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A grader (1) comprising a body (2), at least one implement (10, 12, 14, 16) movably carried by the body (2), at least one hydraulic actuator (20, 22, 24, 26, 28, 30), adapted to control the movement of the implement (10, 12, 14, 16), a hydraulic arrangement (32) configured to provide pressurized hydraulic fluid towards the hydraulic actuator (20, 22, 24, 26, 28, 30), and comprising a variable-displacement load-sensing pump (36), a main control valve (40), a supply line (39) fluidly connecting the outlet of the pump (36) with the main control valve (40), a control lever (42) connected to the main control valve (40), a load sensing line (46) fluidly connecting the outlet of main control valve (40) with the load-sensing port of the pump (36), and a solenoid-controlled valve (50) fluidly interposed between the load sensing line (46) and the load-sensing port of the hydraulic pump (36), and configured to modify, on command, the pressure signal provided to the load sensing port of the pump (36).

The present invention pertains to an excavation accessory (100) suitable for connection to an operating unit, such as a skid loader (101), skid-steer loader, tractor (102), or bulldozer (103), which supplies the operating energy. This excavation accessory (100) comprises an excavation assembly (1), which includes a support structure (2), a drum cutter (4), and/or a disc cutter (5). mounted respectively on at least one main axis of rotation (8), wherein said drum cutter (4) and/or a disc cutter (5) are operatively connected to an actuator (10, 11), wherein said excavation assembly (1) comprises an energy accumulator (13) independent of said operating unit and mounted on board said excavation assembly (1), wherein said energy accumulator (13) is capable of providing instantaneous power to said actuator (10, 11).

The invention concerns a building element for an intake volume in a basin comprising a bottom surface and a water intake. The building element comprises a side wall, a lower end and an upper end. The lower end is suitable for being laid down on the bottom surface of the basin, such that the side wall and the bottom surface define an intake volume comprising the water intake of the basin. From the upper end a protection permeable cage protrudes comprising a door configured for the passage of an operator. The invention also concerns a method for laying down such a building element.

An apparatus and method for laying a waterproofing membrane on a surface of a waterbed is described, wherein a roll-carrying vehicle is remotely controlled on the surface to transport at least one roll of the membrane in a laying direction so as to unroll the membrane at least along a slope of the waterbed, and wherein a winch-carrying vehicle carries a winch device with at least one flexible traction element connected to said roll- carrying vehicle during a movement of the latter along the slope of the waterbed, whereby the flexible element is tensioned by said roll-carrying vehicle to assist in guiding it.

本实用新型公开了一种用于边坡快速生态修复的三维植被网垫防护装置，包括边坡主体，所述边坡主体上铺设有三维植被网垫主体，所述三维植被网垫主体的两端安装有牵引组件；所述牵引组件包括重力牵引座、插孔、限位槽、两个导向杆、压板、螺纹杆和插杆；所述限位槽开设于重力牵引座的内部。本实用新型通过定位组件可以限定三维植被网垫主体的顶部位置，此种固定方式操作时更方便，无需铲土，而且固定后牢固性更好，而通过牵引组件，可以带动三维植被网垫主体沿着坡面自动滚动铺展，在铺展后，工作人员只需要在底部调整三维植被网垫主体的整体位置即可，进而免去了人工逐步铺展的步骤，提高了施工效率，降低了工作人员的劳动强度。

Ein Hydrauliksystem (1) für einen Frontlader (2) eines Nutzfahrzeuges (3) weist einen doppelt wirkenden Hubzylinder (6) und einen doppelt wirkenden Kippzylinder (18) auf. Der Kippzylinder (18) und der Hubzylinder (6) sind Differentialzylinder mit einer Kolbenbodenseite (25, 29) und einer Kolbenstangenseite (24, 28). Das Hydrauliksystem (1) ist mittels Hauptleitungen (35, 36, 37, 38), die an die Kolbenbodenseite (25, 29) und die Kolbenstangenseite (24, 28) des Hubzylinders (6) und des Kippzylinders (18) angeschlossen sind, mit einer Pumpe (31) oder einem Wegeventil (32, 33) verbunden. Die Kolbenbodenseite (29) des Kippzylinders (18) ist über eine erste Ausgleichsleitung (42) mit einem Überdruckventil (44, 45) mit der Kolbenbodenseite (25) des Hubzylinders (6) verbunden und die Kolbenstangenseite (28) des Kippzylinders (18) ist über eine zweite Ausgleichsleitung (43) mit einem Überdruckventil (44, 46) mit der Kolbenstangenseite (24) des Hubzylinders (6) verbunden.

A control method of a working machine is a control method of the working machine including an electric motor driven by electric power of a battery and a hydraulic pump driven by the electric motor and configured to supply hydraulic oil to a hydraulic actuator. This control method includes: driving the electric motor at a steady rotation speed when a monitored temperature is in a normal temperature region; and setting an upper limit value of a rotation speed of the electric motor to a regulated rotation speed lower than the steady rotation speed when the monitored temperature is in a low temperature region lower than the normal temperature region.