The invention relates to a system for hydraulic actuation of multiple consumer units comprising a hydraulic circuit (130) operated by means of a hydraulic motor (122) which actuates a consumer unit (111) wherein, downstream of the first consumer unit (111), the hydraulic circuit (130) has at least one secondary circuit (140, 150) having at least a second consumer unit (114, 118) and arranged before the second consumer unit (114) and a pump (113, 117) directly or indirectly actuated by the first consumer unit (111).

A pneumatic tool includes a casing unit, an air motor, a rotary valve, and a turning unit. The rotary valve is mounted to the air motor and is rotatable about a valve axis. The turning unit includes a ring member that surrounds and is rotatably mounted to the casing unit, and that is connected to the rotary valve, such that rotation of the ring member relative to the casing unit drives the rotary valve to rotate about the valve axis relative to the air motor among a first-end position, a second-end position and at least one in-between position for adjusting airflow that travels from an air inlet passage of the casing unit, through an opening and an intermediate passage of the rotary valve, to an air chamber of the air motor.

A power tool operable with an exchangeable tool head, and comprising a tool body, and a hydraulic cylinder with a main piston A quick coupling system is arranged at a free end of the tool body and includes an actuation unit and a locking unit movable by the actuation unit between a released position and a locked position to secure the exchangeable head to the tool body. Thee locking unit comprises a first and a second half-ring radially movable between the released position and the locked position. When in the locked position the locking unit is adapted to secure the exchangeable head to the tool body, such that transmission forces can be exchanged between the exchangeable head and the main piston. When in the released position the locking unit is adapted to release any force applied to the exchangeable head to remove the exchangeable head.

A portable, battery-powered hydraulic unit for hydraulic rescue tools, in particular for spreading or cutting tools, as well as a rescue tool equipped therewith, are disclosed. The hydraulic unit includes at least one hydraulic pump, a hydraulic tank, a compensation device for hydraulic fluid, a manually operated hydraulic control valve, an electromechanical interface for on-demand coupling and decoupling of at least one battery pack, a mechanical-hydraulic interface for connecting a hydraulic tool, and an electric motor operable by the electrical energy of the battery pack for driving the hydraulic pump. The electric motor is formed by a disc-shaped motor whose axial length extending in parallel to the longitudinal axis of its output shaft is shorter than its outer diameter.

A portable, battery-powered hydraulic unit for hydraulic rescue tools, in particular for spreading or cutting tools, as well as a rescue tool equipped therewith, are disclosed. The hydraulic unit includes at least one hydraulic pump, a hydraulic tank, a compensation device for hydraulic fluid, a manually operated hydraulic control valve, an electromechanical interface for on-demand coupling and decoupling of at least one battery pack, a mechanical-hydraulic interface for connecting a hydraulic tool, and an electric motor operable by the electrical energy of the battery pack for driving the hydraulic pump. The electric motor is formed by a disc-shaped motor whose axial length extending in parallel to the longitudinal axis of its output shaft is shorter than its outer diameter.

The present invention relates broadly to pneumatic tools, such as a sander, that provide an optimum output speed and has significant stall torque to reduce the risk of the tool from stalling during use. The tool includes a coupled gear set that drives an output accessory, such as an abrasive pad, at an optimum speed without loss of power or power reduction, and with an amplified stall torque. The coupled gear set may include a first gear set that functions as a speed reducer, and a second gear set that functions as a speed increaser.

A long reach cable cutting tool includes a handle, a motor electrically connectable to a battery, a trigger electrically connected to the motor to provide power from the battery to the motor when the trigger is activated, a pump connected to the motor, the pump is activated to displace a first fluid, a hydraulic actuating system connected to the hydraulic pump, the hydraulic actuating system is movable by the displacement of the first fluid to displace a second fluid, a pole having a first end and a second end, the pole connected to the handle at the first end, and a tool head connected to the pole at the second end, the tool head including a tool head hydraulic actuator hydraulically connected to the hydraulic actuating system, the tool head hydraulic actuator is movable by the displacement of the second fluid to cause relative movement of the actuator with respect to the tool head.

A hydraulic device 10 includes a hydraulic pump 20, a tool 70, an oil passage 30, 32, 50, 52 for sending the pressure oil generated by the hydraulic pump 20 to the tool 70 and returning return oil from the tool 70 to the hydraulic pump 20, a handle 90 configured to be held by one hand of a worker, a switching part 88 disposed at the oil passage 30, 32, 50, 52 and configured to switch a path for at least one of the pressure oil and the return oil, and an operation part 80 for operating the switching part 88. The operation part 80 is disposed at a position that allows the operation part 80 to be operated with the hand of the worker holding the handle 90, or with a finger of the hand holding the handle 90.

There is provided a compact, lightweight, hydraulic electric tool which can perform a long-term operation by minimizing power consumption while preventing operation efficiency from being degraded due to a hot electric motor. An electric tool includes a main body having an oil tank, a hydraulic pump for feeding hydraulic oil to a cylinder part, and an electric motor for driving the hydraulic pump, and a tool head operated by a pressing force of a piston in the cylinder part in a state where the tool head is coupled to the main body. The oil tank is configured to cover a motor case.

A mobile portable tool, such as a spreading device, cutting device or combined device with cutting and spreading function includes a housing. An electric motor is located in the housing. The tool includes a rechargeable battery or a connection to an external electrical energy source. The tool is a mechanically or hydraulically driven and has a displaceable piston rod spreading and/or cutting and/or lifting and/or pressing work. An electronic open-loop and closed-loop control unit controls the electric motor and includes a printed circuit board and control cables with a connector for transporting control signals. For under water operation while still having a simple design, the electric motor is a brushless direct-current motor. The electronic components of the printed circuit board are enclosed by a potting compound to prevent water entering, and the connector of the control cable is protected against the ingress of water.