Methods, systems, and devices, are developed for in-situ placement of a concrete mix that can have the thixotropy to hold vertical dimension without containment, while maintaining pliability to be pumped into place and manipulated to a desired shape, and can be combined with concrete set accelerators, allowing subsequent layers of this concrete mix to be continuously stacked in place to build tall walls and such without the use of forms. Concrete without these special properties is pumped toward the point of placement where it is modified by injecting and mixing, into that line of pumped concrete, an admixture containing thixotropes, thickeners and/or set accelerators or other modifiers to provide these properties and other improvements. This method allows conventional plant batching with commonly available constituent materials for batching an economical concrete that is delivered to a jobsite and then is pumped most of the way to a point of placement.

A device includes a remote control apparatus with a control lever that is pivotably mounted to the remote control apparatus. The control lever is pivotable within an inner zero-position range, an outer travel range, and an oscillation damping range located between the inner zero-position range and the outer travel range. The remote control apparatus is configured to cause movement of a large manipulator, which has an active oscillation damping mode, switch on the active oscillation damping mode and cause movement of the large manipulator when the control lever is within the outer travel range, switch off the active oscillation damping mode when the control lever is located in the zero-position range, and switch on the active oscillation damping mode without causing movement of the large manipulator when the control lever is located within the oscillation damping range.

Construction systems for constructing a structure on a foundation and methods relating thereto are disclosed. In an embodiment, the construction system includes a rail assembly configured to be mounted to the foundation. In addition, the construction system includes a gantry movably disposed on the rail assembly configured to translate along a first axis relative to the rail assembly. Further, the construction system includes a printing assembly movably disposed on the gantry and configured to translate along a second axis relative to the gantry. The second axis is orthogonal to the first axis. The printing assembly is configured to deposit vertically stacked layers of an extrudable building material on the foundation to construct the structure. The gantry has a width along the second axis that is configured to be adjusted relative to the foundation.

A hydraulic system (600) and method for reducing boom dynamics of a boom (30), while providing counter-balance valve protection, includes a hydraulic actuator (110), first and second counter-balance valves (300, 400), first and second control valves (700, 800), and first and second blocking valves (350, 450). A net load (90) is supported by a first chamber (116, 118) of the hydraulic actuator, and a second chamber (118, 116) of the hydraulic actuator may receive fluctuating hydraulic fluid flow from the second control valve to produce a vibratory response (950) that counters environmental vibrations (960) on the boom. The first blocking valve prevents the fluctuating hydraulic fluid flow from opening the first counter-balance valve. The first blocking valve may drain leakage from the first counter-balance valve.

A power supply unit includes inputs for receiving electric energy from multiple electric energy sources. The power supply unit also includes outputs for delivering electric energy for operating working components of a truck-mounted concrete pump. The power supply unit is configured to control consumption of electrical energy from the electric energy sources.

The present disclosure provides a boom, a boom assembly and a work machine. The work machine comprises a boom support structure and the boom assembly connected to the boom support structure, wherein the boom assembly comprises a plurality of first booms hinged to one another, at least one of the first boom is the boom, the boom has a box-type structure and comprises a body comprising a first body portion and a second body portion, the first body portion and the second body portion overlapping each other to enclose and form the box-type structure. The boom can be designed to have a light weight, and a split-type design facilitates simplifying a mold, improving the versatility of a mold, alleviating the inconsistent of thermal deformation of the boom, and facilitating later maintenance.

A system for damping mass-induced vibrations in a machine having a long boom or elongate member, the movement of which causes mass-induced vibration in such boom or elongate member. The system comprises at least one motion sensor operable to measure movement of such boom or elongate member resulting from mass-induced vibration, and a processing unit operable to control a first control valve spool in a pressure control mode and a second control valve spool in a flow control mode in order to adjust the hydraulic fluid flow to the load holding chamber of an actuator attached to the boom or elongate member to dampen the mass-induced vibration. The system further comprises a control manifold fluidically interposed between the actuator and control valve spools that causes the first and second control valve spools to operate, respectively, in pressure and flow control modes.

The present disclosure provides systems, methods, and computer-readable storage devices for building construction from extrudable materials with improved accuracy due to increased stability of components. In some aspects, a construction system includes a frame assembly disposed at a building site and a moveable frame assembly (e.g., gantry) coupled to the frame assembly and configured to move along a first axis. A moveable platform is coupled to and configured to move along the moveable frame assembly along a second axis perpendicular to the first axis. The moveable platform has an opening and a guide structure is disposed within the opening and configured to move along a third axis that is perpendicular to the first and second axes. The guide structure holds a conduit configured to deposit, via a nozzle, extrudable building material at the building site. Use of the guide structure, disposed within the opening, stabilizes the nozzle during material deposition.

A device for a distribution mast includes a line and a line section mounting. The line has a mast line section and a loose rotational line section, and the rotational line section is rotatably connected to the mast line section. The line section mounting has a loose rotational holding element and a rotary bearing, and the rotational holding element keeps the rotational line section at a distance from the mast line section. The rotary bearing is designed to be supported by a mast segment for the distribution mast and for rotatably connecting the rotational holding element to the mast segment and defines a circle, the line being guided through the circle.

The supporting structure for a mobile concrete pump for connecting a distribution boom includes two support leg boxes that cross each other diagonally, and a boom pedestal attached thereto having a turret that has an opening that is surrounded at its one end at least partially by a pivot mount receptacle for a pivot bearing for pivoting the distribution boom of the concrete pump with respect to the turret. Part of the wall of the turret is formed by a side wall of the supporting leg boxes that cross each other, wherein the side walls of the supporting leg boxes are, in a first region in which same form part of the wall of the turret, free of joining points such that loads introduced via the turret directly into the side walls are distributed beyond the first region without shear load of a joining point in the side walls.