CA1127205A - Excavating buckets - Google Patents
Excavating bucketsInfo
- Publication number
- CA1127205A CA1127205A CA372,528A CA372528A CA1127205A CA 1127205 A CA1127205 A CA 1127205A CA 372528 A CA372528 A CA 372528A CA 1127205 A CA1127205 A CA 1127205A
- Authority
- CA
- Canada
- Prior art keywords
- bucket
- rippers
- edge
- ripper
- attached
- 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
- 230000000875 corresponding effect Effects 0.000 claims 2
- 230000006872 improvement Effects 0.000 claims 1
- 239000000758 substrate Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 241000022563 Rema Species 0.000 description 1
- 206010062544 Tooth fracture Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
- E02F9/2808—Teeth
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/40—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
- E02F9/2808—Teeth
- E02F9/2816—Mountings therefor
- E02F9/2833—Retaining means, e.g. pins
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Shovels (AREA)
- Component Parts Of Construction Machinery (AREA)
- Earth Drilling (AREA)
- Meat, Egg Or Seafood Products (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
An excavating device having a plurality of gouging members protruding downwardly from the bottom of an excavating bucket, and extending therefrom in the direction toward the bucket's scooping edge, the members being staggered at varying distances from the edge and bucket sides.
An excavating device having a plurality of gouging members protruding downwardly from the bottom of an excavating bucket, and extending therefrom in the direction toward the bucket's scooping edge, the members being staggered at varying distances from the edge and bucket sides.
Description
VS
Background of the invention This invention relates to excavating buckets.
Excavating buckets, such as those used on apparatus commonly known as a backhoe, are usual]y pivotall~ attached to a movable dipperstick, with separate actuators arranged to power bucket pivoting and clipperstick movements, respectively. Such buckets often have teeth-like protrusions along a leading edge which loosen ancl scoop material as the bucket moves through the substrate to be excavated; and may also include a row of ripper teeth attached to the rear of the bucket (i.e., on the side opposite the leading edge) generally 10 parallel to the leading edge and perpendicular to the direction of the motion of the bucket for dislodging and breaking up tightly compacted substrate. Such ripper teeth are usually arranged to operate with the bucket actuator fixed in a fully extended position, and the ripping motion is powered by the dipperstick actuator.
Such ripper teeth have not been entirely satisfactory. They often penetrate too deeply and tend to "stall out" the dipperstick cylinder. Addi-tionally, the material loosened has a tendency to jam the motion of the bucket and cause it to ride over the material and thus reduce ripping penetration; and efficiency of operation is hindered by the need constantly to reposition the bucket to maintain the proper ripper tooth cutting angle.
Summary of the Invention I have discovered that, by providing a plurality of rippers which protrude downwardly from the bottom ~either V-shaped or flat) of an excavating bucket and face towards its front edge, the rippers being staggered from the front edge to the back of the bucket at varying distances from the bucket sides, powered movement of the bucket through a substrate will dislodge pieces.
The rippers can be permanently fixed to the bucket bottom or can be part of an ii!
' ' ~ '.
:i `~ , ,. ` ' ' . ' ', ' " ' ' ' ~
.27~2~5 adapter which itself may be attached to a bwckct.
In preferred embodiments the rippers are not aligned with each other either transversely or longitudinally of the bucket, but are spaced front to rear in a V-pattern. The forward edges of the rippers may all lie on a constant radius measured from the axis of pivotal connection of the bucket to the dipperstick ~or, as may sometimes be preferred or from a point above or below the axis of pivotal connector~, or may lie on an elliptical arc tailing in towards or away from the bucket bottom. The lead ripper may be positioned either on or behind the bucket front edge; the ripper pattern may be such that each ripper fractures material into the grooves cut by the preceding ripper;
it is preferred that all rippers be designed to maintain the optimum cutting angle ~generally 35-55 and, preferably, 45); and, conveniently for any ripper the clearance between its teeth and the bottom of bucket is greater than in the case of the rippers forward of it.
The following is a description by way of example of certain embodi-ments of the present invention reference being had to the accompanying drawings in which:_ Figure 1 is a side elevation of the bucket, partly broken away.
Figure 2 is a ~ottom view of the bucket of Figure 1.
Figure 3 is a side elevation of a bucket and attachment therefore, showing another embodiment.
F~gures 4 and 5 are detailed views of a ripper used in either of the embodiments of Figure 1 or Figure 3.
Figure 6 is a side elevation of the bucket of Figure 1, showing ~ariations in ripper radtus.
Figure 7 is a s~de elevation of a Y-bottom bucket.
~igures 8~ and 8~ are schematics ~showing ripper placement.
: ~ , ~ ................ ,- . ~ . :. .
.. , . .. .. ~ . ,, : ~ ~ :, : : :: :
~.~2'~
St~ucture As sho~n in F~gures 1 and 2, backhoe Bucket 30 ~s attached to d~pperstick 22 with h~nge pin 32 and to link member 24 with hinge pin 34.
P~ston rod 26 connects hydraulic actuator 28 to l~nk member 24, and l~nk S0 connects member 24 and dipperstick 22. Lead~ng or scooping edge 36 of bucket 30 hasfive forwardl~ disposed teeth 38, extending froM ~orward-pointing, "V" - shaped cutting plate 40.
Bucket 30 has curved bottom plate 42, connecting two side walls 45 and 49 and forming both the bottom 44 and back 45 of the bucket, and a top plate 48. Seven rippers 52 are attached to bottom plate 42, staggered at regular intervals from bucket scooping edge 36 to the rear of plate 42. The forward six of ripper 52 are arranged in a V-con~iguration, with the center one of teeth 38 on edge 36 forming the apex of the V, and the rippers 52 at the rear of the V close to the bucket sides. The rear most ripper 52 is not part of the V, but is aligned with center tooth 38. As sho~n in Figure 2, no two rippers 52 are aligned with each other, either from side-to-side or from ~ront to back of bucket 30. Also, as shown in Figure 1, the clearance between each ripper 52 and the bottom 44 of the bucket progressively increases from ront to rear of the bucket.
Referring now to Figures 4 and 5, each ripper 52 includes a shank 56 fixed to the bucket bottom 44, and a ripper tooth 54 fitted over the end of the shank and held in place by a pin 60~
Each tooth 54 ~ncludes relati~el~ ~nclined upp&r and lower surfaces, 62, 64 respectively, which set in a point 66 at the front of ~he tooth. The polnts 66 of all of rippers 52 are equidistant ~rom the hinge pin 32 about which bucket 30 rotates relative to dlpperst~ck 22, as illustrated by arc A of rad~us R. As shown, the center one 9f teet~ 38 also lies on arc A. The upper ., ~Z7Z~
sur$ace 62 o~ each tooth 54 de~nes~ the tooth cutt~ng angle,~ which, for each of r~ppers~ 52, is between about 35 and 55~ and, pre~erably, 45. The lower surface 64 is pos~tioned so that ~t will not bottom-out ln the trench cut by the tooth as the bucket is pi~oted abou-t h~nge pin 32. The progressively greater clearance ~-~ront to rear~ between the r~pper and bucket bottom 42 is provided b~, as shown, a progressive increase in the length of shanks 56.
P~gure 3 shows an alternative embodiment in wh~ch plate 47' is welded or bolted to the bottom digging surface 44~ of bucket 30'. Rippers 52' are attached to plate 47' and are ident~cal to the rippers 52 of bucket 30. Depending on the curvature of suiface 44' of a particular bucket, the arc corresponding to A may not necessarily have a constant radius; however, the arrangement of progressively longer shanks and staggering of teeth with respect to edge 36 and the bucket sidewalls remains the same.
Figure 6 illustrates the effect of mounting rippers 52 on a constant radius measured from a point that is above ~Pl) or below (P2), rather than coincident with, hinge pin 32. As shown, mounting ~he rippers on a constant radius Rl, measured from Pl causes the arc Al, on which the teeth 541~ lie to ta~l in towards the bucket bottom 46 so that, as bucket 30 is rolled about hinge pin 32, the rippers pull away from the ground. With rippers so mounted, an operator would drop boom 22 as the bucket is rolled to maintain contact be-tween the rippers and the ground.
Similarly, mounting the rippers on a constant radius R2 measured from P2 causes the arc A2 on which teeth 542 lie to tail away from the bucket bottom 44, and the rippers will engage the ground more aggressively as bucket 30 is rolled about hinge pin 32.
Figure 7 shows a bucket 30" having a V-shaped bottom 44". Rippers 52" are attached to bottom 44" and are identical to the rippers 52 of bucket 30.
, : . ~ : :~ ~:: :
Viewed from the side, the arc A3 on ~h~ch th~ points 54" o~ rlppers 52" lie elliptical and, like arc Al of ~gure 6, tails ~n towards the bucket bottom.
If desired, the rippers may also be positioned so that teeth 54" lie on an elllptical arc A4 which, like ar A2 of ~igure 6, tails away ~rom the bucket bottom. Such elliptical arcs may be provided on either V-bottom buckets ~as shown) or on flat-bottom buckets swch as those shown in Figures 1 and 6.
Re~erring now to Figures 2 and 8-B, the center tooth 38 and rippers 52a-52f ~orming the "V" configuration earlier referred to are of such width and are so placed that, as bucket 30 is rolled, successive teeth fracture substrate into the groove cut by preceding teeth and leave a cut having flat continuous bottom.
Teeth such as those provided on the V-bottom bucket of Figure 7 may similarly be mounted, as shown in Figure 8-A, 50 that each trailing tooth fractures substrate into the groove cut by a preceding tooth and the teeth forming the "V" configuration ~as shown the center laading edge tooth 38" and six following rippers 52") make cuts extending substantially continuously the ~`
bucket width.
`~E~ on Actuator 28 ~the bucket cylinder) pivots the bucket about hinge pin 32 Cthe bucket's axis of attachment to dipperstick 22) causing the bucket to scoop loose substrate with the scooping edge and teeth and to rip compact su~strate with the rippers 52. It is also possible to rip by moving dlpper-stick 22, but much greater force is generally available from extending the bucket cylinder.
Because rippers 52 are not transversely aligned, they sequentially engage the substrate, permitting each tooth to pro~ide the maximum digging force.
The side-to-side staggering of the rippers inhibits rocks, frozen earth, etc.
... . , . . , ~ .:
, ,. ~ . , ~ ~ 2 7 f~ S
from ae~ng trapped between adjacent teeth, and t~e progressively increasing clearance bet~een the rippers and the ~ucket Bottom provides room for material loosened b~ forward tecth to pass between more rearward teeth and the bucket bottom without forc~ng the bucket up off the substrate which would disengage the more rearward teeth. The pre~erred "~" con~iguration ~front-to-rear) ripper pattern allo~s a trailing tooth to fracture the substrate into the groove already cut by a preceding tooth. As shown ~n ~igures 2, 7 and 8-A
and 8-B, the center lead tooth 38, 38" in the "V" makes the initlal cut, ripper 52a, 52"a fractures material from one side into the groove cut by tooth 38, 38", ripper 52b~ 52"b~ fractures material ~rom the other side into the groove cut by tooth 38, 38" ripper 52c, 52"c fractures material from the first side into the groove cut by tooth 52a, 521'a and so forth. The width and placement of the center tooth 38 and the rippers 52 are such that, as shown In ~igures 8-A and 8-B, the successi~e grooves they cut will essentially abut and spcm the entire bucket width. As the bucket 30 is pivoted about hinge pin 32, each tooth cuts at the optim~ cutting angle, without requiring adjustment or change in the pos~tion of the dipperstick.
The sequential ripping of teeth 54 is at controlled depths, and since all teeth are on a constant radius from the pivot point, the flat bottom buckets of Figures 1, 2 and 6 cut a flat-bottom trench automatically.
Other Embodiments In other embodiments the rippers can be arranged in staggered patterns, i.e., patterns in ~hich they do not align transversely or longitudin-ally, other than the front-to-rear "V"; the rippers may be bolted in place;
the front edge of the bucket can be straight rather than "V" shaped; the teeth on the front edge can have other configurations such as flat or bifuracted;
or, the front edge may be straight cutting edge and the leading ripper may lie .. . .. .. .
Z'7~5 be~xnd the ~ront edge and be mounted on -the bucket bo~tom.
~ n st~ urther em~od~ments, as noted w~th respect to -~gures 3, khe radius on which the teeth are mounted ma~ increase or decr~ase from ~ront to rear o~ the bucket rather than rema~n~ng constant.
These and other embodimen~ will be withln the scope of the ollow~ng claims.
Background of the invention This invention relates to excavating buckets.
Excavating buckets, such as those used on apparatus commonly known as a backhoe, are usual]y pivotall~ attached to a movable dipperstick, with separate actuators arranged to power bucket pivoting and clipperstick movements, respectively. Such buckets often have teeth-like protrusions along a leading edge which loosen ancl scoop material as the bucket moves through the substrate to be excavated; and may also include a row of ripper teeth attached to the rear of the bucket (i.e., on the side opposite the leading edge) generally 10 parallel to the leading edge and perpendicular to the direction of the motion of the bucket for dislodging and breaking up tightly compacted substrate. Such ripper teeth are usually arranged to operate with the bucket actuator fixed in a fully extended position, and the ripping motion is powered by the dipperstick actuator.
Such ripper teeth have not been entirely satisfactory. They often penetrate too deeply and tend to "stall out" the dipperstick cylinder. Addi-tionally, the material loosened has a tendency to jam the motion of the bucket and cause it to ride over the material and thus reduce ripping penetration; and efficiency of operation is hindered by the need constantly to reposition the bucket to maintain the proper ripper tooth cutting angle.
Summary of the Invention I have discovered that, by providing a plurality of rippers which protrude downwardly from the bottom ~either V-shaped or flat) of an excavating bucket and face towards its front edge, the rippers being staggered from the front edge to the back of the bucket at varying distances from the bucket sides, powered movement of the bucket through a substrate will dislodge pieces.
The rippers can be permanently fixed to the bucket bottom or can be part of an ii!
' ' ~ '.
:i `~ , ,. ` ' ' . ' ', ' " ' ' ' ~
.27~2~5 adapter which itself may be attached to a bwckct.
In preferred embodiments the rippers are not aligned with each other either transversely or longitudinally of the bucket, but are spaced front to rear in a V-pattern. The forward edges of the rippers may all lie on a constant radius measured from the axis of pivotal connection of the bucket to the dipperstick ~or, as may sometimes be preferred or from a point above or below the axis of pivotal connector~, or may lie on an elliptical arc tailing in towards or away from the bucket bottom. The lead ripper may be positioned either on or behind the bucket front edge; the ripper pattern may be such that each ripper fractures material into the grooves cut by the preceding ripper;
it is preferred that all rippers be designed to maintain the optimum cutting angle ~generally 35-55 and, preferably, 45); and, conveniently for any ripper the clearance between its teeth and the bottom of bucket is greater than in the case of the rippers forward of it.
The following is a description by way of example of certain embodi-ments of the present invention reference being had to the accompanying drawings in which:_ Figure 1 is a side elevation of the bucket, partly broken away.
Figure 2 is a ~ottom view of the bucket of Figure 1.
Figure 3 is a side elevation of a bucket and attachment therefore, showing another embodiment.
F~gures 4 and 5 are detailed views of a ripper used in either of the embodiments of Figure 1 or Figure 3.
Figure 6 is a side elevation of the bucket of Figure 1, showing ~ariations in ripper radtus.
Figure 7 is a s~de elevation of a Y-bottom bucket.
~igures 8~ and 8~ are schematics ~showing ripper placement.
: ~ , ~ ................ ,- . ~ . :. .
.. , . .. .. ~ . ,, : ~ ~ :, : : :: :
~.~2'~
St~ucture As sho~n in F~gures 1 and 2, backhoe Bucket 30 ~s attached to d~pperstick 22 with h~nge pin 32 and to link member 24 with hinge pin 34.
P~ston rod 26 connects hydraulic actuator 28 to l~nk member 24, and l~nk S0 connects member 24 and dipperstick 22. Lead~ng or scooping edge 36 of bucket 30 hasfive forwardl~ disposed teeth 38, extending froM ~orward-pointing, "V" - shaped cutting plate 40.
Bucket 30 has curved bottom plate 42, connecting two side walls 45 and 49 and forming both the bottom 44 and back 45 of the bucket, and a top plate 48. Seven rippers 52 are attached to bottom plate 42, staggered at regular intervals from bucket scooping edge 36 to the rear of plate 42. The forward six of ripper 52 are arranged in a V-con~iguration, with the center one of teeth 38 on edge 36 forming the apex of the V, and the rippers 52 at the rear of the V close to the bucket sides. The rear most ripper 52 is not part of the V, but is aligned with center tooth 38. As sho~n in Figure 2, no two rippers 52 are aligned with each other, either from side-to-side or from ~ront to back of bucket 30. Also, as shown in Figure 1, the clearance between each ripper 52 and the bottom 44 of the bucket progressively increases from ront to rear of the bucket.
Referring now to Figures 4 and 5, each ripper 52 includes a shank 56 fixed to the bucket bottom 44, and a ripper tooth 54 fitted over the end of the shank and held in place by a pin 60~
Each tooth 54 ~ncludes relati~el~ ~nclined upp&r and lower surfaces, 62, 64 respectively, which set in a point 66 at the front of ~he tooth. The polnts 66 of all of rippers 52 are equidistant ~rom the hinge pin 32 about which bucket 30 rotates relative to dlpperst~ck 22, as illustrated by arc A of rad~us R. As shown, the center one 9f teet~ 38 also lies on arc A. The upper ., ~Z7Z~
sur$ace 62 o~ each tooth 54 de~nes~ the tooth cutt~ng angle,~ which, for each of r~ppers~ 52, is between about 35 and 55~ and, pre~erably, 45. The lower surface 64 is pos~tioned so that ~t will not bottom-out ln the trench cut by the tooth as the bucket is pi~oted abou-t h~nge pin 32. The progressively greater clearance ~-~ront to rear~ between the r~pper and bucket bottom 42 is provided b~, as shown, a progressive increase in the length of shanks 56.
P~gure 3 shows an alternative embodiment in wh~ch plate 47' is welded or bolted to the bottom digging surface 44~ of bucket 30'. Rippers 52' are attached to plate 47' and are ident~cal to the rippers 52 of bucket 30. Depending on the curvature of suiface 44' of a particular bucket, the arc corresponding to A may not necessarily have a constant radius; however, the arrangement of progressively longer shanks and staggering of teeth with respect to edge 36 and the bucket sidewalls remains the same.
Figure 6 illustrates the effect of mounting rippers 52 on a constant radius measured from a point that is above ~Pl) or below (P2), rather than coincident with, hinge pin 32. As shown, mounting ~he rippers on a constant radius Rl, measured from Pl causes the arc Al, on which the teeth 541~ lie to ta~l in towards the bucket bottom 46 so that, as bucket 30 is rolled about hinge pin 32, the rippers pull away from the ground. With rippers so mounted, an operator would drop boom 22 as the bucket is rolled to maintain contact be-tween the rippers and the ground.
Similarly, mounting the rippers on a constant radius R2 measured from P2 causes the arc A2 on which teeth 542 lie to tail away from the bucket bottom 44, and the rippers will engage the ground more aggressively as bucket 30 is rolled about hinge pin 32.
Figure 7 shows a bucket 30" having a V-shaped bottom 44". Rippers 52" are attached to bottom 44" and are identical to the rippers 52 of bucket 30.
, : . ~ : :~ ~:: :
Viewed from the side, the arc A3 on ~h~ch th~ points 54" o~ rlppers 52" lie elliptical and, like arc Al of ~gure 6, tails ~n towards the bucket bottom.
If desired, the rippers may also be positioned so that teeth 54" lie on an elllptical arc A4 which, like ar A2 of ~igure 6, tails away ~rom the bucket bottom. Such elliptical arcs may be provided on either V-bottom buckets ~as shown) or on flat-bottom buckets swch as those shown in Figures 1 and 6.
Re~erring now to Figures 2 and 8-B, the center tooth 38 and rippers 52a-52f ~orming the "V" configuration earlier referred to are of such width and are so placed that, as bucket 30 is rolled, successive teeth fracture substrate into the groove cut by preceding teeth and leave a cut having flat continuous bottom.
Teeth such as those provided on the V-bottom bucket of Figure 7 may similarly be mounted, as shown in Figure 8-A, 50 that each trailing tooth fractures substrate into the groove cut by a preceding tooth and the teeth forming the "V" configuration ~as shown the center laading edge tooth 38" and six following rippers 52") make cuts extending substantially continuously the ~`
bucket width.
`~E~ on Actuator 28 ~the bucket cylinder) pivots the bucket about hinge pin 32 Cthe bucket's axis of attachment to dipperstick 22) causing the bucket to scoop loose substrate with the scooping edge and teeth and to rip compact su~strate with the rippers 52. It is also possible to rip by moving dlpper-stick 22, but much greater force is generally available from extending the bucket cylinder.
Because rippers 52 are not transversely aligned, they sequentially engage the substrate, permitting each tooth to pro~ide the maximum digging force.
The side-to-side staggering of the rippers inhibits rocks, frozen earth, etc.
... . , . . , ~ .:
, ,. ~ . , ~ ~ 2 7 f~ S
from ae~ng trapped between adjacent teeth, and t~e progressively increasing clearance bet~een the rippers and the ~ucket Bottom provides room for material loosened b~ forward tecth to pass between more rearward teeth and the bucket bottom without forc~ng the bucket up off the substrate which would disengage the more rearward teeth. The pre~erred "~" con~iguration ~front-to-rear) ripper pattern allo~s a trailing tooth to fracture the substrate into the groove already cut by a preceding tooth. As shown ~n ~igures 2, 7 and 8-A
and 8-B, the center lead tooth 38, 38" in the "V" makes the initlal cut, ripper 52a, 52"a fractures material from one side into the groove cut by tooth 38, 38", ripper 52b~ 52"b~ fractures material ~rom the other side into the groove cut by tooth 38, 38" ripper 52c, 52"c fractures material from the first side into the groove cut by tooth 52a, 521'a and so forth. The width and placement of the center tooth 38 and the rippers 52 are such that, as shown In ~igures 8-A and 8-B, the successi~e grooves they cut will essentially abut and spcm the entire bucket width. As the bucket 30 is pivoted about hinge pin 32, each tooth cuts at the optim~ cutting angle, without requiring adjustment or change in the pos~tion of the dipperstick.
The sequential ripping of teeth 54 is at controlled depths, and since all teeth are on a constant radius from the pivot point, the flat bottom buckets of Figures 1, 2 and 6 cut a flat-bottom trench automatically.
Other Embodiments In other embodiments the rippers can be arranged in staggered patterns, i.e., patterns in ~hich they do not align transversely or longitudin-ally, other than the front-to-rear "V"; the rippers may be bolted in place;
the front edge of the bucket can be straight rather than "V" shaped; the teeth on the front edge can have other configurations such as flat or bifuracted;
or, the front edge may be straight cutting edge and the leading ripper may lie .. . .. .. .
Z'7~5 be~xnd the ~ront edge and be mounted on -the bucket bo~tom.
~ n st~ urther em~od~ments, as noted w~th respect to -~gures 3, khe radius on which the teeth are mounted ma~ increase or decr~ase from ~ront to rear o~ the bucket rather than rema~n~ng constant.
These and other embodimen~ will be withln the scope of the ollow~ng claims.
Claims (21)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In an excavating bucket including two sides and curved bottom connecting said sides, said bottom having a front scooping edge, that improve-ment comprising:
a plurality of rippers protruding downwardly from said bottom and facing towards said scooping edge, said rippers being staggered at varying distances from said edge towards the back of said bucket and at varying dis-tances from the sides of said bucket.
a plurality of rippers protruding downwardly from said bottom and facing towards said scooping edge, said rippers being staggered at varying distances from said edge towards the back of said bucket and at varying dis-tances from the sides of said bucket.
2. The bucket of claim 1 wherein said rippers are spaced at regular intervals from said edge.
3. The bucket of claim 1 wherein at least the majority of said rippers do not align with each other either transversely or longitudinally of said bucket.
4. The bucket of claim 1 wherein said rippers are arranged in a V-configuration, with the apex of said V adjacent said scooping edge, and the rippers of said V do not align with each other either transversely or long-itudinally of said bucket.
5. The bucket of claim 1 including means defining the axis of rotation of said bucket relative to a dipperstick when said bucket is attached to said dipperstick, wherein each of said rippers defines a cutting edge, and wherein the distances from said axis to each of said ripper cutting edges are the same.
6, The bucket of claim 1 including not less than six of said rippers, at least three of said rippers lying on each side of the longitudinal center line of said bucket,
7. The bucket of claim 1 wherein one of said rippers is positioned adjacent each side of said bucket.
8. The bucket of claim 1 wherein each of said rippers defines a cutting edge and wherein for each of said rippers the distance from the cutting edge thereof to the bucket bottom is greater than the corresponding distance for any ripper more adjacent a said scooping edge and less than the corre-sponding distance for any ripper more distant from said scooping edge.
9. The bucket of claim 1 wherein each of said rippers includes a pair of relatively inclined surfaces defining a cutting edge, the upper one of said surfaces forming a cutting angle in the range of about 35 to 55 degrees and the lower one of said surfaces being arranged to lie above a line extending from the cutting edge of said ripper to the cutting edge of any ripper more distant from said scooping edge.
10. The bucket of claim 4 wherein the said ripper defining the apex of said V is mounted at said scooping edge.
11. The bucket of claim 1 including means defining the axis of rotation of said bucket relative to said dipperstick when said bucket is attached to said dipperstick, and wherein each of said ripper cutting edges lies on an arc of constant radius having its center at a point either above or below said axis of rotation.
12. The bucket of claim 1 wherein said rippers are positioned such that said ripper cutting edges lie in an arc.
13. The bucket of claim 12 wherein said arc is of constant radius.
14. The bucket of claim 12 wherein said arc is elliptical.
15. The bucket of claim 13 or claim 14 wherein the distance from said arc to means defining the axis of rotation of said bucket relative to a dipper-stick when said bucket is attached to said dipperstick is greater adjacent the front of said bucket than towards the rear of said bucket.
16. The bucket of claim 13 or claim 14 wherein the distance from said arc to means defining the axis of rotation of said bucket relative to a dipper-stick when said bucket is attached to said dipperstick is less adjacent the front of said bucket than towards the rear of said bucket.
17. The bucket of claim 1 or claim 2 or claim 3 wherein said rippers are attached to a mounting plate, and said mounting plate is attached to the bottom of said bucket.
18. The bucket of claim 4 or claim 5 or claim 6 wherein said rippers are attached to a mounting plate, and said mounting plate is attached to the bottom of said bucket.
19. The bucket of claim 1 wherein said bottom is flat.
20. The bucket of claim 1 wherein said bottom is V-shaped.
21. For connection to an excavating bucket of the type including two sides and a curved bottom connecting said sides, a mounting plate adapted for connection to the bottom of said bucket, and a plurality of rippers protruding downwardly from said plate and facing towards a leading edge thereof, said rippers being staggered at varying distances from the leading edge of said plate towards the trailing edge of said plate and at varying distances from the sides of said plate, and being arranged so that no two of said rippers are aligned either transversely or longitudinally of said plate.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US129,489 | 1980-03-10 | ||
| US06/129,489 US4279085A (en) | 1980-03-10 | 1980-03-10 | Excavating buckets |
| US23880181A | 1981-02-27 | 1981-02-27 | |
| US238,801 | 1981-02-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1127205A true CA1127205A (en) | 1982-07-06 |
Family
ID=26827618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA372,528A Expired CA1127205A (en) | 1980-03-10 | 1981-03-09 | Excavating buckets |
Country Status (5)
| Country | Link |
|---|---|
| BR (1) | BR8101397A (en) |
| CA (1) | CA1127205A (en) |
| DE (1) | DE3109047A1 (en) |
| GB (1) | GB2073138B (en) |
| SE (1) | SE460206B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2347921A (en) * | 1999-03-17 | 2000-09-20 | Lee Shearsby Dodd Ltd | Excavator tool with cutting elements arranged on a convex surface |
| CN102677723B (en) * | 2012-06-01 | 2014-08-20 | 浙江绿如蓝工程建设有限公司 | Rectangular cast-in-place pile pore-forming device |
| CN111691475A (en) * | 2020-06-28 | 2020-09-22 | 龙工(上海)机械制造有限公司 | Loader viscidity-reducing and guide-benefiting type bucket |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US740165A (en) * | 1903-05-27 | 1903-09-29 | Anthony Masino | Electric shovel. |
| US3471950A (en) * | 1967-03-22 | 1969-10-14 | Ray Ferwerda | Combined digging bucket and saw |
| DK126698B (en) * | 1970-06-18 | 1973-08-13 | Orenstein & Koppel Ag | Earth-moving machine with leveling device for setting a work tool, in particular an excavator, in the machine. |
| US3724899A (en) * | 1971-05-14 | 1973-04-03 | H Clark | Tooth for backhoe bucket |
| US4041624A (en) * | 1974-04-17 | 1977-08-16 | Caterpillar Tractor Co. | Integral rippers for hydraulic excavator bucket |
| US4038766A (en) * | 1975-12-23 | 1977-08-02 | Felstet Rickerd M | Excavator bucket ripper tool |
-
1981
- 1981-03-09 CA CA372,528A patent/CA1127205A/en not_active Expired
- 1981-03-09 GB GB8107341A patent/GB2073138B/en not_active Expired
- 1981-03-09 SE SE8101467A patent/SE460206B/en not_active IP Right Cessation
- 1981-03-10 BR BR8101397A patent/BR8101397A/en unknown
- 1981-03-10 DE DE19813109047 patent/DE3109047A1/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| GB2073138B (en) | 1984-01-18 |
| SE460206B (en) | 1989-09-18 |
| DE3109047A1 (en) | 1982-02-04 |
| GB2073138A (en) | 1981-10-14 |
| BR8101397A (en) | 1981-09-15 |
| SE8101467L (en) | 1981-09-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |