Abstract: An object of the present invention is to provide a construction machine that can use the return oil from a hydraulic actuator effectively.

Abstract: A locking unit for the parking lock of an automatic transmission, for locking the movement of a piston which is movable by a drive and which can be acted on with hydraulic pressure.

Abstract: A hydraulic tool can include a hydraulic cylinder, a piston within the hydraulic cylinder, and a rotary valve. The piston can be configured to move between a retracted position and an extended position. The piston can include a piston ram and a piston rod that define a ram side and a rod side inside the hydraulic cylinder. The rotary valve can be moved between a first position and a second position. The first position can be configured to direct flow at a first variable speed and a first variable force to the ram side of the hydraulic cylinder and the second position can be configured to direct flow at a second variable speed and a second variable force to the rod side of the hydraulic cylinder.

Abstract: A hybrid actuation device including a first plate and a second plate coupled to the first plate, a shape memory alloy wire coupled to the first plate and the second plate, a bladder positioned between the first plate and the second plate, the bladder housing a fluid, a first fixed electrode coupled to the second plate, and a flexible electrode coupled to the first plate and extending along the first fixed electrode.

Abstract: The present invention refers to a piston for an internal combustion engine, particularly a V-engine. The piston comprises an oil drainage groove provided in the outer circumferential surface of the piston between a ring belt and a piston skirt of the piston, the piston skirt being provided with two recessed pin boss portions on opposed sides of the piston, wherein the piston skirt is further provided with at least one oil drainage duct arranged between the two recessed pin boss portions at an outer surface of the piston skirt and configured to fluid-communicatively connect the oil drainage groove with the recessed pin boss portions.

Abstract: An engine system includes three communicating fluid vessels that each contain a fluid. A first interconnecting fluid conduit containing the fluid rotatably couples the second fluid vessel to the first fluid vessel and acts as a lever. A second interconnecting fluid conduit containing the fluid rotatably couples the third fluid vessel to the first fluid vessel and acts as another lever. By increasing the fluid column heights in the communicating fluid vessels, torque is applied to the levers to cause the second and third fluid vessels to revolve around the first fluid vessel.

Abstract: A hydraulic arrangement is disclosed for distributing a fluid in pressure coming from a source of fluid in pressure among hydraulic units of a work vehicle. The hydraulic arrangement includes a priority valve configured to divide the flow of the fluid source between a subset of the hydraulic units on the base of an equivalent load sensing signal derived from the hydraulic units. The hydraulic arrangement further includes by-pass means fluidly interposed between the source and the subset of the hydraulic units and configured to allow direct passage of fluid by-passing priority valve from the source to the subset of the hydraulic units according to a predefined condition.

Abstract: A hydraulic reservoir of a human-powered vehicle comprises a reservoir structure and a bleeding plug. The reservoir structure includes a reservoir chamber, a bleeding port, and a connecting port. The bleeding port is configured to be in communication with the reservoir chamber. The bleeding port has a bleeding-port inner diameter. The connecting port is configured to connect the reservoir chamber and a hydraulic chamber. The hydraulic chamber is at least partially defined by a piston. The reservoir structure includes an intermediate port through which a fluid is to flow from the connecting port to the bleeding port when bleeding the hydraulic reservoir. The intermediate port has an intermediate-port inner diameter smaller than the bleeding-port inner diameter. The bleeding plug is configured to be attached to the bleeding port.

Abstract: An operating device for a human-powered vehicle comprises a base, a piston, an operating member, an intermediate member, and a mounting structure. The base includes a hole. The piston is movably provided in the hole. The operating member is pivotally coupled to the base about a first pivot axis. The intermediate member is pivotally coupled to the base about a second pivot axis to transmit a pivotal movement of the operating member to the piston. The mounting structure is configured to couple the base and a handlebar of the human-powered vehicle. The mounting structure defines a mounting axis extending along the handlebar in a mounting state where the mounting structure couples the base and the handlebar. The first pivot axis is closer to the mounting axis than the second pivot axis in a perpendicular direction perpendicular to the mounting axis as viewed along the first pivot axis.

Abstract: A master cylinder for a brake. The master cylinder includes a cylinder main body having a hydraulic pressure chamber, a reservoir tank having a storage chamber, and a separator that is provided in the reservoir tank to divide a space in the storage chamber of the reservoir tank into an upper region and a lower region. A hydraulic fluid is storable in the hydraulic pressure chamber, and is storable in the storage chamber for thereby replenishing the hydraulic pressure chamber. The hydraulic fluid is circulatable between the upper region and the lower region, such that a liquid surface of the hydraulic fluid is in the upper region. The separator has a lower surface in the lower region. The lower surface has an inner portion, and an inclined portion that surrounds the inner portion and that is inclined outwardly and upwardly with respect to the inner portion.

Abstract: An artificial muscle includes a housing including an electrode region and an expandable liquid region and a dielectric liquid housed within the housing. The artificial muscle further includes an electrode pair positioned in the electrode region of the housing, the electrode pair comprising a first electrode and a second electrode, wherein the electrode pair is configured to actuate between a non-actuated state and an actuated state such that actuation from the non-actuated state to the actuated state directs the dielectric liquid into the expandable liquid region, expanding the expandable liquid region. The artificial muscle also includes a composite electrical insulating layered structure in contact with at least one of the first electrode or the second electrode, wherein the composite electrical insulating layered structure that includes an electrical insulator layer surrounded by adhesive surfaces. The adhesive surfaces are located between one or more flexible electrical insulators.

Abstract: It is an object of the present invention to provide a construction machine capable of efficiently driving a hydraulic cylinder by an accumulator. Thus, the construction machine includes a first control valve disposed in a first hydraulic fluid line connecting a bottom-side fluid chamber of a hydraulic cylinder with an accumulator, and a second control valve disposed in a second hydraulic fluid line connecting a rod-side fluid chamber of the hydraulic cylinder with a tank. The construction machine further includes a third control valve disposed in a third hydraulic fluid line connecting the rod-side fluid chamber with the accumulator, and a fourth control valve disposed in a fourth hydraulic fluid line connecting a line part of the first hydraulic fluid line, which connects the bottom-side fluid chamber with the third control valve, and a line part of the third hydraulic fluid line, which connects the rod-side fluid chamber with the third control valve, with each other.

Abstract: A diaphragm assembly includes a diaphragm defining a volume space; a diaphragm body extending from the diaphragm; a transition region from the diaphragm to the diaphragm body located on an outer side of the diaphragm and the diaphragm body facing away from the volume space; and a convex abutment contour arranged adjacent to the transition region. Related seat and pump assemblies are also disclosed.

Abstract: A hydraulic actuator includes a variable-delivery positive-displacement pump, a member able to continuously vary the delivery of the pump, the member being actuated by a ram supplied by a first directional-control valve commanded on the basis of an actuator movement instruction. The actuator comprises a second directional-control valve commanded on the basis of an output pressure of the pump, the second directional-control valve comprising two positions, one of them, known as the rest position, obtained as long as the output pressure of the pump is below a predetermined pressure and transmitting the output from the first directional-control valve to the double-acting ram and the other, referred to as the active position, transmitting the output pressure of the pump to the ram so as to reduce the output pressure of the pump without passing via the first directional-control valve.

Abstract: The invention relates to an actuator device comprising at least one solid-state actuator and a hydraulic unit connected mechanically to the solid-state actuator in series, wherein said hydraulic unit comprises a hydraulic volume which is filled with a hydraulic fluid. In the method of clamping a clamping body, an actuator device of this type is used and the solid-state actuator of the actuator device is controlled, in particular, depending on a movement variable of the clamping body.

Abstract: This disclosure describes techniques for a self-aligning system within a belt-driven linear actuator that enables a “keyless” or “round profile” piston to be sealed while maintaining an aligning and/or torque resisting ability. This enables the airspaces within the electromechanical actuator could be pressurized to perform a secondary load holding function that is redundant to the linear screw device.

Abstract: An actuator assembly for moving an implement attached to an agricultural vehicle. The actuator assembly includes an actuator comprising a longitudinal axis, a cylinder extending along the longitudinal axis, and a piston rod extending from the cylinder along the longitudinal axis and that is configured to be attached to the implement at a connection point. A safety stop is pivotably attached at the connection point and is movable between a deployed position where the safety stop is configured to block retraction of the actuator, and a retracted position where the safety stop is not configured to block retraction of the actuator. The safety stop is configured to rotate with respect to the actuator about a first rotational axis that is orthogonal to the longitudinal axis, as well as a second rotational axis that is orthogonal to both the longitudinal axis and the first rotational axis.

Abstract: The present disclosure relates to a friction member and a master cylinder including the same. The master cylinder includes a cylinder body with a bore formed therein, a piston configured to move forward and backward in the bore and protrude a portion thereof from the cylinder body, a housing configured to surround the protruding portion of the piston and having a through hole formed therein such that an input rod connected to a brake pedal to press the piston is inserted, a friction member provided between the housing and the piston to increase a frictional force with the piston when the piston moves forward and backward, and a pedal simulator connected to the piston to provide a repulsive force to the brake pedal.

Abstract: Proposed is an electronic brake device of a vehicle including: a cylinder unit; a screw shaft provided in the cylinder unit, and axis-rotated by a rotational force received from a motor; a nut unit coupled to the screw shaft with a ball member interposed therebetween, reciprocates in an axial direction of the screw shaft according to a rotating direction of the screw shaft, and provided with a flange part on one side end portion thereof; a piston unit coupled to the nut unit, and moves in conjunction with the nut unit; a sleeve unit provided inside the cylinder unit, and guides the piston unit to be inserted and move therethrough; and a guide member provided inside the cylinder unit, restricts rotation of the flange part so that rotation of the nut unit is restricted, and guides movement of the flange part.

Abstract: A work machine that can keep the control accuracy of actuators irrespective of temperature variation of a hydraulic operating fluid that passes through flow rate controllers that control the flow rates of supply to the actuators is provided. For this purpose, the flow rate controllers each have a valve body that is disposed on a main hydraulic line connecting a delivery line of a hydraulic pump and the actuator and that moves according to an operation pressure from a solenoid proportional pressure reducing valve, a sampling hydraulic line that branches from the main hydraulic line, and a temperature sensor set on the sampling hydraulic line. The controller is configured to correct a command electrical signal to the solenoid proportional pressure reducing valve according to a signal from the temperature sensor.