CA2523513A1 - Tooth and adaptor assembly for a dipper bucket - Google Patents
Tooth and adaptor assembly for a dipper bucket Download PDFInfo
- Publication number
- CA2523513A1 CA2523513A1 CA002523513A CA2523513A CA2523513A1 CA 2523513 A1 CA2523513 A1 CA 2523513A1 CA 002523513 A CA002523513 A CA 002523513A CA 2523513 A CA2523513 A CA 2523513A CA 2523513 A1 CA2523513 A1 CA 2523513A1
- Authority
- CA
- Canada
- Prior art keywords
- adaptor
- tooth
- retainer pin
- passageway
- assembly
- 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
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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
- E02F9/2816—Mountings therefor
- E02F9/2833—Retaining means, e.g. pins
-
- 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
- E02F9/2825—Mountings therefor using adapters
-
- 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
- E02F9/2841—Retaining means, e.g. pins resilient
Abstract
A tooth and adaptor assembly is provided for a dipper bucket. The assembly comprises an adaptor having a rear portion for attaching to the dipper bucket, a tooth capable of releasable attachment to the adaptor and a retainer pin for securing the tooth to the adaptor. The adaptor further comprises a tapering intermediate portion that narrows to a rectangular front portion. The adaptor further comprises a planar surface on a portion of its intermediate portion and a groove that traverses the planar surface, the groove perpendicular to the horizontal longitudinal axis of the adaptor.
The tooth has a tip at its front end for digging and a socket at its rear end configured to receive the front and intermediate portions of the adaptor. An opening on the rear end of the tooth aligns with the groove when the tooth is coupled to the adaptor to define a passageway that terminates within the socket of the tooth. The retainer pin is adapted to be inserted into the passageway to secure the tooth to the adaptor and complete the assembly.
The tooth has a tip at its front end for digging and a socket at its rear end configured to receive the front and intermediate portions of the adaptor. An opening on the rear end of the tooth aligns with the groove when the tooth is coupled to the adaptor to define a passageway that terminates within the socket of the tooth. The retainer pin is adapted to be inserted into the passageway to secure the tooth to the adaptor and complete the assembly.
Description
1 "TOOTH AND ADAPTOR ASSEMBLY FOR A DIPPER BUCKET"
2 INVENTOR: Neil Douglas Bentley 4 The present invention relates to excavating equipment, and more particularly to an adaptor and tooth assembly for a dipper bucket.
7 Excavation practice in construction and mining applications is often most 8 efficiently carried out when ground engaging, penetration attachments (tooth and 9 adaptor assemblies) are securely mounted on the leading digging edge of the excavation dipper bucket and/or excavation equipment. Usually, the adaptor(s) are 11 rigidly attached by either welding or some form of mechanical fastener(s).
12 This chisel-like assembly reduces the initial contact mass of the bucket edge 13 moving into the materials) being excavated by focusing the accumulated digging 14 forces at the leading tooth point(s); thereby, maximizing the penetration efficiency of the excavating equipment. The loosened materials) can then be freely loaded into the 16 excavation bucket or diverted around the assembly when only break-up excavation is 17 the prime motive. Abrasive grinding, mufti-directional stresses and shock loading at 18 exceedingly high levels can continuously and abruptly assault the integrity of the 19 tooth and adaptor assembly during any given excavation application.
Canadian Patent 1,243,059 and US Patent 4,481,728 represented the first 21 generation elliptical tooth and adaptor system. This system demonstrated the use of a 22 three-piece system in mining applications. This system enabled the user to replace the 23 primary consumable tooth separate from the fixed carrier adaptor. Any number of {E5098882.DOC;1 }
1 consumable teeth could then be readily fitted to the adaptor and replaced as each 2 became worn out.
3 Although the prior art disclosing the first generation elliptical tooth and 4 adaptor system was functional, this system required certain installation and removal techniques that reduced its use in the field. Some of the shortcomings of this prior art 6 include the use of an oversized locking pin that incorporated compressive elastomeric 7 material vulcanized between two rigid members of the locking pin. Excessive force 8 had to be applied by a sledgehammer to sufficiently compress the pin to permit full 9 insertion into a smaller hole that received the lock pin. Installation and removal of the locking pin was also time consuming and physically difficult, particularly if the head 11 of the pin became flattened (mushroom shaped) from repeated hammer blows.
The 12 arduous practice of changing out worn teeth and installing new teeth eventually 13 became a safety concern. This original design is no longer acceptable to maintenance 14 workers in certain mining applications. In addition, several other features of this design eventually became a concern.
16 The first generation elliptical locking pin was dependent upon the physical 17 properties of the vulcanized elastomeric material to carry out its required job of 18 maintaining the tooth fully on the adaptor. Deterioration of the elastomeric material 19 was a common occurrence and the structural design of this tooth and adaptor system restricted the possibility of establishing a preferred locking system not so depended on 21 this component. This type of locking pin was not reusable.
22 Extreme flowing pressures (several tons) of excavated materials beneath the 23 shovel bucket tended to force the original style of lock pin upward and out of the 2 {E5098882.DOC;1 }
1 locked position, Occasionally, these pins would actually be forced completely out 2 and the tooth would fall off.
3 The first generation elliptical system was designed with an aligning common 4 through hole located centrally in both mated structural members when the tooth was fully fitted to the adaptor. The resulting aligned through holes formed an opening to 6 accept the locking pin. The loss of structural mass in the tooth sidewalk weakened 7 this component, and occasionally, the tooth would break when subjected to severe 8 digging applications.
9 The first generation elliptical system was designed with the tooth not being completely stable while resting on the adaptor and without the lock pin installed. If a 11 maintenance worker unintentionally bumped an unlocked tooth, it could easily slide 12 off, resulting in an injury to the worker.
13 Other prior art based on the above-noted system had gaps on the assembled 14 tooth and adaptor, and within and around the lock pinholes. This condition can leave the mating fit surfaces of the assembly, the lock pin bearing support surfaces and its 16 related structural members vulnerable to the extreme flowing pressures (several tons) 17 of excavated materials that are readily forced into these gaps. The abrasive qualities 18 of the ore, combined with any movement between the assembled components during 19 the excavation process create an aggressive grinding effect that deteriorates these important dimensional load-bearing surfaces. The resulting wear can contribute to a 21 "loose fit" condition affecting all three assembled components. This condition is 22 especially true when certain "self lubricated" and highly abrasive ores such as tar 23 sand are being excavated. These ores have the inherent ability to quickly enter all 24 gaps and internal aspects of the mated assembly. If the retainer lock pin does become 3 {E5098882.DOC; l }
1 loose and falls out, the tooth and adaptor can uncouple, leaving the less wear-resistant 2 adaptor male mating nose exposed to harsh wear from the continuing excavation 3 process.
4 It is, therefore, desirable to have a tooth and adaptor assembly for a dipper bucket that overcomes the shortcomings of the prior art described above.
7 The present invention is a tooth and adaptor assembly for a dipper bucket.
In 8 a representative embodiment, the assembly comprises an adaptor having a front 9 portion, an intermediate portion and a rear portion. The rear portion is adapted for attaching to a dipper bucket as well known to those skilled in the art. The 11 intermediate portion extends between the front and rear portions and has a 12 substantially circular base adjacent to the rear portion. The intermediate portion 13 tapers or narrows in cross-section from its base to the front portion.
Preferably, the 14 intermediate portion has an elliptical cross-section. The front portion has a substantially flat front end. The exterior surface of the intermediate portion has a 16 portion of its surface that is substantially planar thereby making the intermediate 17 portion roughly D-shaped in cross section. A groove is disposed along the planar 18 surface, the groove being perpendicular to a longitudinal axis passing through the 19 center of the front, intermediate and rear portions. Preferably, the groove is rectangular in cross-section.
21 The assembly also comprises a tooth having a front tip portion adapted for 22 excavating and an enlarged rear portion extending from the front end. The enlarged 23 rear portion comprises a top surface and a socket configured to accommodate the 24 front and intermediate portions of the adaptor in a coupled position.
Specifically, the 4 {E5098882.DOC;1 }
1 socket has an opening adapted to mate with the base of the intermediate portion and a 2 bottom with a flat surface to mate with the front portion. The socket has an interior 3 wall surface that is initially cylindrical at the entrance and then tapers to the bottom, 4 the interior wall surface having a portion that is planar such that it mates with the exterior surface of the intermediate portion of the adaptor. The enlarged rear portion 6 of the tooth also has an opening, which is offset to one side on the top surface. The 7 opening is in alignment with the adaptor groove when the tooth is fully seated on the 8 adaptor thereby defining a passageway that extends from the top surface and 9 terminates within the entrance of the tooth socket. A retainer pin inserted into the passageway and driven downwardly towards a "home" latched position secures the 11 tooth on the adaptor. The retainer pin can be removed by urging it upwardly out of 12 the passageway.
13 Accordingly, the present invention relates to an assembly of three interlocking 14 components - a tooth, an adaptor and retainer pin. The present invention may be characterized by the elements as set forth below.
16 In one embodiment, the present invention utilizes an offset, substantially 17 vertical retainer pin whereby installation and removal of the retainer pin is performed 18 from the top surface of the tooth. There is no bottom through-hole necessary in the 19 bottom of the tooth to "drift" the retainer pin out in order to disassemble the tooth from the adaptor. This design prevents entry of highly pressurized compaction forces 21 from beneath that can force the typical base exposed retainer pins) upward and out of 22 their latched position.
23 In another embodiment, the present invention provides an enclosed assembly 24 comprising three components including a tooth, an adaptor and a retainer pin. The 5 {E5098882.DOC;1 }
1 components are configured in such a way that the mated surfaces of the assembled 2 components minimize debris from entering certain areas of the coupled and latched 3 tooth and adaptor assembly. In another representative embodiment, the retainer pin 4 has an enlarged head with a bottom surface having a beveled seating collar completely around and beneath the head. The head is adapted to cover the entirety of 6 the retainer pin opening and to mate with the tooth top surface so as to prevent debris 7 from entering the passageway. The head of the retainer pin does have some exposure 8 to falling excavated debris that can assist in maintaining the retainer pin in its "home"
7 Excavation practice in construction and mining applications is often most 8 efficiently carried out when ground engaging, penetration attachments (tooth and 9 adaptor assemblies) are securely mounted on the leading digging edge of the excavation dipper bucket and/or excavation equipment. Usually, the adaptor(s) are 11 rigidly attached by either welding or some form of mechanical fastener(s).
12 This chisel-like assembly reduces the initial contact mass of the bucket edge 13 moving into the materials) being excavated by focusing the accumulated digging 14 forces at the leading tooth point(s); thereby, maximizing the penetration efficiency of the excavating equipment. The loosened materials) can then be freely loaded into the 16 excavation bucket or diverted around the assembly when only break-up excavation is 17 the prime motive. Abrasive grinding, mufti-directional stresses and shock loading at 18 exceedingly high levels can continuously and abruptly assault the integrity of the 19 tooth and adaptor assembly during any given excavation application.
Canadian Patent 1,243,059 and US Patent 4,481,728 represented the first 21 generation elliptical tooth and adaptor system. This system demonstrated the use of a 22 three-piece system in mining applications. This system enabled the user to replace the 23 primary consumable tooth separate from the fixed carrier adaptor. Any number of {E5098882.DOC;1 }
1 consumable teeth could then be readily fitted to the adaptor and replaced as each 2 became worn out.
3 Although the prior art disclosing the first generation elliptical tooth and 4 adaptor system was functional, this system required certain installation and removal techniques that reduced its use in the field. Some of the shortcomings of this prior art 6 include the use of an oversized locking pin that incorporated compressive elastomeric 7 material vulcanized between two rigid members of the locking pin. Excessive force 8 had to be applied by a sledgehammer to sufficiently compress the pin to permit full 9 insertion into a smaller hole that received the lock pin. Installation and removal of the locking pin was also time consuming and physically difficult, particularly if the head 11 of the pin became flattened (mushroom shaped) from repeated hammer blows.
The 12 arduous practice of changing out worn teeth and installing new teeth eventually 13 became a safety concern. This original design is no longer acceptable to maintenance 14 workers in certain mining applications. In addition, several other features of this design eventually became a concern.
16 The first generation elliptical locking pin was dependent upon the physical 17 properties of the vulcanized elastomeric material to carry out its required job of 18 maintaining the tooth fully on the adaptor. Deterioration of the elastomeric material 19 was a common occurrence and the structural design of this tooth and adaptor system restricted the possibility of establishing a preferred locking system not so depended on 21 this component. This type of locking pin was not reusable.
22 Extreme flowing pressures (several tons) of excavated materials beneath the 23 shovel bucket tended to force the original style of lock pin upward and out of the 2 {E5098882.DOC;1 }
1 locked position, Occasionally, these pins would actually be forced completely out 2 and the tooth would fall off.
3 The first generation elliptical system was designed with an aligning common 4 through hole located centrally in both mated structural members when the tooth was fully fitted to the adaptor. The resulting aligned through holes formed an opening to 6 accept the locking pin. The loss of structural mass in the tooth sidewalk weakened 7 this component, and occasionally, the tooth would break when subjected to severe 8 digging applications.
9 The first generation elliptical system was designed with the tooth not being completely stable while resting on the adaptor and without the lock pin installed. If a 11 maintenance worker unintentionally bumped an unlocked tooth, it could easily slide 12 off, resulting in an injury to the worker.
13 Other prior art based on the above-noted system had gaps on the assembled 14 tooth and adaptor, and within and around the lock pinholes. This condition can leave the mating fit surfaces of the assembly, the lock pin bearing support surfaces and its 16 related structural members vulnerable to the extreme flowing pressures (several tons) 17 of excavated materials that are readily forced into these gaps. The abrasive qualities 18 of the ore, combined with any movement between the assembled components during 19 the excavation process create an aggressive grinding effect that deteriorates these important dimensional load-bearing surfaces. The resulting wear can contribute to a 21 "loose fit" condition affecting all three assembled components. This condition is 22 especially true when certain "self lubricated" and highly abrasive ores such as tar 23 sand are being excavated. These ores have the inherent ability to quickly enter all 24 gaps and internal aspects of the mated assembly. If the retainer lock pin does become 3 {E5098882.DOC; l }
1 loose and falls out, the tooth and adaptor can uncouple, leaving the less wear-resistant 2 adaptor male mating nose exposed to harsh wear from the continuing excavation 3 process.
4 It is, therefore, desirable to have a tooth and adaptor assembly for a dipper bucket that overcomes the shortcomings of the prior art described above.
7 The present invention is a tooth and adaptor assembly for a dipper bucket.
In 8 a representative embodiment, the assembly comprises an adaptor having a front 9 portion, an intermediate portion and a rear portion. The rear portion is adapted for attaching to a dipper bucket as well known to those skilled in the art. The 11 intermediate portion extends between the front and rear portions and has a 12 substantially circular base adjacent to the rear portion. The intermediate portion 13 tapers or narrows in cross-section from its base to the front portion.
Preferably, the 14 intermediate portion has an elliptical cross-section. The front portion has a substantially flat front end. The exterior surface of the intermediate portion has a 16 portion of its surface that is substantially planar thereby making the intermediate 17 portion roughly D-shaped in cross section. A groove is disposed along the planar 18 surface, the groove being perpendicular to a longitudinal axis passing through the 19 center of the front, intermediate and rear portions. Preferably, the groove is rectangular in cross-section.
21 The assembly also comprises a tooth having a front tip portion adapted for 22 excavating and an enlarged rear portion extending from the front end. The enlarged 23 rear portion comprises a top surface and a socket configured to accommodate the 24 front and intermediate portions of the adaptor in a coupled position.
Specifically, the 4 {E5098882.DOC;1 }
1 socket has an opening adapted to mate with the base of the intermediate portion and a 2 bottom with a flat surface to mate with the front portion. The socket has an interior 3 wall surface that is initially cylindrical at the entrance and then tapers to the bottom, 4 the interior wall surface having a portion that is planar such that it mates with the exterior surface of the intermediate portion of the adaptor. The enlarged rear portion 6 of the tooth also has an opening, which is offset to one side on the top surface. The 7 opening is in alignment with the adaptor groove when the tooth is fully seated on the 8 adaptor thereby defining a passageway that extends from the top surface and 9 terminates within the entrance of the tooth socket. A retainer pin inserted into the passageway and driven downwardly towards a "home" latched position secures the 11 tooth on the adaptor. The retainer pin can be removed by urging it upwardly out of 12 the passageway.
13 Accordingly, the present invention relates to an assembly of three interlocking 14 components - a tooth, an adaptor and retainer pin. The present invention may be characterized by the elements as set forth below.
16 In one embodiment, the present invention utilizes an offset, substantially 17 vertical retainer pin whereby installation and removal of the retainer pin is performed 18 from the top surface of the tooth. There is no bottom through-hole necessary in the 19 bottom of the tooth to "drift" the retainer pin out in order to disassemble the tooth from the adaptor. This design prevents entry of highly pressurized compaction forces 21 from beneath that can force the typical base exposed retainer pins) upward and out of 22 their latched position.
23 In another embodiment, the present invention provides an enclosed assembly 24 comprising three components including a tooth, an adaptor and a retainer pin. The 5 {E5098882.DOC;1 }
1 components are configured in such a way that the mated surfaces of the assembled 2 components minimize debris from entering certain areas of the coupled and latched 3 tooth and adaptor assembly. In another representative embodiment, the retainer pin 4 has an enlarged head with a bottom surface having a beveled seating collar completely around and beneath the head. The head is adapted to cover the entirety of 6 the retainer pin opening and to mate with the tooth top surface so as to prevent debris 7 from entering the passageway. The head of the retainer pin does have some exposure 8 to falling excavated debris that can assist in maintaining the retainer pin in its "home"
9 latched position.
In another representative embodiment, the adaptor front portion has a 11 rectangular front end and enlarges in cross-section towards the substantially circular 12 base of the intermediate portion. The intermediate portion incorporates a 3/a round 13 cylindrical shank having a flat side surface containing the groove, which is formed 14 thereon. The front and intermediate portions are adapted to conform to an interior configuration of the tooth socket so as to prevent the tooth from rotating on the 16 adaptor in the coupled position. Accordingly, the tooth remains stable on the adaptor 17 while the maintenance worker is performing the tooth change-out. The possibility of 18 the unlatched tooth sliding off the adaptor is virtually eliminated and this makes for 19 safer working conditions.
In view of the complementary shapes of the front and intermediate portions of 21 the adaptor and the tooth socket, the shock and bearing loads are more effectively 22 distributed throughout the assembly. The front and intermediate porrions form multi-23 directional load-bearing surfaces so as to reduce the possibility of tooth and/or adaptor 24 nose breakage. The cylindrical shank also complements the overall load carrying 6 {E5098882.DOC;1 l 1 capabilities of the assembly and the physical mass of the shank more than 2 compensates for the loss of structural material given up to the groove that forms the 3 passageway for the retainer pin.
4 The tooth and adaptor assembly of the present invention provides additional thrust-load bearing capacity with respect to forward directional movement of the 6 assembly mounted on the excavation bucket and/or equipment. In particular, the 7 present invention minimizes the amount of displacement that can occur between the 8 tooth and the adaptor thereby reducing undesirable movement of the retainer pin 9 within the passageway.
It is an object of the present invention to provide a tooth and adaptor assembly 11 for a dipper bucket that is easily serviced. The tooth and adaptor assembly may be 12 disassembled and reassembled with ease, without the need for excessive force applied 13 by sledgehammers or the like. The retainer pin may be moderately tapped into the 14 passageway formed when the tooth is fully seated on the adaptor to the "home"
latched position with an ordinary machine hammer. A typical pry bar, or a similar 16 tool, can easily remove the retainer lock-pin from its "home" latched position. One of 17 the advantages of the retainer pin of the present invention is that it is not dependent on 18 an elastomeric material to support its primary function of keeping latched and 19 maintaining the coupled position of the tooth on the adaptor. Accordingly, the retainer pin may be reused over the course of several tooth change outs, if necessary.
21 Broadly stated, one aspect of the present invention is a tooth and adaptor 22 assembly for a dipper bucket, comprising: an adaptor comprising a rear portion 23 adapted for attaching to a dipper bucket, a front portion having a substantially flat 24 front end, and a tapered intermediate portion having an exterior surface and a 7 ;E5098882.DOC;1 }
1 substantially circular base adjacent to said rear portion, said intermediate portion 2 narrowing in cross-sectional area towards said front portion, said intermediate portion 3 further comprising a substantially planar surface on a portion of its exterior surface 4 and a groove traversing said planar surface, said groove substantially perpendicular to a longitudinal axis passing through the center of said front, intermediate and rear 6 portions; a tooth having a front tip portion adapted for excavating and an enlarged rear 7 portion having a top surface, said enlarged rear portion forming a socket adapted to 8 complement said front and intermediate portions of said adaptor, said socket having 9 an entrance that is substantially circular to mate with the base of said intermediate portion, a bottom with a substantially flat surface to mate with the flat front end of 11 said front portion and a tapered interior wall surface narrowing from said entrance to 12 said bottom, a portion of said interior wall surface being substantially planar to mate 13 with the planar surface portion of said intermediate portion whereby said tooth fits 14 securely on said adaptor and engages substantially the entire outer surface of said front and intermediate portions of said adaptor, said tooth further comprising an 16 opening on said enlarged rear portion that substantially aligns with said groove to 17 define a passageway when said tooth is substantially engaged with said adaptor; and a 18 retainer pin adapted to be inserted through said opening into said passageway to 19 secure said tooth to said adaptor.
Other objects, features and advantages of the present invention will become 21 clear from the following detailed description, when read in association with the 22 drawings and the appended claims.
8 {E5098882.DOC;1 }
2 Figure 1 is a perspective view of an embodiment of the present invention 3 showing the tooth uncoupled from the adaptor that is mounted to a dipper bucket.
4 Figure 2 is a perspective view of an embodiment of the present invention showing the tooth being seated on the adaptor and secured with the retainer pin.
6 Figure 3 is a side elevational view of an embodiment of the present invention 7 showing the tooth coupled to the adaptor and secured with the retainer pin.
8 Figure 4 is a top plan view of an embodiment of the present invention showing 9 the tooth coupled to the adaptor and secured with the retainer pin.
Figure 5 is a side elevational view of an embodiment of the present invention 11 showing the tooth and the adaptor in an uncoupled position.
12 Figure 6 is a top plan view of an embodiment of the present invention showing 13 the tooth and the adaptor in an uncoupled position.
14 Figure 7 is a side elevational cross-section view of the tooth in accordance with an embodiment of the present invention shown along sections lines A-A.
16 Figure 8 is a side elevational cross-section view of the tooth in accordance 17 with an embodiment of the present invention shown along section lines B-B.
18 Figure 9 is a top plan cross-sectional view of the tooth in accordance with an 19 embodiment of the present invention shown along section lines C-C.
Figure 10 is a side elevational view of the adaptor in accordance with an 21 embodiment of the present invention.
22 Figure 11 is a top plan view of the adaptor in accordance with an embodiment 23 of the present invention.
9 ~ESOV8s8z.DOC;r y 1 Figure 12 is a front elevational view of the retainer pin in accordance with an 2 embodiment of the present invention.
3 Figure 13 is a right side elevational view of the retainer pin in accordance with 4 an embodiment of the present invention.
Figure 14 is front elevational cross-section view of an embodiment of the 6 present invention shown along section lines D-D.
7 Figure 15 a front elevational cross-section view of the retainer pin in 8 accordance with an embodiment of the present invention as shown within section line 9 E.
DETAILED DESCRIPTION OF THE INVENTION
11 Refernng to Figures 1 and 2, a representative embodiment of the present 12 invention is shown. Tooth/adaptor assembly 10 broadly consists of excavation tooth 13 12, adaptor 14 and retainer pin 16. Adaptor 14 comprises an elongated U-shaped 14 member that attaches to dipper bucket 18 on bucket lip 19 as well known to those skilled in the art. Tooth 12 is seated onto adaptor 14 and secured by retainer pin 16 16 that is inserted through opening 20 to fit snugly into groove 22. Tooth 12 is designed 17 to bear the brunt of the wearing forces caused by excavating and will wear out over 18 time. As tooth 12 wears out to the point that it is no longer serviceable, tooth 12 can 19 be removed from adaptor 14 by extracting retainer pin 16 from opening 20 and sliding tooth 12 off of adaptor 14 so that a new tooth 12 may be installed.
21 Referring to Figures 3 and 4, side and top views of assembly 10 is shown with 22 tooth 12 fully seated on adaptor 14. Tooth 12 has a pointed tip 24 designed for 23 excavating is shown secured to adaptor 14 with retainer pin 16 seated in opening 20.
24 In a preferred embodiment, tooth 12 comprises a raised deflector 26 that is positioned 10 {E5098882.DOC;1 }
1 at least partially around opening 20. Deflector 26 is, preferably, L-shaped and acts to 2 prevent debris from thrusting directly against the top of retainer pin 16 during 3 excavation operations.
4 Refernng to Figures 5 and 6, side and top views of assembly 10 is shown with tooth 12 uncoupled from adaptor 14. Adaptor 14 comprises base portion 28 that is 6 generally circular in cross-section, intermediate elliptical tapered cone portion 38 and 7 front block portion 59. Disposed on a side of base and intermediate portions 28 and 8 38 is flat surface 32 that gives base portion 28 and intermediate portion 38 a generally 9 D-shaped or 3/4 round cross-section. Flat surface 32 has a planar axis that is tilted off vertical as it slopes inwardly from top to bottom on adaptor 14. Traversing across flat 11 surface 32 is groove 22 that is, preferably, substantially perpendicular to longitudinal 12 axis 11 of assembly 10. To couple tooth 12 and adaptor 14 together, tooth 13 comprises socket 34 that receives front, intermediate and base portions 59, 38 and 28 14 of adaptor 14. When tooth 12 is seated on adaptor 14, thrust bearing surface 36 of tooth 12 contacts thrust bearing surface 30 of adaptor 14. Load forces passing from 16 adaptor 14 to tooth 12 and from tooth 12 back to adaptor 14 are transmitted via these 17 uniform mated fit surfaces. Furthermore, when tooth 12 is seated on adaptor 14, 18 opening 20 aligns with groove 22 to provide a substantially continuous passageway 19 21 for receiving retainer pin 16.
In Figures 7 and 8, side cross-sectional views of tooth 12 are shown. Figure 9 21 illustrates a top plan cross-sectional view of tooth 12. Tooth 12 comprises socket-22 opening 34 that has a substantially circular interior load bearing surface 40 to match 23 base 28 of adaptor 14. Transition cavity 46 is a relief groove that separates load 24 surface 40 from elliptical cone surface 42. Transition cavity 44 is another relief 11 {E5098882.DOC;1 }
1 groove that separates elliptical cone surface 42 from block sidewalls SOa to SOd.
2 Relief cavities 44 and 46 are relatively rectangular in shape and offers additional 3 relief clearance for adaptor transition zone edges 37 and 39 on tooth 12 when it is 4 fully seated on adaptor 14.
Refernng to Figure 9, sidewalls SOa to SOd and primary thrust bearing surface 6 48 provide an opening to receive front block 59 of adaptor 14 in a sliding fit.
7 Preferably, front block 59 and the opening defined by sidewalls SOa to SOd are 8 rectangular. Cone surface 42 and circular base 40 further comprises flat surface 52 9 that gives this intermediate portion of socket 34 a generally D-shaped or '/4 round cross-section. Groove 54 traverses planar surface 52 and is generally perpendicular to 11 the horizontal axis of tooth 12. Groove 54 comprises sidewalk SSa to SSc and aligns 12 with groove 22 on tooth 12 to provide the substantially continuous passageway 21 for 13 receiving retainer pin 16. Sidewall SSa serves as a flat bearing surface to accept 14 moderate thrust loads from retainer pin 16 during excavation operations. At the bottom of groove 54 is mitre surface 56 that marks the end of passageway 21.
In a 16 representative embodiment of the present invention, passageway 21 is rectangular in 17 cross-section.
18 Referring to Figures 10 and 11, side and top views of adaptor 14 are shown, 19 respectively. Adaptor 14 comprises of adaptor base 28, which is generally circular, elliptical body 38 and front block 59. Front block 59 is, preferably, rectangular and 21 comprises of sidewalls 60a to 60d and primary thrust surface 58. Elliptical body 38 22 tapers from transition 37 to transition 39. Offset flat surface 32 is disposed on 23 elliptical body 38 and adaptor base 28. Groove 22 is disposed on flat surface 32 and 24 is generally perpendicular to the horizontal axis of adaptor 14. Groove 22 aligns with 12 {E5098882.DOC;1}
1 groove 54 of tooth 12 when tooth 12 is fully seated onto adaptor 14. Front block 59 is 2 adapted for a sliding fit with the bottom of socket 34 which is defined by sidewalls 3 SOa to SOd and thrust bearing surface 48. Preferably, adaptor front block 59 has a 4 generally rectangular cross section, with flat front mating surface 58 having a width that is greater than its height, that is, top and bottom mating surfaces 60a and 60c 6 wider than flat side mating surfaces 60b and 60d.
7 Front and side views of retainer pin 16 are shown in Figures 12 and 13.
8 Retainer pin 16 comprises sidewalk 64a to 64d, bottom mitre surface 68, pin head 62 9 and lift lug 66. In a representative embodiment, pin head 16 has a bottom surface adapted to cover the entirety of opening 20 and mate with the top surface of tooth 12 11 so as to prevent debris from entering passageway 21. In a representative embodiment, 12 pin head 62 further comprises of bevelled edges 76 that uniformly mate with the 13 edges of opening 20. This uniform metal-to-metal surface contact is maintained by 14 the downward magnetic pull, as described below, that encloses passageway 21 and the interior of assembly 10. Positioned on bottom surface 68 is magnet 70. Magnet 16 urges retainer pin 16 into passageway 21 as magnet 70 is attracted to groove bottom 17 surface 56. To further keep retainer pin 16 within passageway 21, sidewall 64d 18 further comprises spring-loaded plunger 72 that latches into complementary recess 78 19 in passageway 21. In a representative embodiment of the present invention, plunger 72 is a setscrew. Lubrication holes 74 disposed transversely through the body of 21 retainer pin 16 retain lubricant that reduces wear from potential thrust loads applied to 22 retainer pin 16 during excavation operations. To remove retainer pin 16 from 23 passageway 21, a pry bar or tool is used to pry up on lift lug 66 on pin head 62.
13 {E5098882.DOC;1 f 1 Retainer pin 16 is of a rigid construction and may be manufactured from steel or 2 alloys having suitable strength and wear properties.
3 In Figures 14 and 15, front cross-sectional views of assembly 10 are shown.
4 When retainer pin 16 is inserted into passageway 21, plunger 72 compresses into the body of retainer pin 16 and bottom surface 68 and magnet 70 contact bottom surface 6 56 in socket 34. Once retainer pin 16 is fully inserted into passageway, plunger 72 7 extends into recess 78 defined by the transition between adaptor base 28 and load 8 bearing surface 40 of tooth 12. Accordingly, retainer pin 16 is held in position by 9 magnet 70 contacting bottom surface 56 and plunger 72 extending into recess 78. The downward magnetic pull derived from magnet 70 assists in keeping retaining pin 11 fully seated and stabilized in passageway 21. Retainer pin 16 is marginally smaller 12 than opening 20 and is readily received in sliding fit within passageway 21.
13 Passageway 21 permits full insertion of retainer pin 16 therein and bottom mitre 14 surface 68 bottoms out on groove bottom surface 56. All internal surfaces of passageway 21 can transfer varying thrust loads via retainer lock pin external 16 sidewalls 64a to 64d while retainer pin 16 securely maintains the fully coupled 17 position of tooth 12 on adaptor 14 during excavation operations.
18 Although a few preferred embodiments have been shown and described, it will 19 be appreciated by those skilled in the art that various changes and modifications might be made without departing from the scope of the invention. The terms and 21 expressions used in the preceding specification have been used herein as terms of 22 description and not of limitation, and there is no intention in the use of such terms and 23 expressions of excluding equivalents of the features shown and described or portions 14 {E5098882.DOC;1 }
In another representative embodiment, the adaptor front portion has a 11 rectangular front end and enlarges in cross-section towards the substantially circular 12 base of the intermediate portion. The intermediate portion incorporates a 3/a round 13 cylindrical shank having a flat side surface containing the groove, which is formed 14 thereon. The front and intermediate portions are adapted to conform to an interior configuration of the tooth socket so as to prevent the tooth from rotating on the 16 adaptor in the coupled position. Accordingly, the tooth remains stable on the adaptor 17 while the maintenance worker is performing the tooth change-out. The possibility of 18 the unlatched tooth sliding off the adaptor is virtually eliminated and this makes for 19 safer working conditions.
In view of the complementary shapes of the front and intermediate portions of 21 the adaptor and the tooth socket, the shock and bearing loads are more effectively 22 distributed throughout the assembly. The front and intermediate porrions form multi-23 directional load-bearing surfaces so as to reduce the possibility of tooth and/or adaptor 24 nose breakage. The cylindrical shank also complements the overall load carrying 6 {E5098882.DOC;1 l 1 capabilities of the assembly and the physical mass of the shank more than 2 compensates for the loss of structural material given up to the groove that forms the 3 passageway for the retainer pin.
4 The tooth and adaptor assembly of the present invention provides additional thrust-load bearing capacity with respect to forward directional movement of the 6 assembly mounted on the excavation bucket and/or equipment. In particular, the 7 present invention minimizes the amount of displacement that can occur between the 8 tooth and the adaptor thereby reducing undesirable movement of the retainer pin 9 within the passageway.
It is an object of the present invention to provide a tooth and adaptor assembly 11 for a dipper bucket that is easily serviced. The tooth and adaptor assembly may be 12 disassembled and reassembled with ease, without the need for excessive force applied 13 by sledgehammers or the like. The retainer pin may be moderately tapped into the 14 passageway formed when the tooth is fully seated on the adaptor to the "home"
latched position with an ordinary machine hammer. A typical pry bar, or a similar 16 tool, can easily remove the retainer lock-pin from its "home" latched position. One of 17 the advantages of the retainer pin of the present invention is that it is not dependent on 18 an elastomeric material to support its primary function of keeping latched and 19 maintaining the coupled position of the tooth on the adaptor. Accordingly, the retainer pin may be reused over the course of several tooth change outs, if necessary.
21 Broadly stated, one aspect of the present invention is a tooth and adaptor 22 assembly for a dipper bucket, comprising: an adaptor comprising a rear portion 23 adapted for attaching to a dipper bucket, a front portion having a substantially flat 24 front end, and a tapered intermediate portion having an exterior surface and a 7 ;E5098882.DOC;1 }
1 substantially circular base adjacent to said rear portion, said intermediate portion 2 narrowing in cross-sectional area towards said front portion, said intermediate portion 3 further comprising a substantially planar surface on a portion of its exterior surface 4 and a groove traversing said planar surface, said groove substantially perpendicular to a longitudinal axis passing through the center of said front, intermediate and rear 6 portions; a tooth having a front tip portion adapted for excavating and an enlarged rear 7 portion having a top surface, said enlarged rear portion forming a socket adapted to 8 complement said front and intermediate portions of said adaptor, said socket having 9 an entrance that is substantially circular to mate with the base of said intermediate portion, a bottom with a substantially flat surface to mate with the flat front end of 11 said front portion and a tapered interior wall surface narrowing from said entrance to 12 said bottom, a portion of said interior wall surface being substantially planar to mate 13 with the planar surface portion of said intermediate portion whereby said tooth fits 14 securely on said adaptor and engages substantially the entire outer surface of said front and intermediate portions of said adaptor, said tooth further comprising an 16 opening on said enlarged rear portion that substantially aligns with said groove to 17 define a passageway when said tooth is substantially engaged with said adaptor; and a 18 retainer pin adapted to be inserted through said opening into said passageway to 19 secure said tooth to said adaptor.
Other objects, features and advantages of the present invention will become 21 clear from the following detailed description, when read in association with the 22 drawings and the appended claims.
8 {E5098882.DOC;1 }
2 Figure 1 is a perspective view of an embodiment of the present invention 3 showing the tooth uncoupled from the adaptor that is mounted to a dipper bucket.
4 Figure 2 is a perspective view of an embodiment of the present invention showing the tooth being seated on the adaptor and secured with the retainer pin.
6 Figure 3 is a side elevational view of an embodiment of the present invention 7 showing the tooth coupled to the adaptor and secured with the retainer pin.
8 Figure 4 is a top plan view of an embodiment of the present invention showing 9 the tooth coupled to the adaptor and secured with the retainer pin.
Figure 5 is a side elevational view of an embodiment of the present invention 11 showing the tooth and the adaptor in an uncoupled position.
12 Figure 6 is a top plan view of an embodiment of the present invention showing 13 the tooth and the adaptor in an uncoupled position.
14 Figure 7 is a side elevational cross-section view of the tooth in accordance with an embodiment of the present invention shown along sections lines A-A.
16 Figure 8 is a side elevational cross-section view of the tooth in accordance 17 with an embodiment of the present invention shown along section lines B-B.
18 Figure 9 is a top plan cross-sectional view of the tooth in accordance with an 19 embodiment of the present invention shown along section lines C-C.
Figure 10 is a side elevational view of the adaptor in accordance with an 21 embodiment of the present invention.
22 Figure 11 is a top plan view of the adaptor in accordance with an embodiment 23 of the present invention.
9 ~ESOV8s8z.DOC;r y 1 Figure 12 is a front elevational view of the retainer pin in accordance with an 2 embodiment of the present invention.
3 Figure 13 is a right side elevational view of the retainer pin in accordance with 4 an embodiment of the present invention.
Figure 14 is front elevational cross-section view of an embodiment of the 6 present invention shown along section lines D-D.
7 Figure 15 a front elevational cross-section view of the retainer pin in 8 accordance with an embodiment of the present invention as shown within section line 9 E.
DETAILED DESCRIPTION OF THE INVENTION
11 Refernng to Figures 1 and 2, a representative embodiment of the present 12 invention is shown. Tooth/adaptor assembly 10 broadly consists of excavation tooth 13 12, adaptor 14 and retainer pin 16. Adaptor 14 comprises an elongated U-shaped 14 member that attaches to dipper bucket 18 on bucket lip 19 as well known to those skilled in the art. Tooth 12 is seated onto adaptor 14 and secured by retainer pin 16 16 that is inserted through opening 20 to fit snugly into groove 22. Tooth 12 is designed 17 to bear the brunt of the wearing forces caused by excavating and will wear out over 18 time. As tooth 12 wears out to the point that it is no longer serviceable, tooth 12 can 19 be removed from adaptor 14 by extracting retainer pin 16 from opening 20 and sliding tooth 12 off of adaptor 14 so that a new tooth 12 may be installed.
21 Referring to Figures 3 and 4, side and top views of assembly 10 is shown with 22 tooth 12 fully seated on adaptor 14. Tooth 12 has a pointed tip 24 designed for 23 excavating is shown secured to adaptor 14 with retainer pin 16 seated in opening 20.
24 In a preferred embodiment, tooth 12 comprises a raised deflector 26 that is positioned 10 {E5098882.DOC;1 }
1 at least partially around opening 20. Deflector 26 is, preferably, L-shaped and acts to 2 prevent debris from thrusting directly against the top of retainer pin 16 during 3 excavation operations.
4 Refernng to Figures 5 and 6, side and top views of assembly 10 is shown with tooth 12 uncoupled from adaptor 14. Adaptor 14 comprises base portion 28 that is 6 generally circular in cross-section, intermediate elliptical tapered cone portion 38 and 7 front block portion 59. Disposed on a side of base and intermediate portions 28 and 8 38 is flat surface 32 that gives base portion 28 and intermediate portion 38 a generally 9 D-shaped or 3/4 round cross-section. Flat surface 32 has a planar axis that is tilted off vertical as it slopes inwardly from top to bottom on adaptor 14. Traversing across flat 11 surface 32 is groove 22 that is, preferably, substantially perpendicular to longitudinal 12 axis 11 of assembly 10. To couple tooth 12 and adaptor 14 together, tooth 13 comprises socket 34 that receives front, intermediate and base portions 59, 38 and 28 14 of adaptor 14. When tooth 12 is seated on adaptor 14, thrust bearing surface 36 of tooth 12 contacts thrust bearing surface 30 of adaptor 14. Load forces passing from 16 adaptor 14 to tooth 12 and from tooth 12 back to adaptor 14 are transmitted via these 17 uniform mated fit surfaces. Furthermore, when tooth 12 is seated on adaptor 14, 18 opening 20 aligns with groove 22 to provide a substantially continuous passageway 19 21 for receiving retainer pin 16.
In Figures 7 and 8, side cross-sectional views of tooth 12 are shown. Figure 9 21 illustrates a top plan cross-sectional view of tooth 12. Tooth 12 comprises socket-22 opening 34 that has a substantially circular interior load bearing surface 40 to match 23 base 28 of adaptor 14. Transition cavity 46 is a relief groove that separates load 24 surface 40 from elliptical cone surface 42. Transition cavity 44 is another relief 11 {E5098882.DOC;1 }
1 groove that separates elliptical cone surface 42 from block sidewalls SOa to SOd.
2 Relief cavities 44 and 46 are relatively rectangular in shape and offers additional 3 relief clearance for adaptor transition zone edges 37 and 39 on tooth 12 when it is 4 fully seated on adaptor 14.
Refernng to Figure 9, sidewalls SOa to SOd and primary thrust bearing surface 6 48 provide an opening to receive front block 59 of adaptor 14 in a sliding fit.
7 Preferably, front block 59 and the opening defined by sidewalls SOa to SOd are 8 rectangular. Cone surface 42 and circular base 40 further comprises flat surface 52 9 that gives this intermediate portion of socket 34 a generally D-shaped or '/4 round cross-section. Groove 54 traverses planar surface 52 and is generally perpendicular to 11 the horizontal axis of tooth 12. Groove 54 comprises sidewalk SSa to SSc and aligns 12 with groove 22 on tooth 12 to provide the substantially continuous passageway 21 for 13 receiving retainer pin 16. Sidewall SSa serves as a flat bearing surface to accept 14 moderate thrust loads from retainer pin 16 during excavation operations. At the bottom of groove 54 is mitre surface 56 that marks the end of passageway 21.
In a 16 representative embodiment of the present invention, passageway 21 is rectangular in 17 cross-section.
18 Referring to Figures 10 and 11, side and top views of adaptor 14 are shown, 19 respectively. Adaptor 14 comprises of adaptor base 28, which is generally circular, elliptical body 38 and front block 59. Front block 59 is, preferably, rectangular and 21 comprises of sidewalls 60a to 60d and primary thrust surface 58. Elliptical body 38 22 tapers from transition 37 to transition 39. Offset flat surface 32 is disposed on 23 elliptical body 38 and adaptor base 28. Groove 22 is disposed on flat surface 32 and 24 is generally perpendicular to the horizontal axis of adaptor 14. Groove 22 aligns with 12 {E5098882.DOC;1}
1 groove 54 of tooth 12 when tooth 12 is fully seated onto adaptor 14. Front block 59 is 2 adapted for a sliding fit with the bottom of socket 34 which is defined by sidewalls 3 SOa to SOd and thrust bearing surface 48. Preferably, adaptor front block 59 has a 4 generally rectangular cross section, with flat front mating surface 58 having a width that is greater than its height, that is, top and bottom mating surfaces 60a and 60c 6 wider than flat side mating surfaces 60b and 60d.
7 Front and side views of retainer pin 16 are shown in Figures 12 and 13.
8 Retainer pin 16 comprises sidewalk 64a to 64d, bottom mitre surface 68, pin head 62 9 and lift lug 66. In a representative embodiment, pin head 16 has a bottom surface adapted to cover the entirety of opening 20 and mate with the top surface of tooth 12 11 so as to prevent debris from entering passageway 21. In a representative embodiment, 12 pin head 62 further comprises of bevelled edges 76 that uniformly mate with the 13 edges of opening 20. This uniform metal-to-metal surface contact is maintained by 14 the downward magnetic pull, as described below, that encloses passageway 21 and the interior of assembly 10. Positioned on bottom surface 68 is magnet 70. Magnet 16 urges retainer pin 16 into passageway 21 as magnet 70 is attracted to groove bottom 17 surface 56. To further keep retainer pin 16 within passageway 21, sidewall 64d 18 further comprises spring-loaded plunger 72 that latches into complementary recess 78 19 in passageway 21. In a representative embodiment of the present invention, plunger 72 is a setscrew. Lubrication holes 74 disposed transversely through the body of 21 retainer pin 16 retain lubricant that reduces wear from potential thrust loads applied to 22 retainer pin 16 during excavation operations. To remove retainer pin 16 from 23 passageway 21, a pry bar or tool is used to pry up on lift lug 66 on pin head 62.
13 {E5098882.DOC;1 f 1 Retainer pin 16 is of a rigid construction and may be manufactured from steel or 2 alloys having suitable strength and wear properties.
3 In Figures 14 and 15, front cross-sectional views of assembly 10 are shown.
4 When retainer pin 16 is inserted into passageway 21, plunger 72 compresses into the body of retainer pin 16 and bottom surface 68 and magnet 70 contact bottom surface 6 56 in socket 34. Once retainer pin 16 is fully inserted into passageway, plunger 72 7 extends into recess 78 defined by the transition between adaptor base 28 and load 8 bearing surface 40 of tooth 12. Accordingly, retainer pin 16 is held in position by 9 magnet 70 contacting bottom surface 56 and plunger 72 extending into recess 78. The downward magnetic pull derived from magnet 70 assists in keeping retaining pin 11 fully seated and stabilized in passageway 21. Retainer pin 16 is marginally smaller 12 than opening 20 and is readily received in sliding fit within passageway 21.
13 Passageway 21 permits full insertion of retainer pin 16 therein and bottom mitre 14 surface 68 bottoms out on groove bottom surface 56. All internal surfaces of passageway 21 can transfer varying thrust loads via retainer lock pin external 16 sidewalls 64a to 64d while retainer pin 16 securely maintains the fully coupled 17 position of tooth 12 on adaptor 14 during excavation operations.
18 Although a few preferred embodiments have been shown and described, it will 19 be appreciated by those skilled in the art that various changes and modifications might be made without departing from the scope of the invention. The terms and 21 expressions used in the preceding specification have been used herein as terms of 22 description and not of limitation, and there is no intention in the use of such terms and 23 expressions of excluding equivalents of the features shown and described or portions 14 {E5098882.DOC;1 }
Claims (10)
1. A tooth and adaptor assembly for a dipper bucket, comprising:
a) an adaptor comprising:
i) a rear portion adapted for attaching to a dipper bucket, ii) a front portion having a substantially flat front end, and iii) a tapered intermediate portion having an exterior surface and a substantially circular base adjacent to said rear portion, said intermediate portion narrowing in cross-sectional area towards said front portion, said intermediate portion further comprising a substantially planar surface on a portion of its exterior surface and a groove traversing said planar surface, said groove substantially perpendicular to a longitudinal axis passing through the center of said front, intermediate and rear portions;
b) a tooth having a front tip portion adapted for excavating and an enlarged rear portion having a top surface, said enlarged rear portion forming a socket adapted to complement said front and intermediate portions of said adaptor, said socket having an entrance that is substantially circular to mate with the base of said intermediate portion, a bottom with a substantially flat surface to mate with the flat front end of said front portion and a tapered interior wall surface narrowing from said entrance to said bottom, a portion of said interior wall surface being substantially planar to mate with the planar surface portion of said intermediate portion whereby said tooth fits securely on said adaptor and engages substantially the entire outer surface of said front and intermediate portions of said adaptor, said tooth further comprising an opening on said enlarged rear portion that substantially aligns with said groove to define a passageway when said tooth is substantially engaged with said adaptor; and c) a retainer pin adapted to be inserted through said opening into said passageway to secure said tooth to said adaptor.
a) an adaptor comprising:
i) a rear portion adapted for attaching to a dipper bucket, ii) a front portion having a substantially flat front end, and iii) a tapered intermediate portion having an exterior surface and a substantially circular base adjacent to said rear portion, said intermediate portion narrowing in cross-sectional area towards said front portion, said intermediate portion further comprising a substantially planar surface on a portion of its exterior surface and a groove traversing said planar surface, said groove substantially perpendicular to a longitudinal axis passing through the center of said front, intermediate and rear portions;
b) a tooth having a front tip portion adapted for excavating and an enlarged rear portion having a top surface, said enlarged rear portion forming a socket adapted to complement said front and intermediate portions of said adaptor, said socket having an entrance that is substantially circular to mate with the base of said intermediate portion, a bottom with a substantially flat surface to mate with the flat front end of said front portion and a tapered interior wall surface narrowing from said entrance to said bottom, a portion of said interior wall surface being substantially planar to mate with the planar surface portion of said intermediate portion whereby said tooth fits securely on said adaptor and engages substantially the entire outer surface of said front and intermediate portions of said adaptor, said tooth further comprising an opening on said enlarged rear portion that substantially aligns with said groove to define a passageway when said tooth is substantially engaged with said adaptor; and c) a retainer pin adapted to be inserted through said opening into said passageway to secure said tooth to said adaptor.
2. The assembly as set forth in Claim 1 wherein said bottom of said socket and said front portion of said adaptor are rectangular in cross-section and are adapted to couple together in sliding fit.
3. The assembly as set forth in Claim 1 wherein said enlarged rear portion of said tooth further comprises a raised deflector extending around at least a portion of said opening for deflecting debris away from said passageway and retainer pin.
4. The assembly as set forth in Claim 1 wherein said planar surface portion of said intermediate portion is offset from a vertical axis sloping inwardly from top to bottom on said intermediate portion.
5. The assembly as set forth in Claim 4 wherein said retainer pin comprises a body conforming to the shape of said passageway and an enlarged head with a bottom surface adapted to cover said opening and mate with said top surface so as to prevent debris from entering said passageway.
6. The assembly as set forth in Claim 5 wherein said retainer pin further comprises a biasing element that compresses into said retainer pin as it is driven into said passageway, said biasing element extending outwardly into a complementary recess when said retainer pin is fully inserted in said passageway.
7. The assembly as set forth in Claim 6 wherein said retainer pin further comprises a magnet to urge said retainer pin downwardly in a latched position within said passageway.
8. The assembly as set forth in Claim 5 wherein said retainer pin further comprises a prying element on said enlarged head for prying said retainer pin out of said passageway.
9. The assembly as set forth in Claim 5 wherein said retainer pin further comprises at least one hole disposed through said body for containing a lubricant.
10. The assembly as set forth in Claims 1 wherein said passageway is rectangular in cross section and is further configured to receive said retainer pin therein.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002523513A CA2523513A1 (en) | 2005-10-14 | 2005-10-14 | Tooth and adaptor assembly for a dipper bucket |
| US11/278,163 US20070084094A1 (en) | 2005-10-14 | 2006-03-31 | Tooth and adaptor assembly for a dipper bucket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002523513A CA2523513A1 (en) | 2005-10-14 | 2005-10-14 | Tooth and adaptor assembly for a dipper bucket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2523513A1 true CA2523513A1 (en) | 2007-04-14 |
Family
ID=37913461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002523513A Abandoned CA2523513A1 (en) | 2005-10-14 | 2005-10-14 | Tooth and adaptor assembly for a dipper bucket |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US20070084094A1 (en) |
| CA (1) | CA2523513A1 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1910324B (en) * | 2003-12-05 | 2010-06-02 | 梅塔罗格尼亚股份公司 | Wearing components and its part of machine capable of moving material such as soil and quarry stone |
| DE102006059894A1 (en) * | 2006-12-19 | 2008-06-26 | Terex Gmbh | Wear element and thus equipped component |
| WO2011088511A1 (en) | 2010-01-20 | 2011-07-28 | Bradken Resources Pty Limited | Excavation tooth assembly |
| CN102733446A (en) * | 2011-04-15 | 2012-10-17 | 斗山工程机械（中国）有限公司 | Digging bucket and bucket teeth thereof |
| EP2769027B8 (en) * | 2011-10-20 | 2019-06-19 | Arcosa, Inc. | Tooth assembly for excavating apparatus with rare earth material |
| US9175457B2 (en) * | 2013-03-15 | 2015-11-03 | Caterpillar Inc. | Retainer systems for ground engaging tools |
| US8950092B2 (en) * | 2013-03-15 | 2015-02-10 | Caterpillar Inc. | Retainer systems for ground engaging tools |
| US9260839B2 (en) * | 2013-08-01 | 2016-02-16 | Caterpillar Inc. | Ground engaging tool assembly |
| US20160105077A1 (en) * | 2014-10-08 | 2016-04-14 | Raleigh Stewart | Lawn Mower Emergency Generator |
| USD779566S1 (en) * | 2015-10-02 | 2017-02-21 | Pearson Engineering Limited | Plowing tine replacement section |
| EA039243B1 (en) * | 2016-02-08 | 2021-12-22 | ЭСКО ГРУП ЛЛСи | Wear assembly for earth working equipment |
| CN117646472A (en) * | 2024-01-29 | 2024-03-05 | 宁波禾顺新材料有限公司 | Bucket tooth fixing system and bucket tooth fixing method of single-lug structure |
Family Cites Families (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1990523A (en) * | 1932-06-09 | 1935-02-12 | Arthur M Buswell | Method of producing methane |
| US3685178A (en) * | 1970-07-10 | 1972-08-22 | Abex Corp | Dipper teeth |
| US3774324A (en) * | 1971-06-21 | 1973-11-27 | Abex Corp | Digger teeth |
| US4369854A (en) * | 1975-10-02 | 1983-01-25 | Butterworth Archibald J | Parking devices for vehicles |
| US6735890B2 (en) * | 2001-07-06 | 2004-05-18 | Esco Corporation | Wear assembly |
| US4329428A (en) * | 1980-01-31 | 1982-05-11 | United Gas Pipe Line Company | Methane production from and beneficiation of anaerobic digestion of plant material and organic waste |
| US4404760A (en) * | 1980-04-28 | 1983-09-20 | Esco Corporation | Excavating tooth |
| US4424064A (en) * | 1980-05-22 | 1984-01-03 | United Gas Pipe Line Company | Methane production from and beneficiation of anaerobic digestion of aquatic plant material |
| US4316961A (en) * | 1980-06-09 | 1982-02-23 | United Gas Pipe Line Company | Methane production by anaerobic digestion of plant material and organic waste |
| US4481728A (en) * | 1981-12-01 | 1984-11-13 | Abex Corporation | Dipper tooth tip and adapter |
| US4579562A (en) * | 1984-05-16 | 1986-04-01 | Institute Of Gas Technology | Thermochemical beneficiation of low rank coals |
| JPS61197096A (en) * | 1985-02-23 | 1986-09-01 | Shimizu Constr Co Ltd | Methane fermenting method of pulp paper making waste water |
| US5491915A (en) * | 1991-12-16 | 1996-02-20 | Robinson; Howard W. | Locking pin apparatus |
| US5177886A (en) * | 1992-03-16 | 1993-01-12 | Caterpillar Inc. | Tooth with clearances in socket |
| US5469648A (en) * | 1993-02-02 | 1995-11-28 | Esco Corporation | Excavating tooth |
| US6210955B1 (en) * | 1994-10-05 | 2001-04-03 | Gas Research Institute | Foam transport process for in-situ remediation of contaminated soils |
| US5561925A (en) * | 1995-07-25 | 1996-10-08 | Caterpillar Inc. | Tooth assembly and retaining mechanism |
| US5983534A (en) * | 1997-09-17 | 1999-11-16 | G. H. Hensley Industries, Inc. | Rotary lock system for excavating tooth/adapter assembly |
| US6151812A (en) * | 1997-10-30 | 2000-11-28 | Bierwith; Robert S. | Bucket assembly with an improved lip |
| CA2219036C (en) * | 1997-11-13 | 2001-09-04 | Quality Steel Foundries Ltd. | Coupling device for locking an excavation tooth onto an adaptor |
| FR2792343B1 (en) * | 1999-04-19 | 2001-06-22 | Charles Pasqualini | CONNECTION DEVICE BETWEEN WEAR PARTS AT THE END OF TOOLS AND RECEPTACLES FOR USE ON PUBLIC WORKS MACHINERY AND EQUIPMENT |
| US6725582B2 (en) * | 1999-06-10 | 2004-04-27 | Quality Steel Foundries Ltd. | Assembly for fastening a ground engaging tool to a support structure |
| US6543535B2 (en) * | 2000-03-15 | 2003-04-08 | Exxonmobil Upstream Research Company | Process for stimulating microbial activity in a hydrocarbon-bearing, subterranean formation |
| US20050053955A1 (en) * | 2001-04-20 | 2005-03-10 | Sowlay Mohankumar R. | Nucleic acid-based assay and kit for the detection of methanogens in biological samples |
| AUPR576701A0 (en) * | 2001-06-18 | 2001-07-12 | Keech Castings Australia Pty Limited | Locking assembly and method |
| US6668472B2 (en) * | 2001-07-16 | 2003-12-30 | Robert Bierwith | Wedge-locking system and excavation bucket assembly with wedge-locking system |
| US6796472B2 (en) * | 2001-12-19 | 2004-09-28 | William C. Miller | Automobile trunk compartmentalizer |
| FR2846017B1 (en) * | 2002-10-17 | 2005-02-11 | Afe Metal | DEVICE FOR CONNECTING COUPLING BETWEEN WEAR PARTS TO THE END OF TOOLS RECEPTACLES USED ON PUBLIC WORKS MACHINERY |
| US20050011089A1 (en) * | 2003-07-17 | 2005-01-20 | Alan Duke | Excavation tooth installation assembly and method |
| CA2501697C (en) * | 2004-04-23 | 2012-07-31 | Robert S. Bierwith | Lip assembly including side portions with projections |
-
2005
- 2005-10-14 CA CA002523513A patent/CA2523513A1/en not_active Abandoned
-
2006
- 2006-03-31 US US11/278,163 patent/US20070084094A1/en not_active Abandoned
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| US20070084094A1 (en) | 2007-04-19 |
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