Class / Patent application number | Description | Number of patent applications / Date published |
074890370 | Limit stop | 34 |
20080196525 | Stop Device For a Spindle Drive - A stop device is provided for a spindle drive which consists of a threaded spindle and a spindle nut with a stop. The stop device includes a limit stop and also a faceplate arranged between the stop of the spindle nut and the limit stop. The limit stop and the stop of the spindle nut are offset in relation to one another and are able to act upon the faceplate such that a bending moment can be applied to the faceplate when the threaded spindle and spindle nut of the spindle drive are in a limit stop position relative to one another. | 08-21-2008 |
20090151490 | Linear Actuator - By a linear actuator of the type comprising a driven spindle with a spindle nut, the outer positions and possibly also the intermediate positions of the spindle nut can be determined by a specially designed switch construction. This switch comprises an elongated conductor ( | 06-18-2009 |
20090249905 | Linear Actuator - A linear actuator comprises an outer tube, an intermediate tube and an inner tube, and the tubes are all polygonal in cross section and are mounted orderly. The outer tube is disposed at the bottom thereof with a push device having a screw and a nut that are screwed with each other. The nut is engaged in the intermediate tube and is linked to move axially by the screw. The intermediate tube can be movably equipped with a pulling member, and the pulling member can link the inner tube to synchronously move in the axial direction. By such arrangements, the linear actuator allows the respective tubes to extend and retract axially relative to one another while preventing them from moving relative to one another in radial direction, thus achieving the stable and smooth axial movement. | 10-08-2009 |
20090249906 | Linear Actuator - A linear actuator comprises an outer pipe, a middle pipe and an inner pipe, and the pipes are hollow polygonal pipes and are mounted orderly. A bottom of the outer pipe is disposed with a pushing device and a rolling device. The pushing device having a screw and a nut that are screwed with each other. A pulling member is driven to move the inner pipe and is fixed between the inner pipe and the outer pipe by cooperating with a pulley disposed on the middle pipe and a steel wire, such that the pipes can be synchronously moved in an axial direction. The steel wire winds around a rolling shaft of the rolling device, such that the steel wire can be loosened or tightened along with the pipes, enabling the pipes to extend or retract more stably. | 10-08-2009 |
20090288510 | ACTUATOR FOR DISPLACEMENT OF A HOLDER AGAINST A HOMING-POSITION - A lead screw actuator for displacing holder with a collimator lens in an optical scanning device has a home-position for accurately determining the position of the collimator lens. An anti-seize construction is provided to avoid the holder to get stuck against the home-position due to the friction between both surfaces. | 11-26-2009 |
20090293655 | LINEAR ACTUATOR - A linear actuator includes a housing formed of a first half shell and a second half shell and defining an accommodation chamber, a front opening in front of the accommodation chamber and a receiving chamber at the bottom side of the accommodation chamber, a driving mechanism having a push rod movably mounted in the accommodation chamber and extending out of the front opening, a motor mounted outside the accommodation chamber and a spindle coupled to and rotatable by the motor for causing the transmission shaft to reciprocate, and limit switches detachably mounted in the receiving chamber for stopping the motor upon movement of the transmission shaft to a front or rear limit position. | 12-03-2009 |
20090301239 | ELECTROMOTIVE FURNITURE DOUBLE DRIVE AND SWITCH ARRANGEMENT - An electromotive furniture double drive includes at least one drive motor, which is in driving engagement with a speed reduction gear train. An output element, which is secured against rotation, can be moved in its longitudinal direction by means of the speed reduction gear train. At least the speed reduction gear train and the output element are arranged in the housing, and the end positions of each output element are limited by at least one end switch. The output element and/or the housing has an adjustment device by means of which the position of the switching threshold of the at least one end switch can be adjusted from an area outside the housing. | 12-10-2009 |
20100050796 | HIGH LOAD LIFT AND SHOCK LINEAR ACTUATOR - A high load and shock linear actuator is provided that may be used to position a hatch on a waterborne platform. The actuator includes a power-screw actuator, a manual operator, a bidirectional brake, an actuator motor, and a motor brake. The power-screw actuator is coupled to receive a drive torque from either the actuator motor or the manual operator, and is responsive to this drive torque to position the hatch. The bidirectional brake transfers manual input torque supplied to its input by the manual operator, and prevents torque supplied to its output from being transferred to its input. The actuator motor includes a stator, a rotor, a ring gear, and a differential carrier assembly. The differential carrier assembly is disposed within the rotor inner volume. The motor brake is mounted adjacent the actuator motor and selectively prevents and allows actuator motor rotation. | 03-04-2010 |
20100139429 | ACTUATOR FOR LIFTING DEVICE - 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. | 06-10-2010 |
20100186529 | Linear actuator - A linear actuator implements two contact switches for travel-limit control of an output shaft of the linear actuator and implements a variable resistor that is connected with a reduction gear of a motor of the linear actuator for providing a position feedback function. | 07-29-2010 |
20100282009 | LINEAR ACTUATOR - A linear actuator comprising a spindle ( | 11-11-2010 |
20100319472 | Protection device for actuator - A protection device for an actuator includes a buffer assembly assembled to an open end of a screw in the actuator. Thereby, when the actuator reaches its extension limit stop or retraction limit stop, the buffer assembly buffs excessive impact among internal components in the actuator. | 12-23-2010 |
20110072921 | COMPLIANT NON-JAMMING END OF TRAVEL STOP FOR A BALL SCREW ACTUATOR - 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. | 03-31-2011 |
20110107859 | SUSPENSION ACTUATOR - A suspension actuator ( | 05-12-2011 |
20110132115 | STEP ACTUATOR - Disclosed is a step actuator. The step actuator includes a housing; a stator installed in the housing; a rotor positioned radially inward from the stator, the rotor rotating and protruding from one side of the housing; a bearing installed at one side of the housing so as to be coupled with the rotor; a bearing cover coupled with one side of the housing to restrain movement of the bearing; a screw member coupled with the rotor to linearly move according to rotation of the rotor; and a mounting member coupled to the bearing cover to support the screw member. | 06-09-2011 |
20110162469 | FASTENING A STOP DISK - A component is described for adjusting a movable part, of a vehicle in particular, having a gear shaft, which extends along an axis of rotation and has a receiving groove, and having a stop disk, which is situated in the receiving groove, the receiving groove being situated obliquely to the axis of rotation. Also described is a component in which the receiving groove has a contour, so that the stop disk is in contact with the receiving groove in a first contact area and in a second contact area in both the unloaded state and under load by a blocking force acting in a spatial direction parallel to the axis of rotation, the first contact area and the second contact area being situated on opposite sides of the stop disk. Also described is a component in which the receiving groove has an upper side and a lower side, at least the upper and/or lower sides of the receiving groove forming an acute angle with the axis of rotation. Also described is a gear shaft of the component. | 07-07-2011 |
20110290050 | ADJUSTING DEVICE HAVING A SPINDLE DRIVE - The invention relates to an adjusting device ( | 12-01-2011 |
20120085186 | BALL SCREW WITH MARKINGS FOR STOP - A ball screw ( | 04-12-2012 |
20120255380 | STROKE-RESTRICTING DEVICE OF LINEAR ACTUATOR AND WIRE-REELING MECHANISM THEREOF - The present invention relates to a stroke-restricting device of a linear actuator and a wire-reeling mechanism thereof The linear actuator includes a base and a telescopic pipe. The stroke-restricting device includes a box, a movable member, a block, a pair of switches, and a wire-reeling mechanism. The box is fixed to the base and has a wall plate. The wall plate is provided with a through-hole. The movable member includes a rod penetrating the through-hole and movable with respect to the box. The block is fixed to the rod. The pair of switches is fixed to the box to correspond to the block. Each of the switches has a trigger portion for generating electrical signals by means of contact of the block. Each of the trigger portions is located at two opposite ends of a moving path of the block. The wire-reeling mechanism includes a wire disposed in the telescopic pipe and moving therewith. One end of the wire is connected to the movable member. By this structure, only a small space can be used to control a limit position of a long distance. | 10-11-2012 |
20120318082 | APPARATUS FOR CONVERTING A ROTATIONAL MOVEMENT INTO AN AXIAL MOVEMENT - An apparatus for converting a rotational movement into an axial movement. A threaded rod is provided, on which a nut is arranged to be movable axially to the threaded rod. At least one blocking structure is provided, which is so arranged that it blocks rotational movement of the nut during the axial movement along the threaded rod. There is provided on the threaded rod at least one end stop, which limits axial movement of the nut along the threaded rod. Between the axially movable nut and the end stop, a wedge lock washer pair is arranged. The wedge lock washer pair is so embodied that the wedge lock washers are brought into engagement by the pressing of the nut against the end stop and produce a prestress torque, wherein torque for releasing the nut from the end stop is smaller, essentially by the prestress torque of the wedge lock washer pair, than the torque applied as the nut first pressed against the end stop. | 12-20-2012 |
20130000432 | DEVICE FOR ADJUSTING AND LOCKING A MOVABLE CONTROL SURFACE - An apparatus is provided for adjusting and locking a movable control surface, which includes, but is not limited to a rotatably held spindle, an adjustment body, a linear guide, a drive unit, a linear positioning encoder and a control unit. The adjustment body with the linear guide is slidably guided along a first movement axis, and the spindle is connected to the adjustment body for moving the adjustment body along the movement axis. The adjustment body is configured to connect to a control surface mount, and the linear positioning encoder and the drive unit are connected to the control unit. The latter is designed to adjust a predetermined actuating position of the adjustment body by rotation of the spindle with the drive unit and by comparing an actual position, detected by the linear positioning encoder, of the adjustment body with the predetermined actuating position. | 01-03-2013 |
20130008270 | LIMIT SWITCH ASSEMBLY - A limit switch assembly for a screw jack includes a worm screw jack assembly, a gear mechanism and a limit switch mechanism. The worm screw jack assembly includes a worm shaft, a worm gear and a screw jack shaft. The gear mechanism includes a piston, an adapter block, a planetary gearbox, and a gearbox shaft. The piston is drivable by the worm gear and engages the gearbox and the gearbox shaft extends out of the adapter block on an opposing side of the piston. The limit switch mechanism is coupled to the screw jack by the gear mechanism, and includes at least two limit switches operable to control movement of the screw jack shaft. The planetary gearbox may have interchangeable ratios to accommodate worm gear screw jacks with an increased number of gear ratios, drive screw lead, and length of travel requirement combinations. | 01-10-2013 |
20130068053 | ACTUATOR SYSTEM AND METHOD - Systems and methods disclosed herein may be useful for use in a ballscrew assembly. In this regard, a ballscrew assembly is provided comprising a ballscrew having a ballscrew stop, a ballnut having a ballnut stop, wherein contact between the ballnut stop and the ballscrew stop impede rotation of the ballscrew relative to the ballnut. The ballnut stop may comprise an axial mating surface and the ballscrew stop may comprise an axial mating surface. Additionally, the ballnut may comprise threads axially spaced a first distance apart and the ballnut stop comprises a surface having length equal to the first distance. | 03-21-2013 |
20130139625 | ENTERTAINMENT BUTTON DEVICE AND GAME MACHINE - An entertainment button device includes: an entertainment button that a player can push; a button-up-and-down mechanism configured to move the entertainment button up and down from a predetermined normal operation position to a protruding position in which the entertainment button protrudes upward from the normal operation position; a stopper plate configured to hold the entertainment button in the protruding position; and a protruding position detector configured to detect the entertainment button being held by the stopper plate. | 06-06-2013 |
20130186218 | LINEAR ACTUATOR AND SAFETY MECHANISM FOR THE SAME - 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. | 07-25-2013 |
20130255413 | Stand-along automatic basket lift for fryers - The invention is a stand-alone automatic basket lift for deep fryers. The lift has an arm controlled by a timer. A standard basket 14×5×5 inch containing food is attached to the arm. Upon pushing the start button, the arm will lower the basket into the fryer and stay a predetermined time there frying the food. After the predetermined time elapses, the basket is lifted out of the deep fryer. The timer has six memories to store the predetermined time at user's desire. The predetermined time can be programmed to the accuracy of one second by the user. The maximum predetermined time is 99 minutes and the minimum is one second. Each lift is a stand-alone machine and can be installed at different positions relative to the fryer. For practical applications, two lifts are built into one unit. Three models for different installation positions are designed: side-installation model, back-installation model and top-installation model. | 10-03-2013 |
20130327168 | GEAR MOTOR HAVING SAFETY MECHANISM - A gear motor having a safety mechanism includes a motor body, a speed reduction mechanism, a transmission mechanism, and a touch switch. The speed reduction mechanism includes a worm and a worm wheel drivingly engaged with the worm. The transmission mechanism includes a base fixed to the speed reduction mechanism, a lead screw rod pivotally connected to the base and rotatably driven by the worm wheel, and a nut threadedly connected to the lead screw rod. The touch switch is electrically connected to the motor body and provided aside the lead screw rod, thereby stopping the motor body when the nut contacts the touch switch. Thus, the gear motor not only controls the operation of the driven mechanism, but also allows various driven mechanisms to be mounted thereon. The assembled volume of the gear motor and the driven mechanism is reduced. | 12-12-2013 |
20140202271 | AN ELECTROMOTIVE LINEAR DRIVE - An electromotive linear drive with a housing that is equipped with a drive unit, the output member of which is designed as linearly movable spindle nut that is operatively connected to a connecting part for connecting to another component. The spindle nut is engaged with the connecting part in the normal operating state by a first coupling part and a second coupling part engaged with said first coupling part, and the driving connection can be decoupled by a movement of at least one coupling part in the longitudinal direction of the spindle. | 07-24-2014 |
20140305238 | BALL SCREW ACTUATOR INCLUDING A COMPLIANT BALL SCREW STOP - An actuator includes a ball nut, a ball screw, and a ball screw stop. The ball nut is adapted to receive an input torque and in response rotates and supplies a drive force. The ball screw extends through the ball nut and has a first end and a second end. The ball screw receives the drive force from the ball nut and in response selectively translates between a retract position and a extend position. The ball screw stop is mounted on the ball screw proximate the first end to translate therewith. The ball screw stop engages the ball nut when the ball screw is in the extend position, translates, with compliance, a predetermined distance toward the first end upon engaging the ball nut, and prevents further rotation of the ball screw upon translating the predetermined distance. | 10-16-2014 |
20140338481 | Lead Screw Locking Mechanism - A method and apparatus for locking an externally threaded member in place. An apparatus comprises a number of internally threaded members and a shape memory element associated with the number of internally threaded members. The number of internally threaded members is configured to engage the externally threaded member. Changing a baseline shape of the shape memory element to a modified shape either prevents or allows movement of the number of internally threaded members relative to the externally threaded member. | 11-20-2014 |
20150323049 | LINEAR ACTUATOR FOR MOTION SIMULATOR - A linear actuator comprises a motor having an output. An end block is connected to a casing and to the motor and has a counterbore at a distal end with a bearing seated and retained in the counterbore. A coupling assembly couples the output shaft of the motor to a threaded shaft for transmission of the rotational output to the threaded shaft. A sliding tube is in sliding arrangement with the inner cavity of the casing for moving in translation relative to the casing. | 11-12-2015 |
20150367752 | APPARATUS FOR MOVING MOTOR-OPERATED SEAT RAIL - An apparatus for moving a motor-operated seat rail, including a lead screw provided along an axial direction of a fixed rail, a mounting bracket having opposite ends combined with a moving rail, with the lead screw passing through a central portion of the mounting bracket so that the bracket moves along the lead screw, and a spindle nut engaged with the lead screw through a screw type engagement. A first end of the spindle nut is rotatably held on the mounting bracket so as to rotate relative to the bracket, and a second end passes through the central portion of the mounting bracket and extends along an axial direction of the lead screw, and being configured such that the inner diameter of the second end is able to be elastically reduced so that the inner circumferential surface of the second end comes into close contact with the outer circumferential surface of the lead screw. | 12-24-2015 |
20160146317 | STRUCTURE OF LINEAR ACTUATOR - An improved structure of linear actuator includes an actuator including a gear set having a friction portion located at the periphery of the gear shaft of a driven gear thereof, a one-way bearing mounted on the gear shaft for rubbing against the friction portion to brake the driven gear from reverse rotation, a driver for driving the gear set and a transmission mechanism including a lead screw coaxially coupled to and rotatable by the gear shaft of the driven gear and a retractable tube assembly coupled to the lead screw and movable by the lead screw between an extended position and a received position, and a stopping mechanism including a thrust bearing coupled to the gear shaft of the driven gear and stoppable against an inner race of the one-way bearing inner race to bear an axial thrust load. | 05-26-2016 |
20160201775 | LOW FRICTION TRAVEL LIMITING STOP MODULE FOR A ROTATIONAL DRIVE SYSTEM | 07-14-2016 |