Abstract: A vehicle door hinge device may include a case set diagonally provided toward an outside of a vehicle body at a location of the vehicle body corresponding to an end portion of a door, and including a slide case slidable with respect to a main case, a sliding arm provided on the slide case, and pivotally connected to a door hinge bracket fixed to the end portion of the door in an outside of the slide case, and a driving unit including first and second screws that are motor-driven and disposed in an interior of the main case in a longitudinal direction of the main case to be coupled to the slide case and the sliding arm, respectively, and configured to simultaneously slide the slide case and the sliding arm with respect to the main case.

Abstract: A lifting column includes a drive unit, a lifting tube, and a transmission assembly. The lifting tube includes a first tube, a second tube, a third tube, a fourth tube, and a fifth tube. The transmission assembly includes a first screw rod, a second screw rod, a third screw rod, and a fourth screw rod. The drive unit is in transmission fit with the first screw rod and drives the first screw rod to rotate. A lower end of the second screw rod has a first nut in transmission with the first screw rod, a lower end of the third screw rod has a second nut in transmission with the second screw rod, a lower end of the fourth screw rod has a third nut in transmission with the third screw rod, and a lower end of the first tube has a fourth nut in transmission with the fourth screw rod.

Abstract: A filter press is disclosed for separating solid components from liquid components of a slurry. The filter press includes side beams and a plurality of filter plates oriented at right angles to the longitudinal direction of the side beams. The filter plates are adapted to move along the side beams. A stationary end is arranged on one end of the side beams and a movable head is adapted to transport the filter plates along the side beams. The filter press includes a press system adapted to exert a closing pressure on the filter plates to press the filter plates against each other. The press system further includes at least one electrically driven actuator adapted to generate an axially directed force on the filter plates by the movable head. The disclosure also relates to a method for separating the solid components from the liquid components of a slurry.

Abstract: A lifting device with a cable management is provided. The lifting device includes: an outer pipe, an actuation mechanism, a linkage member, a cable, and a cable management component. The actuation mechanism is accommodated in the outer pipe and has a motor and a screw rod. The linkage member is accommodated in the outer pipe and mutually screw-fitted with the screw rod to operate, and moves relative to the outer pipe. The cable has a spiral coiled cable unit. A shaft core line in parallel with the screw rod is defined by the spiral coiled cable unit. The cable management component is disposed in the outer pipe and in parallel to the shaft core line. The spiral coiled cable unit is reeled on the cable management component. Accordingly, the cable may be stably positioned and the cable may be prevented from rubbing or being tangled with the screw rod.

Abstract: Disclosed is a telescopic utility pole where the individual segments are threaded on the outer and inner surfaces, the adjacent segments are threadedly engaged and extension/retraction of the pole segments is performed by twisting along threaded path. The advantage of using the threaded telescopic utility pole is that it can be deployed and erected quickly as compared to traditional utility poles.

Abstract: An electric actuator includes: a drive part (2); a motion conversion mechanism part (3) configured to convert a rotary motion from the drive part (2) to a linear motion in an axial direction parallel with an output shaft (10a) of the drive part (2); a driving force transmission part (4) including a transmission gear mechanism (28) configured to transmit a driving force from the drive part (2) to the motion conversion mechanism part (3); and a motion-conversion-mechanism support part (5) including a double-row bearing (40) configured to support the motion conversion mechanism part (3), wherein the double-row bearing (40) is arranged on one side in the axial direction with respect to the transmission gear mechanism (28).

Abstract: An apparatus for a thrust reverser actuation system (“TRAS”), the apparatus comprising: an input shaft; a first component located concentrically around the input shaft; a second component located concentrically around the first component; a first balls crew mechanism between the input shaft and the first component, and configured such that rotational movement of the input shaft causes a translational movement of the first component via the first ballscrew mechanism; and a second ballscrew mechanism between the first component and the second component, and configured such that rotational movement of the first component causes a translational movement of the second component via the second ballscrew mechanism.

Abstract: The invention relates to a spindle gearbox (1) of an electric seat drive, comprising a gearbox housing (2) for mounting a worm gear (3) and a worm, the worm meshing with the worm gear (3), a threaded spindle (4, 5) connected to the worm gear (3), a first lid (6), and a second lid (7), wherein the first lid (6) and the second lid (7) are fastened parallel to one another on the gearbox housing (2). The threaded spindle (4, 5) is guided through the first lid (6), and the first lid (6) is fastened on the gearbox housing (2) independently of the second lid (7).

Abstract: A security gate actuator includes a main ball screw, a main ball nut, a drive shaft stage, and at least a drive ball. The main ball screw may further include a circular channel disposed on an outer surface of the main ball screw. The main ball nut may be disposed on the main threads of the main ball screw and configured to translate rotational motion of the main ball screw to linear motion of the main ball nut. The drive shaft stage may include a drive shaft end and a drive shaft tube attached to the drive shaft end, the drive shaft end coupled to the main ball nut. The drive ball may be disposed in the circular channel of the main ball screw and push against the drive shaft tube to translate the rotational motion of the main ball screw to rotational motion of the drive shaft tube.

Abstract: A compact deployable/retractable running board assembly for a motor vehicle including a running board, linkage coupled to the running board, and a motor assembly coupled to an actuator, the running board moveable between at least one stowed position and at least one deployed position. The linkage includes a drive arm connected to a pivot shaft within a housing at a location on the pivot shaft between two bushings that are coupled to the pivot shaft within the housing. The linkage also includes an idler arm connected to a pivot shaft within an idler housing. The actuator is operably coupled to the linkage to cause rotation of the linkage to move the running board between the at least one stowed position generally under the motor vehicle and at least one deployed position to provide a step surface for a user.

Abstract: A table includes a table top with at least one collapsible leg which includes a top tube, a middle tube and a bottom tube. A connector is connected to the underside of the table top and the top end of the outer tube. An inner threaded rod is connected to a motor which is connected to the connector. An outer threaded rod is movably mounted to outside of the inner threaded rod. A top nut is fixed to the middle tube and threadedly connected to the inner threaded rod. A bottom nut is connected to the bottom tube and threadedly connected to the outer threaded rod. When the motor drives the inner threaded rod, the outer threaded rod is moved relative to the inner threaded rod so that the middle tube moves relative to the top tube, and the bottom tube moves relative to the middle tube.

Abstract: A method of securing an assembly of a drug delivery system, comprising: configuring at least a first component and a second component of the assembly in a closed configuration ready for placement into the drug delivery system; installing an assembly key including a locking element on the assembly to secure the assembly in said configuration; and, transporting the assembly with the assembly key installed.

Abstract: The present invention relates to a height-adjustable table stand (1) comprising a height-adjusting arrangement for adjusting the height of the table, wherein the height-adjusting arrangement comprises at least one leg (2), each leg having an inner tubular member (3) and an outer tubular member (4) arranged for telescopic movement relative to each other. The height-adjusting arrangement further comprises a linear actuator coupled to said tubular members (3, 4) and adapted to provide the telescopic movement between the tubular members, an electric motor (12) connected to the linear actuator and adapted to operate the linear actuator for providing telescopic movement between the tubular members, and a control device (13) for controlling the operation of the electric motor (12). The table stand (1) further comprises a solar panel (10) connected to the height-adjusting arrangement for providing power to the electric motor (12).

Abstract: A linear actuator assembly (30) having an inner sleeve (100) which moves in a first direction or in an opposite second direction relative to a fixed outer sleeve (90) between a fully extended position and a fully retracted position. The linear actuator assembly (30) includes a stop mechanism (99, 112) limiting the movement of the inner sleeve (100) relative to the outer sleeve (90) in the extended position, the stop mechanism (99, 112) having a first portion (99) associated with said outer sleeve (90) and a second portion (112) associated with said inner sleeve (100) with the first (99) and second (112) portions abutting each other when said inner sleeve (100) is in the extended position to define a hard stop.

Abstract: A linear actuator includes an actuator housing (20), a drive screw assembly (26) extending into the actuator housing (20), a tubular thrust rod (22), and an inner sleeve (104) disposed therein and engaging the drive screw assembly (26) for supporting the drive screw assembly (26) against radial movement during axial movement of the thrust rod (22) relative to the actuator housing (20). The drive screw assembly (26) includes a rotatable drive screw (72), a nut (74) coupled to the thrust rod (22) for movement with the nut (74) and in threaded engagement with the screw (72) for driving the nut (74) relative to the screw (72), and a screw bearing (76) coupled to a distal end (90) of the screw (72) for providing engagement between the screw (72) and the inner sleeve (104), where the nut (74) translates rotational movement of the screw (72) into axial movement of the thrust rod (22).

Abstract: A linear electro-mechanical actuator includes a containment structure (2), a nut (5) positioned in the containment structure (2), a screw shaft (6) inserted in the nut (5) and interconnected with the nut (5) via a helical recirculating ball coupling, and an anti-rotation mechanism (9) positioned inside the screw shaft (6) to prevent the screw shaft (6) from rotating about the axis (X). The anti-rotation mechanism (9) includes a guide unit (10) fixed cantilever-style to the containment structure (2) and connected to the screw shaft by a non-rotational coupling.

Abstract: A robot includes an actuator assembly, first and second parallel telescoping lead screw assemblies cantilevered from the actuator assembly, and an end effector supported by ends of the lead screw assemblies. The actuator assembly causes each lead screw assembly to independently deploy and retract.

Abstract: A fabricating apparatus for a light tunnel is provided, which comprises a core rod, a fixing block and a moving block. The light tunnel comprises a plurality of reflecting sheets, and each reflecting sheet leans on both a plurality of first bumps of the fixing block and a plurality of second bumps of the moving block to define a first inner profile and a second inner profile of the light tunnel, respectively. Thereby, the fabricating apparatus defines the inner scope of the light tunnel, and the inner scope of the light tunnel can be easily and stably controlled. Furthermore, a fabricating method for fabricating the light tunnel is also provided.

Abstract: A dual-screw linear actuator includes an inner push tube, an outer push tube, a first nut part, and a second nut part. The outer push tube is sheathed on the inner push tube and axially movable on the inner push tube; the first nut part is coupled to the outer push tube and screwed to an inner screw which has a coupling disposed at a front end of the inner screw; the second nut part is coupled to the inner push tube and screwed to an outer screw, and the outer screw is hollow, and the coupling is sleeved into the outer screw for an axial movement. The inner screw drives the outer screw to rotate, such that the first and second nut parts can synchronously push the inner and outer push tubes to extend or contract, so as to improve the stroke of extension or contraction.

Abstract: An electromechanical, modular, single-column, trash compactor with a particularly small size and low weight. In particular, a trash compaction device which can be used on-board aircraft, trains, ships and/or for civil applications and generally in all the locations and/or modes of transportation where the auxiliary service equipment must occupy as little space as possible. The compaction device is formed by a system of hollow telescopic screws (5,6), for example of the recirculating ball type, operated by a motor (2) housed inside the said screws (5,6). The compactor may be conveniently installed in compartments, which are fixed or movable on wheels, such as a trolley, so as to allow easy displacement within the mode of transportation and insertion within the appropriate working spaces.

Abstract: A sealing device for mounting a monument on a structural element of an aircraft and for providing a seal between the sealing device and the floor of the aircraft is provided. The sealing device comprises a cylindrical element with a pin for attaching the sealing device to the structural element and a recess for receiving another pin of a mounting device to which the monument is attached. The sealing device may have a smaller diameter than a mounting block of the mounting device such that the seal cannot be damaged by trolley wheels.

Abstract: Apparatus is described for administering a substance to a subject. A vial contains the substance and a stopper is disposed within the vial and is slidably coupled to the vial. A first threaded element is (a) rotatable with respect to the vial and (b) substantially immobile proximally with respect to the vial during rotation of the first threaded element. A second threaded element is threadedly coupled to the first threaded element. At least a distal end of the second threaded element is substantially non-rotatable with respect to the vial, and the distal end of the second threaded element defines a coupling portion that couples the second threaded element to the stopper. The first threaded element, by rotating, linearly advances the stopper and at least the distal end of the second threaded element toward a distal end of the vial. Other embodiments are also described.

Abstract: A telescopic bollard comprising: a bollard assembly, the bollard assembly including an outer bollard part defining a guide bore extending in a direction along the axis thereof from a base end to a head end thereof. An inner bollard part is housed within the guide bore so as to be slidingly moveable therealong between: a telescopically retracted state in at least some of the length of the inner bollard part resides within the guide bore, and a telescopically extended state in which relatively less of the length of the inner bollard part resides within the guide bore and relatively more of said length extends beyond the head end of the outer bollard part.

Abstract: An actuator arrangement comprises a rotatable shaft, a nut mounted upon the shaft and translatable along the shaft upon rotation of the shaft relative to the nut, and a lock arrangement operable to lock the shaft and nut against relative rotation, the lock arrangement comprising a lock component mounted upon one of the shaft and the nut for axial movement relative thereto but held against angular movement relative thereto, the lock component being co-operable with an abutment provided on the other of the shaft and the nut, or a component associated therewith, to lock the shaft and nut to one another against relative rotation.

Abstract: Linear actuators that allow for improved self-locking properties without sacrificing axial response are provided. A linear actuator can have two screws extending from opposite ends of the actuator. The screws are joined by and threadably coupled to an elongate rotating nut. An elongate magnet is disposed around and coupled to the nut, and a stator including coils surrounds the magnet and nut. The magnet and nut are not axially fixed with respect to the stator. Rotation of the nut causes axial displacement of both screws, causing the screws to move closer together or farther apart. A pitch of the screw threads can be selected to enhance self-locking properties.

Abstract: A lifting column, preferably for height-adjustable tables comprises a guide with three mutually telescopic members (1,2,3) and a motor driven spindle unit for bringing about the movement. The second member (2) of the guide is with a lower end secured to a lower end of the second spindle (6). The second spindle nut (8) co-operating with the second spindle (6) is with a bearing (18) with a rigid connection (28) fixed to a shaft stub (16) secured to an upper end of a drive tube (9). The shaft stub (16) is via a second bearing (20) secured to a mounting plate (23), by means of which the spindle unit is secured in the lifting column. Thus, the vertical load on the lifting column is led through the spindle unit around the guide (1,2,3). This enables a better and more optimum dimensioning of the guide (1,2,3) and the spindle unit, just as it is advantageous in terms of assembly and not least it enables a better implementing of a squeeze protection in the lifting columns.

Abstract: A linear actuator (20) including three nested telescoping sections (22, 24, 26) actuated by two internal screw drives (28, 30). First and second screw drive nuts (32, 34) are rotatably mounted in the intermediate telescoping section (24) to linearly translate respective first and second screw shafts (36, 38), which are fixed to respective distal ends (21, 27) of the outer (22) and inner (26) telescoping sections. The drive nuts may be mounted at opposite ends of the intermediate section in a housing (23, 25, 29), and may be driven by a motor (40) therein via an idler shaft (42) that spans between the two drive nuts. The motor may be designed to serve alternately as a regenerative resistance brake (R1). A mechanical brake (43) may alternately or additionally be provided. Either or both brakes may be set to engage by default on power outage.

Abstract: A linear actuator (1), comprising a threaded spindle (10) with a longitudinal extension along a longitudinal axis (X), the spindle (10) having a right hand thread (11) and a left hand thread (12), both threads provided over a common longitudinal length of the spindle, the spindle (10) being adapted to be rotated by a driving device (60). The linear actuator further comprises a first nut member (20) provided with a right hand thread (21) and a second nut member (30) provided with a left hand thread (31). The first and the second nut members (20, 30) are in threaded connection with the spindle (10) in such a way that rotation of the spindle provides opposite linear movement of the nut members (20, 30) relative to each other along the longitudinal axis (X). Thereby, a linear actuator is provided with three parts that all move linearly relative to each other during rotation of the spindle.

Abstract: A thrust reverser for a turbojet engine includes a telescopic linear actuator for a moving cowl and a nozzle-forming end part. The telescopic linear actuator has a base attached to a fixed frame, acting as a housing for a first rod prevented from rotating but able to be translationally driven by a first drive shaft connected to a rotational-driver. The first rod is attached by one end to the moving cowl and supports a second rod, which is attached by one end to the nozzle-forming end part that is to be moved. The second rod is prevented from rotating and translationally driven by a second drive shaft passing through the base and connected to a rotational-driver. In particular, the rotational-driver of the rods includes a motor to drive an input shaft of a differential having two output shafts.

Abstract: A dual-screw linear actuator includes an inner push tube, an outer push tube, a first nut part, and a second nut part. The outer push tube is sheathed on the inner push tube and axially movable on the inner push tube; the first nut part is coupled to the outer push tube and screwed to an inner screw which has a coupling disposed at a front end of the inner screw; the second nut part is coupled to the inner push tube and screwed to an outer screw, and the outer screw is hollow, and the coupling is sleeved into the outer screw for an axial movement. The inner screw drives the outer screw to rotate, such that the first and second nut parts can synchronously push the inner and outer push tubes to extend or contract, so as to improve the stroke of extension or contraction.

Abstract: An electric linear actuator has a guide screw and a telescopic tube. A safety mechanism for the linear actuator includes a nut, a nut sheath, a sleeve, and a torsion spring. The nut connects the guide screw. The nut sheath is fixed on one side of the nut and is provided with a plurality of bumps. One end of the sleeve is put around the nut sheath and the other end thereof is connected to the telescopic tube. The sleeve is provided with a plurality of rabbets corresponding to the bumps. The torsion spring is disposed around the nut sheath and the sleeve. When the guide screw is rotated, the nut sheath is engaged with the sleeve by embedding the bumps into the rabbets. When the sleeve stops, the bumps and the rabbets depart from engagement to make the nut sheath and the nut freely rotate against the sleeve.

Abstract: A telescopic actuator comprising a cylinder having a structure for coupling the cylinder to a first external element a rod mounted to slide telescopically in the cylinder along a sliding axis and including a structure for coupling it to a second external element and a lead screw mounted to rotate in the cylinder about the sliding axis and extending inside the rod to co-operate with a nut secured to the rod, such that rotating the lead screw causes the rod to slide. There also is a drive structure for driving the lead screw in rotation and a retention structure for axially retaining the lead screw. The retention structure holds a bearing of the lead screw captive in an axial direction and is arranged to retain the bearing of the lead screw with axial clearance suitable for absorbing movements imparted to the rod relative to the cylinder.

Abstract: A linear actuator comprises a reversible electric motor (2) which, via a transmission, is capable of driving a spindle (4) having a spindle nut (5) secured against rotation and comprises a power supply and a controller. The actuator moreover comprises a memory unit for collecting at least one set of data from the operation, indicating how long and how hard the actuator has worked. It is hereby possible to obtain an overview of the mechanical state of the actuator and thereby prevent unfortunate occurrences and accidents as a consequence of wear-out of the actuator.

Abstract: A height-adjustable actuation device comprises a drive for height adjustment of the actuation device; a casing having a longitudinal axis; a hollow spindle arranged in the casing for displacement of a first lid arranged on the hollow spindle along the longitudinal axis; an internal spindle arranged inside the hollow spindle for displacement of a second lid arranged on the internal spindle along the longitudinal axis, with the hollow spindle and the internal spindle being non-rotatably connected to each other in terms of a rotation about the longitudinal axis, and with the hollow spindle and the internal spindle being displaceable relative to each other along the longitudinal axis.

Abstract: A linear actuator comprising a spindle-based linear drive (1) having an inner threaded spindle (5) and an outer element (2) surrounding the threaded spindle (5), in which the threaded spindle (5) can be moved in the axial direction; and a telescopic housing (20) with a first telescope part (21) and a second telescope part (22), which is surrounded at least in part by the first telescope part (21). On its side facing the first telescope part (21), the second telescope part (22) has an adapter part (24) that is connected rotationally fixedly to the second telescope part (22) and has a central opening. The linear drive has a connecting element (30) that is mounted on the outer element (2) and comprises snap elements (31) that are engaged with the central opening of the adapter part (24) in such a manner that the connecting element (30) is held in the adapter part (24).

Abstract: A linear actuator comprises a drive unit housing (10) with a drive unit (7, 8) arranged therein, a driveshaft (1), hollow on the inside, driven by the drive unit (7, 8), and a profile tube (2) non-rotatably and longitudinally movably connected on the outside to the driveshaft (1). A threaded hollow spindle (3) with an outside thread is arranged between the driveshaft (1) and the profile tube (2) and fixedly connected to the drive unit housing (10). A hollow-spindle nut (4) is fixedly connected to the profile tube (2) at a first end of the profile tube (2) and cooperates with the outside thread of the threaded hollow spindle (3). A spindle nut (6) is fixedly connected to the profile tube (2) at a second end thereof. A threaded spindle (5) is arranged in the interior of the driveshaft (1) and cooperates with a thread of the spindle nut (6).

Abstract: The present invention pertains to a linear drive and to adjustable units with a linear drive. The linear drive includes a central, drivable connecting element, a stationary first element in working connection with the connecting element, and a stationary second element in working connection with the connecting element and arranged axially opposite the first element. The first and second elements are connected to the connecting element by corresponding pairs of threads. The pairs of threads are designed as oppositely threaded pairs to create a compact, essentially three-part linear drive capable of maximum travel distance.

Abstract: An actuator assembly includes a first motor having a first transmission mechanism, a second motor having a second transmission mechanism, and a drive shaft operatively coupled to the first transmission mechanism of the first motor and the second transmission mechanism of the second motor. The actuator assembly includes a torque application system disposed in operative communication with the first motor and the second motor, the torque application system configured to direct an application of a translation torque and a preload torque between the first motor and the first transmission mechanism and between the second motor and the second transmission mechanism.

Abstract: An assembling mechanism of a self-locking linear actuator includes a gearbox, a one-piece rear retainer seat and a casing. The gearbox is composed of two half pieces, which are mated with each other for accommodating and locating a transmission mechanism of the actuator. The rear retainer seat is fixedly held in the gearbox for supporting a bearing of a threaded rod of the transmission mechanism and bearing the stress from the threaded rod. The contact faces of the rear retainer seat and the gearbox are regular polygonal to facilitate adjustment of fixing angle of the rear retainer seat. The casing is composed of two half casings, which are mated with each other to accommodate the transmission mechanism, the gearbox and the rear retainer seat. The mating faces of the half casings are parallel to the axis of the output shaft of a motor to facilitate connection operation of the casing.

Abstract: A safety mechanism for an electric linear actuator is disclosed. The linear actuator has a guide screw and a telescopic tube. The safety mechanism includes a nut, a nut sheath, a sleeve, and a torsion spring. The nut connects the guide screw. The nut sheath is fixed on one side of the nut to form an integer and is provided with a plurality of bumps. One end of the sleeve is put around the nut sheath and the other end thereof is connected to the telescopic tube. The sleeve is provided with a plurality of rabbets corresponding to the bumps. The torsion spring is disposed around the nut sheath and the sleeve. When the guide screw is rotated, the nut sheath is engaged with the sleeve by embedding the bumps into the rabbets. When the sleeve stops, the bumps and the rabbets depart from engagement to make the nut sheath and the nut freely rotate against the sleeve.

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 rotary drive, with a drive element, with an outer tube, with an end piece mounted and able to rotate in relation to the outer tube and unable to shift axially, with a helical slider arranged able to move axially in the outer tube but not rotate, with a helical shaft arranged axially parallel in the outer tube, which interacts by a steep thread with a thread profile of the helical slider, wherein the relative axial movement of helical slider and helical shaft brought about by the drive element is transformed into a relative rotation of outer tube and end piece, wherein the drive element is arranged coaxially inside the outer tube, the helical shaft and the thread profile of the helical slider are arranged coaxially in the outer tube, and the end piece is mounted coaxially in at least one end of the outer tube.

Abstract: A telescoping extension device includes a lead cylinder having a bore extending at least partially therethrough with at least a portion of the bore being threaded and a first lead screw disposed at least partially within the bore of the lead cylinder with at least a portion of an outer surface of the first lead screw having threads that engage the threads within the bore of the lead cylinder. A second lead screw is disposed at least partially within the bore of the first lead screw with at least a portion of an outer surface of the second lead screw having threads that engage the threads within the bore of the first lead screw.

Abstract: This disclosure relates to a landing gear system that includes a landing gear strut rotatable between stowed and deployed positions. A lock-stay is connected to the landing gear strut and is movable between locked and unlocked conditions. An unlock actuator is connected to the lock-stay and includes first and second members movable relative to one another. The first member is movable between first and second positions that correspond to the locked and unlocked conditions. A controller is in communication with the unlock actuator and is configured to command the unlock actuator between the first and second positions in response to an input. The second member is permitted to free-drive relative to the first member between the stowed and deployed positions with the lock-stay in the unlocked condition.

Abstract: This disclosure pertains to a lockdown mechanism for an electric drive screw telescoping mast. The lockdown mechanism comprising a plurality of elongated tube sections which are telescopingly attached to each other, each tube section comprising a substantially hollow body. An elongated drive screw is disposed within the hollow body and includes a plurality of threads for extending and retracting the elongated tube sections. A lock subassembly includes a housing and a center hub, the housing comprises a load bearing top and a hollow cavity, the lock subassembly being rigidly attached to said center tube and axially aligned along a central axis with said plurality of elongated tube sections. The center hub is movably engaged within the hollow cavity of the housing and includes at least one locking pin adapted to the center hub that is movably engaged to the structural envelope when the mast is in the lockdown position.

Abstract: A telescoping actuator is described which provides a first and third segments operatively connected to a second segment. A locking system locks the first and third segment in rotation with respect to one another. Upon rotation of the second segment, the first and third segments are displaced relative to one another and the second segment. The first and third segments are operatively coupled to the second segment by corresponding sets of threads in some embodiments. The locking system may be interlocking tubes, or shafts displaced internal to the actuator. Rotational energy may be imparted to the second stage externally about its outer diameter or internally by a driveshaft operatively connected to a drive source.

Abstract: A vehicle gear box shift actuator and apparatus including the same. The actuator includes a lead screw; a drive nut threaded on the lead screw; a plunger; a first spring disposed between the drive nut and a first end of the plunger; a second spring disposed between the drive nut and a second end of the plunger opposite from the first end. Non-contact position sensing of the actuator output is also provided.

Abstract: A safety mechanism for an electric linear actuator is disclosed. The linear actuator has a guide screw and a telescopic tube. The safety mechanism includes a nut, a nut sheath, a sleeve, and a torsion spring. The nut connects the guide screw. The nut sheath is fixed on one side of the nut to form an integer and is provided with a plurality of bumps. One end of the sleeve is put around the nut sheath and the other end thereof is connected to the telescopic tube. The sleeve is provided with a plurality of rabbets corresponding to the bumps. The torsion spring is disposed around the nut sheath and the sleeve. When the guide screw is rotated, the nut sheath is engaged with the sleeve by embedding the bumps into the rabbets. When the sleeve stops, the bumps and the rabbets depart from engagement to make the nut sheath and the nut freely rotate against the sleeve.

Abstract: This disclosure relates to a landing gear system that includes a landing gear strut rotatable between stowed and deployed positions. A lock-stay is connected to the landing gear strut and is movable between locked and unlocked conditions. An unlock actuator is connected to the lock-stay and includes first and second members movable relative to one another. The first member is movable between first and second positions that correspond to the locked and unlocked conditions. A controller is in communication with the unlock actuator and is configured to command the unlock actuator between the first and second positions in response to an input. The second member is permitted to free-drive relative to the first member between the stowed and deployed positions with the lock-stay in the unlocked condition.

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.