US3292280A - Digging tooth for earth-moving equipment - Google Patents

Digging tooth for earth-moving equipment Download PDF

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Publication number
US3292280A
US3292280A US332067A US33206763A US3292280A US 3292280 A US3292280 A US 3292280A US 332067 A US332067 A US 332067A US 33206763 A US33206763 A US 33206763A US 3292280 A US3292280 A US 3292280A
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US
United States
Prior art keywords
tooth
holder
tines
walls
digging
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
Application number
US332067A
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English (en)
Inventor
Richard L Launder
Ernie L Launder
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
H&L Tooth Co
Original Assignee
H&L Tooth Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by H&L Tooth Co filed Critical H&L Tooth Co
Priority to US332067A priority Critical patent/US3292280A/en
Priority to GB44254/64A priority patent/GB1021999A/en
Priority to DE19641484710 priority patent/DE1484710B1/de
Application granted granted Critical
Publication of US3292280A publication Critical patent/US3292280A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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
    • E02F9/2891—Tools for assembling or disassembling

Definitions

  • This invention relates to digging teeth for earth-moving equipment, and included in the objects of this invention are:
  • the tooth is provided with a pair of stiff tines or prongs tapering toward their extremities, except for lateral enlargements or knobs at their extreme ends
  • the holder is welded to the bucket or'blade of a digging or earth-moving machine and is provided with opposed cam surfaces terminating in locking recesses, so that the tines are forced by the cams to spread or constrict until the lateral enlargements engage in the locking recesses.
  • FIG. 1 is a side view of the digging tooth shown secured in one type of holder which in turn is shown welded to a bucket or blade of an earth-moving machine, the bucket or blade being indicated fragmentarily;
  • FIG. 2 is a top or plan view taken from 2-2' of FIG. 1, showing the tooth and its holder before attachment to the earth-moving machine;
  • FIG. 3 is a partial plan, partial sectional view taken along the line 33 of FIG. 1, illustrating particularly the manner in which the tooth is secured to its holder;
  • FIG. 4 is a transverse sectional view taken through 4-4 of FIG. 1;
  • FIG. 5 is a side view similar to FIG. 1 showing the tooth mounted in a modified type of holder
  • FIG. 6 is a partial plan, partial sectional view taken through 66 of FIG. 5;
  • FIG. 7 is a transverse sectional view taken through 77 of FIG. 5.
  • the digging tooth includes a tooth body 1 having forwardly converging upper and lower surfaces as well as forwardly converging edges, terminating in a chisel-shaped point 2. Extending from the root end of the body 1 is a pair of coplanar tines or prongs 3.
  • the tines or prongs 3 have parallel confronting inner edges 4. Rearwardly beyond this region the tines 3 form rearwardly diverging edges 5.
  • the tines 3 also have rearwardly converging outer edges 6. The edges 5 and 6 of each tine therefore converge and terminate in knobs 7 which extend laterally inward and outward from their respective tines.
  • the tooth is adapted to be retained in two types of 3,292,280 Patented Dec. 20, 1966 "ice holders, one being illustrated in FIGS. 1 through 4.
  • the holder 8 here illustrated is provided with rearwardly converging upper and lower surfaces 9 and 10, occupying the main portion of its length, and forwardly converging upper and lower surfaces 11 and 12 at the forward portion thereof.
  • the front end and lateral sides of the holder 8 are pro-,
  • the channels have upper and lower walls 15 and 16 which mate with the upper and lower surfaces of the tines 3, so that the channels form guide means which are essentially parallel with the lower surface of the holder 8 and are therefore in angular relation to the upper surface thereof.
  • the forward portions of the side channels 14 define parallel walls 17 which fit between the parallel inner edges 4 of the tines 3 at the root regions thereof. Beyond this portion the side channels 14 form cam surfaces 18 which diverge rearwardly to apices 19, and then converge to form rudimentary locking recesses 20. The rear portion of the holder 8 continues to taper beyond the recesses 20, as indicated by 21.
  • the digging tooth is formed of hardened steel alloy
  • the tines 3 are relatively rigid, their rearward extremities in the region of the knobs 7 are capable of limited movement to and from each other.
  • the normal spacing between the knobs 7 is slightly less than between the apices 19.
  • the tooth is assembled onto the holder 8 by guiding the tines 3 manually in the channels 13 and 14 until the knobs 7 are in contact with the cam surfaces 18; that is, when in the dotted line position shown in FIG. 3.
  • the tooth is then hammer driven to the solid line position shown, causing the knobs 7 to pass beyond the apices 19 into the locking recesses 20.
  • the parallel edges 4 are contiguous to the parallel walls 17 to withstand the lateral loads.
  • the upper and lower walls 15 and 16 of the holder 8 reinforce the tines 3 against loads perpendicular to the tooth body 1.
  • the principal loads incurred in digging are ina rearward direction, and are readily transmitted to the holder 8 without appreciable loads being imposed on the knobs 7, so that under digging operations the tine 3 is similarly held in place until such time as the tooth has become worn and requires replacement.
  • the knobs 7 are struck with a ball peen hammer until the tooth is worked loose.
  • another tooth such as a worn tooth, may be placed with its knobs in engagement with the knobs 7, as shown by broken lines in FIG. 3, so that force may be applied essentially equally on both lateral sides of the tooth until the knobs 7 have passed over the apices 19; whereupon nominal further tapping on the tooth will effect its removal from the tooth holder.
  • the upper side of the tooth holder is relatively flat, and its margins are so arranged as to permit attachment to a blade or bucket A by means of welds B.
  • the holder 22 here illustrated is likewise provided with rearwardly converging upper and lower surfaces 23 and 24. But in this case, the holder 22 is provided with a central longitudinally extending slot 25 which is essentially parallel with the lower surface 24 of the holder 22. The sides of the holder may continue beyond the slot 25, forming projections 26.
  • the lateral sides of the slot 25 form rearwardly con' 3 locking recesses 29.
  • the tines 3 are forced inwardly toward each other a slight distance to eflect locking engagement rather than outwardly as in the first described structure.
  • the rearwardly converging outer edges 6 of the tooth conform to the tapered cam walls 27, and in addition the upper and lower walls of the slot 25 and the upper and lower surfaces of the tines 3 may taper slightly so that a wedge-fit is provided between the tooth and its holder 22 in addition to the interlocking fit of the knobs 7 and the recesses 29.
  • a chisel, wedge, or similar implement is inserted in the root region between the tines 3 so as to wedge the tooth forwardly and free of the holder 22.
  • another tooth such as worn tooth, may be inserted in the rear end of the tooth holder 22, as indicated by broken lines in FIG. 6, for the purpose of initiating removal of the tooth.
  • said tines being capable of limited elastic deflection and dimensioned to be deflected as they are guided along the tapering walls of the holder until said lateral enlargements are forced over said shoulders for securing said tooth to said holder;
  • a digging tooth and holdertherefor comprising: (a) a holder including: a flat attachment face adapted to be welded to a digging implement; said holder. defining an essentially U-shaped channel extending across one end and along opposite sides thereof; (b) said channel defining a plane disposed in acute angular relation to said attachment face; the [base walls of the portions of said channel extending along opposite sides of said holder and being open at their,
  • said base at first extending parallel then diverging from each other and terminating in shoulders at their rearward ends;
  • a tooth including: a flat body having a chisel? pointed extended end; and a pair of tines coplanar with each other and said body;
  • said tines having parallel walls confronting the parallel portions of the base walls of said channels, diverging walls confronting the diverging portions of said base walls, and lateral protrusions fittings over and retained by said shoulders;
  • said tines being elastically yieldable whereby said tooth may be driven into said holder and their extremities deflected by said base walls until said protrusions engage said shoulders;

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Percussive Tools And Related Accessories (AREA)
US332067A 1963-12-20 1963-12-20 Digging tooth for earth-moving equipment Expired - Lifetime US3292280A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US332067A US3292280A (en) 1963-12-20 1963-12-20 Digging tooth for earth-moving equipment
GB44254/64A GB1021999A (en) 1963-12-20 1964-10-29 Digging tooth for earth moving equipment
DE19641484710 DE1484710B1 (de) 1963-12-20 1964-11-03 Baggerzahn

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US332067A US3292280A (en) 1963-12-20 1963-12-20 Digging tooth for earth-moving equipment

Publications (1)

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US3292280A true US3292280A (en) 1966-12-20

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ID=23296590

Family Applications (1)

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US332067A Expired - Lifetime US3292280A (en) 1963-12-20 1963-12-20 Digging tooth for earth-moving equipment

Country Status (3)

Country Link
US (1) US3292280A (de)
DE (1) DE1484710B1 (de)
GB (1) GB1021999A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3496657A (en) * 1967-01-03 1970-02-24 Petersen Gerald A Holder accommodating different size teeth
US4333536A (en) * 1977-08-09 1982-06-08 Agrowplow Pty. Limited Plow shank and digging blade attached to lower extremity thereof by adaptor
US20080196537A1 (en) * 2007-02-09 2008-08-21 Campagnolo S.R.L. Command device for a derailleur of a bicycle
US20090133526A1 (en) * 2007-11-23 2009-05-28 Campagnolo S.R.L. Control device for a bicycle with curved handlebars

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1696924A (en) * 1925-01-09 1929-01-01 American Manganese Steel Co Interlocked excavator teeth
US1799929A (en) * 1929-06-10 1931-04-07 John D Rauch Dipper tooth
US2052521A (en) * 1934-12-18 1936-08-25 Taylor Wharton Iron & Steel Co Dredge bucket
US2603009A (en) * 1948-02-03 1952-07-15 Forrest E Smith Dipper tooth construction
US2996816A (en) * 1958-09-08 1961-08-22 Tooth H & L Co Detachable tooth cap
US3225468A (en) * 1961-12-04 1965-12-28 Petersen Gerald A Support for trencher tooth

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2885801A (en) * 1956-03-06 1959-05-12 Electric Steel Foundry Co Tooth structure for trenchers and the like
US3057091A (en) * 1960-04-19 1962-10-09 Gerald A M Petersen Reversible tooth having resilient retaining means

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1696924A (en) * 1925-01-09 1929-01-01 American Manganese Steel Co Interlocked excavator teeth
US1799929A (en) * 1929-06-10 1931-04-07 John D Rauch Dipper tooth
US2052521A (en) * 1934-12-18 1936-08-25 Taylor Wharton Iron & Steel Co Dredge bucket
US2603009A (en) * 1948-02-03 1952-07-15 Forrest E Smith Dipper tooth construction
US2996816A (en) * 1958-09-08 1961-08-22 Tooth H & L Co Detachable tooth cap
US3225468A (en) * 1961-12-04 1965-12-28 Petersen Gerald A Support for trencher tooth

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3496657A (en) * 1967-01-03 1970-02-24 Petersen Gerald A Holder accommodating different size teeth
US4333536A (en) * 1977-08-09 1982-06-08 Agrowplow Pty. Limited Plow shank and digging blade attached to lower extremity thereof by adaptor
US20080196537A1 (en) * 2007-02-09 2008-08-21 Campagnolo S.R.L. Command device for a derailleur of a bicycle
US20090133526A1 (en) * 2007-11-23 2009-05-28 Campagnolo S.R.L. Control device for a bicycle with curved handlebars

Also Published As

Publication number Publication date
DE1484710B1 (de) 1970-05-14
GB1021999A (en) 1966-03-09

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