The invention relates to a replaceable blade piece of a working cylinder of a screen crusher. A blade piecehas a frame portion and a blade portion, the longitudinally opposite front surfaces of which form work surfaces. The frame portion has a through hole extending in the longitudinal direction of the blade portion. A channel-like section is formed on opposite sides of the frame portion containing the hole and extends in the vertical direction of a frame portion, between the edge areas of the side with the hole. The invention further relates to a replaceable blade piece holder having a U-shaped frame portion including arm portions, through which extends a longitudinal hole of the frame portion, and a bottom portion. On the opposite surfaces of the arm portions, onto their middle area is formed a bulge, which extends in the vertical direction of the arm portion.

A cutting bit assembly for a mining machine includes a holder having a first surface, a second surface, and a bore extending therebetween, and a bit having a first end and a second end. The bit further includes a tip, a shank, and a shoulder positioned between the tip and the shank. The shank is positioned in the bore of the holder and defines a shank axis. The shoulder engages the first surface of the holder. The shank includes a projection adjacent the second end. The cutting bit assembly also includes a retainer having a groove and a resilient member. The groove engages a portion of the projection. The resilient portion engages the second surface of the holder and biases the retainer along the shank axis and away from the holder.

A cutting bit assembly for a mining machine includes a holder having a first surface, a second surface, and a bore extending therebetween, and a bit having a first end and a second end. The bit further includes a tip, a shank, and a shoulder positioned between the tip and the shank. The shank is positioned in the bore of the holder and defines a shank axis. The shoulder engages the first surface of the holder. The shank includes a projection adjacent the second end. The cutting bit assembly also includes a retainer having a groove and a resilient member. The groove engages a portion of the projection. The resilient portion engages the second surface of the holder and biases the retainer along the shank axis and away from the holder.

Equipment for machining solid surfaces such as for example, surfaces made of asphalt or concrete or similar solid materials, in particular for making sound strips, said equipment comprising rotating machining or digging means carried by a main frame, and rotating means which engage said main supporting frame, wherein the rotation of said rotating means in a predefined direction of rotation results in said main supporting frame being rotated alternately in two opposite directions of rotation.

Equipment for machining solid surfaces such as for example, surfaces made of asphalt or concrete or similar solid materials, in particular for making sound strips, said equipment comprising rotating machining or digging means carried by a main frame, and rotating means which engage said main supporting frame, wherein the rotation of said rotating means in a predefined direction of rotation results in said main supporting frame being rotated alternately in two opposite directions of rotation.

A paddle for a reclaiming drum may include a block of material configured for attachment to a leading edge of a flighting supporting a cutting bit on the reclaiming drum, and the block of material may assist in breaking up and mixing material removed from a surface by the cutting bit as the reclaiming drum is rotated and moved into the surface. The paddle may include two ear portions protruding from opposite sides of a flat, centrally-located, aft-facing surface of the block of material, each of the ear portions including an inwardly-facing chamfered surface configured to interface with an outwardly-facing, leading edge chamfered surface of the flighting such that a gap is maintained between a flat leading edge surface of the flighting located in between the outwardly-facing chamfered surfaces and the flat, centrally-located, aft-facing surface of the block of material when the block of material is attached to the flighting.

The invention proposes a tool and device, with the aid of which it is possible to remove the surface of walls, ceilings and floors also in the corners of contaminated interiors.

A self-contained truck-mounted brick laying machine (2) is described. A truck (1) supports the brick laying machine (2) which is mounted on a frame (3) on the truck chassis. The frame (3) supports packs or pallets of bricks (52, 53) placed on a platform (51). A transfer robot can then pick up an individual brick and move it to, or between either a saw (46) or a router (47) or a carousel (48). The carousel is located coaxially with a tower (10), at the base of the tower (10). The carousel (48) transfers the brick via the tower (10) to an articulated (folding about horizontal axis (16)) telescoping boom comprising first boom element in the form of telescopic boom (12, 14) and second boom element in the form of telescopic stick (15, 17, 18, 19, 20). The bricks are moved along the folding telescoping boom by linearly moving shuttles, to reach a brick laying and adhesive applying head (32). The brick laying and adhesive applying head (32) mounts to element (20) of the stick, about an axis (33) which is disposed horizontally. The poise of the brick laying and adhesive applying head (32) about the axis (33) is adjusted and is set in use so that the base (811) of a clevis (813) of the robotic arm (36) mounts about a horizontal axis, and the tracker component (130) is disposed uppermost on the brick laying and adhesive applying head (32). The brick laying and adhesive applying head (32) applies adhesive to the brick and has a robot that lays the brick. Vision and laser scanning and tracking systems are provided to allow the measurement of as-built slabs, bricks, the monitoring and adjustment of the process and the monitoring of safety zones. The first, or any course of bricks can have the bricks pre machined by the router module (47) so that the top of the course is level once laid.

The present invention relates to a milling drum for removing glued-down floor coverings, in particular wooden floor coverings, preferably parquet floor coverings, in particular multilayer parquet, with a predetermined milling width which determines the width of a floor surface section by running the milling drum over the floor surface section to be machined, having a plurality of cutting plates which are arranged tangentially on the milling drum and which are arranged in a distributed manner on the milling drum, such that, upon a complete revolution of the milling drum, the entire milling width is operable with at least one cutting plate and such that a common width of the cutting plates being in contact simultaneously with the floor surface section to be machined is always smaller than the milling width. The present invention further relates to a corresponding surface milling cutter, and a corresponding method for removing glued-down floor coverings.

A device for cutting a sink opening in a countertop is described. The device includes a base for receiving and securing the countertop. It also includes a cutting assembly that has a rotating cutting tool and a servomotor for controlling a depth of the rotating cutting tool, multiple sets of guide rails attached to said base wherein said cutting assembly moves along said rails; a position controller which controls the position of said cutting assembly and the depth of the rotating cutting tool. The controller uses digital templates of sink openings to position the cutting assembly along the guide rails and sets the depth of the cutting tool.