US3508352A - Dipper teeth assemblies with means to prevent random reaction points - Google Patents

Dipper teeth assemblies with means to prevent random reaction points Download PDF

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Publication number
US3508352A
US3508352A US645966A US3508352DA US3508352A US 3508352 A US3508352 A US 3508352A US 645966 A US645966 A US 645966A US 3508352D A US3508352D A US 3508352DA US 3508352 A US3508352 A US 3508352A
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United States
Prior art keywords
tooth
nose
cavity
support
converging
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
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US645966A
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English (en)
Inventor
Robert P Radwill
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Amsted Industries Inc
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Amsted Industries Inc
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Publication date
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Publication of US3508352A publication Critical patent/US3508352A/en
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Assigned to AMSTED INDUSTRIES INCORPORATED, A CORP. OF DE. reassignment AMSTED INDUSTRIES INCORPORATED, A CORP. OF DE. RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: FIRST NATIONAL BANK OF CHICAGO, AS AGENT
Expired - Lifetime legal-status Critical Current

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    • 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

Definitions

  • This invention relates to dipper teeth assemblies for excavating equipment and more particularly to improvements in such assemblies wherein a hollow point is removably capped over a support.
  • an object of this invention is the provision of an improved tooth point assembly with superior stress characteristics that does not require extensive modifications of present designs.
  • Another object is the provision of an improved tooth point and support combination that resolve the reaction points thereon into predetermined areas of the structure, rather than at random locations.
  • a further object of this invention is the provision of recesses or pads on selective and normally contacting areas of the tooth or support that will tend to distribute external forces to the stronger areas of the structure and prevent high concentration of such stresses, especially in the weaker areas of such structures.
  • FIGURE 1 is a plan view of the improved tooth and support shown in a disassembled relationship
  • FIGURE 2 is a view taken substantially along line 22 of FIGURE 1, showing the tooth in cross section and the support in elevation in an assembled relationship;
  • FIGURE 3 is an end view of the tooth structure, taken substantially along line 3-3 of FIGURE 1;
  • FIGURE 4 is a fragmentary end view of a dipper tooth point showing a modification of the present invention.
  • the dipper tooth assembly comprises a support or base 10 and a tooth point 12 adapted for telescopic engagement over the base. Since the base and point are symmetrical about the transverse center plane AA (FIG. 2.) of the base nose, the base 10 and the tooth point 12 are individually reversible.
  • the base 10 comprises a generally wedge-shaped nose section 14 having upper and lower converging surfaces 16 and 18, respectively, and substantially parallel side surfaces 20, which together with the upper and lower surfaces define a forward edge surface 22.
  • the side surfaces 20 are substantially normal to the transverse center plane A-A of the base.
  • the nose section 14 may also be provided with a shelf 24 insert from the upper and lower converging surfaces 16- and 18 respectively.
  • the tooth point 12 is also generally wedge shaped and comprises upper and lower external surfaces 26 and 28, respectively, and parallel side external surfaces 30, which merge to form a forward edge 32.
  • the tooth point 12 has a wedge shaped cavity 34 presenting upper and lower converging surfaces 36 and 38, respectively, and substantially parallel side surfaces 40 merging to form a forward surface 42.
  • the upper and lower converging surfaces 36 and 38, respectively, of the cavity 34 correspond to and mate with respective upper and lower converging surfaces 16 and 18 of the nose section 14.
  • the tooth point cavity 34 is provided with upper and lower opposing and spaced ledges 43 on respective upper and lower converging surfaces 36 and 38, which engage corresponding shelves 24 of the nose section 14.
  • Coaligned slots 44 and 46 are provided respectively in the nose section 14 and the tooth point 12 for receiving a retainer pin (not shown).
  • the present invention represents an improvement over the conventional structure hereinbefore described and comprises one or more recesses in the normally mating or interfitting surfaces of the tooth assembly.
  • recesses are provided on one or more areas of the interfitting surfaces of the tooth and support such as to expose relatively raised areas for reaction between the tooth and the support and to prevent reaction points at random locations.
  • the relatively raised areas are pref erably located near the sides of the tooth and toward the corners of the support within the tooth cavity.
  • recesses 48 are provided from the open end of the tooth point 12 inwardly, said recesses being provided on the upper and lower converging surfaces 36 and 38, respectively, spaced from the side surfaces 40 and adjacent to the ledges 42 of the cavity 34.
  • the recesses 48 extend along only a portion of the upper and lower converging surfaces 36 and 38, thereby exposing raised areas 50 along the corners of the tooth cavity 34 to the interfitting nose section 14.
  • the raised areas 50 tend to minimize bending moments on the corners 52 of the tooth point 12, where failures often occur.
  • the recesses 48 are essential only in the lower converging surface 38 if the tooth is non-reversible. However, if the tooth is to be removed and rotated, it has been found expedient to also provide recesses in the upper converging surface 36.
  • recesses 54 may also be provided on the nose section 14 of the base 10, said recesses being located on the upper and lower converging surfaces 16 and 18, respectively, intermediate the extremes of the interfitting portion of the nose section.
  • the recesses 54 on the nose section 14 prevents excessive bending forces thereon by providing positive reaction locations.
  • recesses 56 may also be provided on the central forward portion of the nose section 14 adjacent the forward edge surface 22 thereof, which tends to equalize any force applied against the nose section between both sides of the nose.
  • FIGURE 4 Another modification of the present invention is shown in FIGURE 4.
  • the upper and lower converging surfaces 60 and 62, respectively, of the cavity 64 of the tooth 66 are flared'outwardly over the entire area thereof toward the open end of the cavity, as indicated at 67, such that the interfitting support nose (shown in outline at 68) does not contact those tooth cavity surfaces near the open end of the cavity.
  • the reaction area between the tooth and the nose is moved forward toward the apex of the tooth, which tends to decrease the bending moment acting near the open end of the tooth.
  • the present invention has the advantage of greatly increasing the strength of dipper teeth assemblies without materially changing the design of the structure.
  • a dipper tooth assembly including a support member having a nose and a tooth point having an'open end cavity and capped over said nose in telescoping relal nose, said cavity having a ledge extending centrally along each of said converging surfaces of said cavity from the open end thereof, and a recess in each of the converging surfaces of the nose receiving respective ledges of said cavity, at least one of the converging surfaces of said cavity being recessed from the corresponding converging surface of said nose from the open end of said cavity inwardly in an area adjacent to and on both sides of said ledge, said recesses in said cavity preventing contact between the converging surfaces of the nose and cavity in an area adjacent said ledge and allowing contact between the converging surfaces of said nose and cavity in predetermined areas adjacent to said pairs of side surfaces and the open end of said cavity to thereby prevent random reaction points between said tooth and support.
  • recessed areas are provided in both converging surfaces of said nose extending between the central recess therein and both side surfaces thereof, said last-mentioned recessed areas being spaced fro-m the end surface of said nose and from the open end of said cavity when said tooth is mounted on said point and preventing contact between the converging surfaces of said nose and cavity at said recessed areas.
  • a dipper tooth assembly comprising a support member having a nose and a tooth point having an open end cavity and capped over said nose in telescoping relationship, said cavity and said nose having respective pairs of spaced side surfaces and respective pairs of surfaces converging toward respective end surfaces and substantially defining a wedge shape in each of said cavity and said nose, said cavity having a ledge extending centrally along each of the converging surfaces of said cavity from the open end thereof, and a central recess in each of the converging surfaces of the nose receiving respective ledges of said cavity, at least one of the converging surfaces of said nose having a recessed area therein spaced from the corresponding converging surface of said cavity in an area between the central recess in said nose and both side surfaces thereof, said recessed area being located in an area intermediate the end surface of said nose and the open end of said cavity when said tooth point is mounted on said nose, said recess preventing contact between the converging surfaces of said nose and cavity in the area of said recess and allowing contact between the converging

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Component Parts Of Construction Machinery (AREA)
US645966A 1967-06-14 1967-06-14 Dipper teeth assemblies with means to prevent random reaction points Expired - Lifetime US3508352A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US64596667A 1967-06-14 1967-06-14

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US3508352A true US3508352A (en) 1970-04-28

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US645966A Expired - Lifetime US3508352A (en) 1967-06-14 1967-06-14 Dipper teeth assemblies with means to prevent random reaction points

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US (1) US3508352A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE716341A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1190887A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
SE (1) SE331671B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4668122A (en) * 1985-11-20 1987-05-26 Rexworks Inc. Two bolt taper cleat
US5144762A (en) * 1990-04-16 1992-09-08 Gh Hensley Industries, Inc. Wear indicating and tooth stabilizing systems for excavating tooth and adapter assemblies
US5412885A (en) * 1993-07-02 1995-05-09 Caterpillar Inc. Bucket base edge protector assembly
US5456029A (en) * 1993-11-01 1995-10-10 Caterpillar Inc. Tooth to adapter coupler
US20050152745A1 (en) * 2001-11-27 2005-07-14 Livesay Richard E. System for attaching a replaceable ground engaging wear member
WO2007060697A1 (en) * 2005-11-25 2007-05-31 Esti S.R.L. Tip assembly for earth moving machinery
US20080028644A1 (en) * 2003-12-05 2008-02-07 Lopez Almendros Jose Wear Assembly and Components Thereof, Which is Intended for Machines That Are Used to Move Mateials Such as Earth and Stones
US10508418B2 (en) 2016-05-13 2019-12-17 Hensley Industries, Inc. Stabilizing features in a wear member assembly
USD918965S1 (en) 2018-06-19 2021-05-11 Hensley Industries, Inc. Ground engaging wear member

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1620132A (en) * 1926-01-25 1927-03-08 American Manganese Steel Co Reversible-point dipper tooth
US1783350A (en) * 1928-12-17 1930-12-02 American Manganese Steel Co Dipper tooth
US2870667A (en) * 1954-07-08 1959-01-27 American Brake Shoe Co Retaining key for dipper tooth parts having resilient pad
US2982035A (en) * 1958-04-28 1961-05-02 Thomas C Whisler Excavator tooth
US2994141A (en) * 1959-12-08 1961-08-01 Stephenson Ferrald Daniel Keeper
US3079710A (en) * 1961-06-22 1963-03-05 Esco Corp Ground-working tooth and method
US3371437A (en) * 1965-04-28 1968-03-05 Mid Continent Steel Casting Co Locking device for digger tooth

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1620132A (en) * 1926-01-25 1927-03-08 American Manganese Steel Co Reversible-point dipper tooth
US1783350A (en) * 1928-12-17 1930-12-02 American Manganese Steel Co Dipper tooth
US2870667A (en) * 1954-07-08 1959-01-27 American Brake Shoe Co Retaining key for dipper tooth parts having resilient pad
US2982035A (en) * 1958-04-28 1961-05-02 Thomas C Whisler Excavator tooth
US2994141A (en) * 1959-12-08 1961-08-01 Stephenson Ferrald Daniel Keeper
US3079710A (en) * 1961-06-22 1963-03-05 Esco Corp Ground-working tooth and method
US3371437A (en) * 1965-04-28 1968-03-05 Mid Continent Steel Casting Co Locking device for digger tooth

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4668122A (en) * 1985-11-20 1987-05-26 Rexworks Inc. Two bolt taper cleat
US5144762A (en) * 1990-04-16 1992-09-08 Gh Hensley Industries, Inc. Wear indicating and tooth stabilizing systems for excavating tooth and adapter assemblies
US5412885A (en) * 1993-07-02 1995-05-09 Caterpillar Inc. Bucket base edge protector assembly
US5456029A (en) * 1993-11-01 1995-10-10 Caterpillar Inc. Tooth to adapter coupler
US20050152745A1 (en) * 2001-11-27 2005-07-14 Livesay Richard E. System for attaching a replaceable ground engaging wear member
US20080196281A1 (en) * 2001-11-27 2008-08-21 Livesay Richard E System for Attaching a Replaceable Ground Engaging Wear Member
US7926207B2 (en) * 2003-12-05 2011-04-19 Metalogenia, S.A. Wear assembly and components thereof, which is intended for machines that are used to move materials such as earth and stones
US20080028644A1 (en) * 2003-12-05 2008-02-07 Lopez Almendros Jose Wear Assembly and Components Thereof, Which is Intended for Machines That Are Used to Move Mateials Such as Earth and Stones
EP2378010A3 (en) * 2005-11-25 2012-01-18 ESTI S.r.l. Tip for earth moving machinery and locking key therefore
CN101316968B (zh) * 2005-11-25 2011-07-27 爱斯提有限公司 用于土方作业机械的尖端组件
WO2007060697A1 (en) * 2005-11-25 2007-05-31 Esti S.R.L. Tip assembly for earth moving machinery
US10508418B2 (en) 2016-05-13 2019-12-17 Hensley Industries, Inc. Stabilizing features in a wear member assembly
US10787794B2 (en) 2016-05-13 2020-09-29 Hensley Industries, Inc. Stabilizing features in a wear member assembly
US10801188B2 (en) 2016-05-13 2020-10-13 Hensley Industries, Inc. Stabilizing features in a wear member assembly
US10808383B2 (en) 2016-05-13 2020-10-20 Hensley Industries, Inc. Stabilizing features in a wear member assembly
US10865545B2 (en) 2016-05-13 2020-12-15 Hensley Industries, Inc. Stabilizing features in a wear member assembly
US10895064B2 (en) 2016-05-13 2021-01-19 Hensley Industries, Inc. Stabilizing features in a wear member assembly
US10907327B2 (en) 2016-05-13 2021-02-02 Hensley Industries, Inc. Stabilizing features in a wear member assembly
US10995478B2 (en) 2016-05-13 2021-05-04 Hensley Industries, Inc. Stabilizing features in a wear member assembly
US11926996B2 (en) 2016-05-13 2024-03-12 Hensley Industries, Inc. Stabilizing features in a wear member assembly
USD918965S1 (en) 2018-06-19 2021-05-11 Hensley Industries, Inc. Ground engaging wear member

Also Published As

Publication number Publication date
GB1190887A (en) 1970-05-06
SE331671B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1971-01-04
BE716341A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1968-11-04

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AS Assignment

Owner name: AMSTED INDUSTRIES INCORPORATED, A CORP. OF DE., IL

Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:FIRST NATIONAL BANK OF CHICAGO, AS AGENT;REEL/FRAME:005070/0731

Effective date: 19880831