CA2589402A1 - Excavator bucket - Google Patents
Excavator bucket Download PDFInfo
- Publication number
- CA2589402A1 CA2589402A1 CA 2589402 CA2589402A CA2589402A1 CA 2589402 A1 CA2589402 A1 CA 2589402A1 CA 2589402 CA2589402 CA 2589402 CA 2589402 A CA2589402 A CA 2589402A CA 2589402 A1 CA2589402 A1 CA 2589402A1
- Authority
- CA
- Canada
- Prior art keywords
- blade
- excavator bucket
- degrees
- mounting
- piercing end
- 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.)
- Abandoned
Links
- 239000000463 material Substances 0.000 description 8
- 239000002689 soil Substances 0.000 description 4
- 239000004927 clay Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Component Parts Of Construction Machinery (AREA)
Abstract
An excavator bucket includes a mounting and a blade. The blade extends downwardly from the mounting at an angle of between 30 degrees and 55 degrees. The blade has a mounting attachment end which is attached to the mounting, a ground piercing end, and opposed upstanding outwardly angled sidewalls. The blade has a forward oriented curvature or bend spaced from the ground piercing end.
Description
TITLE OF THE INVENTION:
Excavator bucket FIELD OF THE INVENTION
The present invention relates to an excavator bucket designed to minimize ground disturbance during use.
BACKGROUND OF THE INVENTION
It is desirable to minimize ground disturbance when excavating. Canadian Patent Applications 2,549,370 and 2,557,838 disclose excavator buckets which were developed to minimize ground disturbance when working in environmentally sensitive areas.
SUMMARY OF THE INVENTION
There is provided an excavator bucket which includes a mounting and a blade.
The blade extends downwardly from the mounting at an angle of between 30 degrees and 55 degrees. The blade has a mounting attachment end which is attached to the mounting, a ground piercing end, and opposed upstanding outwardly angled sidewalls. The blade has a forward oriented curvature or bend spaced from the ground piercing end.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other features of the invention will become more apparent from the following description in which reference is made to the appended drawings, the drawings are for the purpose of illustration only and are not intended to in any way limit the scope of the invention to the particular embodiment or embodiments shown, wherein:
FIG. 1 is a side elevation view of the excavator bucket constructed in accordance with the teachings of the present invention.
FIG. 2 is a front elevation view of the excavator bucket of FIG. 1.
FIG. 3 is a top plan view of the excavator bucket of FIG. 1.
FIG. 4 is a side elevation view of an altemative embodiment of the excavator bucket of FIG.1.
FIG. 5 is a side elevation view of a second alternative embodiment of the excavator bucket of FIG. 1.
Excavator bucket FIELD OF THE INVENTION
The present invention relates to an excavator bucket designed to minimize ground disturbance during use.
BACKGROUND OF THE INVENTION
It is desirable to minimize ground disturbance when excavating. Canadian Patent Applications 2,549,370 and 2,557,838 disclose excavator buckets which were developed to minimize ground disturbance when working in environmentally sensitive areas.
SUMMARY OF THE INVENTION
There is provided an excavator bucket which includes a mounting and a blade.
The blade extends downwardly from the mounting at an angle of between 30 degrees and 55 degrees. The blade has a mounting attachment end which is attached to the mounting, a ground piercing end, and opposed upstanding outwardly angled sidewalls. The blade has a forward oriented curvature or bend spaced from the ground piercing end.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other features of the invention will become more apparent from the following description in which reference is made to the appended drawings, the drawings are for the purpose of illustration only and are not intended to in any way limit the scope of the invention to the particular embodiment or embodiments shown, wherein:
FIG. 1 is a side elevation view of the excavator bucket constructed in accordance with the teachings of the present invention.
FIG. 2 is a front elevation view of the excavator bucket of FIG. 1.
FIG. 3 is a top plan view of the excavator bucket of FIG. 1.
FIG. 4 is a side elevation view of an altemative embodiment of the excavator bucket of FIG.1.
FIG. 5 is a side elevation view of a second alternative embodiment of the excavator bucket of FIG. 1.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The prefen:ed embodiment, an excavator bucket generally identified by reference numeral 10, will now be described with reference to FIG. 1 through 3.
Structure and Relationship of Parts:
Referring to FIG. 1, excavator bucket 10 includes a mounting 12 including mounting plate 13 and a blade 14. Blade 14 extends downwardly from mounting 12 at an angle of 45 degrees, but preferably between 30 degrees and 55 degrees. Referring to FIG.
The prefen:ed embodiment, an excavator bucket generally identified by reference numeral 10, will now be described with reference to FIG. 1 through 3.
Structure and Relationship of Parts:
Referring to FIG. 1, excavator bucket 10 includes a mounting 12 including mounting plate 13 and a blade 14. Blade 14 extends downwardly from mounting 12 at an angle of 45 degrees, but preferably between 30 degrees and 55 degrees. Referring to FIG.
3, blade 14 has a mounting attachment end 16, a ground piercing end 18, and opposed upstanding sidewalls 20. Referring to FIG. 2, sidewalls 20 may angle outwardly from blade 14, such by an outward bend of between 10 and 45 degrees. As sidewalls 20 extend upward and outward, it is easier to remove soil from blade 14 during digging. Getting the dirt out of buckets or blades is a particular concern in wet clay or sticky mud. If wet clay or mud is being dug, it may also be preferable to have shorter sidewalls 20. To improve the ground piercing capability of blade 14, teeth 22 may project forward from ground piercing end 18. Referring again to FIG. 1, blade 14 has a forward oriented bend 24 at an angle of 20 degrees, but preferably between 15 degrees and 25 degrees. As depicted, sidewalls 20 slope downwardly from bend 24 to ground piercing end 18, such that sidewalls 20 are negligible at ground piercing end 18. Bend 24 is spaced from ground piercing end 18 approximately one third of the way along blade 14. The length of blade 14 from attachment end 16 to ground piercing end 18 is greater than five times the width of blade 14 between sidewalls 20.
Operation:
Excavator bucket 10 is attached to a prime mover, such as a back hoe, by mounting 12. Excavator bucket 10 is inserted and moves through the ground based primarily on the horizontal pulling force pulling toward the prime mover (not shown) to provide the necessary force to excavate. The pulling force of the excavator moves material into excavator bucket 10 as blade 14 moves horizontally along the length of the ditch. It is to be noted that this is a horizontal force and does not use a tip radius or curl force, as do other buckets. Teeth 22 help ground piercing end 18 to break and pass through the soil. Bend 24 assists in moving soil into and upward along excavator bucket 10 from ground piercing end 18 toward attachment end 16. Once excavator bucket 10 is filled, low sidewalls 20 which are tilted outwardly allows for easy cleaning of excavator bucket 10 in most, if not all soil conditions.
While excavator bucket 10 may be made in any size, it is preferred that it be made long and narrow. The desired length will depend upon the depth of ditch or trench being excavated. It is preferred that the length of blade 14 be selected to enable excavator bucket to reach the desired depth for the trench without mounting plate 13 for the quick attached assembly entering into the ditch. This allows the trench to be much narrower, perhaps as much as one third of the width of trenches dug with conventional excavator buckets.
Variation:
Referring to FIG. 4, instead of blade 14 having a single bend 24 as depicted in FIG.
1, blade 14 could also have a curvature (continuous bend) that begins at attachment end 16 and continues until ground piercing end 18, or that includes a substantial portion of blade 14.
If this were done, it would be a tangent taken at a point partway along blade 14 that would be at 45 degrees, and a tangent taken near ground piercing end 18 that would be at 20 degrees.
Further Variation:
Referring to FIG. 5, excavator bucket 100 includes many elements similar to those described above, and are therefore indicated by similar reference numbers. In this variation, blade 102 also has a forward oriented curvature or bend 24 spaced from ground piercing end 18 and oriented at an angle of between 10 degrees and 30 degrees, similar to blade 14 described above. Curvature or bend 24 is spaced from ground piercing end 18 approximately one third of the way along blade 14, with sidewalls 20 sloping downwardly from curvature or bend 24 to ground piercing end 18. The main difference in this variation is that the width of blade 14 is between 60 inches and 96 inches, rather than the more narrow blade 14 described previously.
At the time that Canadian Patent Application 2,549,370 and Canadian Patent Application 2,557,838 were filed, it was not appreciated that versions of the excavator bucket could be manufactured which would be capable of competing with a conventional excavator bucket. The earlier embodiments were all narrow and long. Early attempts were made to limit the width to between 10 inches and 30 inches, with a length of between 5 feet and 7 feet. It is now appreciated that the workable range is much greater than originally imagined. The width can vary between 3 inches (narrower than first envisaged) and 96 inches (much wider than first envisaged). The length can vary between 3 feet and 9 feet. With the embodiment depicted in FIG. 5 the width and length of the blade are roughly equal. With narrow blades of less than 36 inches in width, the length will always exceed the width.
However, as the blade is made wider, this changes until in the sizes over 36 inches, where they the width and length can be roughly equal. The term "roughly equal" is used, as the length may be marginally larger than the width. The key to understanding the advantages provided by the current blade in which the width and length are roughly equal lies in a comparison of the "bulk up factor" for the conventional excavator bucket, as compared to the above described excavator bucket. A conventional excavator bucket has a bulk up factor of 2.3, whereas the above described excavator bucket has a bulk up factor of 1.3. By way of example, assume that both buckets are working to dig a ditch that is 2 meters wide and 2 meters deep. The minimum material excavated is 4 cubic meters. However, the additional material that a conventional excavator bucket invariably removes is 2.3 that amount for a total of 9.2 meters of material that must be moved and stored. When the same excavation is performed with the excavator blade described above, the minimum material excavated is still 4 cubic meters.
However, the additional material that is invariably removed is only 1.3 that amount for a total of 5.2 meters. The difference is the size of the right of way required to store material and the amount of material that must be removed and replaced is significant.
In this patent document, the word "comprising" is used in its non-limiting sense to mean that items following the word are included, but items not specifically mentioned are not excluded. A reference to an element by the indefinite article "a" does not exclude the possibility that more than one of the element is present, unless the context clearly requires that there be one and only one of the elements.
It will be apparent to one skilled in the art that modifications may be made to the illustrated embodiment without departing from the spirit and scope of the invention as hereinafter defined in the Claims.
Operation:
Excavator bucket 10 is attached to a prime mover, such as a back hoe, by mounting 12. Excavator bucket 10 is inserted and moves through the ground based primarily on the horizontal pulling force pulling toward the prime mover (not shown) to provide the necessary force to excavate. The pulling force of the excavator moves material into excavator bucket 10 as blade 14 moves horizontally along the length of the ditch. It is to be noted that this is a horizontal force and does not use a tip radius or curl force, as do other buckets. Teeth 22 help ground piercing end 18 to break and pass through the soil. Bend 24 assists in moving soil into and upward along excavator bucket 10 from ground piercing end 18 toward attachment end 16. Once excavator bucket 10 is filled, low sidewalls 20 which are tilted outwardly allows for easy cleaning of excavator bucket 10 in most, if not all soil conditions.
While excavator bucket 10 may be made in any size, it is preferred that it be made long and narrow. The desired length will depend upon the depth of ditch or trench being excavated. It is preferred that the length of blade 14 be selected to enable excavator bucket to reach the desired depth for the trench without mounting plate 13 for the quick attached assembly entering into the ditch. This allows the trench to be much narrower, perhaps as much as one third of the width of trenches dug with conventional excavator buckets.
Variation:
Referring to FIG. 4, instead of blade 14 having a single bend 24 as depicted in FIG.
1, blade 14 could also have a curvature (continuous bend) that begins at attachment end 16 and continues until ground piercing end 18, or that includes a substantial portion of blade 14.
If this were done, it would be a tangent taken at a point partway along blade 14 that would be at 45 degrees, and a tangent taken near ground piercing end 18 that would be at 20 degrees.
Further Variation:
Referring to FIG. 5, excavator bucket 100 includes many elements similar to those described above, and are therefore indicated by similar reference numbers. In this variation, blade 102 also has a forward oriented curvature or bend 24 spaced from ground piercing end 18 and oriented at an angle of between 10 degrees and 30 degrees, similar to blade 14 described above. Curvature or bend 24 is spaced from ground piercing end 18 approximately one third of the way along blade 14, with sidewalls 20 sloping downwardly from curvature or bend 24 to ground piercing end 18. The main difference in this variation is that the width of blade 14 is between 60 inches and 96 inches, rather than the more narrow blade 14 described previously.
At the time that Canadian Patent Application 2,549,370 and Canadian Patent Application 2,557,838 were filed, it was not appreciated that versions of the excavator bucket could be manufactured which would be capable of competing with a conventional excavator bucket. The earlier embodiments were all narrow and long. Early attempts were made to limit the width to between 10 inches and 30 inches, with a length of between 5 feet and 7 feet. It is now appreciated that the workable range is much greater than originally imagined. The width can vary between 3 inches (narrower than first envisaged) and 96 inches (much wider than first envisaged). The length can vary between 3 feet and 9 feet. With the embodiment depicted in FIG. 5 the width and length of the blade are roughly equal. With narrow blades of less than 36 inches in width, the length will always exceed the width.
However, as the blade is made wider, this changes until in the sizes over 36 inches, where they the width and length can be roughly equal. The term "roughly equal" is used, as the length may be marginally larger than the width. The key to understanding the advantages provided by the current blade in which the width and length are roughly equal lies in a comparison of the "bulk up factor" for the conventional excavator bucket, as compared to the above described excavator bucket. A conventional excavator bucket has a bulk up factor of 2.3, whereas the above described excavator bucket has a bulk up factor of 1.3. By way of example, assume that both buckets are working to dig a ditch that is 2 meters wide and 2 meters deep. The minimum material excavated is 4 cubic meters. However, the additional material that a conventional excavator bucket invariably removes is 2.3 that amount for a total of 9.2 meters of material that must be moved and stored. When the same excavation is performed with the excavator blade described above, the minimum material excavated is still 4 cubic meters.
However, the additional material that is invariably removed is only 1.3 that amount for a total of 5.2 meters. The difference is the size of the right of way required to store material and the amount of material that must be removed and replaced is significant.
In this patent document, the word "comprising" is used in its non-limiting sense to mean that items following the word are included, but items not specifically mentioned are not excluded. A reference to an element by the indefinite article "a" does not exclude the possibility that more than one of the element is present, unless the context clearly requires that there be one and only one of the elements.
It will be apparent to one skilled in the art that modifications may be made to the illustrated embodiment without departing from the spirit and scope of the invention as hereinafter defined in the Claims.
Claims (11)
1. An excavator bucket, comprising:
a mounting;
a blade extending downwardly from the mounting at an angle of between 30 degrees and 55 degrees, the blade having a mounting attachment end which is attached to the mounting, a ground piercing end, and opposed upstanding outwardly angled sidewalls, and the blade having a forward oriented curvature or bend spaced from the ground piercing end.
a mounting;
a blade extending downwardly from the mounting at an angle of between 30 degrees and 55 degrees, the blade having a mounting attachment end which is attached to the mounting, a ground piercing end, and opposed upstanding outwardly angled sidewalls, and the blade having a forward oriented curvature or bend spaced from the ground piercing end.
2. The excavator bucket as defined in Claim 1, wherein the bend is at an angle of between 10 degrees and 30 degrees.
3. The excavator bucket as defined in Claim 1, wherein teeth project forward from the ground piercing end.
4. The excavator bucket as defined in Claim 1, wherein the curvature or bend is spaced from the ground piercing end approximately one third of the way along the blade.
5. The excavator bucket as defined in Claim 1, wherein the sidewalls slope downwardly from the curvature or bend to the ground piercing end.
6. The excavator bucket as defined in Claim 1, wherein the blade has a width of between 3 inches and 96 inches.
7. The excavator bucket as defined in Claim 6, wherein the blade has a width of between 36 inches and 96 inches.
8. The excavator bucket as defined in Claim 1, wherein the blade has a length of between 3 feet and 9 feet.
9. An excavator bucket, comprising:
a mounting;
a blade extending downwardly from the mounting at an angle of between 30 degrees and 55 degrees, the blade having a mounting attachment end which is attached to the mounting, a ground piercing end, and opposed upstanding outwardly angled sidewalls, and the blade having a forward oriented curvature or bend spaced from the ground piercing end and oriented at an angle of between 10 degrees and 30 degrees, the curvature or bend being spaced from the ground piercing end approximately one third of the way along the blade, the sidewalls sloping downwardly from the curvature or bend to the ground piercing end;
the blade having a width of between 3 inches and 96 inches and a length of between 3 feet and 9 feet.
a mounting;
a blade extending downwardly from the mounting at an angle of between 30 degrees and 55 degrees, the blade having a mounting attachment end which is attached to the mounting, a ground piercing end, and opposed upstanding outwardly angled sidewalls, and the blade having a forward oriented curvature or bend spaced from the ground piercing end and oriented at an angle of between 10 degrees and 30 degrees, the curvature or bend being spaced from the ground piercing end approximately one third of the way along the blade, the sidewalls sloping downwardly from the curvature or bend to the ground piercing end;
the blade having a width of between 3 inches and 96 inches and a length of between 3 feet and 9 feet.
10. The excavator bucket of Claim 9, wherein the width is between 36 inches and 96 inches.
11. The Excavator blade as defined in Claim 9, wherein the blade has a width and a length that are roughly equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2589402 CA2589402A1 (en) | 2006-05-15 | 2007-05-15 | Excavator bucket |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2,549,370 | 2006-05-15 | ||
| CA002549370A CA2549370A1 (en) | 2006-05-15 | 2006-05-15 | Excavator blade |
| CA 2557838 CA2557838A1 (en) | 2006-05-15 | 2006-08-24 | Excavator bucket |
| CA2,557,838 | 2006-08-24 | ||
| CA 2589402 CA2589402A1 (en) | 2006-05-15 | 2007-05-15 | Excavator bucket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2589402A1 true CA2589402A1 (en) | 2007-11-15 |
Family
ID=38686961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2589402 Abandoned CA2589402A1 (en) | 2006-05-15 | 2007-05-15 | Excavator bucket |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2589402A1 (en) |
-
2007
- 2007-05-15 CA CA 2589402 patent/CA2589402A1/en not_active Abandoned
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |