Tooth assembly and related method for releasably coupling a tooth to an adapter

A tooth assembly including an adapter and a tooth. The adapter has a nose portion with a first predetermined configuration. The tooth is assembled onto the adapter nose portion by relative longitudinal movement. The tooth defines a blind cavity having a second predetermined configuration and opening to a rear of the tooth. The second predetermined configuration defined by the tooth cavity is greater than the first predetermined configuration defined by the adapter nose portion such that a space is provided between the adapter nose portion and the blind cavity when the adapter and tooth are arranged in operable combination relative to each other. A securement member releasably maintains the tooth and the adapter nose portion in operable combination relative to each other. The securement member fills the space defined between the tooth cavity and the adapter nose portion to resist longitudinal movement between the tooth and the adapter nose portion. A related method for releasably coupling a tooth to an adapter is also disclosed.

FIELD OF THE INVENTION DISCLOSURE

This invention disclosure generally relates to a tooth assembly and, more specifically, to a tooth assembly including an adapter and a tooth arranged in releasably coupled relation relative to each other and to a related method for releasably coupling the tooth and adapter.

BACKGROUND

Excavating or digging equipment used in mining, construction and a myriad of other ground engaging operations typically includes a series of spaced apart tooth assemblies which project forward and serve to break up material to be gathered into a bucket of such digging equipment. Such tooth assemblies are typically arranged in side-by-side and horizontally adjacent relation relative to each other.

Such tooth assemblies can take a myriad of shapes and sizes. As used herein, the phrases “tooth” and “wear part” are intended to include lip protectors, lip shrouds, rippers and other ground engaging tools including, but not limited to, ground engaging teeth. For exemplary purposes, this invention disclosure is illustrated and described for use with a two-piece ground engaging tooth assembly. As mentioned, however, the present invention is equally applicable to other ground engaging equipment releasably secured to an edge or lip of a bucket or related digging equipment.

The art recognized long ago the advantages to be gained by constructing each tooth assembly as a two-part system. That is, the art recognized the advantages to be obtained by connecting a tooth or tool to an adapter or support which, in turn, is connected to the bucket of excavating equipment. Typically, the adapter or support is provided with a base portion which is configured for attachment to the forward edge or lip of a bucket and a free ended nose portion. The tooth is typically provided with a blind cavity or socket whereby allowing the tooth to longitudinally fit over and along at least a lengthwise section of the adapter nose portion. The size of the adapter and tooth vary depending upon the particular digging application. Various types of pinning systems have been used to releasably interconnect the tooth and adapter in operable combination relative to each other.

In some operations, such tooth assemblies are subjected to highly abrasive conditions and, thus, experience considerable and rapid wear. Unless the conjuncture between the component parts is properly fitted, wear problems, especially in the socket or cavity of the replacement part and along the nose portion of the adapter, can result. Moreover, the relatively high forces developed during some digging operations furthermore add to the rapid wear of the component parts of the tooth assembly. Additionally, the pinning systems used to interconnect the tooth and adapter can be harmed or even destroyed by excessive loading in field applications which can result in inadvertent separation of the tooth from the adapter nose portion.

Besides wear in the socket or cavity area of the replacement part or tooth, the adapter nose portion can also become worn from use in the field. Accordingly, and when a new replacement part is fitted to a worn nose portion of an adapter, clearances can exist between the adapter nose portion and the digging tooth. As a result, there can be significant movement between the new replacement part and the nose portion of the adapter. This movement furthermore wears on the nose portion of the adapter and increases the loads upon conventional pinning systems due to excessive tooth movements.

In service, and although specific steps can be taken during fabrication of the wear part to prolong their usefulness, a forward cutting edge of the replacement part sometimes quickly wears and becomes dull and, thus, inefficiencies in the digging operation develop thereby requiring replacement of such parts. As mentioned, the two-part construction of such a tooth assembly advantageously allows the tooth to be replaced independent of the adapter. Depending upon conditions, an adapter can be successfully equipped with anywhere from five to thirty replacement teeth to maintain a sharp penetrating edge for the tooth assembly. In the field, replacement of worn teeth is a common and sometimes a daily experience.

Removing or separating a worn or otherwise broken tooth from its support can involve a tedious and often difficult task of pounding or prying an elongated retaining pin from registering apertures in the tooth and adapter. Removal of the retaining pin is typically effected by using a hammer to manually and endwise force the retaining pin from the apertures in the tooth and adapter. Of course, with larger tooth assemblies, the retaining pins are proportionately sized larger thereby adding to the manual effort and, thus, increasing the time and effort involved to effect digging tooth replacement and/or repair. Problems involving the hammer missing the punch or other tool used to removably pound the retaining pin and hitting the hand of the operator are well known. Dangerous splintering of the metal parts used to drive the retaining pin from between the tooth and adapter can also result. Of course, similar problems exist when the retaining pin is again pounded into the apertures to effect reattachment of the replacement part to the adapter. The unavailability of appropriate tools, i.e., hammers and punches, in the field is also a consistent and well known problem.

Many tooth assemblies arrange the retaining pin along a generally horizontal axis. When the tooth assemblies are mounted in side-by-side proximate relation relative to each other across the bucket edge, however, the horizontal disposition of the retainer pin for each tooth assembly only adds to the time and effort required to initially remove the pin, whereby allowing for removal/repair of the worn/broken part of the two-part system and, subsequent reinsertion of the pin into the registered apertures in the replacement part and adapter. Some operators utilize specially designed tools to facilitate removal of the horizontal pins.

It is also known to arrange the retaining pin in a generally vertical orientation. While advantageously enhancing access to the retaining pin, such retaining devices are more susceptible to the forces applied thereto as a result of the generally vertical movements of the bucket during a digging/excavating operation. Moreover, with a vertically oriented pin system, the lower hole or aperture in the replacement part of the two-part digging system is more exposed—as compared to a horizontal pinning system—to the ground surface over which the digging implement or bucket moves during a digging operation.

Typically, changing to a unique tooth design can create considerable hardship on original equipment manufacturers, part distributors, and end users since a new style adapter most likely must also be utilized to accommodate the innovative tooth and attachment device. This can require costly maintenance of multiple part inventories throughout the entire parts distribution system. This can also cause confusion as to which new tooth and pin will fit what adapter, which tool is needed, etc. Those concerns listed above at least partially explains the reluctance of some manufacturers and even end-users to accept and adopt a newer type of tooth assembly, even after considering the advantages such a new tooth assembly design can offer.

Thus, there is a need and continuing desire for a digging tooth assembly wherein the wear part or tooth and adapter are releasably maintained in operable combination relative to each other and for a related method for releasably coupling the tooth to an adapter. Also, there is a need and continuing desire for a tooth assembly wherein the wear part can be removed from and reassembled to the adapter without requiring the use of a hammer. Moreover, there is an even greater need for a new tooth design that can manifest numerous advantages for the manufacturer of the tooth and yet be utilized in combination with either new style adapters or with the existing population of older style adapters in the field.

SUMMARY

In view of the above, and in accordance with one aspect, there is provided a tooth assembly having a longitudinal axis and includes a tooth and adapter. The tooth has upper and lower slanted walls and a rearwardly opening socket formed therein. The tooth socket has a first cross-sectional configuration defined, at least partially by a pair of opposed sides laterally separated by a predetermined distance. At least one of the sides of the tooth socket has a generally planar configuration. The adapter has a nose portion configured to be longitudinally received and accommodated within the tooth socket. The adapter nose portion has a second cross-sectional configuration which proximate but is smaller than the cross-sectional configuration of the tooth socket such that, when the when the adapter nose portion and tooth are arranged in operable combination relative to each other, a relief is defined between confronting surfaces on the tooth socket and adapter nose portion. The adapter nose portion further defines a recess for laterally accommodating a free ended lock carried by the tooth and projecting toward the longitudinal axis of the tooth assembly for releasably coupling the tooth and adapter in operable combination relative to each other. A securement member is insertable into the relief defined between the confronting surfaces on the tooth socket and adapter nose portion so as to at least partially fill the relief and urge the tooth in a lateral direction relative to the adapter nose portion thereby forcibly maintaining the lock on the tooth securely within the recess in the adapter whereby inhibiting longitudinal translation of the tooth relative to the adapter as long as the lock retained within the recess defined by the adapter nose portion.

In one form, the lock on the tooth is a lug formed integral with the tooth. In another form, the lock carried by the tooth is assembled to the tooth. Preferably, a lower wall of the tooth defines a bore extending through to the tooth socket so as to accommodate endwise passage of a tool from an underside of the securement member whereby facilitating removal of the securement member from operable engagement with the tooth and adapter.

In one form, the securement member has a shank portion with opposed and generally parallel sides. To guide and facilitate insertion of the securement member into operable combination with and between confronting surfaces on the adapter nose portion and tooth socket, a key and keyway are provided between the securement member and a confronting side surface of the tooth socket. To advantageously promote removal of the securement member from between the digging tooth and adapter nose portion, the shank portion of the securement member disposed between the tooth and adapter nose portion preferably has an arcuate configuration between opposed ends thereof. The configuration of and the lateral distance between the shank portion sides of the securement member can vary between different securement members.

A secondary lock is preferably provided in combination with the tooth assembly for releasably maintaining the securement member in position between the tooth and the adapter nose portion. Magnetic material can be arranged in combination with the securement member to inhibit inadvertent displacement thereof from between the tooth and adapter nose portion. In one form, the secondary lock is designed as a detent mechanism. In another form, an insert carried by the tooth with a portion of the insert being arranged in operable combination with and serves to maintain the securement member in position between the tooth and the adapter nose portion. In still another form, the secondary lock includes magnetic material.

According to another aspect, there is provided a tooth assembly having a longitudinal axis and which includes an adapter and a tooth. The adapter has a nose portion with top and bottom angled surfaces converging toward a free end thereof and a pair of sides which are laterally separated by a first predetermined distance. The adapter nose portion further defines a recess opening to both sides of the nose portion of the adapter. The tooth is assembled onto the nose portion of the adapter by relative longitudinal movement. The tooth has an upper wall and a lower wall and a blind cavity opening to a rear of the tooth. The tooth cavity has top and bottom angled surfaces, which proximate the respective top and bottom angled surfaces on the nose portion of the adapter, and a pair of generally parallel side surfaces extending between the top and bottom surfaces and which are laterally separated by a second predetermined distance. The second predetermined distance is greater than the first predetermined distance. At least one side surface of the tooth cavity has a generally planar configuration. A free ended lock on the tooth extends toward the tooth assembly axis and aligns with and extends into the recess in the nose portion of the adapter when the adapter and tooth are longitudinally assembled relative to each other. A securement member is insertable between and in bearing contact with both the side surface of the tooth cavity and the respective side of the nose portion of the adapter to releasably maintain the lock on the tooth within the recess in the adapter so as to prevent longitudinal movement of the tooth and adapter relative each other.

In one form, an opening is provided in the upper wall of the tooth. The opening extends into the tooth cavity and is arranged adjacent to the side surface of the blind cavity opposite from the lock for allowing at least a portion of said securement member to pass downwardly therethrough and into operable combination between and in bearing contact with a side of the adapter and an adjacent side surface defining the cavity in the tooth. As such, the lock on the tooth is urged into the recess in the adapter so as to prevent longitudinal movement of the tooth and adapter relative each other.

In one embodiment, the lock on the tooth is a lug that is formed integral with the tooth. In another embodiment, the lock is formed as an insert carried by the tooth. In a preferred embodiment, the lower wall of the tooth defines a bore for accommodating endwise passage of a tool used to facilitate removal of said securement member from operable engagement between said tooth and adapter.

In one form, the securement member has a pair of parallel sides. A key and keyway on the tooth and securement member facilitate insertion of the securement member between the tooth and adapter nose portion. Moreover, and to facilitate removal of the securement member from between the tooth and adapter nose portion, at least that portion of the securement member extending between the tooth and adapter nose portion has an arcuate configuration between the ends thereof.

Preferably, a secondary lock is provided for releasably maintaining the securement member in operable combination with the adapter and tooth. In one embodiment, such secondary lock is designed as detent mechanism. In another form, the securement member includes magnetic material for releasably maintaining said securement member in position between said tooth and the adapter nose portion. In another embodiment, an insert, carried by the tooth opposite from the lock on the tooth, is arranged in operable combination with the securement member for releasably maintaining the securement member between the adapter and tooth. In one form, such insert is maintained in place by magnetic material.

According to another aspect, there is provided a tooth assembly having a longitudinal axis and includes an adapter and a tooth. The adapter has a base portion adapted to be secured to excavating equipment and a forwardly extending nose portion with a first predetermined configuration. The tooth is assembled onto the adapter nose portion by relative longitudinal movement. The tooth defines a blind cavity opening only to a rear of the tooth. The tooth cavity has a second predetermined configuration. Notably, in this form, the second predetermined configuration defined by the tooth cavity is greater than the first predetermined configuration defined by the adapter nose portion such that a relief is defined between one side of the adapter nose portion and a confronting side surface of the tooth cavity when the adapter and tooth are arranged in operable combination relative to each other. A lock on the tooth releasably maintains the tooth and the adapter nose portion in operable combination relative to each other. The lock projects toward the longitudinal axis of the tooth assembly and extends into a recess defined on the adapter nose portion when the adapter nose portion and tooth are arranged in operable combination relative to each other. A securement member is insertable between and at least partially fills the space between the side surface of the tooth cavity and the confronting side of the adapter nose portion and urges the lock into the recess defined in the adapter nose portion whereby resisting longitudinal movement between the tooth and the adapter nose portion as long as the securement member is arranged between the tooth and adapter nose portion.

In one form, lock on the tooth is formed as an integral free ended lug extending toward the longitudinal axis of the tooth assembly. Alternatively, however, the lock on the tooth can be formed as an insert carried by the tooth. In one form, the lower wall of the tooth defines a bore arranged adjacent to one of the side surface of and extends through to the blind cavity for accommodating endwise passage of a tool used to facilitate removal of the securement member from operable engagement with the tooth and adapter.

Preferably, a lengthwise portion of the securement member extends across an entire side of the adapter when the securement member is fully inserted into an operational position. In one embodiment, the portion of the securement member insertable between the tooth and adapter nose portion has an arcuate configuration between opposed ends thereof. Preferably, a key and keyway defined by the tooth and securement member serve to guide the securement member into operable position between the tooth and adapter. The securement member preferably has two laterally separated and generally parallel sides.

According to still another aspect, there is provided a tooth assembly having a longitudinal axis and includes an adapter and a tooth. The adapter has a base portion adapted to be secured to excavating equipment and a forwardly extending nose portion having a first predetermined configuration. The tooth is assembled onto the nose portion of the adapter by relative longitudinal and lateral movements. The tooth defines a blind cavity opening only to a rear of the tooth, with the blind cavity having a second predetermined configuration defined by at least one side extending generally parallel to the longitudinal axis of the tooth assembly. The second predetermined configuration of the tooth cavity is larger than the first predetermined configuration on the adapter nose portion such that, when said adapter nose portion and tooth are arranged in operable combination relative to each other, a space is defined between said at least that side on the tooth cavity extending generally parallel to the longitudinal axis of the tooth assembly and a confronting surface on the nose portion of the adapter. A securement member is insertable in a direction extending generally perpendicular to the longitudinal axis of the tooth assembly such that a portion of the securement member at least partially fills the space defined between that one side on the tooth cavity extending generally parallel to the longitudinal axis of the tooth assembly and a confronting surface on the nose portion of the adapter to positively urge the tooth in a direction whereby allowing remaining configurations on the adapter nose portion and tooth cavity to resist longitudinal movement between the tooth and the adapter nose portion as long as the securement member is disposed between the adapter nose portion and tooth.

In this embodiment, both sides of the adapter nose portion angle inwardly toward the longitudinal axis of the tooth assembly such that the lateral cross-sectional configuration of the adapter nose portion decreases as measured from the free end of the adapter. In one form, at least a portion of the securement member has a wedge shaped design. In this alternative design, the other side surface of the blind cavity defined by the tooth angles inwardly toward the longitudinal axis of the tooth assembly such that the lateral width between the side surfaces of the blind cavity is greater at a closed end of the cavity than at an open end of the cavity.

According to still another aspect, there is provided a method for releasably coupling a tooth to an adapter. The tooth has converging upper and lower walls and a rearwardly opening socket formed therein. The tooth socket has a first predetermined configuration. The adapter has a nose portion adapted to be longitudinally received and accommodated within the socket defined by the tooth. The adapter nose portion has a second predetermined configuration which compliments but is smaller than the predetermined configuration defined by the tooth socket. As such, and when the tooth and adapter nose portion are arranged in operable combination relative to each other, a space is defined between the tooth cavity and the adapter nose portion. The method for releasably coupling the tooth and adapter includes the step of: inserting a securement member between confronting side surfaces on the tooth socket and adapter nose portion so as to couple the tooth and adapter in operable combination relative to each other and to inhibit longitudinal translation of the tooth relative to the adapter as long as the securement member is retained between the tooth and the nose portion of the adapter.

In one form, the method for releasably coupling the tooth to the adapter includes the further step of: angling the tooth in a first sideways direction sufficiently to permit longitudinal translation of a free end of the adapter into the tooth socket. Moreover, the method for releasably coupling the tooth to the adapter can furthermore include the step of: angling the tooth in a second sideways direction sufficiently align the tooth and adapter along a longitudinal axis defined by the tooth assembly. Preferably, the method for releasably coupling the tooth to an adapter furthermore includes the step of: using a secondary locking apparatus for releasably securing said tooth and adapter in operable combination relative to each other.

DETAILED DESCRIPTION

While this invention disclosure is susceptible of embodiment in multiple forms, there is shown in the drawings and will hereinafter be described preferred embodiments, with the understanding the present disclosure sets forth exemplifications of the disclosure which are not intended to limit the disclosure to the specific embodiments illustrated and described.

Referring now to the drawings, wherein like reference numerals indicate like parts throughout the several views, there is shown inFIG. 1a series of two-part digging tooth assemblies, with each assembly being identified generally by reference numeral10. In the illustrated embodiment, the tooth assemblies are arranged in generally horizontal and proximate relation relative to each other across an edge or lip12of an implement such as a bucket or the like14. During operation, the bucket or shovel14, to which each tooth assembly is attached, moves both vertically and horizontally. Each tooth assembly10extends forward from the implement edge or lip12. Preferably, each tooth assembly10is substantially identical in construction. Accordingly, only one tooth assembly will be discussed in detail.

As shown inFIG. 2, each tooth assembly10has a longitudinal axis16and includes a replaceable wear part20and an adapter22. In the illustrated embodiment, the replaceable wear part20is designed as a digging tooth. As mentioned, however, the wear part of assembly10can take a myriad of different designs other than a tooth, i.e., a ripper, lip shroud, wear cap, etc. without detracting or departing from the true spirit and scope of this invention disclosure.

In the embodiment illustrated by way of example inFIG. 3, the adapter22has an elongated and preferably unitary construction and includes a base portion24and an elongated nose portion26projecting forward from the base portion24. To add to the wearability thereof, adapter22is preferably formed from a ferrous metal, i.e., steel or a steel alloy. The adapter base portion24is configured for suitable attachment to the edge or lip12of the bucket or implement14through any suitable and well known means including fasteners, welding, etc.

The adapter nose portion26can take any of a myriad of different designs without detracting or departing from the true spirit and scope of this invention disclosure. Suffice it to say, the configuration of the adapter nose portion26illustrated by way of example inFIGS. 3,4and17is such that a longitudinal cross-sectional configuration of the adapter nose portion26increases as measured rearwardly from a free end of the adapter nose portion26. In the example selected for illustrative purposes inFIG. 3, the adapter nose portion26has top and bottom angled surfaces32and34which converge relative to each other and toward a free end35of the adapter22. In the embodiment shown inFIGS. 2 and 4, the adapter nose portion26furthermore includes a pair of laterally spaced sides36and38which, in the form used as an example, extend generally parallel to each other. As shown inFIG. 4, the sides36and38of the adapter nose portion22are laterally separated or spaced apart by a predetermined transverse distance PD1. Suffice it to say, the adapter nose portion26has a first predetermined configuration.

As shown inFIG. 4, the adapter or support22defines a recess or bore39disposed toward a rear of the nose portion26and extends generally normal to the tooth assembly axis16. In the form shown inFIG. 4, recess39is defined by a throughbore39′ which opens to opposed sides36and38of the adapter nose portion26. In the illustrated embodiment, recess39has a closed marginal edge. In the illustrated embodiment, the closed marginal edge of the recess39has a generally elliptical cross-sectional configuration which is elongated in a fore-and-aft direction but it could have other cross-sectional configurations i.e, circular, square, triangular, etc. without detracting or departing from the true spirit and scope of this invention disclosure.

In the example shown inFIG. 3, the wear part or tooth20of assembly10has an longitudinally elongated wedge shape between a forward cutting edge or end40, operative to engage the material to be worked, and a rear end42thereof. Like adapter22, tooth20is preferably formed from a ferrous metal, i.e., steel or a suitable steel alloy. Preferably, tooth20has a unitary design including an upper slanted wall44and a lower slanted wall46arranged in converging relation toward the end40of the tooth20. As shown inFIG. 2, tooth20further includes a pair of side walls48and48′ extending between walls44and46. Of course, the exterior sides of tooth20can take a myriad of different shapes from that shown without detracting or departing from the true spirit and scope of this disclosure.

As shown inFIG. 4, the wear part or tooth20defines an open-ended blind cavity or socket50for longitudinally receiving and accommodating at least a lengthwise section of the adapter nose portion26. Suffice it to say, socket50has a predetermined configuration which compliments or proximates the configuration of the adapter nose portion26. In the illustrated form, the socket50has a larger cross-sectional configuration toward an open end than toward a closed end thereof. In the illustrated embodiment, the tooth cavity or socket50has top and bottom angled surfaces52and54(FIG. 3) which compliment the top and bottom angled surfaces32and34, respectively, on the adapter nose portion26and which converge relative to each other. The tooth cavity or socket50furthermore includes a pair of laterally spaced side surfaces56and58which, in one form, extend generally parallel to each other and to the longitudinal axis16of tooth assembly10. Suffice it to say, the adapter nose portion26and tooth cavity or socket50have complimentary cross-sectional designs and/or configurations. It should be appreciated, however, the design, shape and/or configurations of the adapter nose portion26and tooth cavity or socket50can be different from that shown for illustrative purposes without detracting or departing from the true spirit and scope of this invention disclosure.

As shown inFIG. 4, the side surfaces56and58of cavity50are laterally separated or spaced apart by a predetermined transverse distance PD2; with the predetermined lateral distance PD2being greater than the predetermined lateral distance PD1defined between the sides36and38of the adapter nose portion22. That is, the predetermined configuration of the tooth cavity50is larger in cross-section than the predetermined configuration defined by the adapter nose portion26. As such, and as shown inFIG. 4, when the adapter nose portion26is operably assembled within the tooth cavity50, a space or relief59is defined between one side of the adapter nose portion26and the confronting side surface58of cavity50and longitudinally opens to a rear of the wear part or tooth20.

In the embodiment shown inFIGS. 4 and 5, a free ended lock60extends into the socket50and toward the tooth assembly axis16. The lock60has a cross-sectional configuration which is equal to or smaller than the cross-section of the recess39defined by the adapter nose portion26. Notably, the lateral distance separating the free end of lock60from the opposed side surface58of tooth cavity50is greater than the lateral distance separating opposed sides36and38of the adapter nose portion26whereby permitting longitudinal translation of the adapter nose portion26relative to the tooth socket50and longitudinally past lock60. In the illustrated embodiment, lock60is a lug62formed integral with the tooth20. As shown inFIG. 4, when the adapter nose portion26and tooth50are arranged in operable combination with each other, lock60is in registry with and extends into the recess39defined by the adapter nose portion26. As such, the working loads and forces encountered by the tooth assembly10during operation are advantageously transferred from the digging tooth20to the adapter22through the lock60extending into the recess39on the adapter nose portion26.

In the alternative embodiment illustrated inFIG. 4A, a lock60A extends into the tooth cavity50and toward axis16but is formed independent of tooth20. As shown inFIG. 4A, tooth20is provided with a bore45in the side wall48forwardly from the rear end42of the tooth20and which opens to the tooth cavity50. Preferably, bore45has a closed marginal edge defined by tooth20. Bore45is located in general registry with the recess39defined by the adapter nose portion26when the tooth20is fitted in operable combination on the adapter nose portion26.

In this alternative embodiment, lock60A includes a shank portion60B and an axially aligned head portion60C. Shank portion60B of lock60A is received and secured against axial movements within bore45in the tooth side wall48through any suitable and well known means. As shown inFIG. 4A, the head portion60C of lock60A extends into the socket50in general registry with the adapter nose portion recess39when the tooth20and adapter nose portion26are in operable combination relative to each other. Preferably, the cross-sectional configuration of head portion60C on lock60A is equal to or smaller than the cross-section of the recess39defined by the adapter nose portion26. Like lock60, the lateral distance separating the free end of the head portion60C from the opposed side surface58of tooth cavity50is greater than the lateral distance separating opposed sides36and38of the adapter nose portion26whereby permitting longitudinal translation of the adapter nose portion26relative to the tooth socket50and past lock60A. During operation, the working loads and forces encountered by tooth assembly10are advantageously transferred from the digging tooth20to the adapter22through the lock60A extending into the recess39on the adapter nose portion22.

From an understanding of this disclosure, it will be appreciated that locks60and60A serve the same functional purpose and operate in the same way to secure the tooth20and adapter nose portion26in operable combination. As such, the description below will only reference lock60for operably and releasably securing the tooth20and adapter nose portion in operable combination but it should be appreciated lock60could have a design similar to lock60A without detracting or departing from the true spirit and scope of this invention disclosure.

In accordance with the present disclosure, each tooth assembly10is furthermore provided with a spacer or securement member70. Securement member70is insertable into the relief or space59defined between the confronting surfaces on the adapter nose portion26and tooth cavity50so as to at least partially fill the relief59and urge the tooth in a direction toward lock60thereby maintaining the lock60within the recess39in the adapter nose portion26so as to inhibit longitudinal translation of the tooth20relative to the adapter nose portion26. Preferably, securement member70extends in a direction relative to the longitudinal axis16of the tooth assembly10so as to advantageously avoid operating loads being applied directly thereto during operation of the digging tooth assembly10.

After the tooth20is arranged in operable combination with adapter22, a portion of securement member70fits between the exterior of adapter nose portion26and the interior of the tooth socket50opposite from lock60. By this design, member70advantageously avoids operating loads being applied directly thereto during operation of the digging tooth assembly10. As such, wear on securement member70is minimized thus allowing securement member70to be reused, if desired, when a replacement part20is again attached to adapter22.

In the form shown inFIGS. 6 through 9, the securement member or spacer70includes an enlarged head portion72and a shank portion74. Member70is preferably formed from metal, i.e. steel or other suitable material or non-compressible metal alloy, with the head portion72and shank portion74preferably being formed integral relative to each other. In the illustrated form shown inFIGS. 2 and 3, the exposed section of the head portion72of member70generally follows the fore-and-aft profile of tooth20to promote movement of material therepast.

Returning to the embodiment illustrated by way of example inFIGS. 6 through 9, shank portion74of member70preferably includes two laterally spaced and generally parallel sides76and78. Notably, the distance between the sides76and78of as well as the configuration of the shank portion74can change from one securement member to another depending upon the particular tooth socket and adapter nose portion combination or conjuncture into which the member70is to be inserted. The wear part or tooth20is secured to the adapter22by the lock60. In this embodiment, tolerances of the shank portion74of member70are generally controlled by the distance between the side surfaces56and58of the tooth socket50. Thus, the combination of lock60with the securement member70allows the system of this invention disclosure to be used on scores of other manufacturers' adapters, even though the tolerances of those other manufacturers' adapters are not ascertainable with exacting certainty.

To reduce an accumulation of dirt fines between the tooth20and securement member70during operation of the tooth assembly, and thereby facilitate removal of member70from between tooth20and adapter nose portion26, the shank portion74or member70preferably has an arcuate configuration between the free distal thereof and that end joined to the head portion72. Additionally, and after the adapter nose portion26is arranged in operable combination with tooth20, the shank portion74of member70preferably extends across substantially an entire side of the adapter nose portion26when member70is fully inserted into an operational position whereby furthermore reducing stress concentrations during operation of the digging tooth assembly10(FIG. 1).

In the form shown inFIGS. 6 and 9, the spacer or member70furthermore includes an elongated key79projecting from side76of the shank portion74. The other side78of the shank portion74, i.e. the side arranged in confronting relation with the side of the adapter nose portion26, preferably has a generally planar surface configuration. For reasons discussed in further detail below, the side78of member70preferably has a camming surface79ato effectively reduce the lateral width leading from the terminal end of the shank portion74of member70.

In one form, the key79on the shank portion74of member70has an arcuate configuration between opposed ends and extends at least the majority and preferably the entire length of the shank portion74of member70. The arcuate configuration of the key79preferably compliments the arcuate configuration of the shank portion74of member70and advantageously limits the direction which member70can be correctly inserted into operable combination with the tooth20and adapter nose portion26.

In the example shown inFIG. 10, the upper or top slanted wall44of the wear part or tooth20defines an opening80arranged adjacent to the side surface58of and extending through to the blind cavity or socket50of the tooth20. Notably, in the example illustrated inFIG. 10, the opening80defined by tooth20is arranged adjacent to that side surface58of the blind cavity50opposite from lock60(FIGS. 4 and 5). The opening80in the tooth20permits the shank portion74of member70(FIGS. 7 through 9) to pass endwise therethrough while limiting movement of the enlarged head portion72from passing therethrough. As such, the marginal edge of the opening80acts as a limit stop for member70.

In the embodiment illustrated inFIG. 10, an opening81in the lower or bottom wall46of wear part20proximate to the side surface58of cavity54permits passage of a suitably shaped tool T therethrough so as to engage and push upwardly against member70(FIGS. 6 through 9) whereby facilitating removal of member70, when required or desired, from the space or relief59between wear part20and the adapter nose portion26to effect repair/replacement of the wear part20. Passage of tool T through opening81on tooth20will cause vertical displacement of the member70through the tooth opening80. Only after member70is removed from between the tooth20and adapter nose portion26can the wear part20be shifted whereby releasing the adapter nose portion26from operable engagement with the lock60(FIG. 4) on the tooth20and thereafter permitting the longitudinal translation of the tooth20relative the adapter nose portion26to effect release of the tooth20from adapter22.

Returning toFIG. 3, when securement member70is fully inserted into operable combination with the tooth20and adapter22, a portion of the head portion72of member70overlies and is arranged in confronting relation relative to a portion of tooth20. As shown inFIGS. 3 and 10, a slot or other suitably shaped recess81aextends to the exterior of tooth20from a marginal edge of the opening80. Besides those steps mentioned above for effecting release of member70from engagement with the tooth20and adapter22, opening81afurthermore allows a suitably shaped tool (not shown) to be inserted between the head portion72of member70and that portion of the tooth20arranged in confronting relation relative thereto to effect separation between member70and tooth20whereby effecting release of the member70.

Turning toFIGS. 10 and 11, the side surface58of tooth cavity50opposite from the lock60(FIG. 4) preferably defines an arcuately shaped keyway82for slidably accommodating and guiding endwise passage of the key79therethrough when the shank portion74of member70is inserted into operable combination with the tooth20and adapter22. As shown inFIGS. 10 and 11, the keyway82defines longitudinally spaced shoulders94and96which cooperate with the longitudinally spaced sides75and77on key79to allow the securement member70to interact with the tooth20while maintaining and orienting the shank portion74of the member70relative to the tooth20. In a preferred form, member70has only one way of being inserted into operable combination with the adapter nose portion26and tooth20. It should be appreciated, however, the arrangement of key79and keyway82could readily be reversed. That is, key79can be provided on the side surface of the tooth cavity50while the keyway82can be provided on the side78of the shank portion74without detracting or departing from this invention disclosure.

Preferably, a secondary lock90is provided for releasably maintaining member70in position between tooth20and the adapter nose portion26during operation of the tooth assembly whereby inhibiting inadvertent longitudinal separation of the tooth20relative to the adapter22. More specifically, and in the example shown inFIG. 4, the secondary lock90is arranged in operable combination with the digging tooth20, the adapter nose portion26, and member70. It will be appreciated, however, and as discussed below, the secondary lock90can take varied configurations without detracting or departing from the spirit and scope of the present disclosure.

In the embodiment shown inFIG. 4, the secondary lock90is designed as a detent mechanism92for releasably maintaining member70between the tooth20and the adapter nose portion26during operation of the digging tooth assembly10. More specifically, and as shown inFIGS. 12,13and14, mechanism92includes a spring94preferably having a semi-spherical element95and96longitudinally projecting from each end thereof. Suffice it to say, the operative length OL of mechanism92(FIG. 12) is greater than the lateral distance between the distal end of tooth projection60and the planar side surface78of lock70(FIG. 4). As such, and when the securement member70is inserted between the tooth20and the adapter nose portion26, and the secondary lock90is arranged in the position shown inFIG. 4, spring94is longitudinally compressed such that the elements95and96are continually urged in opposed longitudinal directions relative to each other.

In the embodiment shown inFIG. 4, spring94is designed as a longitudinally compressible elastomeric member97. Alternatively, however, a conventional mechanical or coil spring can be used as part of mechanism92. In the illustrated embodiment, the elastomeric member97fits into the recess or bore39in the adapter nose portion26(FIGS. 4 and 15). Moreover, elements95and96are preferably designed as metal, i.e., steel, ball bearings which extend longitudinally from and are secured, as by vulcanization or other suitable process, to opposed ends of the elastomeric spring94, such that about half of each ball bearing95,96extends beyond the respective free end of the spring94. By this design, mechanism92can be inserted into the bore39in the adapter nose portion26with elements95,96longitudinally extending from either end thereof without detracting from the effective and efficient operation of lock90. Moreover, and with the secondary lock embodiment illustrated inFIGS. 4 and 12through15, the secondary lock90advantageously cannot be incorrectly installed into operable combination with the tooth20, adapter nose portion26and member70.

As shown by way of example inFIGS. 4 and 15, and when lock90is arranged in operable combination with the digging tooth20, the adapter nose portion26, and member70, element96is urged by spring94into a suitably configured recess98defined on the generally planar face of side surface78of member70. As will be understood, during insertion of member70into the space59between the wear part20and the adapter nose portion26, spring94initially and longitudinally compresses to permit the shank portion74of member70to pass element96. In this regard, and as member70is being inserted into the recess59between the wear part20and the adapter nose portion26, the ramp or camming surface79a(FIG. 9) on member70progressively compresses the spring94whereby easing installation of the secondary lock90and reducing the likelihood of damage to element96of the secondary lock90.

Continued insertion of the securement member70into the space or void59separating side38of the adapter nose portion26from the side surface58of tooth cavity50eventually causes the recess98on the face78of lock70to align with element96, acting under the compression of spring94, whereby causing element96to forcibly snap into and engage the recess98thereby inhibiting inadvertent removal of member70from between the tooth20and the adapter nose portion26. The resiliency of the secondary lock90, however, furthermore permits purposeful removal of the securement member70from between the tooth20and adapter nose portion26whereby permitting repair and/or removal of the wear part20when required or desired without the use of hammers or the like.

Furthermore, the design of mechanism92could readily be altered without detracting or seriously departing from the true spirit and scope of this disclosure. That is, and if so desired, mechanism92could be designed with but a single detent96at only one end of the spring94so as to coact with recess98on the side surface78of lock70. Alternatively, a spherical projection96can be provided on side surface78of member70, with the accommodating recess98for releasably holding that element96being provided at the end of the spring94.

As mentioned, the secondary lock for maintaining member70between tooth20and the adapter nose portion26can take varied configurations without detracting or departing from the spirit and scope of the present disclosure. In this regard, an alternative secondary lock arrangement is illustrated by way of example inFIGS. 16 and 17. This alternative form of secondary lock is designated generally by reference numeral190. The elements of wear part20, the adapter nose portion26, and securement member70which are similar to those mentioned above are identified by like reference numerals.

In that embodiment shown inFIG. 16, the secondary lock190includes an elongated member192having an enlarged head portion194and a shank portion196. At least a lengthwise section of the shank portion196, axially extending from the head portion194of member192, is provided with external threading thereon. Moreover, and as illustrated by way of example inFIGS. 16 and 17, the head portion194of member192is configured to accommodate a tool (not shown) suitable for imparting rotation to member192from outside the tooth or wear part20.

When wear part20and the adapter nose portion26are arranged in operable combination with each other, and in example shown inFIG. 16, the head portion194and shank portion196of member192extend endwise through a bore195(FIGS. 17 and 18) provided in the tooth side wall48′. As such, the head portion194of member192is preferably accommodated within the confines defined by the closed margin of the bore195on the side wall48′ of tooth20and protected against wear during operation of tooth assembly20.

In the example illustrated inFIG. 16, and when member192is inserted fully into operable combination with wear part20and adapter nose portion26, the free end of the shank portion196of member192axially extends into the recess39in the adapter nose portion26thereby furthermore inhibiting inadvertent longitudinal translation of the tooth20relative to the adapter nose portion26. In the example shown, and to inhibit inadvertent separation of member lock70from between tooth20and the adapter nose portion26, the threaded shank portion196of member192threadably engages with a threaded opening198(FIG. 19) extending through the shank portion74of securement member70. As such, the securement member70is maintained in position between the tooth20and adapter22by the secondary lock190thereby releasably maintaining the tooth20and adapter22in operable combination with each other until the secondary lock190is removed from operable association with securement member70.

To add strength and rigidity to that section of the adapter nose portion26defining the bore39, the secondary lock190can further include a metal, preferably steel, insert197between the free end of lock60and the distal end of the threaded shank portion196of member192. Preferably, insert197would have a cross-sectional configuration which is close to the cross-sectional configuration of bore39defined by the adapter nose portion26. Moreover, the insert197would have a length generally equal to the length separating the free end of lock60from the distal end of the threaded shank portion196of member192when member192is fully engaged with the securement member70so as to furthermore and advantageously limit displacement and movements of the wear part/tooth20on the adapter nose portion26during operation of the digging tooth assembly10.

Another alternative secondary lock arrangement is illustrated by way of example inFIG. 20. This alternative form of secondary lock is designated generally by reference numeral290. The elements of wear part20, the adapter nose portion26, and securement member70which are similar to those mentioned above are identified by like reference numerals.

In the embodiment shown inFIG. 20, the recess or bore39disposed toward the rear of the adapter nose portion26is defined by a pair of axially aligned blind bores39aand39b. Each void or opening39aand39bopens to a respective side36and38of the adapter nose portion26. Moreover, each void or opening39aand39bpreferably has a closed marginal edge; with the blind bore39abeing configured to endwise accommodate the lock60on tooth20.

In the embodiment illustrated inFIG. 20, the secondary lock290includes an elongated member292having an enlarged head portion294and a shank portion296. At least a lengthwise section of the shank portion296axially extending from the head portion294of member292is provided with external threading thereon. As with the secondary lock embodiment illustrated inFIGS. 16 and 17, the head portion294of member292is configured to accommodate a tool (not shown) suitable for imparting rotation to member292from outside the tooth or wear part20.

When wear part20and the adapter nose portion26are arranged in operable combination with each other, and in example shown inFIG. 20, the head portion294and shank portion296of member292extend endwise through a bore295(similar to bore195illustrated inFIGS. 17 and 18) provided in the tooth side wall48′. As such, the head portion294of member292is preferably accommodated within the confines defined by the closed margin of the bore295on the side wall48′ of tooth20and is protected against wear during operation of tooth assembly20.

When member292is inserted fully into operable combination with wear part20and adapter nose portion26, a lengthwise portion of shank portion296of member292axially extends through the securement member70and into the recess39bin the adapter nose portion26thereby furthermore inhibiting inadvertent longitudinal translation of the tooth20relative to the adapter nose portion26. In this embodiment, the shank portion296of member292is sized such that the free end thereof engages with and presses against the closed end of the blind cavity39bwhereby advantageously laterally moving the tooth20relative to the adapter nose portion26and in a direction whereby further securing lock60on tooth20within the blind cavity39aon the other side of the adapter nose portion26.

In the example shown inFIG. 20, and to inhibit inadvertent separation of member292from securement member70, the threaded shank portion296of member292engages with an opening298(similar to opening198illustrated inFIG. 19) extending through the shank portion74of member70. As such, securement member70is maintained in position between the tooth20and adapter22by the secondary lock290thereby releasably maintaining the tooth20and adapter22in operable combination with each other until the secondary lock290is removed from operable association with securement member70.

Yet another alternative secondary lock arrangement is illustrated by way of example inFIG. 21. Because of the similarity with lock290, this alternative form of secondary lock is designated generally by reference numeral290′. The elements of wear part20, the adapter nose portion26, and securement member70which are similar to those mentioned above are identified by like reference numerals.

Turning toFIG. 21, and as in the embodiment shown inFIG. 20, the recess or bore39disposed toward the rear of the adapter nose portion26is defined by a pair of axially aligned blind bores39aand39b. Each void or opening39aand39bopens to a respective side36and38of the adapter nose portion26. Moreover, each void or opening39aand39bpreferably has a closed marginal edge. In the example shown, the blind bore39ais configured to endwise accommodate the lock60on tooth20.

In the embodiment illustrated inFIG. 21, the secondary lock290′ includes an elongated member292′ preferably having an enlarged head portion294′ and a shank portion296′. In this embodiment, either the whole or part of member292is formed from a magnetic material. Although substantially any magnetic material would suffice, forming member292′ from a magnetic material including neodymium and of the type sold by K&J Magnetics, Inc. in Jamison, Pa. 18929 has been found to be particularly beneficial.

When wear part20and the adapter nose portion26are arranged in operable combination with each other, and in example shown inFIG. 21, the head portion294′ and shank portion296′ of member292′ extend endwise through a bore295′ (similar to bore195illustrated inFIGS. 17 and 18) provided in the tooth side wall48′. As such, the head portion294′ of member292′ is preferably accommodated within the confines defined by the closed margin of the bore295′ on the side wall48′ of tooth20and is protected against wear during operation of tooth assembly20.

When member292′ is inserted fully into operable combination with wear part20and adapter nose portion26, a lengthwise portion of shank portion296′ of member292′ axially extends through an opening298′ in the securement member70(similar to opening198illustrated inFIG. 19) and into the recess39bin the adapter nose portion26thereby furthermore inhibiting inadvertent longitudinal translation of the tooth20relative to the adapter nose portion26. The magnetic material from which member292′ is formed inhibits inadvertent separation of member292′ from securement member70and tooth20. As such, securement member70is maintained in position between the tooth20and adapter22by the secondary lock290′ thereby releasably maintaining the tooth20and adapter22in operable combination with each other until the secondary lock290is removed from operable association with securement member70.

To remove member292′, a portion of the head portion294of member292facing the side48′ of tooth20can be suitably configured so as to allow a tool (not shown) to engage therewith whereby effectively removing member292′ from the tooth20. Alternatively, another magnet can be used to effectively and magnetically withdraw member282′ axially from bore295′ so as to effectively release member292′ from securement member70whereby effecting the release of the tooth20from the adapter nose portion26.

Yet another alternative secondary lock arrangement for maintaining securement member70in operable association with and between tooth20and adapter nose portion26is illustrated by way of example inFIGS. 22,23and24. This alternative form of secondary lock is designated generally by reference numeral390. The elements of wear part20, the adapter nose portion26, and securement member or lock70which are similar to those mentioned above are identified by like reference numerals.

This form of secondary lock390is preferably carried by the securement member70having a design substantially similar to that discussed above. Accordingly, the same reference numerals will be used for securement member70as were used above. As shown inFIGS. 22 and 23, this alternative form of secondary lock390is designed as a detent mechanism and preferably includes a resiliently biased elongated detent391extending longitudinally across and laterally from side78of the shank portion74of member70adapted to be arranged in confronting relation relative to the adapter nose portion26when member70is inserted into operable combination with tooth20(FIG. 24). While the free end of detent391laterally extends from the shank portion74of member70, it is to be understood detent391is preferably captured and carried by the shank portion74of member70. Moreover, detent391is preferably configured with a chamfferred lower surface or edge393and an upper edge395. Edge395preferably extends generally normal to that side78of the shank portion74of the member70adapted to be arranged in confronting relation relative to the adapter nose portion26when member70is inserted into operable combination with the tooth20(FIG. 24).

Detent391of lock390is permitted to initially move inwardly toward that side78of the shank portion74of member70, adapted to be arranged in confronting relation relative to the adapter nose portion26, when member70is inserted between the tooth20and the adapter nose portion26(FIG. 24). When the securement member70is fully inserted unto operable combination with the tooth20and the adapter nose portion26, detent391springs back to the position shown inFIG. 24under the influence of a resilient member391′.

In the embodiment shown inFIG. 24, a marginal edge of the opening80in the upper slanted wall44of tooth20is provided with a longitudinally elongated and free ended lip81′. Notably, the free end of lip81′ is arranged in general vertical alignment with the side38of the adapter nose portion26when the tooth20and adapter22are arranged in operable combination relative to each other. In the illustrated embodiment, tooth20further defines a chamffered or angled surface83extending upwardly and laterally from the free end of the lip81′ toward an upper surface on the upper tooth wall44. In the illustrated embodiment, tooth20further defines an undercut or recess85extending laterally from the free end of the lip81′ and defining a shoulder87extending at an angle of about 90° relative to the free end of the lip81′.

Returning toFIGS. 22 and 23, this alternative form of secondary lock390can furthermore include a second resiliently biased detent397laterally extending from side78of the shank portion74of securement member70in vertically spaced relation from detent391. Detent397is adapted to be arranged in confronting relation relative to the adapter nose portion26when member70is inserted into the space59between the adapter nose portion26and tooth20(FIG. 24). Preferably, detent397has a button-like configuration with a chamffered outer edge398. Like detent391, detent397is captured and carried by the securement member70and operates under the influence of a resilient member397′. As shown, detent397preferably has an outer diameter399generally equal to the outer diameter of recess39opening to that side of the adapter nose portion26to be arranged in confronting relation relative to the member70when the adapter nose portion26and tooth20are arranged in longitudinally locked relation relative to each other. When member70is inserted into the relief or space59between the tooth20and adapter nose portion26, the resilient detent397first moves inward toward side76of member70. After the securement member70is fully inserted into the relief or space59between tooth20and adapter nose portion26(FIG. 24), the detent397snaps or returns to a position, as shown inFIG. 24, under the influence of the resilient member397′.

As shown inFIG. 24, when the securement member70is inserted through the opening80in the upper tooth wall44and into the space or relief59between tooth20and the adapter nose portion26, the chamffered outer edge398of detent397engages with the upper chamffered or slanted surface83extending from the tooth lip81′ whereby forcibly causing the detent397to retract toward member70and move past the free ended lip81′ on the tooth20. As member70is furthermore moved into the space59between tooth20and adapter22, the chamffered lower surface393on detent391engages with the upper chamffered or slanted surface83extending from the tooth lip81′ whereby forcibly causing detent391to retract toward member70and move past the free ended tooth lip81

As the securement member70is still furthermore inserted into the opening80in the upper wall44and into the space59between tooth20the adapter nose portion26and when the upper edge395of detent391moves past the free ended lip81′ on the tooth20, the resiliency of detent391causes the detent391to spring into the undercut or recess85under the lip81′ whereby inhibiting the securement member70from inadvertently being displaced from between tooth20the adapter nose portion26. Preferably, and substantially concurrently with the action of detent391, the other resilient detent397springs into the recess39on the adapter nose portion26whereby furthermore securing securement member70against inadvertent displacement from between the tooth20and the adapter nose portion26so as to inhibit longitudinal translation of the tooth20relative to the adapter nose portion26. The resiliency of the detents391and397furthermore permits removal of the securement member70, when required or desired, from between the tooth20and the adapter nose portion26so as to effect repair/replacement of the wear part when required or desired.

FIGS. 25 through 27illustrate another two-part tooth assembly including another form of tooth and adapter. The tooth or wear part illustrated inFIGS. 25 through 27is designated generally by reference numeral420. In the illustrated embodiment, the replaceable wear part420is designed as a digging tooth. As mentioned, however, the wear part can take any of a myriad of different designs other than a tooth, i.e., a ripper, lip shroud, wear cap, etc. without detracting or departing from the true spirit and scope of this invention disclosure. The adapter or support illustrated inFIGS. 25 through 27is designated generally by reference numeral422. The elements of this alternative digging tooth assembly which are functionally analogous to those components or elements discussed above regarding digging tooth20and adapter22are designated by reference numerals identical to those listed above with the exception this embodiment uses reference numerals in the 400 series.

Turning toFIG. 25, the adapter422has an elongated and preferably unitary construction and includes a base portion424and an elongated nose portion426projecting forward from the base portion424. The adapter base portion424is configured for suitable attachment to the edge or lip12of the bucket or implement14through any suitable and well known means including fasteners, welding, etc.

The configuration of the adapter nose portion426, illustrated by way of example inFIGS. 25 through 27, is such that a longitudinal cross-sectional configuration of the adapter nose portion426increases as measured rearwardly from a free end435of the adapter nose portion426. In the example selected for illustrative purposes inFIGS. 26 and 27, the adapter nose portion426has top and bottom angled surfaces432and434which converge relative to each other and toward the free end435of the adapter422. In the embodiment shown inFIG. 25, the adapter nose portion426furthermore includes a pair of laterally spaced sides436and438which, in the form used as an example, extend generally parallel to each other. Suffice it to say, the adapter nose portion426has a first predetermined configuration.

As shown inFIG. 27, the adapter or support422defines a recess or bore439disposed toward a rear of the nose portion426and extends generally normal to the tooth assembly axis416. In the form shown inFIG. 27, recess439is defined by a vertically disposed throughbore which opens to the top and bottom surfaces432and434of the adapter nose portion426. In the illustrated embodiment, recess439has a closed marginal edge.

In the example shown inFIG. 26, the wear part or tooth420has an longitudinally elongated wedge shape between a forward cutting edge or end440, operative to engage the material to be worked, and a rear end442thereof. Like adapter422, tooth420is preferably formed from a ferrous metal, i.e., steel or a steel alloy. Preferably, tooth420has a unitary design including an upper slanted wall444and a lower slanted wall446arranged in converging relation toward the end440of the tooth420. As shown inFIG. 25, tooth420further includes a pair of side walls448and448′ between walls444and446, respectively (FIG. 26). Of course, the exterior sides of tooth420can take a myriad of different shapes from that shown without detracting or departing from the true spirit and scope of this disclosure.

As shown inFIGS. 25 through 27, the wear part or tooth420defines an open-ended blind cavity or socket450for longitudinally receiving and accommodating at least a lengthwise section of the adapter nose portion426. Suffice it to say, socket450has a predetermined configuration which compliments or proximates the configuration of the adapter nose portion426. In the illustrated form, the socket450has a larger cross-sectional configuration toward an open end than toward a closed end thereof. In the illustrated embodiment, the tooth cavity or socket450has top and bottom angled surfaces452and454(FIGS. 26 and 27) which converge relative to each other. The tooth cavity or socket450furthermore includes a pair of laterally spaced side surfaces456and458which, in one form, extend generally parallel to each other and to the longitudinal axis416. Suffice it to say, the adapter nose portion426and tooth cavity or socket450have complimentary cross-sectional designs and/or configurations.

As shown inFIGS. 26 and 27, surfaces452and454of the tooth cavity450are spaced or otherwise separated by a vertical distance greater than the vertical distance separating confronting surfaces432and434on the adapter nose portion426. That is, the predetermined configuration of the tooth cavity450is larger in cross-section than the predetermined configuration defined by the adapter nose portion426. As such, and as shown inFIG. 27, when the adapter nose portion426is operably assembled within the tooth cavity450, a space or relief459is defined between surface434on the adapter nose portion426and the confronting surface454on tooth cavity450.

In the embodiment shown inFIG. 27, a free ended lock460extends into the socket450and toward the tooth assembly axis416. Lock460has a cross-sectional configuration which is equal to or smaller than the cross-section of the recess439defined by the adapter nose portion426. Notably, the lateral distance separating the free end of lock460from the opposed surface454of tooth cavity450is such as to permit longitudinal translation of the adapter nose portion426relative to the tooth socket450and longitudinally past lock460.

Lock460is preferably formed as a lug462formed integral with the tooth420. As discussed above, however, other lock designs (seeFIG. 4A) can be used and provided without detracting or departing from the true spirit and novel concept of this invention disclosure. As shown inFIG. 27, when the adapter nose portion426and tooth450are arranged in operable combination with each other, lock460is in registry with and extends into the recess439defined by the adapter nose portion426. As such, tooth420is locked to the adapter nose portion426and the working loads and forces encountered by the tooth assembly during operation are advantageously transferred from the digging tooth420to the adapter422through the lock460extending into the recess439on the adapter nose portion26.

In accordance with the present disclosure, and as illustrated by way of example inFIGS. 26 and 27, the tooth assembly is furthermore provided with a spacer or securement member470. As with securement member70discussed above, the securement member470is insertable into the relief or space459defined between the confronting surfaces on the adapter nose portion426and tooth cavity450so as to at least partially fill the relief459and urge the tooth in a direction toward lock460thereby maintaining the lock460within the recess439in the adapter nose portion426so as to inhibit longitudinal translation of the tooth420relative to the adapter nose portion426. Preferably, securement member470extends in a direction relative to the longitudinal axis416of the tooth assembly so as to advantageously avoid operating loads being applied directly thereto during operation of the digging tooth assembly.

As shown inFIG. 27, and after the tooth420is arranged in operable combination with adapter422, a portion474of securement member470fits between the exterior of adapter nose portion426and the interior of the tooth socket450opposite from lock460. By this design, member470advantageously avoids operating loads being applied directly thereto during operation of the digging tooth assembly. As such, wear on securement member470is minimized thus allowing securement member470to be reused, if desired, when a replacement part420is again attached to adapter422.

The securement member or spacer470preferably has a design similar to lock70discussed in detail above and includes an enlarged head portion472(FIG. 26) and shank portion474(FIG. 27). The exposed section of the head portion472of member470generally follows the profile of tooth420to promote movement of material therepast.

The interior surface of tooth cavity450along with the securement member470preferably have a key and keyway design, generally identified inFIG. 27by reference numeral479. The key and keyway design479is similar to the key and keyway design discussed in detail above. Such design advantageously allows securement member470to interact with tooth420so as to guide insertion of the member470into operable combination with the tooth420while preferably limiting the direction securement member470can be correctly inserted into operable combination with the tooth420and adapter nose portion426.

In the example shown inFIG. 26, side wall448′ of the wear part or tooth420defines an opening480arranged adjacent to surface454of and extending through to the blind cavity or socket450of the tooth420. Notably, in the example illustrated inFIG. 26, the opening480defined by tooth420is arranged adjacent to that surface454of the blind cavity450opposite from lock460. The opening480in the tooth420permits the shank portion474of member470(FIG. 27) to pass endwise therethrough while limiting movement of the enlarged head portion472from passing therethrough. As such, the marginal edge of the opening480acts as a limit stop for member470.

An opening481(FIG. 25) in the side wall448of wear part420proximate to surface454of cavity450permits endwise passage of a suitably shaped tool (not shown) therethrough so as to engage and push against member470whereby facilitating removal of member470, when required or desired, from the space or gap459between wear part420and the adapter nose portion426to effect repair/replacement of the wear part420. Passage of the tool through opening481on tooth420will cause displacement of the member470through the tooth opening480. Only after member470is removed from between the tooth420and adapter nose portion426can the wear part420be shifted whereby releasing the adapter nose portion46from operable engagement with the lock60(FIG. 27) on the tooth420and thereafter permitting the longitudinal translation of the tooth420relative the adapter nose portion426to effect release of the tooth420from adapter422.

When securement member470is fully inserted into operable combination with the tooth420and adapter422, a portion of the head portion472of member470overlies and is arranged in confronting relation relative to a portion of tooth420. As shown inFIG. 26, a slot or other suitably shaped recess481aextends to the exterior of tooth420from a marginal edge of the opening480. Besides those steps mentioned above for effecting release of member470from engagement with the tooth420and adapter422, opening481afurthermore allows a suitably shaped tool (not shown) to be inserted between the head portion472of member470and that portion of the tooth420arranged in confronting relation relative thereto to effect separation between member470and tooth420whereby effecting release of the member470.

As shown inFIG. 27, a secondary lock490is preferably provided for releasably maintaining member470in position between tooth420and the adapter nose portion426during operation of the tooth assembly whereby inhibiting inadvertent longitudinal separation of the tooth420relative to the adapter422. More specifically, and in the example shown inFIG. 27, the secondary lock490is arranged in operable combination with the digging tooth420, the adapter nose portion426, and member470.

In the embodiment shown inFIG. 27, the secondary lock490is designed as a detent mechanism492arranged within the recess439defined by the adapter nose portion426for releasably maintaining member470between the tooth420and the adapter nose portion426during operation of the digging tooth assembly410. In the embodiment illustrated inFIG. 27, mechanism492is substantially similar to and functions in the substantially the same manner as mechanism92discussed in detail above. It will be appreciated, however, and as discussed above, the secondary lock490can take varied configurations without detracting or departing from the spirit and scope of the present disclosure.

FIGS. 28 through 30illustrate yet another two-part tooth assembly including another form of tooth and adapter. The tooth or wear part illustrated inFIGS. 28 through 30is designated generally by reference numeral520. In the illustrated embodiment, the replaceable wear part520is designed as a digging tooth. As mentioned, however, the wear part can take any of a myriad of different designs other than a tooth, i.e., a ripper, lip shroud, wear cap, etc. without detracting or departing from the true spirit and scope of this invention disclosure. The adapter or support illustrated inFIGS. 28 through 30is designated generally by reference numeral522. The elements of this alternative digging tooth assembly which are functionally analogous to those components or elements discussed above regarding digging tooth20and adapter22are designated by reference numerals identical to those listed above with the exception this embodiment uses reference numerals in the 500 series.

Turning toFIG. 28, the adapter522has an elongated and preferably unitary construction and includes a base portion524and an elongated nose portion526projecting forward from the base portion524. The adapter base portion524is configured for suitable attachment to the edge or lip12of the bucket or implement14through any suitable and well known means including fasteners, welding, etc.

The configuration of the adapter nose portion526, illustrated by way of example inFIGS. 28 through 30, is such that a longitudinal cross-sectional configuration of the adapter nose portion526increases as measured rearwardly from a free end of the adapter nose portion526. In the example selected for illustrative purposes inFIGS. 28 through 30, the adapter nose portion526is configured in accordance with the teachings and principals set forth in U.S. Pat. Nos. 6,047,487 and 6,247,255 assigned to H&L Tooth Company; the applicable portions of which are incorporated herein by reference.

As shown inFIG. 29, the adapter nose portion has top and bottom angled surfaces532and534which converge relative to each other and toward the free end535(FIG. 30) of the adapter522. In the embodiment shown inFIG. 29, the top surface532of adapter nose portion526has two downwardly angled sides536and538disposed to opposed lateral sides of the longitudinal axis516of the tooth assembly510. Similarly, the bottom surface534of adapter nose portion526has two upwardly angled sides535and537disposed to opposed lateral sides of the longitudinal axis516of the tooth assembly510. In the embodiment illustrated inFIG. 29, the angled sides535and536are joined to each other along an edge535′. Similarly, in the embodiment illustrated inFIG. 29, the angled sides537and538are joined to each other along an edge538′. Suffice it to say, the adapter nose portion526has a first predetermined configuration.

As shown inFIGS. 29 and 30, the adapter or support522defines a recess or bore539disposed toward a rear of the nose portion526and extends generally normal to the tooth assembly axis516. In the form shown inFIG. 29, recess539is defined by an angled throughbore which opens to the angled side538of the top surface532of the adapter nose portion526to one side of the longitudinal axis516of tooth assembly510and to the angled side535of the bottom surface534of the adapter nose portion526on an opposed side of the longitudinal axis516of tooth assembly510while passing generally through the longitudinal axis516of the tooth assembly510. Of course, recess539can alternatively be defined by an angled throughbore which opens to the angled side536of the top surface532of the adapter nose portion526to one side of the longitudinal axis516of tooth assembly510and to the angled side537of the bottom surface534of the adapter nose portion526on an opposed side of the longitudinal axis516of tooth assembly510while passing generally through the longitudinal axis516without detracting or departing from the true spirit and scope of this invention disclosure. In the illustrated embodiment, recess539has a closed marginal edge.

In the example shown inFIG. 26, the wear part or tooth520has an longitudinally elongated wedge shape between a forward cutting edge or end540, operative to engage the material to be worked, and a rear end542thereof. Like adapter522, tooth520is preferably formed from a ferrous metal, i.e., steel or a steel alloy. Preferably, tooth520has a unitary design including an upper slanted surface544and a lower slanted surface546arranged in converging relation toward the end540of the tooth520. In the embodiment illustrated inFIG. 29, the upper or top surface544of tooth520includes two downwardly angled sides545and547disposed to opposed lateral sides of the longitudinal axis516of the tooth assembly510. Similarly, the bottom surface546of tooth520has two upwardly angled sides545′ and547′ disposed to opposed lateral sides of the longitudinal axis516of the tooth assembly510. Of course, the exterior surfaces of tooth520can take a myriad of different shapes from that shown without detracting or departing from the true spirit and scope of this disclosure.

As shown inFIGS. 29 and 30, the wear part or tooth520defines an open-ended blind cavity or socket550for longitudinally receiving and accommodating at least a lengthwise section of the adapter nose portion526. Suffice it to say, socket550has a predetermined configuration which compliments or proximates the configuration of the adapter nose portion526. In the illustrated form, the socket550has a larger cross-sectional configuration toward an open end than toward a closed end thereof. In the illustrated embodiment, the tooth cavity or socket450has top and bottom angled surfaces552and554(FIG. 29), respectively, which converge relative to each other and toward a forward end of the tooth cavity450.

In the illustrated embodiment, and as described in further detail in the afore-mentioned U.S. patents to H&L Tooth Company, the top surface552of the tooth cavity550is defined, at least in part, by two angled sides553and555disposed to opposed sides of the longitudinal axis516. Similarly, and in the illustrated embodiment, the bottom surface554of the tooth cavity550is defined, at least in part, by two angled sides553′ and555′ disposed to opposed sides of the longitudinal axis516. Suffice it to say, the tooth cavity550has a second predetermined configuration which is proximate to but different from the first cross-sectional configuration defined by the adapter nose portion526.

As shown inFIGS. 29 and 30, the angled side538of the adapter nose portion top surface532and the angled side555of the top surface552of tooth cavity550are spaced or otherwise separated by a distance greater than the distance than the angled side536of the adapter nose portion top surface532and the angled side555′ of the bottom surface554of tooth cavity550. Because the predetermined configuration of the tooth cavity550is larger in cross-section than the predetermined configuration defined by the adapter nose portion526, and as shown inFIGS. 29 and 30, when the adapter nose portion526is operably assembled within the tooth cavity550, a space or relief559is defined between the angled side538on the adapter nose portion526and the confronting surface555on tooth cavity550.

In the embodiment shown inFIGS. 29 and 30, a free ended lock560extends into the socket550and toward the tooth assembly axis516. Lock560has a cross-sectional configuration which is equal to or smaller than the cross-section of the recess539defined by the adapter nose portion526. Notably, the distance separating the free end of lock560from the opposed surface555of tooth cavity550is such as to permit longitudinal translation of the adapter nose portion526relative to the tooth socket550and longitudinally past lock560.

Lock560is preferably formed as a lug562formed integral with tooth520. As discussed above, however, other lock designs (seeFIG. 4A) can be used and provided without detracting or departing from the true spirit and novel concept of this invention disclosure. As shown inFIGS. 29 and 30, when the adapter nose portion526and tooth550are arranged in operable combination with each other, lock560is in registry with and extends into the recess539defined by the adapter nose portion526. As such, the working loads and forces encountered by the tooth assembly during operation are advantageously transferred from the digging tooth520to the adapter522through the lock560extending into the recess539on the adapter nose portion526.

As illustrated by way of example inFIGS. 29 and 30, the tooth assembly is furthermore provided with a spacer or securement member570. As with securement member70discussed above, and as shown inFIG. 30, the securement member570is insertable into the relief or space559defined between the confronting surfaces on the adapter nose portion526and tooth cavity550so as to at least partially fill the relief559and urge the tooth in a direction toward lock560thereby maintaining the lock560within the recess539in the adapter nose portion526so as to inhibit longitudinal translation of the tooth520relative to the adapter nose portion526. Preferably, securement member570extends in a direction relative to the longitudinal axis516of the tooth assembly so as to advantageously avoid operating loads being applied directly thereto during operation of the digging tooth assembly.

As shown inFIG. 29, and after the tooth520is arranged in operable combination with adapter522, a portion574of securement member570fits between the exterior of adapter nose portion526and the interior of the tooth socket550opposite from lock560. By this design, member570advantageously avoids operating loads being applied directly thereto during operation of the digging tooth assembly. As such, wear on securement member570is minimized thus allowing securement member570to be reused, if desired, when a replacement part520is again attached to adapter522.

The securement member or spacer570preferably has a design similar to lock70discussed in detail above and includes an enlarged head portion572(FIGS. 28 and 29) and shank portion574(FIGS. 29 and 30). Preferably, the exposed section of the member head portion572generally follows the profile of tooth520to promote movement of material therepast.

The interior surface of tooth cavity550along with the securement member570preferably have a key and keyway design, generally identified inFIGS. 28 and 30by reference numeral579. The key and keyway design579is similar to the key and keyway design discussed in detail above except in this embodiment the key and keyway design preferably has a generally linear design as compared to the curved or arcuate key and keyway design discussed above. This design change notwithstanding, the key and keyway579preferably provided in combination with the securement member570and the tooth cavity550advantageously allows securement member570to interact with tooth520so as to guide insertion of the member570into operable combination with the tooth520while preferably limiting the direction securement member570is inserted into operable combination with the tooth520and adapter nose portion526.

In the example shown inFIG. 29, the top surface544of the wear part or tooth520defines an opening580arranged adjacent to the angled side555of and extending through to the blind cavity or socket550of the tooth520. Notably, in the example illustrated inFIG. 29, the opening580defined by tooth520is arranged adjacent to that angled side555of the blind cavity550opposite from lock560. The opening580in the tooth520permits the shank portion574of member570(FIG. 29) to pass endwise therethrough while limiting movement of the enlarged head portion572if member570from passing completely into the recess539.

In the embodiment of the securement member illustrated inFIGS. 29 and 31, a lower section of the securement member570is configured to engage with the adapter nose portion526. That is, in the embodiment illustrated by way fo example inFIG. 29, the angled sides536and538on the upper surface532of the adapter nose portion are joined to each other along a longitudinally extending edge538a. In the embodiment illustrated by way of example inFIG. 29, the longitudinally extending edge538ahas a curved or arcuate configuration in cross-section. Moreover, the lower section of the securement member570is configured to engage with the longitudinally extending edge538aon the adapter nose portion whereby adding stability and strength to the releasable conjunction between the tooth520and adapter nose portion526.

As shown inFIG. 29, an opening581in the bottom surface546of wear part520proximate to the angled side555of cavity550permits endwise passage of a suitably shaped tool (not shown) therethrough so as to engage and push against member570whereby facilitating removal of member570, when required or desired, from the space or gap559between wear part520and the adapter nose portion526to effect repair/replacement of the wear part520. Passage of the tool through opening581on tooth520will cause displacement of the member570through the tooth opening580. Only after member570is removed from between the tooth520and adapter nose portion526can the wear part520be shifted to release the adapter nose portion526from operable engagement with the lock560(FIGS. 29 and 30) on the tooth520and thereafter permit the longitudinal translation of the tooth520relative the adapter nose portion526to effect release of the tooth520from adapter522.

When securement member570is fully inserted into operable combination with the tooth520and adapter522, a portion of the head portion572of member570overlies and is arranged in confronting relation relative to a portion of tooth520. As shown inFIG. 29, a slot or other suitably shaped recess581aextends to the exterior of tooth520from a marginal edge of the opening580. Besides those steps mentioned above for effecting release of member570from engagement with the tooth520and adapter522, opening581afurthermore allows a suitably shaped tool (not shown) to be inserted between the head portion572of member570and that portion of the tooth520arranged in confronting relation relative thereto to effect separation between member570and tooth520whereby effecting release of the member570.

As shown inFIGS. 29 and 30, a secondary lock590is preferably provided for releasably maintaining member570in position between tooth520and the adapter nose portion526during operation of the tooth assembly whereby inhibiting inadvertent longitudinal separation of the tooth520relative to the adapter522. More specifically, and in the example shown inFIGS. 29 and 30, the secondary lock590is arranged in operable combination with the digging tooth520, the adapter nose portion526, and member570.

In the embodiment shown inFIGS. 29 and 30, the secondary lock590is designed as a detent mechanism592arranged within the recess539defined by the adapter nose portion526for releasably maintaining member570between the tooth520and the adapter nose portion526during operation of the digging tooth assembly510. In the embodiment illustrated inFIGS. 29 and 30, mechanism592is substantially similar to and functions in the substantially the same manner as mechanism92discussed in detail above.

It will be appreciated, however, and as discussed above, the secondary lock590can take varied configurations without detracting or departing from the spirit and scope of the present disclosure. For example, the secondary lock for releasably maintaining the locking member590operably between the tooth520and adapter nose portion526can involve forming the locking member570from a magnetic material. Alternatively, and as shown inFIGS. 29 and 30, a magnetic insert595can be carried by and formed as part of the securement member570. Although substantially any magnetic material would suffice, such magnetic insert595is preferably formed from a magnetic material including neodymium and of the type sold by K&J Magnetics, Inc. in Jamison, Pa. 18929.

As shown inFIG. 29, when securement member570is fully inserted between the tooth520and adapter nose portion526, the magnetic insert595is arranged in confronting and attractive relation with a portion of either the digging tooth520and/or adapter nose portion526. As such, the magnetic attraction between the insert595in securement member570and the tooth520and/or adapter nose portion526inhibits inadvertent displacement of the securement member570from operably between the tooth520and adapter nose portion560whereby maintaining the digging tooth520locked to the adapter nose portion through lock560.

Still another alternative tooth assembly design is illustrated by way of example inFIGS. 32 through 34. This alternative tooth assembly design is designated generally by reference numeral610. The elements of this alternative tooth assembly design that are functionally analogous to those components discussed above regarding the tooth assembly10are designated by reference numerals identical to those listed above with the exception this embodiment uses reference numerals in the 600 series.

Tooth assembly610has a longitudinal axis616and includes a replaceable wear part620and an adapter or support622. In the illustrated embodiment, the replaceable wear part620is designed as a tooth. As mentioned, however, the wear part of assembly610can take a myriad of different designs other than a tooth, i.e., a ripper, lip shroud, wear cap, etc. without detracting or departing from the spirit and scope of this invention disclosure.

In the exemplary embodiment illustrated inFIG. 32, the adapter622has an elongated and preferably unitary construction and includes a conventional base portion624and a longitudinally elongated nose portion626projecting forward from the base portion624. The adapter base portion624is configured for suitable attachment to the edge or lip a bucket or implement (not shown) through any suitable and well known means including fasteners, welding, etc. The adapter nose portion626has a predetermined configuration. In the embodiment shown for exemplary purposes, the adapter nose portion626has top and bottom angled surfaces632and634, respectively, which converge relative to each other toward a free end635of the adapter622.

In the form shown inFIG. 33, the adapter nose portion626furthermore includes a pair of laterally spaced sides636and638. In the embodiment illustrated inFIGS. 33 and 34, the sides636and638are angled opposite relative to each other and are angled relative to the longitudinal tooth assembly axis616such that they converge toward a rear end of the adapter nose portion626. As such, the free or forward end635of the adapter nose portion626has a lateral width greater than the lateral width across the rear end of the adapter nose portion626.

The free forward end635of the adapter nose portion626preferably has a generally constant circular shape in plan so as to distribute the working loads applied thereto across a wider horizontal bearing surface. This design also increases stabilization of the tooth-to-adapter connection by reducing horizontal movements in digging applications.

In the illustrated embodiment, each side636,638of the adapter nose portion626has a back draft angle of no less than about 7° and no greater than about 22° relative to the longitudinal axis616of the tooth assembly610. A back draft angle of less than 7° creates a possible locking angle between the tooth620and adapter nose portion626which could cause tooth removal problems after the tooth assembly610has been used for long periods of field work and applied operating loads. A back draft angle in excess of 22° would yield greater interference, or holding power between the tooth620and the adapter nose portion626but is likely to cause nose pinching or reduced cross section toward the rear of the adapter nose portion626generating an overall weaker adapter622.

As shown by way of example inFIG. 32, the replaceable wear part or tooth620of assembly610has an longitudinally elongated wedge shape between a forward end and a rear end thereof. Preferably, the digging tooth620has a unitary design including an upper slanted wall644and a lower slanted wall646arranged in converging relation toward the forward end of the tooth620. As mentioned above, the outer configuration of the tooth620can take a myriad of designs without detracting or departing from the spirit and scope of this disclosure.

As shown inFIG. 33, tooth620defines an open ended blind cavity or socket650for longitudinally receiving and accommodating at least a lengthwise section of the adapter nose portion626by relative longitudinal movement or translation. The blind cavity650defined by tooth620has a predetermined configuration which is larger than the adapter nose portion predetermined configuration. In the embodiment illustrated inFIG. 32, the tooth cavity650has top and bottom angled surfaces652and654, respectively, which compliment the top and bottom angled surfaces632and634, respectively, on the adapter nose portion626and which converge relative to each other. As shown inFIG. 33, the blind cavity or socket650defined by tooth620furthermore includes a pair of laterally spaced side surfaces656and658.

In the embodiment illustrated inFIG. 34, side surface658of the blind cavity650extends generally parallel to the longitudinal axis616of the tooth assembly610when tooth620is operably connected to the adapter nose portion626. When tooth620is operably connected to the adapter nose portion626, the other side surface656of the tooth cavity650is angled relative to the tooth assembly axis616such that surface656converges toward a rear end of the cavity650and toward the longitudinal tooth assembly axis616. As such, the closed end of the tooth cavity650has a lateral width greater than the lateral width across the open end of the cavity650. Preferably, the back draft angle of the side surface656of cavity650is complimentary to the back draft angle associated with the side636of the adapter nose portion626.

As shown inFIG. 33, the adapter nose portion626and the blind tooth cavity650are configured relative to each other such that a rear of the tooth620must be laterally shifted sideways relative to the longitudinal tooth assembly axis616to allow the adapter nose portion626to be longitudinally inserted into the blind tooth cavity650. After the adapter nose portion626has been longitudinally fitted within the tooth cavity650, the rear end of the tooth620is angled again laterally toward the longitudinal tooth assembly axis616to arrange tooth610and adapter622in axially aligned working relation relative to each other. Because of this tooth angling installation requirement, the reverse becomes necessary to remove the tooth620from operable combination with the adapter nose portion626.

As is evident fromFIG. 34, the adapter nose portion626and the blind tooth cavity650are configured and sized relative to each other such that an opening or space659exists between side638of the adapter nose portion626and the confronting surface658of the blind tooth cavity650when the side636of the adapter nose portion626and the confronting surface656of the blind tooth cavity650are arranged in contacting and working relation relative to each other.

At least partially filling the space659while shifting the tooth620relative to the adapter nose portion626, tooth assembly610is provided with a securement member670for maintaining the tooth620and adapter622in operable combination relative to each other. In one form, th4securement member670extends generally vertical to the longitudinal axis616of the tooth assembly610. To effect such ends, and in a manner similar to that discussed above regarding tooth assembly10, member670is insertable into the space659between the wear part620and the adapter nose portion626through an opening680in the slanted top wall644(FIG. 32) of the tooth620and, thus, avoids operating loads being applied directly thereto. During operation of the tooth assembly610, member670prevents the tooth620from angling and dislodging from the adapter nose portion626thereby inhibiting the tooth620from longitudinal translation or movement relative to the adapter nose portion626required in removing the tooth620from the adapter nose portion626.

With the exceptions noted below, securement member670is configured substantially similar to that discussed above regarding securement member70. In the form shown inFIG. 34, member670includes a shank portion674having two laterally spaced sides676and678with an arcuate configuration between the free end thereof and that end joined to a head portion of member670similar to head portion72of member70. In the embodiment shown by way of example inFIG. 34, and after the adapter nose portion626is longitudinally arranged in combination with the tooth620, the shank portion674of member670extends across substantially an entire side of the adapter nose portion626when member670is fully inserted into an operational position.

In the embodiment shown inFIG. 34, the sides676and678of the shank portion674of securement member670angularly diverge relative to each other in a manner complimentary to the angled side638on the adapter nose portion626and side surface658of the tooth cavity650. As such, and when the shank portion674of member670is inserted into the space659between the adapter nose portion626and the tooth620, a wedging force is applied to the tooth620and adapter nose portion626during longitudinal translation of the tooth620relative to the adapter622. The wedging action exerted by the securement member670will advantageously and longitudinally urge the tooth620onto the adapter622.

Suffice it to say, a secondary lock similar to any of those described in detail above can be arranged in operable combination with lock670. As above, the purpose of such a secondary lock is to inhibit inadvertent displacement of the securement member670from the space relief659separating the wear part from the adapter nose portion.

There is also provided a method for releasably coupling a wear part or tooth to an adapter, wherein the tooth has an upper wall and a lower wall converging toward a free end of the tooth and a rearwardly opening socket formed therein. The tooth socket has a first predetermined configuration. In one form, the tooth socket is defined by an upper surface, a lower surface, and a pair of laterally spaced side surfaces extending between the upper and lower surfaces. The upper wall of the tooth defines an opening arranged adjacent to one of the side surfaces of and extending through to the socket. The adapter has a nose portion adapted to be longitudinally received and accommodated within the socket defined by the tooth. The adapter nose portion has a second predetermined configuration which is smaller than the first predetermined configuration of the tooth socket. In one form, the adapter nose portion has a pair of laterally spaced sides along with top and bottom surfaces. The predetermined configurations defined by the adapter nose portion and the tooth socket are such that a space is provided between the adapter nose portion and the tooth socket after the tooth and adapter are arranged in operable combination relative to each other. The method comprises the step of: inserting a securement member or lock for coupling the tooth and adapter in operable combination relative to each other through an opening in the tooth such that a portion of the securement member or lock bears against one side surface of the socket and a confronting side of the nose portion of the adapter whereby shifting the tooth to thereby inhibit longitudinal translation of the tooth relative to the adapter as long as the securement member or lock is retained between the tooth and the nose portion of the adapter.

The method for releasably coupling the tooth and adapter in operable combination relative to each other can further include the further step of: angling the tooth in a first sideways direction sufficiently to permit longitudinal translation of a free end of the adapter into the socket defined by the tooth. The method for releasably coupling the tooth and adapter in operable combination relative to each other can further include the further step of: angling the tooth in a second sideways direction sufficiently to align said tooth and adapter along a longitudinal axis defined by the tooth assembly. Also, the method for releasably coupling the tooth and adapter in operable combination relative to each other can include the further step of: using a secondary lock for releasably securing the tooth and adapter in operable combination relative to each other.

With the present invention disclosure, variances between the size and configuration of the tooth socket and the adapter nose portion are readily tolerated and accepted. The simple design proposed by the present disclosure advantageously yields possibilities which have heretofore been unknown by those skilled in the art. That is, by inserting a securement member or lock having different shank portion designs between the tooth and adapter nose portion in a direction extending generally perpendicular to the longitudinal axis of the tooth assembly, teeth manufactured, sold and distributed by different manufacturers can be used in combination with either new adapters manufactured, sold and distributed by other manufacturers or that existing population of adapters already existing in the field. Accordingly, an operator is not necessarily required to always return to the original equipment manufacturer for replacement parts only because no one else can provide parts for the particular model tooth/adapter combination being used by that operator. Instead, and with the present invention disclosure, the operator merely selects a securement member or lock which will accommodate the size variances between the tooth socket and adapter nose portion of the particular parts whereby opening a realm of possibilities which have been heretofore unknown.

From the foregoing, it will be observed that numerous modifications and variations can be made and effected without departing or detracting from the true spirit and novel concept of this invention disclosure. Moreover, it will be appreciated, the present disclosure is intended to set forth exemplifications which are not intended to limit the disclosure to the specific embodiments illustrated. Rather, this disclosure is intended to cover by the appended claims all such modifications and variations as fall within the spirit and scope of the claims.