Abstract: A detachable thumb assembly for a construction equipment machine includes a mounting bracket for attaching the thumb assembly to a digging apparatus of the machine, a thumb pivotally connected on the mounting bracket, a thumb cylinder including a cylinder body connected to the mounting bracket and a cylinder rod which extends from a front end of the cylinder body and which is connected to the thumb. The body of the thumb cylinder is pivotally connected to the mounting bracket at a connection portion of the body which is distinct from a body back end portion.

Abstract: A construction equipment machine has a lower frame and an upper frame rotatably connected, the machine having at least one hydraulic pilot circuit comprising a primary hydraulic pilot line running from the upper frame to the lower frame through a rotary joint for controlling the operation of at least one hydraulic device located on the lower frame, including: a pressure regulating system capable of setting in the pilot circuit a pilot pressure having a value; a hydraulic pressure controlled selecting system which is located on the lower frame and is fed by the primary hydraulic pilot line, at least two independent secondary pilot lines located downstream of the pressure controlled selecting system, and wherein said hydraulic pressure controlled selecting system is capable of selectively and independently supply or not supply pressurized fluid to the independent secondary pilot lines, responsive to the value of the pilot pressure.

Abstract: An excavator includes a frame, and a platform on top of the frame. A hydraulic distribution system is received on top of the frame but below the platform. A pilot valve unit is at least partly received on top of the platform. The platform includes a dedicated hole capable of receiving therethrough at least that part of the pilot valve unit which is received on top of the platform. The pilot valve unit is fixed, directly or indirectly, on the platform. The pilot valve unit can be mounted from below the platform, through the dedicated hole, and is fixed on the platform from above the platform.

Abstract: A skid steer machine having separate left and right hydraulic propulsion units includes an operating ratio change system by which the ratio of the propulsion speed of at least one of the hydraulic propulsion units versus the hydraulic flow directed to the propulsion units can be changed from at least a first ratio to a second ratio and inversely. The operating ratio change system includes an operating ratio change ECU which controls an operating ratio change device to operate in at least a first ratio configuration or a second ratio configuration, and the operating ratio change system operates in an automatic operating mode where the operating ratio change ECU selects the operating ratio according to machine parameters received by the operating ratio change ECU.

Abstract: A construction equipment machine of the loader type is provided and has at least a chassis, a traction arrangement and a loader arrangement. The loader arrangement includes a loader boom structure which is controlled through a two way boom hydraulic cylinder system, and a boom suspension system through which a lift-side of the boom cylinder system may be connected to a hydraulic pressurized accumulator while the drop-side of the boom cylinder system is connected to a tank return line. The tank return line has a flow limiter for limiting the flow of hydraulic oil in the direction from the drop-side of the boom cylinder system to the tank.

Abstract: A hydraulic pilot control arrangement for a spool valve is provided, wherein the spool of the spool valve is biased towards a central position. The arrangement includes a first and a second pilot hydraulic line connected to opposite sides of the spool of the spool valve and a pilot pressure regulating arrangement is provided for selectively establishing or removing a pilot pressure in each of the first and second lines. The arrangement includes a damping device including a chamber divided into a first and a second pressure compartment by a sliding piston, the first and second pressure compartments being connected respectively to the first and second pilot hydraulic lines, and the piston is biased towards a rest position in the chamber.

Abstract: The invention concerns a gearbox (21) for a lift truck with telescopic jib. Such a gearbox comprises a torque converter (30) in input, and an output shift (45), characterized in that it comprises: an input shaft, called primary shaft, connected to the torque converter (30) and whereon is arranged a clutch mechanism (32); a secondary shaft (35) driven in rotation by the clutch mechanism (32); two pinions, namely first (37) and second (38) pinions, mounted freely rotatable on the secondary shaft (5) and capable of being driven alternately therewith depending on the movement of a synchronizing device; a tertiary shaft (40) coupled with the secondary shaft (45) through the first pinion (37) and a reversing pinion (42) driven by the second pinion (38), the tertiary shaft (40) comprising a plurality of pinions (39, 41, 46, 47) for coupling with the output shaft (45), in accordance with the desired transmission ratio.

Abstract: The invention relates to an extendible dipper assembly (32) for a backhoe arm for a construction equipment machine, said arm comprising a boom to be attached to the machine, and an extendible dipper assembly (32) articulated at the free end of the boom (30) for holding a working 38 tool, said extendible dipper assembly (32) comprising a proximal part (34) articulated to the boom (30) and a distal part (36) which is slidingly connected to the proximal part so as to form a length-adjustable dipper assembly, characterized in that at least one of the dipper parts (34, 36) comprises a rectilinear profile made by extrusion of metal, said profile having a closed cross-section around at least one inner cavity.

Abstract: The disclosed device controls the steering of a commercial vehicle and comprises front wheels that can be oriented according to a first turning angle by a first actuator, rear wheels oriented according to a second turning angle by a second actuator, and a power circuit with a pressurized fluid source and power components that transmit hydraulic power to the actuators. The power components are controllable to configure the power circuit according to coupling modes between the front and rear wheels. The device includes a control circuit containing a power source and control components that are electrically controlled by an electrical control unit and transmit hydraulic commands relating to one of the determined coupling modes to the power components. The control components are hydraulically connected such that in the event of a fault in the electrical control, the commands permanently maintain the power circuit in the current coupling mode.

Abstract: A skid steer machine having separate left and right hydraulic propulsion units includes an operating ratio change system by which the ratio of the propulsion speed of at least one of the hydraulic propulsion units versus the hydraulic flow directed to the propulsion units can be changed from at least a first ratio to a second ratio and inversely. The operating ratio change system includes an operating ratio change ECU which controls an operating ratio change device to operate in at least a first ratio configuration or a second ratio configuration, and the operating ratio change system operates in an automatic operating mode where the operating ratio change ECU selects the operating ratio according to machine parameters received by the operating ratio change ECU.

Abstract: The invention relates to a hydraulic circuit (20) for public works vehicles. The circuit comprises: a pump (21) which is driven by a heat engine (22) using a load sensing technique; a hydraulic motor (10) which is used to move one part of the vehicle (8) and a set of hydraulic actuators (12-14); at least one distributor (29) which supplies the hydraulic actuators (12-13) in a controlled manner; and a device (45) for cooling the fluid circulating through the circuit. The inventive circuit is characterised in that it comprises: a pressure-reducing device (33) which is connected to the outlet of the pump (21) and which delivers a first pressure level, said device (33) being connected to the feed port (34) of the hydraulic motor (10); and an assembly which connects a check valve (40) and a calibrated orifice (41) in parallel, said assembly being connected downstream of the feed port (34) of the hydraulic motor and the return line (36) of the distributor (29) and upstream of the cooling device (45).

Abstract: A construction equipment machine has a lower frame and an upper frame rotatably connected, the machine having at least one hydraulic pilot circuit comprising a primary hydraulic pilot line running from the upper frame to the lower frame through a rotary joint for controlling the operation of at least one hydraulic device located on the lower frame, including: a pressure regulating system capable of setting in the pilot circuit a pilot pressure having a value; a hydraulic pressure controlled selecting system which is located on the lower frame and is fed by the primary hydraulic pilot line, at least two independent secondary pilot lines located downstream of the pressure controlled selecting system, and wherein said hydraulic pressure controlled selecting system is capable of selectively and independently supply or not supply pressurized fluid to the independent secondary pilot lines, responsive to the value of the pilot pressure.

Abstract: The invention relates to a device for controlling the steering of a commercial vehicle comprising: two front wheels (126, 127) that can be oriented according to a first turning angle by means of at least one first actuator (120); two rear wheels (136, 137) that can be oriented according to a second turning angle by means of at least one second actuator (130); and a power circuit (101) comprising a pressurised fluid source and power components (111, 112, 113, 114, 115) that can transmit the hydraulic power to the actuators, said power components (111, 112, 113, 114, 115) being controllable in such away as to configure the power circuit (101) according to different coupling modes between the front wheels (126, 127) and the rear wheels (136, 137).

Abstract: The invention relates to a civil engineering loading machine (1) provided with a frame (5) and working equipment (2) which comprises at least one arm (3), an arm actuator (7) for rotatably displacing said arm (3) with respect to the frame (5), a working tool (15) hingable with respect to the arm (3), a main cinematic chain (20, 21) forming together with the working tool (15) part and the arm (3) part a main deformable mechanism and a controllable tool actuator (27) for generating the deformation of the main deformable mechanism in such a way that the inclination angle (100) of the working tool (15) with respect to the arm (3) is provided.