An attachment monitoring system according to an embodiment includes a working machine, attachments, a measurement unit, a terminal device, and a server device. The working machine includes a working arm. Each of the attachments is attached to a leading end part of the working arm so as to be driven by a fluid pressure. The measurement unit is provided to measure at least one of a vibration and the fluid pressure when each of the attachments identified on the basis of individual identifying information is driven. The terminal device is provided in the working machine to acquire measured results of the measurement unit. The server device collects the measured results of the respective attachments from the terminal device, and analyzes operation states of the respective attachments on the basis of the collected measured results.

A hydraulic accumulator including an energy storage apparatus with a first piston face configured to reversibly compress an energy storage medium and a second piston face forming at least part of an inner surface of a corresponding second fluid chamber reversibly expandable by movement of the second piston face. A third piston face forms at least part of an inner surface of a corresponding third fluid chamber reversibly expandable by the third piston face. The first, second and third piston faces are coupled together.

An apparatus (1) with a reciprocating component (3) fitted with composite cushioning slides (13) on an exterior surface (8, 9). The reciprocating component (3) is movable along a reciprocation path and the composite cushioning slide (13) includes an exterior first layer (14) and an interior second layer (15). The first layer (14) is formed with an exterior surface (16) configured and orientated to come into sliding contact with a containment surface (7) of the apparatus (1) during the reciprocating movement of the reciprocating component (3), the first layer (14) is formed from a material of predetermined friction and/or abrasion resistance properties. The interior second layer (15) is located between the first layer (14) and reciprocating component (3) and is formed from a shock-absorbing material having predetermined shock absorbing properties.

A method of regulating the disassembly of a component from a powered tool assembly that uses a pressurized fluid and a locking member that is in operative association or communication with the fluid is provided. The method comprises biasing the locking member into a locked configuration using the pressurized fluid, preventing movement of the component in a first predetermined direction.

A seal of a tool of a breaking hammer, a sealing arrangement, a breaking hammer and a method of sealing a tool of breaking hammer is provided. The seal is a sealing ring having an outer periphery provided with several projecting elements, which are slanted. The projecting elements generate torque in the sealing ring when being pushed in a transverse direction during use of the breaking hammer. Thus, the sealing ring may rotate relative to the tool.

The present invention relates to a hydraulic breaker comprising: a back head having a gas chamber provided therein; a cylinder disposed at the lower part of the back head, and having a hydraulic passage and a hydraulic space; a front head disposed at the lower part of the cylinder; a chisel provided inside the front head; a piston provided to reciprocate in the cylinder so as to hit the chisel; and a breaker main body having a plurality of penetration bolts integrally connecting the back head, the cylinder, and the front head, wherein the back head of the breaker main body is provided with a control valve for supplying and blocking hydraulic pressure to/from the hydraulic passage and the hydraulic space.

The invention relates to a remote-controlled demolition robot (1) with improved field of application, comprising a chassis (5), a base (7) and a rotatable top (6), a moveable arm means (13), a working tool (13f), a control unit (9), a remote-control device (4, 40) intended to be impacted by an operator (3, 3′) of the demolition robot and arranged to give commands that can be registered by the control unit for operation of the remote-controlled demolition robot. A characteristic is that the demolition robot comprises a broadcasting device (20) and an image reproduction means (30), an image sensor (22:1), which can register first image data (21:1) and second image data (21:2) of a scene of surroundings of the demolition robot from at least two different view directions, that the broadcasting device (20) can communicate with the image reproduction means (30) and that the image reproduction means (30) is arranged to show, in real time, an image area (30a) of said scene to an operator (3′), who with a line thereto can control and operate the demolition robot through indirect viewing, the image sensor (22:1) is arranged to the demolition robot in such a manner that part of the working tool (13f) is visible in the image area.

An excavator breaker storage rack includes a base having a first beam and a second beam running parallel and to rest on a ground surface; a support system attached to the base, the support system having vertical supports extending up from the base; angled supports attached to the base and the vertical supports such that the angled supports are positioned at an angle relative to the base of less than 90 degrees and greater than 10 degrees; one or more base plates attached to and extending away from the one or more angled supports; one or more top plates attached to the one or more angled supports; and one or more arms positioned on opposite sides of the one or more top plates; the support system is to support one or more excavator breakers above the ground surface.

The invention concerns a portable power supply system (30) intended to supply a remotely controlled, electrically driven work machine (1) with electrical power, where the work machine is of the type that demonstrates a propulsion means that includes continuous tracks (8b) and is equipped with a maneuverable arm (10) intended to carry a tool at its free end, and electric motor (19) that is connected to a hydraulic pump (20) and is intended to supply the operating means (8c, 10a) of the machine with a hydraulic medium, whereby the work machine is intended to be connected under normal operation to a primary source of power (30a) via an electrical cable (2′), which primary source of power includes a fixed alternating current electricity distribution grid at the location. In order to be able to supply the current that is required it comprises a DC energy-storage arrangement (29) that, including a secondary source of power (30b), can store energy and, when necessary, supply energy in electrical form; a coupling arrangement (31, 33, 34, 34′) that makes it possible to choose between connecting the primary (30a) or the secondary (30b) source of power to the electric motor in order to drive the same.

A plug assembly configured for installation in a hammer assembly, the plug assembly comprising a cylindrical plug and an anti-rotation component. The cylindrical plug may include a plug head and a plug body. The cylindrical plug may include a receiving feature located in the plug head. The anti-rotation component may include a first locking feature and a second locking feature. The first locking feature may be configured to fixably engage with the receiving feature. The second locking feature may be configured to engage with the hammer assembly.