A self-locking actuator for moving a flight control surface of an aircraft and for self-locking in response to an external load applied to the actuator. The actuator includes a motor, a screw, and a drive gear that is rotatably driven by the motor to rotationally couple with the screw. A pawl support is coupled to and rotatable with the screw, and a swivel assembly is coupled to the pawl support for rotational movement with the screw and pivoting movement relative to the screw. The swivel assembly engages a cage that is fixed relative to the rotating screw, drive gear, and swivel assembly. Pivoting of the swivel assembly about a pivot axis engages the swivel assembly with the cage to positively lock with the cage and to prevent rotation of the screw in each of first and second opposite rotational directions of the screw about a rotational axis of the screw.

An assembly for a smelting process including a lifting actuator for adjusting a height of an anode with respect to a smelting pot is provided. The lifting actuator includes a body supported adjacent to the smelting pot. A motor is connected to a drive screw located in the body and the motor rotates the drive screw. A floating nut is connected to the drive screw, and a carriage plate rests on the floating nut. At least one linear bearing rail is supported on the body and guides the carriage plate. The anode is mounted on the carriage plate such that the motor drives the floating nut axially within the body to adjust a height of the anode with respect to the smelting pot.

The invention relates to an actuator device (8) for moving a movable cowl of a thrust reverser, including: an actuator (12) including a screw (14) and a nut (15) capable of engaging with the screw (14) such that a rotation of the screw relative to the nut translates the nut relative to the screw; a locking device (30) including a locking part (31, 57) which is movable relative to the screw (14) between a locked position in which the locking part (31, 57) prevents the rotation of the screw (14) and an unlocked position in which the locking part (31, 57) allows the rotation of the screw (14), in which the screw (14) includes a body (17) and a lock-inhibiting device (38), the lock-inhibiting device (38) including an inhibiting part (47, 48) which is movable relative to the body (17) between a first position in which the part (47, 48) allows the locking part (31, 47) to move between the locked position and the unlocked position, and a second position in which the inhibiting part (47, 48) prevents the locking part (31, 57) from moving into the locked position.

A device includes an outer cylinder having a cylinder inner wall and a cylinder outer wall and at least one magnet disposed on or between the cylinder inner wall and the cylinder outer wall and a piston having a piston inner wall and a piston outer wall and at least one magnet disposed on or between the piston outer wall and the piston inner wall. In one embodiment, the piston is rotatable within the cylinder and slidably movable along an axis respective to the cylinder. The piston is also disposed within the cylinder such that the at least one magnet disposed on or between the cylinder inner wall and the cylinder outer wall is aligned with the at least one magnet disposed on or between the piston outer wall and the piston inner wall, substantially preventing the piston from rotating relative to the cylinder.

A method of controlling the flow of a fluid in a pipe system includes controlling a valve in the pipe system, the valve including a valve body having an inlet, an outlet, and a body cavity, a gate moveable over a portion of the valve body at least partially between the inlet and the outlet, the gate including a cam stop, and a drive assembly, the drive assembly including a pair of drive lines, a first drive line of the pair of drive lines including a sync cam, the sync cam of the first drive line movably positioned on the drive shaft of the first drive line and positioned relative to the cam stop, moving the sync cam in a first direction to a front stop position; and moving the gate in the first direction to allow fluid to flow from the inlet to the outlet.

A method of controlling the flow of a fluid in a pipe system includes controlling a valve in the pipe system, the valve including a valve body having an inlet, an outlet, and a body cavity, a gate moveable over a portion of the valve body at least partially between the inlet and the outlet, the gate including a cam stop, and a drive assembly, the drive assembly including a pair of drive lines, a first drive line of the pair of drive lines including a sync cam, the sync cam of the first drive line movably positioned on the drive shaft of the first drive line and positioned relative to the cam stop, moving the sync cam in a first direction to a front stop position; and moving the gate in the first direction to allow fluid to flow from the inlet to the outlet.

A method for designing a spline surface contour of a roller-type wave-motion includes of the steps of slicing radial movement track of a roller between a cam and a spline aperture and circumference rotation track at equal proportion at equal time intervals to sequentially obtain circle centers and points of tangency of the track circles during movement of the roller; connecting the points of tangency to form a unit cam circumference segment of a cam periphery in order to draw and form a single-sided tooth flank contour; and forming a correspondent side tooth flank contour by mirroring and projecting the single-sided tooth flank contour. A method of forming a spline wheel contour and a method of forming a cam periphery are obtained.

An adjustable stroke device for a random orbital machine has a housing with a central axis and a wall defining a cavity. At least one counterweight is movably disposed at least partially within the cavity. A mounting assembly is disposed at least partially within the cavity. The mounting assembly has a workpiece attachment mechanism. A stroke adjuster couples the at least one counterweight with the mounting assembly. The stroke adjuster enables the at least one counterweight and mounting assembly to move with respect to one another such that a distance between the at least one counterweight and the mounting assembly may be variably adjusted which, in turn, variably adjust a stroke radius of the workpiece attachment mechanism with respect to the central axis of the housing. The stroke adjuster has an adjuster ring and a cam mechanism secured with the adjuster ring.

An actuator assembly comprises a ball screw drive having a ball screw spindle rotatably mounted about a spindle axis, on which a spindle nut is received, and a thread track on an outer circumferential surface of the ball screw spindle, has a portion of a ball return on a circumferential wall of the ball screw spindle, which return connects a beginning and an end of the thread track to one another. At the beginning and at the end of the thread track, an insert is inserted in which a ball race is formed, which is part of the ball return. The inserts are arranged such that each end of a ball race adjoins a portion of the ball return and another end adjoins a beginning of a thread track or an end of the thread track. In a section perpendicular to a spindle axis, an angle of the ball race to a tangent to the thread track at an adjacent beginning or end of the thread track is greater than 90 in a central portion between the first and the second end of the ball race. To determine the angle, a side of the tangent on which a portion of the thread track directly adjacent to the beginning or the end lies is selected. To produce the ball screw spindle, a channel of the ball return is introduced into the circumferential wall, a thread is introduced into an outer circumferential surface of the ball screw spindle, and in each case one depression is introduced into the outer circumferential surface at the beginning and at the end of the thread track, and inserts are inserted into the depressions.

A ball screw drive having a threaded spindle and a spindle nut enclosing the spindle coaxially. At least two radially outwardly open channels are oriented axially in parallel and are simultaneously pressed into the lateral surface, the channels open toward a common front face of the spindle nut. Balls circulate in a helical ball race in the space between the spindle and the nut. A ball return guide has two ball deflectors and a transfer channel running therebetween. A drive element is operatively connected coaxially to the spindle nut and applies a torque onto the spindle nut. The operative connection between the drive element and the spindle nut is formed by a contact surface with a connecting contour and a catch element (designed such that in the assembled state it engages in one of the channels. The ball screw drive can be used as an actuating element.