Excavating tooth

A point for an excavating tooth comprising a top wall, a bottom wall, a pair of side walls and a rear wall, said top and bottom walls being generally inclined towards one another to define a front digging edge, said point further including a socket opening in said rear wall to matingly receive a nose of an adapter, said point further including at least two spaced apart sets of opposed faces, each set of opposed faces defining a first opening in said point, said first openings being aligned with one another to receive a lock pin therein, each said set of opposed faces including a front face facing away from said digging edge and a rear face facing toward said digging edge and in opposed relation to said front face, at least one of said front and rear faces of at least one of said sets of opposed faces further including a recess for receiving a detent from the lock pin received therein.

A lock pin for coupling a point to an adapter to form an excavating tooth, said lock pin comprising an elongate rigid casing having a one piece construction which rigidly resists external forces applied during use and a plurality of independently depressible protrusions, each said protrusion including a working member attached to elastomeric material, said casing including at least one pocket for receiving and mounting said elastomeric material therein, said casing having a first gap therein through which one of said protrusions extends to engage a face of an adapter in order to tighten the connection of a point on an adapter, said casing having a second gap therein through which another of said protrusions extends to engage an opening in the point to lock said lock pin to the point, each of said working members being movable between a point of maximum expansion and a point of maximum compression for said respective elastomeric material, outer walls of said casing which are fixed relative to one another being located between said points of maximum expansion and maximum compression for said one protrusion and between said points of maximum expansion and maximum compression of said another protrusion whereby said casing protects said elastomeric material against undue compression.

A lock pin for coupling a point to an adapter to form an excavating tooth, said lock pin comprising an elongate rigid casing having a unitary construction and at least two independently depressible protrusions, each of said protrusions including a working member and an elastomeric member, said elastomeric members of said two protrusions being independent and discrete with respect to one another, said casing defining a plurality of pockets for receiving and mounting said elastomeric members therein, one of said protrusions extending through a first gap in a front portion of said casing to engage a face of an adapter in order to tighten the connection of a point on an adapter, the other of said protrusions extending through a second gap in said casing to engage a recess to lock said lock pin to a point, said casing substantially encapsulating said elastomeric member of said other protrusion to shield it from external forces applied to the point during use.

A lock pin for coupling a point to an adapter to form an excavating tooth, said lock pin comprising an elongate rigid casing having a unitary construction which rigidly resists external forces applied during use and a plurality of independently depressible protrusions, each said protrusion including a working member attached to elastomeric material, said casing including at least one recess for receiving and mounting said elastomeric material therein, said casing including a partition extending transversely in said recess, said casing having a first gap therein through which one of said protrusions extends to engage a face of an adapter in order to tighten the connection of a point on an adapter, and said casing having a second gap therein through which another of said protrusions extends to engage an opening in the point to lock said lock pin to the point.