US3812608A - Dipper bucket corner member with integral shroud - Google Patents
Dipper bucket corner member with integral shroud Download PDFInfo
- Publication number
- US3812608A US3812608A US00375431A US37543173A US3812608A US 3812608 A US3812608 A US 3812608A US 00375431 A US00375431 A US 00375431A US 37543173 A US37543173 A US 37543173A US 3812608 A US3812608 A US 3812608A
- Authority
- US
- United States
- Prior art keywords
- dipper
- lip
- tooth
- shroud
- corner
- 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 - Lifetime
Links
- 238000005304 joining Methods 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 description 8
- 238000005266 casting Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 241000602850 Cinclidae Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Images
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
- E02F9/2858—Teeth characterised by shape
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C27/00—Machines which completely free the mineral from the seam
- E21C27/20—Mineral freed by means not involving slitting
- E21C27/30—Mineral freed by means not involving slitting by jaws, buckets or scoops that scoop-out the mineral
Definitions
- each corner guard preferably includes an integral shroud embracing the portion of the digging edge of the lip which intervenes between the corner and the next adjacent dipper tooth, the latter being of any preferred form. Additionally the guard is so constructed as to present an extension at the rear thereof constituting a portion of the side wall of the dipper.
- This invention relates to the construction of excavating shovels or so-called dipper buckets of the kind used in large mining operations, the buckets sometimes being of ten cubic yard capacity or even larger.
- a characteristic feature of such a bucket is a lip at the front presenting a line of digger teeth at the digging edge.
- Power shovels or dippers are subjected to severe stresses and extensive metal wear due to the nature of their application. Metal wear is most pronounced at the dipper front or lip. This is the portion to which the dipper teeth and the door latch plate are attached. The most vulnerable area of wear on the front occurs at the corners of the cutting edge just beyond the end teeth and around the corner of the lip up into the forward edge of the sides of the lip. If wear is allowed to continue, the front may fail due to insufficient strength for withstanding the load of the dipper teeth. To overcome failures of this type, it is common practice to take the shovel out of service and deliver it to welders who rebuild the worn area with weld deposits. This is a costly precedure due to down time of the operation and the cost of repair, to say nothing of the lack of production during the time the shovel is out of operation.
- each corner guard has a top and bottom wall constituting an extension of the related side wall at the front of the lip, thereby to enable wear at the corners of the lip to be absorbed by the two replaceable corner guards.
- the ordinary teeth presented by the dipper lip are naturally spaced from one another. This spacing will prevail under the present invention, which is to say that the cutting edge of the lip of the digger is exposed in the area between each corner guard and the adjacent tooth of ordinary form.
- the exposed area of the lip of the dipper may be guarded by a lip shroud included as part of the replaceable comer guard.
- FIG. 1 is a fragmentary perspective view of the bucket of a power shovel
- FIG. 2 is a fragmentary side elevation'at the lip of the bucket, on an enlarged scale compared to FIG. 1;
- FIG. 3 is a fragmentary sectional view longitudinally of the tooth assembly shown in FIG. 2;
- FIG. 4 is a section similar to FIG. 3 on a reduced scale, showing the supporting member or boss for the corner tooth;
- FIGS. 5 and 6 are fragmentary sectional views substantially on the lines 5-5 and 66 of FIG. 2;
- FIG. 7 is a fragmentary front elevation at the corner of the lip of the bucket.
- FIG. 8 is a top plan view of a comer tooth under the present invention.
- FIG. 9 is a fragmentary top plan view of the bucket lip.
- FIG. 10 is a perspective of the tooth.
- FIG. 1 presents a fragmentary perspective view of the bucket of a power shovel, the bucket having a lip member 21 at the front thereof.
- the lip is an entire, integral casting including a bottom wall 22, a pair of side walls 23 and 24 extending normal to the bottom wall, and a forward cutting edge 25.
- a plurality of separate dipper teeth 30, in a line, are supported at the front of the lip and projecting forwardly-from the forward cutting edge.
- the dipper teeth are mounted on the lip in compliance with any preferred arrangement, constituting no part of the present invention, but it may be mentioned that the usual mode of construction is characterized by a replaceable cap or point removably secured to an adapter in turn secured to the cutting edge of the dipper lip whereby the tooth point may be reversed when one side is objectionably worn and whereby the entire tooth or cap may be replaced.
- a characteristic feature of the present invention is that the corner edges of the lip are in the form of corner teeth 35. While the guards are shown as teeth in this embodiment, it is apparent that the same protective function is accomplished whether the guard is passive as a shroud or active as a tooth. Moreover as the tooth extension wears down, the rounded off portion remaining acts as a protective shroud and prolongs the life of a tooth guard further. The reason for this is that in field operation it is found that the comers of the lip are severely .worn in those areas just beyond the-ends of the line or ordinary teeth 30. Thus, the corners of the lip where the side walls join the cutting edge, ordinarily receive the same abuse as the digger tooth. This can be readily visualized by referring to the bucket shown in United States Letters Patent No. 3,107,445 which has no protection at the comers of the lip.
- each side wall of the lip is formed with a forwardly projecting support or boss 40, FIGS. 2,3 and 4, integral with the rest of thelip casting.
- the boss presents upper and lower seating surfaces 41 and 42.
- each comer tooth itself, 35 is characterized by a pair of spaced upper and lower walls 44 and 45 defining a cavity or recess 46 substantially complementary to the boss 40 whereby the tooth 35 may be. mounted on the boss as shown in FIG. 3, with the opposed inner surfaces of the tooth walls 44 and 45 substantially in bearing engagement with the opposed seating surfaces 41 and 42 of the support boss 40.
- each support part 40 has a large aperture 47, FIG. 4, formed therein to extend between the seating surfaces 41 and 42.
- the walls 44 and 45 of the tooth part are provided with openings 48 and 49 which register with the aperture 47 when the two parts are associated, as shown in FIG. 3, allowing a C-clamp 51 and a wedge 52 to be placed therein and tightened whereby the fingers of the C-clamp engage the tooth whilst the wedge 52 is jammed between the long side of the C- clamp and the opposed front surface of the support aperture 47, rigidly securing the tooth to its support.
- the lip side wall 24, FIG. 1, is configured to present a forwardly facing shoulder 55.
- the upper wall 44'of the corner tooth includes an upwardly extending projection 56 at the aft end opposite the digging point 57 of the tooth and this projection presents a rearwardly facing wall 57 opposite the shoulder 55.
- the rear of the tooth in effect constitutes a portion of the dipper side wall.
- the opposed walls 55 and 57 limit the amount of creep of the tooth on the boss 40, and shoulder 55 serves as a shock absorbing abutment for the tooth as a whole.
- a tang 58 extends rearwardly from the projection 56 and tits in-a corresponding recess 59, FIG. 4, formed in the shoulder 55.
- the forwardmost end 40E of the boss 40 is narrowed and projects forwardly as shown in FIG. 7'so as to constitute a forward tang fitting a correspondingly narrowed and forwardly projecting recess 60 within the tooth, FIG. 8.
- Each corner tooth has an outer side 70 and an inner side 71, FIGS. 9 and 10.
- Each corner tooth at what constitutes the inner side thereof, is cast integrally with a rearwardly concaved shroud 65, FIGS. 8 and 10, generally C-shaped and openingrearwardly.
- This shroud is configured to embrace theportion'of the lip edge 25, FIG. 9, which intervenes between the corner tooth 35 and the next adjacent dipper tooth as 30A, thereby to protect the intervening lip edge against wear.
- the rear surface 73 of shroud 65 slopes forwardly proceeding laterally from the inner side of the tooth.
- thetop surface 75 of shroud 65 slopes downwardly proceeding laterally from the inner side of the tooth.
- the preferred form of the rear and top surfaces of the shroud is concaved so that any burden of earth from the top or rear of the tooth is sloughed off so that wedging or entrapment is reduced.
- the comers of a dipper lip where the sides meet the digging or cutting edge, are provided with integral forwardly projecting bosses allowing a protective guard or tooth to be mounted thereon, the guard being heldon the boss replaceably by any desired means allowing for ready detachability.
- the guard is preferably stabilized on the boss by fore and aft tangs fitting corresponding recesses. One tang projects from the rear of the guard and the other tang is at the front end of the boss.
- the side of the guard is cast integrally with an outwardly projecting, rearwardly opening (concave) C-shaped shroud fitting and protecting the adjacent portion of the cutting edge of the lip.
- the rear of the guard extends upwardly, opposite a recess at the side of the dipper, thereby to constitute a portion of the side of the dipper.
- a member according to claim l in which both the top surface and rear surface are concave.
- a member acccording to claim I mounted on said support boss; said member having a forward digging edge and an upwardly extending projection at the rear thereof, said projecting being nested in acomplemental recess in one of the side walls of the dipper.
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Component Parts Of Construction Machinery (AREA)
Abstract
Description
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00375431A US3812608A (en) | 1971-12-06 | 1973-07-02 | Dipper bucket corner member with integral shroud |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US20496571A | 1971-12-06 | 1971-12-06 | |
US00375431A US3812608A (en) | 1971-12-06 | 1973-07-02 | Dipper bucket corner member with integral shroud |
Publications (1)
Publication Number | Publication Date |
---|---|
US3812608A true US3812608A (en) | 1974-05-28 |
Family
ID=26899948
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00375431A Expired - Lifetime US3812608A (en) | 1971-12-06 | 1973-07-02 | Dipper bucket corner member with integral shroud |
Country Status (1)
Country | Link |
---|---|
US (1) | US3812608A (en) |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3961788A (en) * | 1975-02-07 | 1976-06-08 | Caterpillar Tractor Co. | Bulldozer blade with improved tip and end bit |
US4007550A (en) * | 1975-05-19 | 1977-02-15 | Caterpillar Tractor Co. | Replaceable corner tooth assembly |
US4047312A (en) * | 1976-09-08 | 1977-09-13 | Caterpillar Tractor Co. | Corner tooth assembly |
US4071967A (en) * | 1977-01-21 | 1978-02-07 | Caterpillar Tractor Co. | Quick change corner tooth assembly for loader buckets |
US4182057A (en) * | 1978-06-16 | 1980-01-08 | Caterpillar Tractor Co. | Releasable corner tooth assembly |
US4748754A (en) * | 1986-04-05 | 1988-06-07 | O&K Orenstein & Koppel Aktiengesellschaft | Shovel for an excavator |
US6301810B1 (en) | 1999-10-01 | 2001-10-16 | Caterpillar Inc. | Hammerless mechanically attached adapter system |
US20030123934A1 (en) * | 2001-10-26 | 2003-07-03 | Steven Weaver | Surface working device and attachable protector |
US6766602B2 (en) | 2002-08-08 | 2004-07-27 | Caterpillar Inc. | Corner tooth adapter arrangement for an excavating implement |
US6848203B2 (en) * | 2002-08-19 | 2005-02-01 | Caterpillar Inc | Base edge protection system and method |
US20070256335A1 (en) * | 2004-02-10 | 2007-11-08 | Italricambi Spa | Tooth for an Excavator Bucket |
US20080066350A1 (en) * | 2004-09-09 | 2008-03-20 | Humphries Robert G | Method and Apparatus for Excavation of a Trench |
CN102400684A (en) * | 2010-09-07 | 2012-04-04 | 刘素华 | Method and excavating impulsion shovel used for simultaneously achieving coal breaking and surface cleaning with one time of impulsion |
US20130008062A1 (en) * | 2009-12-24 | 2013-01-10 | Cqms Pty Ltd | Wear assembly for an excavator bucket |
US20140082976A1 (en) * | 2012-09-21 | 2014-03-27 | Liebherr-Mining Equipment Colmar Sas | Wing shroud for an earth moving machine bucket, bucket and earth moving machine |
US20150211215A1 (en) * | 2012-09-04 | 2015-07-30 | Sandvik Intellectual Property Ab | Bucket corner, ground engaging tool and mutual mechanical attachment thereof |
US20160362874A1 (en) * | 2014-02-28 | 2016-12-15 | Caterpillar Work Tools B.V. | Wing shroud for a dragline lip |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1485243A (en) * | 1923-03-14 | 1924-02-26 | Edwin T Blake | Means for reenforcing excavator-bucket teeth |
US1716432A (en) * | 1926-05-22 | 1929-06-11 | Keystone Driller Co | Excavating scoop |
US1796737A (en) * | 1929-05-23 | 1931-03-17 | Lesher W Van Buskirk | Dipper tooth |
US2965989A (en) * | 1958-05-23 | 1960-12-27 | Myrthan R Hibbard | End bits for blades |
US3029534A (en) * | 1960-05-23 | 1962-04-17 | Rakisits Michael | Bulldozer moldboard corner bit |
US3281972A (en) * | 1963-10-23 | 1966-11-01 | Sandor R Kerestes | Removable blade |
US3455040A (en) * | 1965-12-15 | 1969-07-15 | Abex Corp | Dipper teeth with stabilizing inclined faces |
US3621594A (en) * | 1969-02-13 | 1971-11-23 | Esco Corp | Cutting edge for excavating devices |
-
1973
- 1973-07-02 US US00375431A patent/US3812608A/en not_active Expired - Lifetime
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1485243A (en) * | 1923-03-14 | 1924-02-26 | Edwin T Blake | Means for reenforcing excavator-bucket teeth |
US1716432A (en) * | 1926-05-22 | 1929-06-11 | Keystone Driller Co | Excavating scoop |
US1796737A (en) * | 1929-05-23 | 1931-03-17 | Lesher W Van Buskirk | Dipper tooth |
US2965989A (en) * | 1958-05-23 | 1960-12-27 | Myrthan R Hibbard | End bits for blades |
US3029534A (en) * | 1960-05-23 | 1962-04-17 | Rakisits Michael | Bulldozer moldboard corner bit |
US3281972A (en) * | 1963-10-23 | 1966-11-01 | Sandor R Kerestes | Removable blade |
US3455040A (en) * | 1965-12-15 | 1969-07-15 | Abex Corp | Dipper teeth with stabilizing inclined faces |
US3621594A (en) * | 1969-02-13 | 1971-11-23 | Esco Corp | Cutting edge for excavating devices |
Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3961788A (en) * | 1975-02-07 | 1976-06-08 | Caterpillar Tractor Co. | Bulldozer blade with improved tip and end bit |
US4007550A (en) * | 1975-05-19 | 1977-02-15 | Caterpillar Tractor Co. | Replaceable corner tooth assembly |
US4047312A (en) * | 1976-09-08 | 1977-09-13 | Caterpillar Tractor Co. | Corner tooth assembly |
US4071967A (en) * | 1977-01-21 | 1978-02-07 | Caterpillar Tractor Co. | Quick change corner tooth assembly for loader buckets |
US4182057A (en) * | 1978-06-16 | 1980-01-08 | Caterpillar Tractor Co. | Releasable corner tooth assembly |
WO1980000088A1 (en) * | 1978-06-16 | 1980-01-24 | Caterpillar Tractor Co | Releasable corner tooth assembly |
US4748754A (en) * | 1986-04-05 | 1988-06-07 | O&K Orenstein & Koppel Aktiengesellschaft | Shovel for an excavator |
US6301810B1 (en) | 1999-10-01 | 2001-10-16 | Caterpillar Inc. | Hammerless mechanically attached adapter system |
US6799388B2 (en) * | 2001-10-26 | 2004-10-05 | Sandvik Ab | Surface working device and attachable protector |
US20030123934A1 (en) * | 2001-10-26 | 2003-07-03 | Steven Weaver | Surface working device and attachable protector |
US6766602B2 (en) | 2002-08-08 | 2004-07-27 | Caterpillar Inc. | Corner tooth adapter arrangement for an excavating implement |
US6848203B2 (en) * | 2002-08-19 | 2005-02-01 | Caterpillar Inc | Base edge protection system and method |
US20070256335A1 (en) * | 2004-02-10 | 2007-11-08 | Italricambi Spa | Tooth for an Excavator Bucket |
US20080066350A1 (en) * | 2004-09-09 | 2008-03-20 | Humphries Robert G | Method and Apparatus for Excavation of a Trench |
US20130008062A1 (en) * | 2009-12-24 | 2013-01-10 | Cqms Pty Ltd | Wear assembly for an excavator bucket |
US9091042B2 (en) * | 2009-12-24 | 2015-07-28 | Cqms Pty Ltd | Wear assembly for an excavator bucket |
CN102400684A (en) * | 2010-09-07 | 2012-04-04 | 刘素华 | Method and excavating impulsion shovel used for simultaneously achieving coal breaking and surface cleaning with one time of impulsion |
US20150211215A1 (en) * | 2012-09-04 | 2015-07-30 | Sandvik Intellectual Property Ab | Bucket corner, ground engaging tool and mutual mechanical attachment thereof |
US9593470B2 (en) * | 2012-09-04 | 2017-03-14 | Sandvik Intellectual Property Ab | Bucket corner, ground engaging tool and mutual mechanical attachment thereof |
US20140082976A1 (en) * | 2012-09-21 | 2014-03-27 | Liebherr-Mining Equipment Colmar Sas | Wing shroud for an earth moving machine bucket, bucket and earth moving machine |
US10208461B2 (en) * | 2012-09-21 | 2019-02-19 | Liebherr-Mining Equipment Colmar Sas | Wing shroud for an earth moving machine bucket, bucket and earth moving machine |
US20160362874A1 (en) * | 2014-02-28 | 2016-12-15 | Caterpillar Work Tools B.V. | Wing shroud for a dragline lip |
US9995022B2 (en) * | 2014-02-28 | 2018-06-12 | Caterpillar Work Tools B.V. | Wing shroud for a dragline lip |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: CHEMICAL BANK, A CORP. OF NY Free format text: SECURITY INTEREST;ASSIGNOR:AMALLOY CORPORATION;REEL/FRAME:004854/0891 Effective date: 19880311 Owner name: CHEMICAL BANK, 110 EAST 59TH STREET, NEW YORK, NEW Free format text: SECURITY INTEREST;ASSIGNOR:AMALLOY CORP., A N.J. CORP.;REEL/FRAME:004893/0288 Effective date: 19880311 Owner name: CHEMICAL BANK, A NEW YORK BANKING CORP.,NEW YORK Free format text: SECURITY INTEREST;ASSIGNOR:AMALLOY CORP., A N.J. CORP.;REEL/FRAME:004893/0288 Effective date: 19880311 Owner name: CHEMICAL BANK, NEW YORK Free format text: SECURITY INTEREST;ASSIGNOR:AMALLOY CORP., A N.J. CORP.;REEL/FRAME:004893/0288 Effective date: 19880311 |
|
AS | Assignment |
Owner name: AMALLOY CORP., A CORP. OF NJ Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ABEX CORPORATION;REEL/FRAME:004890/0859 Effective date: 19880310 |