US3729845A - Self contained retaining means for removable digging tooth - Google Patents
Self contained retaining means for removable digging tooth Download PDFInfo
- Publication number
- US3729845A US3729845A US00119533A US3729845DA US3729845A US 3729845 A US3729845 A US 3729845A US 00119533 A US00119533 A US 00119533A US 3729845D A US3729845D A US 3729845DA US 3729845 A US3729845 A US 3729845A
- Authority
- US
- United States
- Prior art keywords
- bar
- shank
- tooth
- 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
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
- ABSTRACT Self contained retaining means for removable digging teeth for digging buckets, wheels and the like The digging tooth has a hollow interior portion in the form of a socket fitting along the leading end of a shank at tached to and extending from the leading edge of a digger bucket.
- a retainer bar is carried by the shank for movement laterally of the shank and is held in position by a rubber insert in the bar and is retained to the shank when in its locked and release positions.
- the retainer bar has an upwardly opening slot positionable to register with a projection extending from the digger tooth into the socket. Access to the retainer bar for moving the bar into its locking and releasing positions is provided through the side walls of the tooth, to accommodate movement of the bar to position the slot into and out of alignment with the projection to release or hold the tooth to the shank.
- Removable digging teeth for digging buckets have heretofore been in common use. Such digging teeth, however, have relied upon wedges or other complicated forms of retainers, such as a pin of rubber sandwiched between two pieces of steel which must be completely removed to remove the digger tooth from its shank, or wedge and spring arrangements used on the buckets of smaller sized ditchers. These locking devices are all subject to frequent loss and breakage.
- a retainer bar retained to the shank for movement laterally of the shank, and positioned in its locked and released positions by the walls of the shank receiving socket in the digging tooth is provided, which is never removed and is accessible through the side walls of the socket of the shank to be driven to one side and allow tooth removal and to the other side to block removal of the tooth from the shank.
- a principal object of the invention is to provide a simple locking device for locking a digging tooth to its supporting shank, which is never removed from the shank.
- a further object of the invention is to improve upon the locking retainers for locking removable digging teeth in position on their shanks, arranged with a view toward retaining the locking retainer to its shank and utmost simplicity in construction and efficiency in locking the digging tooth to its shank.
- a further object of the invention is to improve upon the locking devices for locking digging teeth to their shanks heretofore in use by slidably mounting a retaining device in the shank, to be moved into and out of registry with a projection on the digging tooth, and to afford access to the retainer device to move the retainer device into its locking and release positions through the side walls of the digging tooth and held from removal from the shank by engagement with the side walls of the shank receiving socket of the digging tooth.
- FIG. I is a view in side elevation of a digging tooth and shank showing the leading end portion of a digging bucket with a shank mounted thereon.
- FIG. 2 is a front end view of the shank.
- FIG. 3 is a view in side elevation of the shank.
- FIG. 4 is a side elevational view of the retainer device
- FIG. 5 is a sectional view taken substantially along line V--V of FIG. 1, showing the retainer device in position to retain the digging tooth to its shank.
- FIG. I a fragment of the leading edge portion 10 of a digging bucket (not shown), which may be the digging bucket of a digging wheel, a scraper for a drag line or various other forms of buckets or scrapers commonly used for trenching, excavating and loading purposes.
- a series of shanks 11 are spaced along the leading edge of the digging bucket and extend forwardly therefrom for supporting digging teeth 12.
- the shank 11 has a thrust reacting surface 13 parallel to the bottom of the leading edge portion of the digger bucket and extending therealong a distance sufficient to accommodate said shank to take the lifting and twisting forces of digging.
- the thrust reaction surface 13 terminates at its forward end into a groove 15 extending across said shank and conforming to the leading edge of the digging bucket.
- the leading end portion of the shank is shown as being generally wedge-like in form, having a flat bottom surface 16 terminating at its leading end into an upwardly extending diverging retaining surface 17.
- the Wedge like leading end portion of the shank conforms to the form of a wedge-like socket 19 formed in the digging tooth 12 and opening to the rear end thereof (FIGS. 1 and 5).
- the shank 11 has a forwardly facing and upwardly opening recess 20 therein to receive a locking projection 21 of the digging tooth 12.
- the locking projection 21 extends into the socket 19 and forms an abutment or retainer for retaining the digging tooth 12 to said socket, in cooperation with a locking or retainer bar 23 mounted in the shank 11 for movement laterally thereof.
- the retainer bar 23 is guided in a rectangular slot 25, extending transversely of said shank and disposed forwardly of the projection 21, and having a bottom portion disposed beneath said projection.
- the projection 21 may be an integrally formed projection, or a roll pin or other form of pin, which may be driven through a circular hole 26 in the top wall of the digger tooth l2 and leading into the socket 19.
- the digging tooth 12 has a generally pointed or wedge-like leading end 27 terminating into a relatively short surface 29 perpendicular to a top surface SI) of the digging tooth and providing a relatively blunt leading end portion for penetrating into dirt and the like with a minimum amount of wear.
- the digging tooth is also provided with side walls 31 defining the outer vertical walls of the socket l9 and extending along opposite side walls of the shank II when the digging tooth is in place on the shank.
- Aligned holes 32 are provided in opposite side walls 31 of the socket 19, in alignment with the slot 25, but of a smaller diameter than the height of said slot, to afford access to the retainer bar 23, to enable said bar to be moved into a locked and released position by a drive pin (not shown) and the like.
- the retainer bar 23 may be made from metal, such as steel or any other suitable metal and is herein shown as generally rectangular in form although it need not necessarily be rectangular. Said retainer bar is shorter than the width of the shank 11 and never projects beyond said shank when in its locked and released positions.
- the retainer bar 23 has an upwardly opening notch 33 extending thereacross, closer to one end than the other, and of a width substantially equal to the width of the recess and wider than the locking projection 21.
- the upwardly opening notch 33 is closer to one end of the retainer bar than the other and is herein shown as being so positioned relative to the length of said retainer bar that when the retainer bar 23 is moved along the slot 25 to the extreme left-hand end thereof, the slot 33 will be out of registry with the recess 20.
- the projection or abutment 21 will, therefore, come into engagement with the rear face of said retainer bar on attempts to remove the digging tooth from its shank, or when forces are set up that would tend to move the digging tooth outwardly along its shank.
- the retainer bar 23 When, however, the retainer bar 23 is moved in a direction to engage the right-hand end thereof with the inner side of the side wall 31 of the socket 19 the notch 33 will register with the recess 20 and projection 21 and accommodate ready removal of the digging tooth from its shank.
- the retainer bar may, of course, be reversed in the slot 25, in which case the notch 33 will be at the right-hand end of the slot when in a locked position.
- the retainer bar 23 is shown as having a rectangular recess 36 therein opening to the lower end of said bar and forming a receptacle for a rubber pad 37, recessed therein and suitably secured thereto.
- the rubber pad 37 projects downwardly of the bottom surface of the retainer bar 23, as clearly shown in FIG. 4, and is sufficiently compressed when inserted in the slot 25 to hold the retainer bar in position in said'slot and to thereby hold said retainer bar in its locking and release positions.
- the retainer bar must thus be driven to one end or the other of its slot, when it is desired to move said bar to release the digging tooth, or positively retain said digging tooth in position.
- the retainer bar 23 is retained in the slot 25 when in its locked or release positions and thereby provides a self contained locking means which need never be removed from the shank except where it may be desired to replace the bar with a new one.
- the inner side walls of he socket 19 serve as stops and retainers for the retainer bar and as a positioning means therefor, limiting movement of the bar into either its locking or its release positions, but still affording access to the bar from either end thereof through either of the aligned access holes 32.
- the retainer bar 23 thus effectively prevents unauthorized removal of the tooth from its supporting shank and besides remaining in the shank at all times, accommodates tooth removal by a simple operation of driving the retainer bar to one extreme side of the shank, limited by the interior side walls of the socket 19.
- a releasable retaining means for a digging tooth or the like including a shank projecting from the leading end of a digging bucket, a digging tooth releasably versely disgosed recess; b. a retainer ar received in said recess for transverse reciprocal sliding movement therein, which retainer bar has a notch therein; said digging tooth having a projection extending into said socket and disposed rearwardly of said retainer bar in interfering relationship with a portion of the latter when said digging tooth is mounted on said shank;
- said digging tooth having a pair of aligned openings communicating with said socket and also communicating with respective opposite ends of said recess when said digging tooth is mounted on said shank, said openings permitting insertion of a tool into either end of said recess for forcibly sliding said retainer bar in both directions thereby alternately to position said notch and said portion of the retainer bar in alignment with said projection, said openings being shaped so as to be abutted by the ends of said retainer bar thereby to prevent removal of the latter from said recess when said digging tooth is mounted on said shank.
- the means for holding said retainer bar in position comprises a resilient insert extending along said bar and outwardly beyond one side thereof and compressively engaging a wall of said recess to retain said bar in position therein by the force created by the inherent tendency of said insert to expand.
- a resilient insert extends along one side of said bar and outwardly therefrom to retain said bar in position by the expansive force of said insert
- notch in said bar registrable with said projection is disposed toward one end of said bar to register with said projection when said bar is at one end of said recess and to accommodate said bar to register with and interfere with outward movement of said projection when at the opposite end of said recess.
Landscapes
- 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)
- Shovels (AREA)
Abstract
Description
Claims (4)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11953371A | 1971-03-01 | 1971-03-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3729845A true US3729845A (en) | 1973-05-01 |
Family
ID=22384922
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00119533A Expired - Lifetime US3729845A (en) | 1971-03-01 | 1971-03-01 | Self contained retaining means for removable digging tooth |
Country Status (5)
Country | Link |
---|---|
US (1) | US3729845A (en) |
BR (1) | BR7201202D0 (en) |
DE (1) | DE2209861A1 (en) |
FR (1) | FR2128479B1 (en) |
GB (1) | GB1359094A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4949481A (en) * | 1989-08-04 | 1990-08-21 | Deere & Company | Digging tooth assembly |
US4986011A (en) * | 1989-04-17 | 1991-01-22 | Stapel B.V. | Cutting device with removable tools |
US5018283A (en) * | 1989-08-04 | 1991-05-28 | Deere & Company | Loader bucket tooth |
US5152087A (en) * | 1990-10-09 | 1992-10-06 | A. M. Logistic Corporation | Holding clamp and reversible earth working cutting teeth |
US5782019A (en) * | 1995-11-29 | 1998-07-21 | H & L Tooth Company | High strength earth working tooth |
WO2014086896A3 (en) * | 2012-12-05 | 2014-07-31 | Thyssenkrupp Industrial Solutions Ag | Sprocket for a bucket, particularly for a bucket-wheel excavator |
US20190118416A1 (en) * | 2010-05-13 | 2019-04-25 | Nike, Inc. | Device for displaying image on apparel |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2618873A (en) * | 1946-04-26 | 1952-11-25 | Morgan D Hostetter | Digger tooth construction |
US2994140A (en) * | 1956-05-14 | 1961-08-01 | Tooth H & L Co | Point locking mechanism for digger teeth |
GB1071493A (en) * | 1963-04-03 | 1967-06-07 | P & V Mining & Engineering Ltd | Improvements in or relating to cutter pick securing |
US3330055A (en) * | 1964-11-10 | 1967-07-11 | Petersen Anita E | Resilient retaining means for jacketed tooth |
GB1115411A (en) * | 1963-11-08 | 1968-05-29 | Matthias Spencer & Sons Ltd | Improvements in or relating to tool holding devices |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1148687A (en) * | 1955-05-13 | 1957-12-12 | H And L Tooth Company | Pin or flexible assembly axis applicable in particular to a lifting bucket |
US3708895A (en) * | 1970-04-29 | 1973-01-09 | Florida Machine & Foundry Co | Replaceable tooth assembly |
-
1971
- 1971-03-01 US US00119533A patent/US3729845A/en not_active Expired - Lifetime
-
1972
- 1972-03-01 BR BR1202/72*[A patent/BR7201202D0/en unknown
- 1972-03-01 FR FR7207077A patent/FR2128479B1/fr not_active Expired
- 1972-03-01 GB GB965772A patent/GB1359094A/en not_active Expired
- 1972-03-01 DE DE19722209861 patent/DE2209861A1/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2618873A (en) * | 1946-04-26 | 1952-11-25 | Morgan D Hostetter | Digger tooth construction |
US2994140A (en) * | 1956-05-14 | 1961-08-01 | Tooth H & L Co | Point locking mechanism for digger teeth |
GB1071493A (en) * | 1963-04-03 | 1967-06-07 | P & V Mining & Engineering Ltd | Improvements in or relating to cutter pick securing |
GB1115411A (en) * | 1963-11-08 | 1968-05-29 | Matthias Spencer & Sons Ltd | Improvements in or relating to tool holding devices |
US3330055A (en) * | 1964-11-10 | 1967-07-11 | Petersen Anita E | Resilient retaining means for jacketed tooth |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4986011A (en) * | 1989-04-17 | 1991-01-22 | Stapel B.V. | Cutting device with removable tools |
US4949481A (en) * | 1989-08-04 | 1990-08-21 | Deere & Company | Digging tooth assembly |
EP0411486A1 (en) * | 1989-08-04 | 1991-02-06 | Deere & Company | Digging tooth |
US5018283A (en) * | 1989-08-04 | 1991-05-28 | Deere & Company | Loader bucket tooth |
US5152087A (en) * | 1990-10-09 | 1992-10-06 | A. M. Logistic Corporation | Holding clamp and reversible earth working cutting teeth |
US5782019A (en) * | 1995-11-29 | 1998-07-21 | H & L Tooth Company | High strength earth working tooth |
US20190118416A1 (en) * | 2010-05-13 | 2019-04-25 | Nike, Inc. | Device for displaying image on apparel |
WO2014086896A3 (en) * | 2012-12-05 | 2014-07-31 | Thyssenkrupp Industrial Solutions Ag | Sprocket for a bucket, particularly for a bucket-wheel excavator |
Also Published As
Publication number | Publication date |
---|---|
DE2209861A1 (en) | 1972-09-14 |
FR2128479A1 (en) | 1972-10-20 |
GB1359094A (en) | 1974-07-10 |
FR2128479B1 (en) | 1976-06-11 |
BR7201202D0 (en) | 1973-06-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: FIRST AMERICAN NATIONAL BANK OF NASHVILLE, TENNESS Free format text: SECURITY INTEREST;ASSIGNOR:BARBER-GREENE COMPANY, A CORP. OF DE.;REEL/FRAME:004748/0440 Effective date: 19861229 Owner name: FIRST AMERICAN NATIONAL BANK OF NASHVILLE, NASHVIL Free format text: SECURITY INTEREST;ASSIGNOR:BARBER-GREENE COMPANY, A CORP. OF DE.;REEL/FRAME:004748/0440 Effective date: 19861229 |
|
AS | Assignment |
Owner name: BARBER-GREENE COMPANY, ILLINOIS Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:FIRST AMERICAN NATIONAL BANK OF NASHVILLE;REEL/FRAME:005000/0045 Effective date: 19880606 Owner name: BARBER-GREENE COMPANY, 400 NORTH HIGHLAND, AURORA, Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:FIRST AMERICAN NATIONAL BANK OF NASHVILLE;REEL/FRAME:005000/0045 Effective date: 19880606 |
|
AS | Assignment |
Owner name: FIRST NATIONAL BANK OF CHICAGO, THE Free format text: SECURITY INTEREST;ASSIGNORS:BARBER-GREENE COMPANY;ROADTEC, INC.;TRENCOR JETCO, INC.;AND OTHERS;REEL/FRAME:005357/0010 Effective date: 19900516 |
|
AS | Assignment |
Owner name: CITIZENS AND SOUTHERN TRUST COMPANY (GEORGIA), GEO Free format text: AMENDMENT TO A PREVIOUSLY RECORDED SECURITY AGREEMENT DATED APRIL 27, 1989;;ASSIGNORS:BARBER-GREENE COMPANY;ROADTEC, INC.;TRENCOR JETCO, INC.;REEL/FRAME:006113/0075 Effective date: 19910301 Owner name: FIRST NATIONAL BANK OF CHICAGO, THE, ILLINOIS Free format text: AMENDMENT TO A PREVIOUSLY RECORDED SECURITY AGREEMENT DATED APRIL 27, 1989;;ASSIGNORS:BARBER-GREENE COMPANY;ROADTEC, INC.;TRENCOR JETCO, INC.;REEL/FRAME:006113/0075 Effective date: 19910301 |
|
AS | Assignment |
Owner name: FIRST NATIONAL BANK OF CHICAGO, N.A., THE, ILLINOI Free format text: TERMINATION & RELEASE OF SECURITY INTEREST IN PATENTS;ASSIGNOR:NATIONSBANK OF GEORGIA, N.A. (F/K/A CITIZENS AND SOUTHERN TRUST COMPANY, N.A.);REEL/FRAME:007603/0227 Effective date: 19940720 Owner name: ASTEC INDUSTRIES, INC., TENNESSEE Free format text: TERMINATION & RELEASE OF SECURITY INTEREST IN PATENTS;ASSIGNOR:NATIONSBANK OF GEORGIA, N.A. (F/K/A CITIZENS AND SOUTHERN TRUST COMPANY, N.A.);REEL/FRAME:007603/0227 Effective date: 19940720 |