Abstract: A mounting system for a digging tooth of an excavator bucket has an adaptor nose with upper and lower bearing surfaces tapering convergently towards a free end thereof. A digging tooth having a convergently tapering socket locates on said adaptor nose with a screw-threaded connector extending, in a direction parallel to a longitudinal axis of said tooth, between a connector abutment on the adaptor nose and a tooth coupling on the tooth.

Abstract: A dragline bucket comprises a floor, opposed side walls and a rear wall; a front lip on the floor having adaptors to releasably secure cutting teeth thereto; opposed cheek plates adjacent respective front portions of the side walls; and, hoist rope attachment members located intermediate front and rear portions of the bucket. The bucket has a wide, relatively shallow configuration wherein the rear wall has a height greater than the adjacent side wall portions and respective junctions between the floor and side walls are formed with an arcuate inner surface and there is an arcuate taper between the floor and the top of the rear wall.

Abstract: An excavator tooth system comprises a mounting nose having a projecting spigot and a wear member (12) having at one end a socket (18), the socket (18) being defined by spaced side walls and upper and lower walls converging from a rearwardly facing socket opening to a forward end of the socket. Each of the upper and lower walls comprises a forward bearing face (8a) and a rear bearing face (7a) separated by a forwardly convergent intermediate face. The front and rear bearing faces (8a,7a) are substantially parallel to a longitudinal axis (50) of the wear member and engage corresponding bearing faces (8,7) in said spigot.

Abstract: A dragline bucket comprises a floor, opposed side walls and a rear wall; a front lip on the floor having adaptors to releasably secure cutting teeth thereto; opposed cheek plates adjacent respective front portions of said side walls; and, hoist rope attachment members located intermediate front and rear portions of the bucket. The bucket has a wide, relatively shallow configuration wherein the rear wall has a height greater than the adjacent side wall portions and respective junctions between said floor and side walls are formed with an arcuate inner surface and there is an arcuate taper between the floor and the top of the rear wall.

Abstract: A mounting system for a digging tooth of an excavator bucket has an adaptor nose with upper and lower bearing surfaces tapering convergently towards a free end thereof. A digging tooth having a convergently tapering socket locates on said adaptor nose with a screw-threaded connector extending, in a direction parallel to a longitudinal axis of said tooth, between a connector abutment on the adaptor nose and a tooth coupling on the tooth.

Abstract: A rigging system for dragline buckets includes a unitary adaptor having a hoist equalizer aperture at an upper end thereof and bucket hoist chain connectors extending from opposite sides adjacent a lower end of the adaptor. A connector for a dump block extends forwardly of the adaptor. The hoist equalizer aperture is circular and has transversely rounded bearing surfaces which engage with a cross sectionally rounded support surface of a hoist equalizer to permit relative angular movement between the adaptor and the equalizer. The contact surfaces of the adpator and equalizer are hard faced to reduce wear.