A vehicle-attached, task-associated excavation implement with interchangeable rotational excavation apparatuses is conceptualized in this application. The implement is similar to McGee's Tractor-Mounted Excavation Implement, but is conceptualized in a new way of combing parts or portions of the implement with vehicles currently existing in the prior art, without the need for a tractor equipped with power-take-off. This vehicle-attached implement can be supported by a variety of motorized vehicles, utilizing a variety of apparatus-powering options. An assortment of steering options could be used, and movements of the apparatuses, either with or separate from the implement, provide diverse functionality. Tasks supported by the rotational excavating apparatuses include Foundation footings, trenches, rounded ditches, shallow V-shaped ditches, landscape or garden beds, and shallow graded depressions for sidewalks or simple slabs. Excavating apparatuses have claws or cutting elements attached to surface at angles to propel soil directionally.

A bit assembly includes a base block and a bit holder having a forward body portion and a shank. The bit holder includes a diametrically expanding retainer circumferentially disposed around a shank of the bit holder adapted to maintain the interference contact between the bit holder and the base block as the diameter of a bore of the base block increases from use. The bit assembly also includes a sealing gasket that forms a force fit between a washer disposed about the shank of the bit holder and the base block.

A holder block assembly for a drum-type cutting tool has a holder block and a sleeve that is removably held in the holder block to carry a cutter bit. The sleeve includes a shank received in a hole in a cutter block and a nut threaded on the shank. The nut is turned by a hand tool to extract the sleeve from the holder block.

A tooth and a toothholder for a mulching apparatus. The tooth includes a body, a cutting element mounted to the body, and a mounting element projecting from the body. The toothholder includes a mounting recess for receiving the mounting element. The mounting element engages the mounting recess to prevent rotation of the tooth relative to the toothholder. The mounting element may be shaped to engage with the toothholder to prevent rotation of the tooth relative to the toothholder. The mounting element may include a plurality of outer engagement surfaces. The plurality of outer engagement surfaces may define an exterior profile of the mounting element that is polygonal in shape.

Equipment (10) for excavating solid surfaces S such as for example made of asphalt or cement or similar solid material, in particular for obtaining or excavating trenches in said solid surfaces, said equipment (10) comprising working or excavating means (16) rotatably supported by a main frame (11), and a setting frame (30) which defines at least one contact portion (33) substantially flat and adapted to be put into contact with a corresponding portion of the surface S to be worked on, wherein the position of said setting frame (30) with respect to said main supporting frame (11) may be set so as to set the working depth K of said working means (16); wherein the said setting frame (30) is rotatably not constrained to said main supporting frame (11) in such a way that the setting frame, regardless of the particular working conditions, always perfectly lies on the surface to be worked on S.

A protective wear sleeve for a cutting tool assembly that includes a solid body that has a shaft portion, a radial collar portion, and a central bore that defines a central axis. The shaft has a forward end and a rearward end, wherein the radial collar is integral with the forward end. The radial collar has a ring support surface that faces at least partially in an outward radial direction. The forward end of the shaft and the radial collar together define a tooth support surface that faces in a forward direction and has an outer diameter. At least one wear ring is disposed on the ring support surface and extends around the radial collar. The at least one wear ring has a hardness greater than that of the radial collar and has an outer diameter greater than that of the outer diameter of the tooth support surface.

A tool holder insertion device includes a frame extending from a proximal end to a distal end, the frame including first and second longitudinal arms extending between the distal end and the proximal end. The frame also includes a distal transverse arm connected to respective distal ends of the first and second longitudinal arms, a proximal transverse arm opposite the distal transverse arm, and an internal space extending from the distal transverse arm, the internal space forming an insertion opening. The tool holder insertion device also includes a drive assembly fixed to the frame, the drive assembly including a pushing surface that is movable within the internal space toward the distal end of the frame.

A roller tool for a soil cultivation roller of a soil cultivation machine includes a tool carrier to be fixed on an outer circumferential side of a carrier cladding of a soil cultivation roller, a quick-change tool holder to be detachably fixed on the tool carrier, and an exchangeable tool to be detachably fixed on the quick-change tool holder.

A replaceable tooth assembly. A number of tooth assemblies are provided round the periphery of a microtrenching blade. The assemblies include a cartridge, usually welded to the periphery of the microtrenching blade, and a tooth, which has a projection or flange shaped to fit within a cavity formed in the cartridge. The cartridge and projection each have a transverse hole formed in them, which, when aligned, form a continuous passage for placement of a removable pin which is used to join the cartridge to the tooth body. The cartridge may also have a more radially-aligned channel which intersects the cavity, which a rubber shim may be placed in. Such a shim reduces the relative vibration between the tooth and cartridge, improving life and reducing wear.

A link for an excavating chain for a ballast excavating device below a railroad track, the link comprising a body extending longitudinally between a front end and a rear end and being crossed by at least one front through-hole and a rear through-hole configured to receive hinge means with an adjacent link of the chain, the front and rear through-holes extending along axes parallel to each other and contained in a reference plane of the body, the link further comprising, on an inner side of the body with respect to the reference plane opposite to the outer side, a concave guide surface extending over an envelope having an axis generator parallel to the axes of the link joints, the guide surface being configured to at least locally match a curvature of a return member of the excavating device.