| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 074890350 | Plural screws in series (e.g., telescoping, etc.) | 16 |
| 20080257081 | TELESCOPIC ACTUATOR - A telescopic actuator includes a motor, an input flange rotated by the motor, a male screw member coupled to the input flange, a female screw member threadedly engaged with the male screw member, an output rod coupled to the female screw member, the output rod being moved in an axial direction thereof to output a thrust force when the input flange is rotated, and a housing inside which the male screw member and the female screw member are accommodated. The input flange is supported by the housing such that a relative movement of the input flange with respect to the housing is allowed in a radial direction but restricted in the axial direction. | 10-23-2008 |
| 20090095099 | SPEED CHANGE MECHANISM AND ROTARY ACTUATOR - A rotary actuator | 04-16-2009 |
| 20090107269 | TELESCOPING LINEAR ACTUATOR - 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. | 04-30-2009 |
| 20090158871 | Driving Device for an Extendible and Retractable Actuator - A driving device for an extendible and retractable actuator comprises a first rod, a second rod, a third rod and a motor. The first rod is screwed with the second rod. The second rod is screwed with the third rod. By such arrangements, the motor can drive the first and the second rods to move while driving the third rod to rotate. After the third rod is engaged with the second rod, the first rod can be also driven to move. | 06-25-2009 |
| 20100018334 | TELESCOPING DUAL-SPINDLE DRIVE - 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. | 01-28-2010 |
| 20100071490 | TELESCOPIC ACTUATOR WITH A MAIN ROD AND AN AUXILIARY ROD - The present invention relates to a telescopic actuator comprising a cylinder | 03-25-2010 |
| 20100192715 | MULTIPLE-ACTING LINEAR ACTUATOR - The present invention relates to a multiple-acting linear actuator ( | 08-05-2010 |
| 20120055277 | LINEAR ACTUATOR AND SAFETY MECHANISM FOR THE SAME - 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. | 03-08-2012 |
| 20140013878 | LINEAR ACTUATOR AND HEIGHT-ADJUSTABLE TABLE - A linear actuator comprises a drive unit housing ( | 01-16-2014 |
| 20140020488 | LINEAR ACTUATOR AND METHOD FOR PRODUCING A LINEAR ACTUATOR - A linear actuator comprising a spindle-based linear drive ( | 01-23-2014 |
| 20140290403 | DUAL-SCREW LINEAR ACTUATOR - 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. | 10-02-2014 |
| 20150075306 | TELESCOPING LINEAR ACTUATOR WITH SCREW DRIVES - A linear actuator ( | 03-19-2015 |
| 20160010731 | ACTUATOR | 01-14-2016 |
| 20160047446 | DUAL-SCREW LINEAR ACTUATOR - A dual-screw linear actuator includes a power drive unit including a gear set mounted in a holder frame thereof and a driver for rotating the gear set, a transmission mechanism including a sleeve coupled to and rotatable by the gear set, a tubular linkage rod mounted in and rotatable by the sleeve and having a first threaded connection portion and a second threaded connection portion respectively located at two opposite ends thereof, a first lead screw threaded into the first threaded connection portion and affixed to the holder frame for guiding movement of the tubular linkage rod forwardly/backwardly relative to the first lead screw upon rotation of the tubular linkage rod and a second lead screw threaded into the second threaded connection portion and movable forwardly/backwardly relative to the tubular linkage rod upon rotation of the tubular linkage rod. | 02-18-2016 |
| 20160146318 | ACTUATOR - An actuator for driving a rotatable component includes a first, rotating member comprising a screw and a second member comprising a nut threaded to said screw, wherein rotation of said first member causes axial movement of said first or second member. The component also includes a third member coupled to the second member, wherein axial movement of said first or second member causes axial movement of said third member and a fourth, rotating member coupled to said third member and connectable to said component. The system also includes a bearing system located between said third member and said fourth member, said bearing system configured to cause said fourth member to rotate upon said axial movement of said third member so as to drive said component. | 05-26-2016 |
| 20160153532 | SPINDLE DRIVE FOR AN ADJUSTING ELEMENT OF A MOTOR VEHICLE | 06-02-2016 |
