does not protude below the lower end of channel 70. A small lip 80 is provided in the upper interior of channel member 78 which is adapted to yieldably engage the rearward end of lever 72 to provide a means for maintaining the pin 76 in the unlocked position of Figure 7. When the forward end of lever 7,2 is moved upwardly, the plunger or pin 76 moves downwardly from the lower end of channel member 70.
` ~iL2~
A pair o~ boom arms 82 and 82' are pivotally connected at their upper rearward ends to the frame members 54 and 56 respectively. A hydraulic cylinder 84 is secured at its base end to the outer end of pipe 86 and extends upwardly therefrom.
Likewise, a cylinder 84' (not shown) extends between frame member 56 and boom arm 82'. The rod 88 oE cylinder 84 is connected to the boom arm 82 at 90. As seen in Figure 6, quick-attach assemblies 92 and 92' are pivotally secured to the forward ends of boom arms 82 and 82' respectively. Inasmuch as assemblies 92 and 92' are identical, only assembly 92 will be described in detail.
Assembly 92 comprises an arcuate bracket 94 pivotally connected to the forward end of boom arm 82 by means of pin 96.
An enlongated pipe 98 is secured to the upper end of bra~ket 94 and an elongated pipe 100 is secured to the lower end of bracket 94. Plates 102 and 104 are pivotally connected to opposite sides of bracket 94 for engagement with the lugs 106 and 108 respectively as will be described hereinafter.
As seen in Figure 6, a pair of arms or links 110 and 112 are pivotally connected to bracket 94 by pin 114 and e~tend rearwardly therefrom. Arms or links 116 and 118 are pivotally connected to the rearward ends of arms 110 and 112 by means of pin 120. The lower ends of arms 116 and 118 are pivotally connected to the boom arm 82 by pin 122. ~ydraulic cylinder 124 is pivotally connected at its base end to the boom arm 82 by pin 126 and has its rod end connected to the pin 120.
The numeral 128 refers to a materials-handling bucket including a bottom wall 130, back wall 132, and opposite side walls 134 and 136. If desired, bottom wall 130 and back wall -- 132 may be integrally formed. ~s seen in the drawings, back ` ~2'.~ S
wall 132 includes a lower end portion 138 which extends upwardly and rearwardly from the rearward end of bottom wall 130 and an upper end portion 140 which extends upwardly and forwardly from the upper end of lower end portion 138. Rub bars 1~2 are secured to the underside of bottom wall 130 as seen in Figure 6.
A hollow tube 144 is secured to the upper end of back wall 132 and extends between the side walls 134 and 136. The strength of the bucket is achieved by means of the curved tubular ribs or members 146 which are welded to the rearward side of back wall 132. The upper ends of the tubular members 146 are welded to the underside of tube 144. The lower ends of the tubes 146 are also welded to an angle member 148. As seen in the drawings, the lugs 106 and 108 are secured to the tubes 146 rearwardly o~
the exterior surface of back wall 132. As best seen in Fi~ure 6, bars 150 are secured to and extend between adjacent pairs of the tubes 1~6.
In operation, the bucket 128 is raised and lowered relative to the ground by means of the boom arms 82 and 82'.
The bucket 128 is pivotally moved with respect to the boom arms 82 and 82' by means of the hydraulic cylinders 124. Extension of the rods and cylinders 124 causes the bucket to be tipped back while retraction of the rods and the cylinders 124 causes the bucket to be moved to its dumped position. when the bucket is in its extreme dumped position as illustrated in Figure 2, it can be seen that substantially "straight-line" forces- are posed on the cylinder thereby reducing the strain which is normally placed on the cylinders and rods of the hydraulic cylinders normally used to pivot the buckets. ~Ihen the bucket i5 in the extreme dumped position, the bucket may be used to scrape or - "break out" materials without fear that the hydraulic cylinders ` ~29~;29~31S
124 will be damaged. A further advantage in the pivotal and linkage arrangement disclosed herein is that the bucket may be dumped and tipped-back to greater degrees than is possible with conventional pivotal arrangements.
It can also be seen that the tilting back of the bucket is controlled by the cylinders 124 as the rods are being extended therefrom. The extension or push stroke of the cylinder is the most powerful stroke and that stroke is used to control the load in the bucket. Advantage is therefore taken o the power stroke of the bucket to control the loaded bucket.
Thus it can be seen that the invention accomplishes at least all of its stated objectives.
Claims
The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
1.
A tractor loader, comprising a frame means adapted to be secured to the tractor, a pair of spaced-apart boom arms, having rearward and forward ends, secured at their rearward ends to the frame means, means for raising and lowering said boom arms relative to said frame means, a loader bucket pivotally secured to the forward ends of said boom arms and being movable between a dumping position and a tipped back position, first and second linkage means interconnecting said first and second boom arms to said loader bucket, each of said first and second linkage means comprising a first pair of horizontally spaced, elongated link members pivotally secured at one end thereof to the associated boom arm, rearwardly of the forward end thereof, and extending upwardly therefrom, a second pair of horizontally spaced, elongated link members pivotally secured at one end thereof to the other ends of said first pair of link members, said second pair of link members being pivotally secured at their other ends to said loader bucket above the pivotal connection between said boom arm and said loader bucket, a hydraulic cylinder pivotally connected at one end thereof to said boom arm forwardly of the connection between said first pair of link members and said boom arms, said hydraulic cylinder being pivotally connected at its other end to the pivotal connection between said first and second pair of link members, said hydraulic cylinder being completely retracted when said loader bucket is in its said dumping position.
1.
A tractor loader, comprising a frame means adapted to be secured to the tractor, a pair of spaced-apart boom arms, having rearward and forward ends, secured at their rearward ends to the frame means, means for raising and lowering said boom arms relative to said frame means, a loader bucket pivotally secured to the forward ends of said boom arms and being movable between a dumping position and a tipped back position, first and second linkage means interconnecting said first and second boom arms to said loader bucket, each of said first and second linkage means comprising a first pair of horizontally spaced, elongated link members pivotally secured at one end thereof to the associated boom arm, rearwardly of the forward end thereof, and extending upwardly therefrom, a second pair of horizontally spaced, elongated link members pivotally secured at one end thereof to the other ends of said first pair of link members, said second pair of link members being pivotally secured at their other ends to said loader bucket above the pivotal connection between said boom arm and said loader bucket, a hydraulic cylinder pivotally connected at one end thereof to said boom arm forwardly of the connection between said first pair of link members and said boom arms, said hydraulic cylinder being pivotally connected at its other end to the pivotal connection between said first and second pair of link members, said hydraulic cylinder being completely retracted when said loader bucket is in its said dumping position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000472987A CA1242995A (en) | 1985-01-28 | 1985-01-28 | Power-pivoting linkage for attachments on a loader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000472987A CA1242995A (en) | 1985-01-28 | 1985-01-28 | Power-pivoting linkage for attachments on a loader |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1242995A true CA1242995A (en) | 1988-10-11 |
Family
ID=4129692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000472987A Expired CA1242995A (en) | 1985-01-28 | 1985-01-28 | Power-pivoting linkage for attachments on a loader |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1242995A (en) |
-
1985
- 1985-01-28 CA CA000472987A patent/CA1242995A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |