Abstract: An actuator comprising a body in which a rod is mounted to slide, the actuator including a screw extending inside the rod to co-operate with a nut secured to the rod, the screw being driven in rotation by a motor. The rod is associated with a piston that slides in a cavity of the body so as to define two chambers therein, the chambers being filled with hydraulic fluid and being put into communication via fluid transfer means fitted with at least one regulator member adapted to throttle the fluid expelled from one of the chambers, in at least one travel direction of the rod.

Abstract: Actuator assembly includes a housing assembly, a ball screw, a ball nut, and a lock. The ball screw is rotationally mounted on and extends from the housing assembly, is coupled to receive an actuator drive torque, and is configured, upon receipt thereof, to rotate. The ball nut is rotationally supported on the ball screw and is configured, in response to rotation of the ball screw, to translate thereon between a stowed position and a deployed position. The lock is disposed at least partially within the housing assembly and is configured to move between a lock position and an unlock position. The lock prevents the ball nut from translating out of the stowed position when the lock is in the lock position and the ball nut is in the stowed position.

Abstract: A suspension actuator (1) for positioning a movably mounted component of a motor vehicle suspension, including a first actuator component (4), which is to be connected to the movably mounted component, and a second actuator component (3), which is to be connected to a fixed suspension component, wherein both actuator components can be axially adjusted relative to one another via a ball-type linear drive (5), which includes a threaded spindle (6) and a nut (7) running thereon. Either the nut can be driven via a drive motor (10) for the axial adjustment of the threaded spindle or the spindle can be driven via a drive motor for axial adjustment of the nut.

Abstract: An electromechanical actuator incorporates a drive housing connected to a motor for rotational motion. A screw is employed with an actuating nut having protruding engagement bosses and a drive coupling is concentrically received within the drive housing having segments equal to the number of engagement bosses. Each segment has a cavity to receive a respective one of the engagement bosses and the segments are cooperatively positionable from an active position radially compressed to engage the bosses within the cavities to a released position radially expanded to disengage the bosses from the cavities.

Abstract: In an electric actuator, a connector is coupled to one end of a screw shaft that makes up a displacement mechanism, the screw shaft being rotatably supported by first and second bearings. Further, on the other end of the screw shaft, a support ring is disposed through a holder, wherein the support ring is slidable along an inner circumferential surface of a piston rod. On the outer circumferential surface of a piston, a rotation-stopping member is provided, which includes projections thereon that project in a radial direction from the outer circumferential surface, the projections being inserted into grooves of said body.

Abstract: An integrated thrust reverser and variable area fan nozzle actuator includes a ballscrew shaft having a first ballnut and a second ballnut. The second ballnut is fastened to a first translatable object. A bearing is affixed to the ballscrew shaft between the first ballnut and the second ballnut. A second translatable object is coupled to the bearing. A drive mechanism is operably coupled to the first ballnut for rotation and a locking mechanism selectively couples the ballscrew shaft to the first ballnut.

Abstract: A disk brake system includes a disk, brake pads, and a linear motion actuator including an electric motor, a rotary shaft coupled to the motor through a reduction gear mechanism, planetary rollers formed with helical grooves in their outer surfaces, and an outer ring member having a helical rib engages in the helical grooves. The outer ring is coupled to one of the brake pads. When the rotary shaft is rotated by the motor, the outer ring member is moved axially through the planetary rollers, and the brake pads are pressed against the disk. The linear motion actuator further includes a locking mechanism including engaging holes formed in an intermediate gear of the reduction gear mechanism at equal intervals, a locking pin, and a linear solenoid for moving the locking pin until the pin engages in one of the engaging holes, thus locking the motor.

Abstract: An electrically driven linear actuator has an actuator body with a ball screw to convert a rotational motion to a linear motion. An electric motor provides the rotational motion. A gear mechanism transmits rotational motion of the electric motor to the ball screw of the actuator body. A position holding mechanism holds the position of the ball screw of the actuator body by engaging teeth, specifically a space between adjacent teeth, of a gear forming the gear mechanism.

Abstract: An electric actuator includes a first port, a second port, and a cylinder chamber connecting passage. The first port is formed on an inner face of a rod-side cylinder chamber of a cylinder body. The second port is formed on an inner face of a head-side cylinder chamber of the cylinder body. The cylinder chamber connecting passage connects the first port and the second port. In the electric actuator, a piston part of a piston rod closes the first port 6 when the piston rod advances.

Abstract: An automatically locking actuator includes a first end connector, a rotatable drive screw operably coupled to the first end connector, a nut assembly threadably mounted on the drive screw, a second end connector operably coupled to the nut assembly and a rotary lock having a rotor and where the actuator moves between extended and retracted positions in response to rotation of the rotor.

Abstract: A spindle drive for a movable component includes a threaded spindle, which can be driven in rotation about a rotational axis by a reversible drive. A spindle nut is mounted nonrotatably on the spindle. By means of the spindle nut, a transmission element connected to the movable component can be driven axially with respect to the spindle axis. The spindle nut can be connected to and disconnected from the transmission element by a connecting device. A nut position sensor detects the position of the spindle nut and a component sensor detects the axial position of the transmission element. If it is concluded that there is plausibility between the signals of the nut position sensor and the component sensor, the spindle nut can be connected to the transmission element by the connecting device.

Abstract: A safety release mechanism for a linear actuator having a lead screw and a telescopic tube includes a nut, a protection shroud, a sleeve connected to the telescopic tube, a clutching element and a spiral spring. The nut is threadedly and drivingly connected to the lead screw. The protection shroud is fixedly and drivingly connected to one side of the nut. One end of the sleeve is sheathed on the protection shroud while the other end thereof is fixedly connected to the telescopic tube. The outer periphery of the sleeve is formed with notches. The clutching element is sheathed on the sleeve and formed with protrusions configured to be selectively inserted into or removed from the notches. The spiral spring is sheathed on the protection shroud and the clutching element. With this arrangement, cleavage or damage of components can be prevented to thereby increase the safety of operation.

Abstract: A gear mechanism arrangement includes an axial bearing apparatus and a shaft mounted rotatably in the axial bearing apparatus. The shaft is fixedly coupled to a first mechanical coupling point and a second mechanical coupling point, the first mechanical coupling point configured to engage a gear stage and the second mechanical configured to engage a movement converter. The movement converter is configured to convert between a rotational movement and a longitudinal movement of the gear mechanism arrangement. The axial bearing apparatus is configured to transmit a force which acts axially on the shaft to a stationary part of the gear mechanism apparatus arrangement. The axial bearing apparatus is further configured such that active bearing friction is dependent on a rotational direction of the rotational movement and differs for each of first and second rotational directions of the rotational movement.

Abstract: A direct acting force limiting actuator wherein the actuator output force either directly or indirectly causes significant drag on a rotary input shaft rather than on the translating output member. Consequently, input energy is dissipated before the actuator gear train mechanical advantage amplifies the reaction forces.

Abstract: An actuator assembly configured to control the movement of a stabilizer includes a ball screw having a longitudinal axis and configured to be rotated by a drive assembly, a primary nut assembly coupled to the stabilizer and received on the ball screw such that rotation of the ball screw causes movement of the primary nut assembly along the longitudinal axis of the ball screw, the ball screw and primary nut defining a primary load path between the between the drive means and the stabilizer, and a secondary nut assembly coupled to the primary nut assembly and configured to engage the ball screw upon failure of the primary load path.

Abstract: A powerless helical locking mechanism for a door includes a screw with a variable lead angle connected with a power source, and a self-adaptive nut connected to the door. The helical slot of the screw is divided into a working segment with the helical lead angle greater than the friction angle, a closing segment with the helical lead angle smaller than the friction angle, and a transition segment between the closing and working segments. The power source actuates the screw to rotate bidirectionally.

Abstract: An electromotive linear drive with a drive unit having a drive motor and a spindle driven by the drive unit. The drive includes a spindle nut disposed on the spindle. The spindle nut is movable longitudinally on the spindle. A lifting tube is operatively connected to the spindle nut so that the spindle nut moves together with the lifting tube. A connecting part is disposed on a free end of the lifting tube. A braking assembly is disposed in the lifting tube and is operatively connected to the spindle nut via an adjustable, frictional connection. The braking assembly is manipulable. During operation of the drive motor, the spindle nut frictionally engages the braking assembly, preventing rotation of the spindle nut. The frictional connection may be adjusted to permit the spindle nut to rotate with respect to the spindle, thereby manipulating a linear speed component of the lifting tube.

Abstract: An actuator comprises an actuator shaft mounted for rotation by a drive shaft, releasable lock means operable to restrict axial movement of the actuator shaft relative to the drive shaft, and an output member co-operating with the actuator shaft such that rotation of the actuator shaft drives the output member for translating movement relative to the actuator shaft.

Abstract: A subsea electric actuator comprises an electric motor and a telescopic drive connection (8) from the motor to a drive unit (10, 11, 12) which can be moved to and fro and converts rotary motion of the connection to linear motion of an actuating stem (5). A return spring (14) is operable on the drive unit to urge the actuating stem towards a datum state. An electromagnetic latch (15) is operative when set to maintain the drive unit in a predetermined position so as to decouple the action of the return spring whereby the stem can be advanced and retracted relative to the drive unit free from the action of the return spring. De-energisation of the latch allows the return spring to operate on the drive unit to return the actuating stem to the datum state. Various forms of electromagnetic latch are described.

Abstract: An actuator (100) includes a differential (105), the differential comprising a gear train comprising a first leg (106a) and a second leg (106b); a motor (101) configured to power a rotating ball screw (104) through the first leg (106a) of the differential (105); and a brake (103) connected to the second leg (106b) of the differential (105), the brake (103) having a holding force, such that in the event a torque in the differential (105) exceeds the holding force, the brake (103) is configured to dissipate the torque in the differential (105).

Abstract: An emergency lowering (retraction) mechanism for a linear actuator includes first and second cylindrical parts, an operating handle outside of the first cylindrical part, and a coil spring which has a first end connected to the operating handle, a second end connected to the second cylindrical part, and a plurality of windings, with some of the windings wrapping around and contacting the outer periphery of the first cylindrical part and some wrapping around and contacting the outer periphery of the second cylindrical part.

Abstract: An electromechanical actuating assembly can have a redundant design with a first electric motor providing actuator-moving power via a first drive train and a second electric motor providing actuator-moving power via a second drive train. A first decoupling train can transmit decoupling power to decouple the first drive train from the actuator and a second decoupling train for transmit decoupling power to decouple the second drive train from the actuator. The assembly is operable in a fault-tolerant mode wherein actuator-moving power is transferred only through one drive train and the other drive train is decoupled from the actuator.

Abstract: An actuator includes a base, a motor mounted on the base for driving a worm to rotate a worm gear of a transmission gear set that is set in an accommodation chamber inside the base and has a gear shaft pivotally inserted through the worm gear and fixedly mounted with an output gear, a brake module rotatable with said worm gear, a linking rod assembly having a driven gear meshed with the output gear, a screw rod rotatable with the driven gear, a movable member threaded onto the screw rod and an extension rod connected to the movable block and movable in and out of a sleeved outside the base upon rotation of the screw rod for biasing a crane beam of a lifting device.

Abstract: An actuator comprising a reversible electric motor, which over a gearing, drives an activation element which can move back and forth. The activation element is of the non-self-locking type. Furthermore the motor and gearing are of a non self locking type. A brake holds the activation element in any position, when the electric motor is inactive, said brake can be released by means of a release mechanism. The motor is used as generator when the brake is released and the generator voltage from it is used to adjust the velocity of the activation element. Thus, a quick release is provided, where the activation element can be disengaged and adjusted evading gear and motor, and where the movement of the activation element, during the disengagement, occurs with a controlled velocity.

Abstract: An actuator comprises a screw shaft, a nut translatable along the shaft between a retracted position and an extended position, a tine component carried by the nut, the tine component including tine fingers formed with projections each being engageable with a formation provided on a housing when the nut occupies its extended position to secure the nut against axial movement, and a lock member engageable with the tine fingers to restrict radial movement of the tine fingers.

Abstract: Actuator of the type where a driving rod (11) is extended by a nut (10) on a driven spindle. A manually operated emergency lowering device (14) for the driving rod (11) is mounted between the driving rod (11) and a mounting bracket (16) at the end thereof. The emergency lowering device (14) comprises a first cylindrical part (15) connected with the mounting bracket (16) and a second cylindrical part (17) connected with the driving rod (11). The two cylindrical parts are coupled together by a screw spring (21). The spring is released by an operating grip (19) constructed as a bushing in which the one end (22) of the spring (21) is secured. The other end (23) of the spring (21) is secured in the cylindrical part (17) connected with the driving rod (11). Rotation of the bushing causes the spring (21) to be released, whereby the driving rod (11) may be screwed back by the manually applied torque.

Abstract: A feed apparatus has a ball screw, a nut, a drive motor, a braking mechanism and a controller and moves a movable body vertically. When recognizing a movement command for rapid traverse relating to the movable body, the controller, when the movable body is to be moved upward, moves the movable body past a target position according to the movement command and then reverses the moving direction thereof and moves the movable body to the target position and stops it there, and, when the movable body is to be moved downward, moves the movable body directly to the target position and stops it there. After moving the movable body to the target position and stopping it there, the controller causes the drive motor to keep the position of the movable body at the stop position and causes the braking mechanism to brake the movement of the movable body.

Abstract: A linear actuator with a quick-release mechanism allows the unpowered, loaded linear actuator to immediately return to its initial position by operating a rotatable involute cam of the quick-release mechanism. The quick-release mechanism is connected with a remote monitoring system so the current position of the linear actuator can be detected from a distant place.

Abstract: A mechanical linear actuator having a tubular member that is defined by a housing for rotatably and axially supporting a circular nut, a lead screw is mated to the circular nut so that it can move axially in and out of the tubular member. A torsion spring clutch brake is wound about the circular nut to normally brake the nut and thus prevent the lead screw from moving into or out of the tubular member. An unlocking mechanism can remotely unwind the torsion spring clutch brake to sufficiently release the circular nut and thus allow the lead screw to pass in and out of the tubular member. An adjustable stop is provided for adjusting the stroke of the actuator.

Abstract: A linear actuator includes a first structure having an axis. A second structure is configured to translate relative to the first structure in response to rotation of the first structure. First and second stops are respectively operatively connected to the first and second structures. The first and second stops are configured to engage with one another at a travel limiting position. A compliant member is operatively arranged between the first and second structures and is configured to absorb energy between the first and second structures in the travel limiting position.

Abstract: A transmission mechanism having a deceleration function includes a guide screw, a worm wheel set, an intermediary ring, an isolator and a passive sleeve. The worm wheel set is fitted onto the guide screw and includes worm wheel and plural claw arms. A spacing slot is formed between any two adjacent claw arms. The intermediary ring is fitted onto a peripheral edge of each claw arm. The isolator surrounds a peripheral edge of the intermediary ring with one side fixed to an actuator. With plural grooves arranged on a peripheral edge thereof, the passive sleeve is fitted onto the guide screw. An accommodation space is formed among the groove, spacing slot and intermediary ring. Each needle roller is accommodated in the accommodation space and inter-contacted with the claw arm, the intermediary ring and the passive sleeve.

Abstract: The invention refers to coupling mechanism and a linear actuator incorporating such a mechanism for releasably interconnecting first and second mechanical members (1, 2), longitudinally movable relative to each other, a first one of said mechanical members (1) pivotably supporting an end (F) of a first link of a knee link mechanism (3), also incorporating a second link member (3b), which first and second link members are pivotally connected to another in a knee joint (E), a control rod (4) pivotally connected to said knee joint (E), the end (D) of the second link member (3b) remote from the knee joint (E) being connected to a hook arm (5), the opposite end of which is pivotally supported at a support point (B) stationary positioned relative to said first mechanical member (1), said hook arm (5) having a hook (5a) facing said second mechanical member and being in mechanical engagement (A) with a shoulder (6, 6?) on said second mechanical member (2) as long as the said knee joint (E) is kept in a substantially

Abstract: A modular support (7) with holes (10) for attachment screws is equipped with a through seat (7A) with axial stop (7B) for a nut (9) capable of being received and engaged in said through seat; the modular support (7) can be utilized simply by preparing—on the load bearing structure—the threaded holes for the screws and a trace for a transverse spline, partly received in another trace (16) in the support (7).

Abstract: The invention relates to a gearing mechanism (1) that serves particularly as a worm gear for assemblies for outside force activated adjustment of elements of a motor vehicle, comprising a housing component (9) and a shaft (2) mounted in the housing component (9). The shaft (2) is driven rotating relative to the housing component (9) with regard to a rotation axis (8) in a first rotation direction (11) and in a second rotation direction (12) opposite the first rotation direction (11). There is also a wrap element (15) that wraps the shaft (2) multiple times. The wrap element (15) is designed as a spring-elastic wrap element (15). A first end (19) of the wrap element (15) is fastened in a stationary manner to the housing component (9). This can achieve a self-locking of the shaft (2) dependent on the rotation direction.

Abstract: A novel apparatus and method of controlling sails and their related mechanical forces on sailing systems through the utilization of threaded elements/forms. This device is easily scaled to the requirements of the particular sailing system being controlled. It has four basic elements providing control. The first is a rotatable lead screw having a lead angle of 5° or less. A matching internally threaded element, which travels in a linearly upon the lead screw when same is rotated. The lead screw may have non-threaded smooth sections on each end, which provide an area for rotary bearing supports. Rotation of the lead screw is provided for upon either or both ends. The lead screw may be of any form or design provided it has a lead angle of 5° or less. This feature eliminates the need for brakes or other holding devices to sustain loads after they have been positioned.

Abstract: In a method for utilizing a wedge engagement mechanism as means for retaining an output shaft without requiring a large driving power, there is a need for preventing fatigue life of an actuator from being reduced as a result of stress at contacting portions of parts of wedge engagement portions of the wedge engagement mechanism becoming large. In a linear actuator that converts rotary motion of a drive unit for rotation to linear motion through a rotary motion-to-linear motion conversion mechanism, a one-way mechanism is disposed upstream of the rotary motion-to-linear motion conversion mechanism in a rotational drive path, to thereby inhibit, with a small wedge engagement force, the output shaft from being driven by an external force, achieving reduction in the stress at the contacting portions.

Abstract: An actuator is described which comprises a rotatable actuator member (14, 114) and a lock arrangement (28, 128) operable to lock the actuator member (14, 144) against rotation, the lock arrangement (28, 128) comprising an axially movable lock member (30, 130, 230a, 230b), the lock member being movable between a locked position in which it co-operates with a stop (34, 136) to resist rotation of the actuator member, and a released position, and an actuation device (62, 162) operable to move the lock member towards its released position.

Abstract: Vehicles commonly include control-surfaces and other components that are selectively moved during operation among a plurality of positions. Movement of aircraft control-surface components is crucial in flight, and an actuating assembly must consistently and dependably perform during normal operation and be prepared to survive situations outside normal operation and/or to compensate for circumstances causing loss of actuator control. Jam tolerant electromechanically operated actuation systems, of both the rotary and linear types, together with their methods of operation are described herein. Specifically, electrical jam-detection and control systems and associated locking and damping devices can be electrically and mechanically engaged and disengaged, are automatically reversible, and are testable.

Abstract: A power drive assembly for a rear lift gate assembly of a vehicle includes a screw drive having a screw member and a clutch supported by the screw member.

Abstract: An actuator device (1) comprising an actuator housing (2), a driving motor (4) attached to the actuator housing (2), which driving motor (4) is provided with a motor spindle (28), the motor spindle (28) being displaceably engaged with an actuator spindle (6) via a nut (38), and where an auxiliary frame (8) which can be displaced relative to the actuator spindle (6) and biased by use of the driving motor (4), and which can be releasably coupled to the actuator housing (2), is arranged to displace the actuator spindle (6) independently of the motor (4), and where the nut (38) is releasable coupled to the actuator spindle (6), thereby being arranged to bias the auxiliary frame (8) while disengaged from the actuator spindle (6).

Abstract: A nut for a lead screw assembly, a lead screw assembly and a method for preventing backlash in a lead screw assembly are provided. The nut of the lead screw assembly includes a one-way clutch that permits relative motion of between two nut bodies in a first direction but prevents relative motion in an opposite direction. The one-way clutch preferably includes at least one sprag element that acts between the two nut bodies to permit or prevent relative motion between the two nut bodies of the nut. The lead screw assembly generally incorporates a nut incorporating such a nut. The method generally includes binding the first nut body relative the second nut body to prevent relative motion of the nut bodies in one direction while permitting relative motion in an opposite direction.

Abstract: An actuator arrangement comprises a plurality of linearly extendable actuators arranged to be driven by a common electrically driven motor, each actuator, being provided with limit stops to limit extension and/or retraction thereof, wherein the limit stops of the actuators are positioned such that a first one of the actuators has a smaller range of permitted extension than at least a second one of the actuators.

Abstract: An actuator with self-locking assist device comprises an actuator and a self-locking assist device, wherein the self-locking assist device is disposed at one end of the actuator, and the friction force between the self-locking assist device and the actuator is used to improve the self-locking capability of the actuator, thus preventing the uncontrollable movement of the actuator caused by the influence of the load carried.

Abstract: According to the present invention mechanical system for tilting cab of a vehicle, the rotational motion of the detachable handle (12) is transmitted to the worm shaft (14) through the engaging clip (15). The worm shaft (14) rotates the worm (11) which in turn rotates the nut (10). The nut (10) being restrained for translational motion, pushes the screw (9) upward. The screw (9) gets a translational motion and is raised. The clevis joint (8) on the top of the screw (9) forces the link arm (7) upwards. The link arm (7) also rotates about the clevis joint (8) due to the revolute joint. The link arm (7) transmits this motion through the bush (13) and the bush bracket (6) to the suspension bracket (3) of the cab (1). As a result the cab (1) tilts about its transverse axis (5).

Abstract: A stop device comprises a rotatable shaft, a travelling nut mounted upon the shaft in such a manner that rotation of the shaft causes the nut to translate along the shaft, and a stop member mounted upon the shaft and operable to limit the length of the shaft along which the travelling nut can translate, wherein the stop member is adjustably mounted upon the shaft.

Abstract: The invention relates to an actuator comprising a body in which a rod is mounted to slide, the actuator including a screw extending inside the rod to co-operate with a nut secured to the rod, the screw being driven in rotation by a motor. According to the invention, the rod is associated with a piston that slides in a cavity of the body so as to define two chambers therein, the chambers being filled with hydraulic fluid and being put into communication via fluid transfer means fitted with at least one regulator member adapted to throttle the fluid expelled from one of the chambers, in at least one travel direction of the rod.

Abstract: A linear actuator comprising a spindle (5) with a spindle nut (6), where the spindle (5) is driven by an electric motor (2) via a transmission (3,4), comprising a planetary gear (4). The construction is constructed in such a way that the spindle (5) is lead through the transmission (3,4) and is embedded by means of a ball bearing (20) in connection with a rear mounting (10), causing the axial forces to be lead through the transmission (3,4) via the spindle (5) and the ball bearing (20) to the rear mounting (10). This means that the construction is simpler and less voluminous and that the axial forces, moreover, are not transferred to the transmission.

Abstract: A part assembling apparatus is provided with a plurality of assembling portions and a ball screw shaft. Each of the assembling portion includes a nut runner for assembling a part to an assembling target. The ball screw shaft includes a thread portion. At least two of the plurality of assembling portions respectively include nut portions threadedly engaged with the thread portion. The nut portions are movable in an axial direction of the ball screw shaft. The thread portion includes a first thread part having a first pitch and a second thread part having a second pitch different from the first pitch.

Abstract: A power strut assembly for a vehicle includes a first strut member having joined outer walls that define an interior cavity. The first strut member extends from a first end to a second end. The first end includes a base wall joined to the outer walls. A second strut member also having joined outer walls defining an inner cavity extends from a first end to a second end. The second strut member is telescopically disposed within the interior cavity of the first strut member. A lead screw extends from a first end to a second end and is rotatively retained at the first end of the first strut member. The lead screw extends into the interior cavities of the first and second strut members. A clutch is retained by the second strut member and the lead screw is positioned to interact with the clutch.

Abstract: Rotational motion of a male screw member is converted to linear motion of a female screw member that is screw engaged with the male screw member, thereby causing movement of a rod member for clamping an object. When a load from the object becomes larger than a predetermined value, and exceeds the frictional force of a viscous material and a friction plate, the female screw member is gradually turned and clamping continues while movement of the rod member is decelerated.