A bucket wheel machine 100 having a base 102 and an operating block 104. The operating block has a bucket wheel 106, a bearing 112,114, and at least one of a ring chute 120, a bucket wheel chute 108, and a bucket wheel drive 116. The operating block 104 is detachably attached to the base of the bucket wheel machine 102. The operating block 104 also has a support frame 130 which is connected to the bearing 112,114.

A dredging head assembly for deploying on the bed of a body of water, is provided, the assembly comprising a cutter housing having a cutting opening for extending over a section of the bed from which material is to be removed; a cutting assembly disposed within the cutter housing, the cutting assembly operable through the cutting opening in the cutter housing to loosen material from the bed; and an outlet opening in the cutter housing for removing water and entrained material from within the cutter housing under suction; wherein the cutter housing comprises a plurality of holes therein, in use water being drawn into the cutter housing through the holes under the action of reduced fluid pressure within the cutter housing. A dredging assembly comprising the dredging head assembly and a method of dredging are also provided.

A work vehicle includes circuitry configured to determine a focused area based on signals detected by work and travel situation detection sensors. The circuitry is configured to determine a prioritized display image among images captured by cameras, the prioritized display image including the focused area. The circuitry is configured to compose the images captured by the cameras by view-point converting the images to generate an overhead image around the vehicle body. The circuitry is configured to generate at least one monitor display image including a first display area in which the overhead image is displayed and a second display area in which the prioritized display image is displayed.

The invention relates to a boring machine (10) including: a frame (12) bearing at least a first rotary milling drum, at least a first arm (40) movable with respect to the body (16); at least a first support (64) bearing the first milling drum (60), the first support (64) being connected to the lower end part (40b) of the first arm (40), an actuating device (50) to displace at least the first arm (40) with respect to the body (16). The invention is characterized by the fact that the body further includes: a translational guiding device (30) extending along the longitudinal direction, the boring machine further comprising a movable member displaceable with respect to the body along the longitudinal direction while being guided by the translational guiding device (30), the first arm (40) being mounted pivotably on the movable member (34).

A system for uncovering and sealing a narrow trench. The system comprises several subsystems, including a work machine, a frame for providing a seal with the surface to be trenched, a saw blade, a vacuum system, a system for placing product, and a resealer. The blade includes rotatable tooth bits, which may be rotated and secured to create a blade for narrower or a wider trench. A removable cover and the blade are easily changeable. A surface engaging member on the frame is manipulated to maintain a seal with changing ground surfaces. Additionally, the vertical location of the blade within the frame is adjustable to create a deeper or shallower trench.

A system for uncovering and sealing a narrow trench. The system comprises several subsystems, including a work machine, a frame for providing a seal with the surface to be trenched, a saw blade, a vacuum system, a system for placing product, and a resealer. The blade includes rotatable tooth bits, which may be rotated and secured to create a blade for narrower or a wider trench. A removable cover and the blade are easily changeable. A surface engaging member on the frame is manipulated to maintain a seal with changing ground surfaces. Additionally, the vertical location of the blade within the frame is adjustable to create a deeper or shallower trench.

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.

A pivotally flexible motor mount for a rotary trenching tool allows for increased life of the overall system. A flexible motor mount includes a universal pivot arrangement that allows a motor housing to universally pivot relative to a boom to accommodate misalignment between a motor shaft axis and a rock wheel rotation axis. The flexible motor mount also includes a first pair of spherical connection joints aligned along a first pivot axis and a second pair of spherical connection joints aligned along a second pivot axis. The first and second pivot axes are generally perpendicular relative to one another. The flexible motor mount further includes a component mounting plate attached to the motor housing and an intermediate plate coupled to the component mounting plate by the first pair of spherical connection joints. The intermediate plate is also coupled to the boom by the second pair of spherical connection joints.

Implementations of the accessory and associated methods allow for excavation of a ditch, wherein rotating grating means are used for expelling rubble and form a ditch. The accessory includes grating means which are moved with respect to the ditch to ensure contacting of the grating means with the road and alignment of a rotation axis of the grating means with the ditch axis. The ditch is progressively excavated when the grating means are rotated and displaced along the ditch axis. The grating means may be connectable to a mobile device through an arm assembly configured to controllably move the grating means from the mobile device. The accessory may be used for connection to a mining device for excavating the ditch along the road of an underground mining tunnel.

A 3D volume rate control method and apparatus (10) for a slewing bucket-wheel stockpile reclaimer 16 is described. The apparatus (10) comprises four 3D image sensors (12) mounted adjacent a bucket-wheel (14) of the (reclaimer 16), which are adapted to provide 3D images of a stockpile bench face. The apparatus includes a data processor (20) for: (i) processing the 3D images produced by the 3D image sensors (12) to generate a 3D stockpile bench face profile, (ii) calculating a reclaim cut volume rate at which material is being cut from the stockpile face based on a measured change in volume of the 3D stockpile bench face profile in the area abutting the excavation tool, (iii) calculating a reclaim cut volume of material that will be cut from the stockpile face based on the shape of the excavation tool and the 3D stockpile bench face profile to determine a feed forward reclaim cut volume rate profile, and (iv) calculating an operating parameter for the reclaimer based on a desired reclaim cut volume rate compared to the measured reclaim cut volume rate and the feed forward reclaim cut volume rate profile. The method and apparatus provide accurate reclaim volume measurement so that the reclaim volume rate becomes independent of the product characteristics, stockpile bench face shape and bucket-wheel cutting parameters.