Abstract: An excavator may perform a finishing operation to prepare a slope while maintaining workability. The excavator includes an undercarriage, a slewing upper structure rotatably mounted on the undercarriage, a boom pivotally mounted on the upper structure, an arm rotatably mounted on a tip end of the boom, a bucket mounted on a tip end of the arm, and a controller. The controller restricts a lowering operation of the boom, so that at least one of a pressing force of the bucket against the ground and a speed of lowering the bucket toward the ground does not become relatively large.

Abstract: A shovel includes a cabin, a display device attached to the cabin, and a main pump. An internal combustion is configured to drive the main pump. An information acquiring device is provided. A controller is configured to calculate an amount of work based on the information acquired by the information acquiring device and to cause the display device to display the amount of work per predetermined period of time in a chronological order.

Abstract: A shovel includes a lower traveling body, an upper turning body turnably attached to the lower traveling body, a boom pivotably attached to the upper turning body, an arm pivotably attached to the boom, an engine mounted on the upper turning body, a hydraulic pump mounted on the upper turning body, a fuel tank mounted on the upper turning body, a work walkway provided on an upper surface of the fuel tank for the movement of a worker, and a rollover valve provided at the top of the fuel tank at a position different from the work walkway.

Abstract: A shovel includes a lower traveling body, an upper turning body turnably mounted on the lower traveling body, a cab mounted on the upper turning body, a display device provided in the cab and configured to display a setting screen associated with work assistance, an audio input device provided in the cab, and a hardware processor configured to perform audio recognition. The hardware processor is configured to recognize speech input through the audio input device and executes a process related to the setting screen according to a recognition result.

Abstract: A shovel includes a lower traveling body, an upper turning body turnably mounted on the lower traveling body, an attachment attached to the upper turning body, a cabin mounted on the upper turning body, and a protection member configured to protect the cabin. The protection member is provided on the attachment or the upper turning body at a position corresponding to the front of the cabin.

Abstract: A shovel includes a lower traveling body, an upper turning body, an attachment including a boom, an arm, and an end attachment, a boom state detector configured to detect the state of the boom, an arm state detector configured to detect the state of the arm, an end attachment state detector configured to detect the state of the end attachment, and a hardware processor. The hardware processor is configured to obtain information on the position of the end attachment based on the respective outputs of the detectors, correlate the information on the position of the end attachment with information on the position of an underground object obtained based on the output of an underground object detector, and calculate the distance between the end attachment and the underground object. The hardware processor is further configured to control the shovel such that the distance is prevented from falling below a predetermined value.

Abstract: A shovel includes a lower traveling body, an upper turning body turnably mounted on the lower traveling body, a cab installed on the upper turning body, a display device installed in the cab, and image capturing devices attached to the upper turning body. The display device is configured to simultaneously display a left mirror image and a right mirror image generated based on an image captured by at least one of the image capturing devices. The left mirror image is an image corresponding to a mirror image in a left mirror attached to the left front end of the shovel. The right mirror image is an image corresponding to a mirror image in a right mirror attached to the right front end of the shovel.

Abstract: A shovel includes a lower traveling body, an upper turning body turnably mounted on the lower traveling body, a cab mounted on the upper turning body, an attachment attached to the upper turning body, and a display device provided in the cab. The display device is configured to display an image. The image includes numerical information items indicating the relationship between two positions of the leading edge of the attachment at two points of time and graphics each corresponding to one of the numerical information items.

Abstract: A shovel according to an embodiment of the present invention includes a lower traveling body, an upper turning body pivotally mounted on the lower traveling body, a hydraulic pump mounted on the upper turning body, a hydraulic actuator driven by hydraulic oil discharged from the hydraulic pump, an operating device used to operate the actuator, and a control device configured to control an acceleration/deceleration characteristic of the hydraulic actuator in response to an operation of the operating device depending on a work mode.

Abstract: A shovel includes a traveling body, a turning body turnably mounted on the traveling body, an attachment attached to the turning body and including a boom, an arm, and a bucket, and a hardware processor. The hardware processor is configured to output a warning about the operation of at least one of the traveling body, the turning body, and the attachment when the shovel is on sloping ground or is likely to enter sloping ground. The hardware processor is configured to output the warning when the traveling body is traveling on the sloping ground in a downward direction or is likely to travel on the sloping ground in the downward direction. The warning alerts an operator to the tipping of the shovel in the downward direction of the sloping ground.

Abstract: A shovel includes a lower traveling body, an upper turning body turnably mounted on the lower traveling body, a cab mounted on the upper turning body, an operating apparatus installed in the cab, an actuator driven with the operating apparatus, and a processor configured to restrict the movement of the actuator. The processor is configured to determine the necessity of a restriction related to the movement of the actuator in accordance with whether the operating apparatus is operated with an operator's hand.

Abstract: An excavator includes a lower travelling body; an upper turning body mounted on the lower travelling body; a hydraulic pump installed in the upper turning body; a travelling hydraulic motor that is a variable displacement type motor configured to move the lower travelling body by being driven by hydraulic oil discharged by the hydraulic pump; and a control device configured to control a motor capacity of the travelling hydraulic motor so as to be switchable between a plurality of levels. The control device switches the motor capacity to a low rotation setting upon detecting that an operation for changing a travelling direction of the lower travelling body is performed.

Abstract: A shovel includes a lower traveling body, an upper turning body turnably mounted on the lower traveling body, an engine provided in the upper turning body, a hydraulic pump and a hydraulic oil tank provided in the upper turning body, a plurality of hydraulic actuators driven by the hydraulic pump, and a hydraulic circuit connected to the hydraulic pump, wherein the hydraulic circuit includes a plurality of control valves configured to control flows of hydraulic oil between the hydraulic pump and the plurality of hydraulic actuators, and a unified bleed-off valve configured to collectively control bleed-off flowrates of the plurality of control valves, wherein the hydraulic circuit is configured so that a discharge pressure of the hydraulic pump becomes equal to or less than a predetermined pressure during start-up of the engine.

Abstract: A shovel management apparatus configured to manage a shovel including a lower traveling body, an upper turning body mounted on the lower traveling body via a turning mechanism, and an excavation attachment attached to the upper turning body includes a memory and a processor coupled to the memory. The processor is configured to obtain fuel consumption information regarding the fuel consumption of the shovel and work mode information indicating the work mode of the shovel set by an operator and aggregate the fuel consumption information according to the work mode.

Abstract: Problem to be Solved The present invention provides a method for continuous on-site repaving of an asphalt mixture layer of a road pavement and a motor-driven vehicle system therefor, while moving the motor-driven vehicle system.

Abstract: Disclosed are systems and related methods for mounting a ground-engaging motive device, such as a crawler track assembly, to a vehicle, such as a crane or the like, in either an extended or a retracted position. The systems and methods are adapted to ensure that proper alignment is reliably achieved between the mounting structures on the motive device and the corresponding mounting structures on the vehicle in both the extended and retracted positions. In one embodiment, the system and method are especially adapted for use in extending the crawler track assemblies on certain types of existing cranes without the need for extensive retrofitting.

Abstract: A method of assembling a heavy duty mobile crane having a load handling boom that has a boom base section and other component parts. The method includes positioning the component parts adjacent said crane, such as on a truck, raising the parts from the truck bed in sequence with a self-contained lifter associated with said base section, lowering and placing each part in a position adjacent ground level for connection to said crane, and then connecting the parts to the crane so as to provide a complete working crane. The method applies particularly to assembling the boom sections and connecting them to the crane. Extension sections of the boom are handled by placing them at ground level and preassembling the sections to form an upper boom, and then connecting the upper boom to the base section. The method steps are reversed to disassemble the crane. The method also includes transporting the crane to a work site with the boom base section connected to the mobile crane.

Abstract: A locking and latching system for use with a telescoping boom assembly in a crane or other lifting device is provided. The system may include complementary devices for latching and unlocking a selected boom section for telescoping movement relative to a next-adjacent boom section using an extension cylinder. Preferably, the devices are activated in a predetermined sequence using a single motive device. The motive device may include a single cylinder for performing both the locking and latching function. The locking and latching cylinder may be axially aligned with the extension cylinder to create a relatively compact locking and latching system that easily fits within the confines of the innermost boom section in a conventional boom assembly.

Abstract: A boom assembly for a crane or other lifting device is provided. The boom assembly includes a plurality of telescoping boom sections, each having an at least partially rounded portion, and a plurality of corresponding wear pads for reducing friction between the adjacent boom sections during relative telescoping movement. The rounded portion includes a plurality of equiangular breaks. Each wear pad is substantially identical and includes a contoured engagement surface for positioning adjacent to one of the plurality of breaks at the lower front end of each boom section. The identical wear pads are interchangeable, which eliminates the need for keeping a plurality of substantially different shapes or sizes of wear pads on hand for positioning at the lower front ends of adjacent boom sections. Spacers may also be provided between the wear pads positioned adjacent to the breaks on outer boom sections to prevent shifting during the relative telescoping movement.

Abstract: A pull out step assembly is provided to assist in climbing into or out of a cab of a crane, excavator or similar vehicle. The step assembly includes a pair of brackets carrying forward and rearward rollers and a step having support guides for embracing the rollers to prevent the step from shifting laterally during use. A locking mechanism positively secures the step in place in both the extended and retracted positions. The locking mechanism includes an operating shaft having a pivotal handle positioned below the step for easy access and a dual crank. The crank receives the ends of a pair of reciprocal locking rods that extend transversely to engage corresponding pairs of forward and rearward slots formed in the brackets. A compression spring supplies a biasing force to keep the rods engaged in the slots. To shift the step, the handle is manually rotated either clockwise or counterclockwise to overcome the biasing force and disengage the rods from the respective slots.