A fluid power actuator includes a fluid power actuator housing, a piston assembly, and a screw assembly. The piston assembly is constructed and arranged to move relative to the fluid power actuator housing in response to changes in fluid pressure within the fluid power actuator housing. The screw assembly couples with the fluid power actuator housing and the piston assembly. The screw assembly is constructed and arranged to control movement of the piston assembly relative to the fluid power actuator housing. Such a fluid power actuator is well-suited for various applications such as in loading equipment which is involved in high precision munitions loading, among others.

A pitch lock system including an outer member having a centerline axis, an inner member located radially inward of the outer member with respect to the centerline axis, and a plurality of clutch elements located between the outer member and the inner member. The pitch lock system has a disengaged position and an engaged position. In the engaged position, the plurality of clutch elements are constrained between the inner member and the outer member such that relative axial direction of the plurality of clutch elements is permitted in only one direction. An engine includes a pitch actuator and the pitch lock system.

The present invention provides a fluidic clamping device (100) comprising a sleeve (110) for clamping and holding a movable part (200). The sleeve (110) comprises a central element (111) having a cross-section in a longitudinal direction of the central element (111), comprising a cavity configured to receive the movable part (200). The fluidic clamping device (100) is characterized in that the sleeve (110) further comprises at least one chamber (112) disposed on an outer periphery of the central element (111) and extending along a longitudinal direction of the central element (111), the at least one chamber (112) configured to containing a fluid, wherein the fluidic clamping device (100) is configured to pressurize an interior of the at least one chamber (112) with a first predetermined fluidic pressure or a second predetermined fluidic pressure, wherein the first predetermined fluidic pressure is lower than the second predetermined fluidic pressure, and wherein the central element (111) is configured to be in frictional contact with the movable part (200) at at least a portion of an inner periphery of the central element (111) and to clamp and hold the movable part (200) in a first state in which the interior of the at least one chamber (112) is pressurized with the first fluidic pressure, and wherein the central element (111) is configured not to be in frictional contact with the movable part (200) at any portion of the inner periphery of the central element (111) in a second state in which the interior of the at least one chamber (112) is pressurized with the second fluidic pressure.

A linear actuating device comprising a main actuator provided with a main body and with a main rod able to move with at least one degree of freedom in translation with respect to the main body. According to the disclosure, the linear actuating device comprises an emergency system configured, in a nominal operating mode of the linear actuating device, to allow the main rod to move with respect to the main body and, in an emergency operating mode of the linear actuating device, to return and then maintain the main rod in a predetermined refuge position.

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.