The application relates to a modular slurry wall cutter for preparing a slurry trench that is connectable to a carrier machine, said slurry wall cutter having a frame and at least one cutting tool arranged at the frame to break up soil material. The frame here comprises an upper frame part, a middle frame part, and a lower frame part that are releasably connectable to one another, with the upper and lower frame parts being releasably connectable to one another both directly and via the middle frame part that can be arranged therebetween. The application further relates to a carrier machine, such as to a cable excavator, having a slurry wall cutter in accordance with the application.

A hydraulic control for an attachment on a work vehicle. The attachment is mounted on the chassis of the work vehicle and movable between a first position and a second position. A hydraulic cylinder is operable to power movement of the attachment. A fluid circuit communicates with the hydraulic cylinder and is configured to carry hydraulic fluid. A fluid reservoir is in communication with the fluid circuit. Accumulators that are in communication with the fluid circuit automatically store and release hydraulic fluid in response to movement of the attachment. A valve assembly controls fluid communication between the fluid reservoir and the fluid circuit in response to movement of the attachment to its second position.

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.

The application relates to an excavation machine including a cutting head with a first drum and a second drum positioned side by side, in proximity to one another, and configured to turn respectively around a first and a second axis of rotation, the first drum and the second drum including, according to their respective axis of rotation, a proximal end connected to the cutting head, and a distal end opposite to the proximal end. The application also relates to a cutting disc for an excavation machine of this type, as well as a corresponding cutting method.

A spring-loaded feeding device for a ditch digging apparatus. The spring-loaded feeding device includes a shaft rotatably mountable on a frame and rotatable in a direction of rotation, and one or more feeder paddle assemblies. each feeder paddle assembly comprises a bracket on the shaft extending radially outward, the bracket comprising a pivot axis proximate the shaft and a spring-connection point spaced apart from the pivot axis. The feeder paddle assembly also has a feeder paddle with a first end near the shaft and a second end spaced apart from the first end, the feeder paddle extending radially outward from the shaft from the first end to the second end, the feeder paddle being pivotally coupled to the bracket at the pivot axis and also coupled to the bracket by a spring positioned between the feeder paddle and the spring-connection point of the bracket.

A system for uncovering a trench. The system comprises several subsystems, including a work machine and a frame for providing a seal with the surface to be trenched with a saw blade contained therein. The blade is supported on a hub which is slidably movable relative to the frame by operation of a linear actuator, which may be a hydraulic cylinder or the like. The vertical location of the blade within the frame is continuously adjustable to create a deeper or shallower trench. A monitoring system is provided to monitor the vertical location from an operator station.

Provided is a cutting wheel assembly comprising: a frame having two spaced support pillars, each having an intermediate portion at an angle to upper and lower portions; a pair of outer cutting wheels arranged either side of an inner cutting wheel all supported on the lower portions of the support pillars about a common axis of rotation; each cutting wheel having a central hub portion about which an annular cutting portion is provided having a respective cutting diameter; the inner cutting wheel having a different cutting diameter to that of the outer cutting wheels, and the central hub portions of neighboring cutting wheels defining a respective gap in which the intermediate portion of a respective pillar is received; at least one of the annular cutting portions of the inner and/or the outer cutting wheels having one or more rim portion(s) that overlap each gap so the annular cutting portions provide a cutting action along a continuous line of cut.

A milling attachment for a work machine includes a frame including first and second frame side walls and a frame top. The frame top includes a movable front cover portion. A first adjustable side plate has a first ground engaging portion for engaging the ground surface. A first actuator is operably associated with the first adjustable side plate for raising and lowering the first adjustable side plate relative to the first frame side wall. A first actuator extension connects the first actuator to the movable front cover portion, the first actuator extension being configured such that the movable front cover portion is moved relative to the frame when the first adjustable side plate is raised or lowered relative to the frame.

The invention relates to a drilling machine (10) for making an excavation in ground in a drilling direction, said drilling machine comprising: an anchor module (12) having an anchor device for preventing the anchor module from moving in the drilling direction relative to the ground by bearing against one of the walls of the excavation; a drilling module (20) provided with cutter members connected to the anchor module while being movable in translation relative to the anchor module; and movement means (35) for moving the cutter members in translation relative to the anchor module. The drilling module is also hinged relative to the anchor module, and the drilling machine comprises first path correction means (40) for causing the drilling module to pivot relative to the anchor module about a pivot axis (X) perpendicular to the drilling direction.

A ditch forming apparatus having: a frame; a primary ditch forming assembly having: a) a first subassembly for penetrating and separating subjacent ground material; and b) a second subassembly for directing separated ground material away from a ditch being formed; and a ground treatment assembly to facilitate delivery of ground material to the second subassembly and having a ground engaging component that is turned around a first axis. At least one of: a) a vertical height of the first axis relative to the frame; b) a variable vertical force generated between the at least one ground engaging component and frame; c) a fore and aft position of the first axis relative to the frame; d) a speed of turning of the at least one ground engaging component around the first axis; and e) a direction of turning of the at least one ground engaging component around the first axis, can be changed.