US3471954A - Resilient ball retainer for tooth and holder - Google Patents
Resilient ball retainer for tooth and holder Download PDFInfo
- Publication number
- US3471954A US3471954A US566120A US3471954DA US3471954A US 3471954 A US3471954 A US 3471954A US 566120 A US566120 A US 566120A US 3471954D A US3471954D A US 3471954DA US 3471954 A US3471954 A US 3471954A
- Authority
- US
- United States
- Prior art keywords
- tooth
- holder
- ball
- retainer
- recess
- 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
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 230000000295 complement effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000004677 Nylon Substances 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012858 resilient material Substances 0.000 description 1
- 238000003466 welding Methods 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
- E02F9/2816—Mountings therefor
- E02F9/2833—Retaining means, e.g. pins
- E02F9/2841—Retaining means, e.g. pins resilient
Definitions
- the invention relates to a combination of a tooth of the type used in excavating equipment, a tooth holder therefor, and a ball partially received in a recess in the holder and projecting therefrom, which engages a surface of the tooth received in the holder, is deformed by the force of insertion of the tooth and is sufliciently resilient so that it fits into a depression in the tooth to serve as a detent.
- the ball serves to restrain the tooth from unintentional dislodgment from the holder.
- a particular feature and advantage of the invention is the fact that the ball can be used repeatedly to perform its retaining function.
- This feature of the ball arises out of the fact that after it has been used once it may be rotated slightly and a different portion of its surface then serves to contact the tooth. Accordingly, although the ball is somewhat deformed after each use, the area of the ball which is so deformed is small compared with its over-all area thereby permitting a new portion of the surface to be presented each time the ball is used.
- the present invention provides a convenient means for retaining a tooth in its holder which may be used repeatedly and is as effective each time it is used as the preceding times.
- a tooth having a distal portion of a broad, flat spade-like shape and having a proximal portion of lesser cross section.
- the holder has an enlarged outer end formed with a recess complementary to the proximal portion of the tooth.
- a bore is formed in one wall of the recess and a ball fits in the bore and its top projects into the recess.
- the ball may be formed of nylon or other hard but resilient material.
- the bore is larger than the ball to accommodate deformation thereof.
- a preferred form to accomplish this result is to form the bore with a semi-spherical bottom complementary to the ball and a short cylindrical section above the semi-spherical bottom.
- the back end of the tooth is slightly relieved to permit the back end of the tooth to fit over the exposed top of the ball.
- the ball deforms to permit passage of the tooth past the ball.
- a depression is formed in the surface of the tooth which is immediately opposite the bore when the tooth is fully seated in the holder and by reason of the resilient nature of the ball, it fits into the depression and serves to lock the tooth in place against unintentional displacement.
- the ball is deformed and truncated at the exposed top. When the ball is re-used, it is turned so that a new surface is presented each time the ball is used.
- a further feature of the invention is provision of a tooth having at its distal portion rearwardly-centrally slanted surfaces which mate with cooperating surfaces on the forward end of the tooth holder to limit inward movement of the tooth relative to the holder and also to cooperate in holding the tooth in alignment relative the holder.
- FIG. 1 is a. top plan view of the tooth and a portion of the holder.
- FIG. 2 is a longitudinal vertical sectional view taken substantially along the line 2-2 of FIG. 1.
- FIG. 3 is a fragmentary sectional view showing a preliminary step in the insertion of the tooth in the holder.
- FIG. 4 is a view similar to FIG. 3, showing a further step in the insertion of the tooth.
- the present invention has particular application in excavating machines (not shown) of a type commercially available used in smoothing roadway surfaces preparatory to paving.
- a rotating shaft which is horizontally-transversely disposed and power driven, having radial members (not shown) to which the holders 11 of the present invention are applied as by welding, bolting or other convenient means.
- the underside of holder 11 is provided with a step 12 having a forward shoulder 13 for attachment purposes. Forwardly of shoulder 13 the underside of holder 11 is formed with an enlarged bottom portion 14.
- Extending above the top of the rearward stem 16 of holder 11 are side portions 17 and the side portions 17 are interconnected at the front end of the holder 11 by a top portion 18 which extends transversely therebetween.
- top portion 18 An aperture 19 is formed centrally in top portion 18 in order to insert the ball as hereinafter described.
- recess 21 which is generally rectangular in cross-section.
- a centrally disposed cylindrical bore 23 In the bottom wall 22 of recess 21 and extending into bottom portion 14 is a centrally disposed cylindrical bore 23 having a spherical bottom 24.
- Knock-out hole 20 extends out the bottom.
- Rearwardly of top portion 18 is an opening 25 through which an instrument may be inserted to drive the tooth out of the recess when required.
- Tooth 26 is formed with a distal portion 27 and a proximal portion 28.
- Distal portion 27 has sidewardlyoutwardly diverging vertical side edges 30 which terminate in a blunt transverse forward cutting edge 29 having a width slightly greater than that of holder 11.
- Top surface 31 slants downwardly-forwardly as viewed in FIG. 2 and the central bottom surface 32 tapers forwardly toward front edge 29. Because of the wear of the front corners and the susceptibility of such corners to be broken off, bottom surface 32 is provided with relatively narrow side ribs 33 which coverge forwardly toward front edge 29.
- Bottom surface 32 curves as indicated by reference numeral 34 adjacent the rearward end of the distal portion so that there is a substantial thickness of material in the back of the distal portion.
- the back surfaces 36, 37 of the distal portion angle rearwardly-inwardly and the forward end of holder 11 is likewise formed with angular inward-rearward surfaces 38, 39 mating with surfaces 36, 37, respectively.
- the shape of the cooperating rear surfaces of the tooth and forward surfaces of the holder limit inward movement of the tooth relative to the holder and also tend to hold the tooth in alignment relative to the holder and to the machine in which it is installed.
- Proximal portion 28 of the tooth is of lesser width than distal portion 27 and has parallel vertical side edges 41 spaced apart approximately half the distance between edges 30.
- the bottom 42 of portion 28 is fiat through most of its area.
- a depression or dimple 43 is formed therein in registry with bore 23 in the assembled position of the tooth and holder.
- the bottom back edge is relieved as indicated by reference numeral 44 for a purpose which hereinafter appears.
- Top surface 45 is generally flat and fits against the top wall of recess 21.
- Rearward end 48 is fiat and transverse.
- the retainer to hold the tooth in the holder is a ball 51 which fits in bore 23 and rests on spherical bottom 24 with its top portion projecting above surface 22.
- Ball 51 may be formed of nylon or other relatively hard suitable material and is of a commercially available type used in various industries.
- the proximal end 28 of tooth 26 is inserted in recess 21 with ball 51 in place. Insertion of ball 51 may be accomplished by dropping it through opening 19 or by inserting it through the front of the recess 21. As the back edge 48 moves rearwardly, it encounters the top exposed portion of ball 51 and the relieved portion 44 fits over the top of ball and serves as a ramp so that as the inward movement of the tooth continues to the position shown in FIG. 4, the ball 51 is squeezed and deformed in bore 23 and partially bent back in a tip 52 which is squeezed into the clearance between the proximal portion of the tooth and the recess 21. When the tooth reaches its fully inserted position as shown in FIG.
- ball 51 by reason of the resilient nature of ball 51, it at least partially returns to its original position and thus at least partially fills depression 43.
- the ball 51 thus serves to lock or keep the tooth in the holder.
- the top of the ball as indicated by reference numeral 53 is somewhat deformed, part of the displaced material appearing in the tip 52.
- the extent of the total surface area of the ball which is thus deformed is relatively small and hence the ball may be re-used repeatedly by merely turning it in bore 23. It has been found that although ball 51 is deformed, little if any material is 'actually shaved 01f.
- an instrument When it is necessary to remove the tooth, an instrument may be inserted through the back opening and driven against the back end 48. During such operation, the ball 51 again deforms. The ball may be unseated by probing through hole 20, then turned in seat 24 to expose a different part of its surface.
- a tooth having a distal portion formed with at least one cutting edge and a proximal portion, said proximal portion being generally rectangular in cross-section and having a longitudinally extending first surface
- a tooth holder having a forwardly-opening recess shaped generally complementary to said proximal portion and having a longitudinally extending second surface in proximity to said first surface, said first surface being formed with a dimple-like depression and said second surface being formed with a bore in registry with said depression;
- said bore being cylindrical at its outer end and hemispherical at its inner end, the back end of said first surface being formed with a central relieved area, and a retainer shaped in a ball, said ball being partially in said bore and having its top projecting beyond said second surface, said retainer being of a radius about equal to that of said hemispherical end of said bore, said retainer fitting in said depression in the assembled position of said tooth and holder to restrain unintentional dislodgement of said tooth, said retainer
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Dental Prosthetics (AREA)
Description
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US56612066A | 1966-07-18 | 1966-07-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3471954A true US3471954A (en) | 1969-10-14 |
Family
ID=24261579
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US566120A Expired - Lifetime US3471954A (en) | 1966-07-18 | 1966-07-18 | Resilient ball retainer for tooth and holder |
Country Status (1)
Country | Link |
---|---|
US (1) | US3471954A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3665623A (en) * | 1969-03-21 | 1972-05-30 | Western Rock Bit Co Ltd | Trencher tooth mounting |
US3738032A (en) * | 1970-09-29 | 1973-06-12 | Western Rock Bit Co Ltd | Digger tooth retainer |
US3826024A (en) * | 1972-01-06 | 1974-07-30 | G Petersen | Excavator tooth, holder and retainer |
US4360981A (en) * | 1977-12-12 | 1982-11-30 | Suncor Inc. | Lip and tooth combination for bucket wheel excavator |
US20110030248A1 (en) * | 2009-08-05 | 2011-02-10 | Charles Clendenning | Tooth assembly and related method for releasably coupling a tooth to an adapter |
US9359744B2 (en) | 2009-08-05 | 2016-06-07 | H&L Tooth Company | Multipiece wear assembly |
Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1874783A (en) * | 1931-12-24 | 1932-08-30 | Mekeel Van Cortright | Digger tooth |
US2256488A (en) * | 1938-06-22 | 1941-09-23 | Daniels Murtaugh Company | Replaceable tooth for dippers |
US2263215A (en) * | 1940-11-09 | 1941-11-18 | Pettibone Mulliken Corp | Dipper tooth |
GB543733A (en) * | 1941-09-13 | 1942-03-10 | Larymore W | Improvements in or relating to couplings for rods, tubes, shafts or the like |
US2319464A (en) * | 1942-01-27 | 1943-05-18 | Massa Laurence | Tooth for excavating apparatus |
US2546457A (en) * | 1946-08-21 | 1951-03-27 | Ernie L Launder | Fastener for a tooth cap or the like |
US2852874A (en) * | 1954-06-15 | 1958-09-23 | Electric Steel Foundry Co | Digger point and locking mechanism therefor |
US2896985A (en) * | 1956-08-20 | 1959-07-28 | Ingersoll Rand Co | Socket |
US2990634A (en) * | 1959-04-03 | 1961-07-04 | Esco Corp | Digger tooth |
US3275376A (en) * | 1964-04-17 | 1966-09-27 | Frank Prox Company Inc | Retainer for coal cutter bits |
US3285668A (en) * | 1963-11-20 | 1966-11-15 | Galion Jeffrey Mfg Co | Cutter bit holder |
US3318401A (en) * | 1964-02-04 | 1967-05-09 | Tel E Lect Products Inc | Auger head |
US3325926A (en) * | 1964-03-09 | 1967-06-20 | Mid Continent Steel Casting Co | Digger tooth and assembly for an excavating apparatus |
US3367727A (en) * | 1965-10-22 | 1968-02-06 | Abraham W. Ward | Oral surgery tool with interchangeable blades |
-
1966
- 1966-07-18 US US566120A patent/US3471954A/en not_active Expired - Lifetime
Patent Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1874783A (en) * | 1931-12-24 | 1932-08-30 | Mekeel Van Cortright | Digger tooth |
US2256488A (en) * | 1938-06-22 | 1941-09-23 | Daniels Murtaugh Company | Replaceable tooth for dippers |
US2263215A (en) * | 1940-11-09 | 1941-11-18 | Pettibone Mulliken Corp | Dipper tooth |
GB543733A (en) * | 1941-09-13 | 1942-03-10 | Larymore W | Improvements in or relating to couplings for rods, tubes, shafts or the like |
US2319464A (en) * | 1942-01-27 | 1943-05-18 | Massa Laurence | Tooth for excavating apparatus |
US2546457A (en) * | 1946-08-21 | 1951-03-27 | Ernie L Launder | Fastener for a tooth cap or the like |
US2852874A (en) * | 1954-06-15 | 1958-09-23 | Electric Steel Foundry Co | Digger point and locking mechanism therefor |
US2896985A (en) * | 1956-08-20 | 1959-07-28 | Ingersoll Rand Co | Socket |
US2990634A (en) * | 1959-04-03 | 1961-07-04 | Esco Corp | Digger tooth |
US3285668A (en) * | 1963-11-20 | 1966-11-15 | Galion Jeffrey Mfg Co | Cutter bit holder |
US3318401A (en) * | 1964-02-04 | 1967-05-09 | Tel E Lect Products Inc | Auger head |
US3325926A (en) * | 1964-03-09 | 1967-06-20 | Mid Continent Steel Casting Co | Digger tooth and assembly for an excavating apparatus |
US3275376A (en) * | 1964-04-17 | 1966-09-27 | Frank Prox Company Inc | Retainer for coal cutter bits |
US3367727A (en) * | 1965-10-22 | 1968-02-06 | Abraham W. Ward | Oral surgery tool with interchangeable blades |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3665623A (en) * | 1969-03-21 | 1972-05-30 | Western Rock Bit Co Ltd | Trencher tooth mounting |
US3738032A (en) * | 1970-09-29 | 1973-06-12 | Western Rock Bit Co Ltd | Digger tooth retainer |
US3826024A (en) * | 1972-01-06 | 1974-07-30 | G Petersen | Excavator tooth, holder and retainer |
US4360981A (en) * | 1977-12-12 | 1982-11-30 | Suncor Inc. | Lip and tooth combination for bucket wheel excavator |
US20110030248A1 (en) * | 2009-08-05 | 2011-02-10 | Charles Clendenning | Tooth assembly and related method for releasably coupling a tooth to an adapter |
US8347530B2 (en) | 2009-08-05 | 2013-01-08 | H&L Tooth Company | Tooth assembly and related method for releasably coupling a tooth to an adapter |
US9359744B2 (en) | 2009-08-05 | 2016-06-07 | H&L Tooth Company | Multipiece wear assembly |
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Legal Events
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---|---|---|---|
AS | Assignment |
Owner name: MERCATILE NATIONAL BANK AT DALLAS COMMERCE BANK, Free format text: MORTGAGE;ASSIGNORS:CMI CORPORATION;CMI INTERNATIONAL CORPORATION;CMI OIL CORPORATION;AND OTHERS;REEL/FRAME:004036/0894 Effective date: 19820910 Owner name: HIBERNIA NATIONAL BANK IN NEW ORLEANS THE Free format text: MORTGAGE;ASSIGNORS:CMI CORPORATION;CMI INTERNATIONAL CORPORATION;CMI OIL CORPORATION;AND OTHERS;REEL/FRAME:004036/0894 Effective date: 19820910 Owner name: COMMERCIAL BANK,N.A. Free format text: MORTGAGE;ASSIGNORS:CMI CORPORATION;CMI INTERNATIONAL CORPORATION;CMI OIL CORPORATION;AND OTHERS;REEL/FRAME:004036/0894 Effective date: 19820910 Owner name: BANK OF PENNSYLVAIA Free format text: MORTGAGE;ASSIGNORS:CMI CORPORATION;CMI INTERNATIONAL CORPORATION;CMI OIL CORPORATION;AND OTHERS;REEL/FRAME:004036/0894 Effective date: 19820910 Owner name: MANUFACTURERS HANOVER TRUST COMPANY Free format text: MORTGAGE;ASSIGNORS:CMI CORPORATION;CMI INTERNATIONAL CORPORATION;CMI OIL CORPORATION;AND OTHERS;REEL/FRAME:004036/0894 Effective date: 19820910 Owner name: NORTHERN TRUST COMPANY, THE Free format text: MORTGAGE;ASSIGNORS:CMI CORPORATION;CMI INTERNATIONAL CORPORATION;CMI OIL CORPORATION;AND OTHERS;REEL/FRAME:004036/0894 Effective date: 19820910 Owner name: REPUBLICBANK DALLAS,N.A. Free format text: MORTGAGE;ASSIGNORS:CMI CORPORATION;CMI INTERNATIONAL CORPORATION;CMI OIL CORPORATION;AND OTHERS;REEL/FRAME:004036/0894 Effective date: 19820910 Owner name: FIRST NATIONAL BANK OF CHICAGO, THE Free format text: MORTGAGE;ASSIGNORS:CMI CORPORATION;CMI INTERNATIONAL CORPORATION;CMI OIL CORPORATION;AND OTHERS;REEL/FRAME:004036/0894 Effective date: 19820910 Owner name: FIRST NATIONAL BANK AND TRUST COMPANY OF OKLAHOMA Free format text: MORTGAGE;ASSIGNORS:CMI CORPORATION;CMI INTERNATIONAL CORPORATION;CMI OIL CORPORATION;AND OTHERS;REEL/FRAME:004036/0894 Effective date: 19820910 Owner name: BANK OF AMERICA NATIONAL TRUST AND SAVINGS ASSOCIA Free format text: MORTGAGE;ASSIGNORS:CMI CORPORATION;CMI INTERNATIONAL CORPORATION;CMI OIL CORPORATION;AND OTHERS;REEL/FRAME:004036/0894 Effective date: 19820910 Owner name: FEDERAL DEPOSIT INSURANCE CORPORATION AS RECEIVER Free format text: MORTGAGE;ASSIGNORS:CMI CORPORATION;CMI INTERNATIONAL CORPORATION;CMI OIL CORPORATION;AND OTHERS;REEL/FRAME:004036/0894 Effective date: 19820910 Owner name: FIDELITY BANK N A. Free format text: MORTGAGE;ASSIGNORS:CMI CORPORATION;CMI INTERNATIONAL CORPORATION;CMI OIL CORPORATION;AND OTHERS;REEL/FRAME:004036/0894 Effective date: 19820910 Owner name: CONTINENTAL ILLINOIS NATIONAL BANK AND TRUST COMPA Free format text: MORTGAGE;ASSIGNORS:CMI CORPORATION;CMI INTERNATIONAL CORPORATION;CMI OIL CORPORATION;AND OTHERS;REEL/FRAME:004036/0894 Effective date: 19820910 |
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Owner name: FIRST NATIONAL BANK AND TRUST COMPANY OF OKLAHOMA Free format text: SECURITY INTEREST;ASSIGNORS:CMI INTERNATIONAL CORPORATION;CMI CORPORATION;CIMOIL CORPORATION;AND OTHERS;REEL/FRAME:004280/0861 Effective date: 19840301 |
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AS | Assignment |
Owner name: CONTINENTAL ILLINOIS NATIONAL BANK AND TRUST COMPA Free format text: ;ASSIGNORS:CMI CORPORATION;CMI INTERNATIONAL CORPORATION;CMIOIL CORPORATION;AND OTHERS;REEL/FRAME:004281/0001 Effective date: 19840301 Owner name: COMMERCE BANK Free format text: ;ASSIGNORS:CMI CORPORATION;CMI INTERNATIONAL CORPORATION;CMIOIL CORPORATION;AND OTHERS;REEL/FRAME:004281/0001 Effective date: 19840301 Owner name: FIDELITY BANK N.A. Free format text: ;ASSIGNORS:CMI CORPORATION;CMI INTERNATIONAL CORPORATION;CMIOIL CORPORATION;AND OTHERS;REEL/FRAME:004281/0001 Effective date: 19840301 Owner name: MANUFACTURERS HANOVER TRUST COMPANY Free format text: ;ASSIGNORS:CMI CORPORATION;CMI INTERNATIONAL CORPORATION;CMIOIL CORPORATION;AND OTHERS;REEL/FRAME:004281/0001 Effective date: 19840301 Owner name: BANK OF PENNSYLVANIA Free format text: ;ASSIGNORS:CMI CORPORATION;CMI INTERNATIONAL CORPORATION;CMIOIL CORPORATION;AND OTHERS;REEL/FRAME:004281/0001 Effective date: 19840301 Owner name: NORTHERN TRUST COMPANY, THE Free format text: ;ASSIGNORS:CMI CORPORATION;CMI INTERNATIONAL CORPORATION;CMIOIL CORPORATION;AND OTHERS;REEL/FRAME:004281/0001 Effective date: 19840301 Owner name: BANK OF AMERICA NATIONAL TRUST AND SAVINGS ASSOCIA Free format text: ;ASSIGNORS:CMI CORPORATION;CMI INTERNATIONAL CORPORATION;CMIOIL CORPORATION;AND OTHERS;REEL/FRAME:004281/0001 Effective date: 19840301 Owner name: REPUBLICBANK DALLAS, N.A. Free format text: ;ASSIGNORS:CMI CORPORATION;CMI INTERNATIONAL CORPORATION;CMIOIL CORPORATION;AND OTHERS;REEL/FRAME:004281/0001 Effective date: 19840301 Owner name: COMMERCIAL BANK, N.A. Free format text: ;ASSIGNORS:CMI CORPORATION;CMI INTERNATIONAL CORPORATION;CMIOIL CORPORATION;AND OTHERS;REEL/FRAME:004281/0001 Effective date: 19840301 Owner name: FIRST NATIONAL BANK AND TRUST COMPANY OF OKLAHOMA Free format text: ;ASSIGNORS:CMI CORPORATION;CMI INTERNATIONAL CORPORATION;CMIOIL CORPORATION;AND OTHERS;REEL/FRAME:004281/0001 Effective date: 19840301 Owner name: FIRST NATIONAL BANK OF CHICAGO Free format text: ;ASSIGNORS:CMI CORPORATION;CMI INTERNATIONAL CORPORATION;CMIOIL CORPORATION;AND OTHERS;REEL/FRAME:004281/0001 Effective date: 19840301 Owner name: MERCANTILE NATIONAL BANK AT DALLAS Free format text: ;ASSIGNORS:CMI CORPORATION;CMI INTERNATIONAL CORPORATION;CMIOIL CORPORATION;AND OTHERS;REEL/FRAME:004281/0001 Effective date: 19840301 |