A hydraulic actuator system includes a hydraulic actuator having a housing with a piston having a piston shaft arranged within the housing. The housing is formed to have first, second and third regions, wherein the first region is between the second and third regions and has a larger major dimension than the second and third regions. The system also includes first, second, and third piston heads connected to the piston shaft with the first piston head being tween the second and third piston, wherein the first position head is within the first region and divides the first region into two volumes, the second piston head is in the second region and defines a first volume and the third piston head is in the third region and defines a fourth volume. The system also includes a mode selection device operably connected to the first, second, third and fourth volume.

A device that performs wireless actuation by inductive heating. The device includes a bladder configured to expand or retract, so as to change the bladder's interior area. The device also includes a container, fluidly coupled to the bladder via a connector, that houses a magnetic rod suspended in a fluid medium. The magnetic rod is configured to react to a magnetic field that produces a phase transition of the fluid medium, causing the fluid medium to be transferred to the bladder's interior area, via the connector, expanding the bladder. The device further includes an induction coil, disposed around the container, and the induction coil's first end is coupled to the container's interior. The device also includes an induction heater, coupled to the induction coil's second end, that powers the induction coil, such that the induction coil generates the magnetic field within the container.

A device that performs wireless actuation by inductive heating. The device includes a bladder configured to expand or retract, so as to change the bladder's interior area. The device also includes a container, fluidly coupled to the bladder via a connector, that houses a magnetic rod suspended in a fluid medium. The magnetic rod is configured to react to a magnetic field that produces a phase transition of the fluid medium, causing the fluid medium to be transferred to the bladder's interior area, via the connector, expanding the bladder. The device further includes an induction coil, disposed around the container, and the induction coil's first end is coupled to the container's interior. The device also includes an induction heater, coupled to the induction coil's second end, that powers the induction coil, such that the induction coil generates the magnetic field within the container.

An actuating system for pivoting a wing tip section (13) about a fixed wing base section (11), and including a heating arrangement (33) positioned and adapted to be operable to heat at least one portion of an actuating arrangement (23) that pivots the wing tip section such that at least for ambient temperatures below a predetermined temperature the required work to be effected by the actuator (25) when moving the second coupling part (31) between the first position and the second position is lower than without heating the at least one portion.

An actuating system for pivoting a wing tip section (13) about a fixed wing base section (11), and including a heating arrangement (33) positioned and adapted to be operable to heat at least one portion of an actuating arrangement (23) that pivots the wing tip section such that at least for ambient temperatures below a predetermined temperature the required work to be effected by the actuator (25) when moving the second coupling part (31) between the first position and the second position is lower than without heating the at least one portion.

A hydraulic system includes a first output fluid tube connecting between a hydraulic pump to output operation fluid and a first operation valve to change a first pilot pressure of the operation fluid, a second output fluid tube connected between the hydraulic pump and a second operation valve to change a second pilot pressure of the operation fluid, a switching valve provided in the second output fluid tube, and a warm-up fluid tube connected between the first operation valve and the switching valve, wherein the switching valve is switched between a first position allowing the operation fluid to be drained through the first output fluid tube, the first operation valve, the warm-up fluid tube and the switching valve, and a second position allowing the operation fluid to be supplied through second output fluid tube to the second operation valve.

A hydraulic system includes a first output fluid tube connecting between a hydraulic pump to output operation fluid and a first operation valve to change a first pilot pressure of the operation fluid, a second output fluid tube connected between the hydraulic pump and a second operation valve to change a second pilot pressure of the operation fluid, a switching valve provided in the second output fluid tube, and a warm-up fluid tube connected between the first operation valve and the switching valve, wherein the switching valve is switched between a first position allowing the operation fluid to be drained through the first output fluid tube, the first operation valve, the warm-up fluid tube and the switching valve, and a second position allowing the operation fluid to be supplied through second output fluid tube to the second operation valve.

Electro-hydraulic servo-valves and related methods are disclosed herein. An example electro-hydraulic servo-valve includes an inlet to receive a fluid from a reservoir, a torque motor, a chamber, the fluid to return to the reservoir via the chamber, and a flexure tube coupled to the torque motor. At least a portion of the flexure tube is disposed in the chamber. The flexure tube includes a nozzle to deliver the fluid to an actuator. The example electro-hydraulic servo-valve includes a damper operatively coupled to the flexure tube. The damper is disposed in the chamber.

A fluid heating device includes a pressurizing chamber configured to store a working fluid and a heat accumulator disposed in the pressurizing chamber. The heat accumulator includes a heat accumulating member configured to release heat by receiving a pressure applied to the working fluid. The fluid heating device has improved actuation efficiency.

This invention relates to a versatile rotary vane actuator module and a thermal actuation system with universal adaptable shafts/installation and differential rotary and turbocharger mechanisms to actuate 0-360 degree or more for complicated, precision, extreme rotary applications like robotic excavators, airplanes, heavy or weapon machinery, satellite receivers or wind turbine position controls, remote pipeline valves, HIPP or subsea valves and BOP controls, the thermal actuation system includes three thermal elements (1) pressure sources (2) volume vessel (3) heat sources, the vane actuator comes with redundant edge seals and corner seal rings to minimize or eliminate the inherent leakage and the differential rotation mechanism and the turbocharger with a dynamic porting system to expand the rotation 360 degree more efficiently, the actuator module includes a least one housing assembly, at least one driver assembly and at least one dynamic embedded porting system.