Class / Patent application number | Description | Number of patent applications / Date published |
074424890 | Non-recirculating rolling elements | 24 |
20080196529 | Planetary Device for Conversion Between Rotary Motion and Linear Motion - An object of the present invention is to perform motion conversion between a rotary motion and a linear motion accurately, stably, and efficiently with a relatively simple structure through combination of aplanetary gear mechanism of helical gears and a planetary gear mechanism of screw gears. A sun shaft | 08-21-2008 |
20090114048 | Rotation/linear motion converting mechanism - A rotation/linear motion converting mechanism includes a shaft | 05-07-2009 |
20090114049 | DEVICE FOR CONVERTING A ROTARY MOTION INTO A LINEAR MOTION - The invention is a device ( | 05-07-2009 |
20100058885 | MOTION GUIDE DEVICE - A motion guide device is provided which comprises a chain of rollers in which retainers are interposed, in which the chain of rollers is given a degree of freedom of rotation. The motion guide device comprises a track member ( | 03-11-2010 |
20110197693 | SCREW-TYPE GEAR AND METHOD OF ITS MANUFACTURING - The inventions relate to mechanical engineering, in particular to screw-type gears with rolling elements. The technical result of the proposed device and method consists in reducing the mass and overall dimensions of a gear and increasing the operational reliability and service life thereof. The essence of the invention is that one of the gear parts, either a screw or a nut, is made of two coaxial sections with curved end faces, and that a part of a rolling path is formed on each of the curved end faces. The coaxial sections are disposed so that the curved end faces thereof are arranged opposite one another with a clearance and the rolling elements are encompassed by both parts of the rolling path. The clearance in the gear is selected by pressing one coaxial section against the other in the axial direction. The method for producing the gear involves cutting either the screw or the nut into two coaxial sections along a curved trajectory that passes along the trajectory of the rolling path of the part to be cut. During assembly, the rolling elements are arranged along the cutting line between the sections of the cut part and the above-mentioned coaxial sections are tied along the axis of rotation of the screw or the nut with the aim of selecting the axial clearance in the screw-type gear. | 08-18-2011 |
20120192668 | DEFLECTOR FOR BALL SCREW - A deflector for use in a ball screw is composed of a main body and a junction member connected with the main body to form a channel having a first guide groove and two second guide grooves formed at two opposite sides of the first guide groove. Each of the second guide grooves has two walls extending outward from the first guide groove. Each two of the walls have a conjunction formed therebetween. The vertical section of the channel can define an extending axis passing through centers of the two conjunctions. At least one of the walls of each second guide groove is not parallel to the extending axis. In light of the above features, the roller chain can avoid wear and tear to prolong its service life thereof. Besides, the mold for forming the deflector can be designed to be structurally subject to mold release, such that the production efficiency can be increased. | 08-02-2012 |
20160116033 | ACTUATOR - To provide an actuator with which side face covers can be easily attached and detached without damaging a top face cover, and workability is enhanced, and cost can be reduced without upsizing the actuator, by fastening and fixing the actuator to a base stand from above the actuator in a state in which the side face covers are removed. | 04-28-2016 |
074424900 | Captured sphere | 2 |
20090282940 | ROLLING ELEMENT SCREW DEVICE - A rolling element screw device is provided with a power transmission mechanism for moving a retainer ring | 11-19-2009 |
20110179896 | LEAD SCREW APPARATUS, LINEAR ACTUATOR, AND LIFT APPARATUS - A lead screw apparatus includes a screw shaft having a spiral channel on an outer circumferential surface thereof, a plurality of rollers rotatable with contact with the spiral channel, and a cage rotatably supporting the rollers for conversion between relative rotation and linear motions between the screw shaft and the cage bi-directionally. The lead screw apparatus further includes a bearing and a holder 6 supported by the case for supporting the bearing. An inner ring of the bearing and the roller are integrally formed. An outer ring of the bearing has a protrusion on an outer circumferential surface thereof on a side closer to the screw shaft. Rollers of the bearing having a circular truncated cone shape are disposed in the bearing in a circumferential direction with substantially no gap. The outer ring has a thread part to shift the bearing and the roller. | 07-28-2011 |
074424910 | Cylindrical or quasi-cylindrical roller element (e.g., inclined roller, etc.) | 15 |
20090013812 | Roller Screw Structure - A roller screw structure comprises a nut, a screw and a rolling assembly. The rolling assembly is movably disposed between the nut and the screw and includes at least one rolling cone. The slantwise rolling surface of the rolling cone contacts the spiral groove surfaces of the nut and the screw in a line-to-line manner, and the angle between the rolling surface and the self-rotation axis of the rolling cone is from 0 degree to 6.3 degrees. Thereby, making the distance between the self-rotation axis and the rolling surface of the rolling cone of the rolling assembly different can prevent the occurrence of speed difference caused at different rolling paths of the rolling assembly. | 01-15-2009 |
20090249912 | ROLLER SCREW - The present invention provides a roller screw capable of circulating rollers smoothly. | 10-08-2009 |
20090301246 | SCREW DEVICE AND METHOD OF MANUFACTURING THE SAME - The present invention provides a screw device which takes a heavy load in one direction along the axis of the screw shaft and only a light load in the opposite direction, the screw device capable of providing ease of control of preloading. | 12-10-2009 |
20140338487 | ROLLER SCREW - In a roller screw ( | 11-20-2014 |
20160123446 | METHOD FOR PRODUCING A PLANETARY SCREW DRIVE AND KIT FOR CARRYING OUT THE METHOD - A method for producing a planetary screw drive and a kit for carrying out the method, in which a number of basic planetary roller sets composed of mutually dissimilar basic planetary rollers having different groove profiles ( | 05-05-2016 |
074424920 | Parallel to shaft | 9 |
20080282825 | Ball screw and method for displacing a threaded spindle in a ball screw - A ball screw comprising a threaded nut with thread channels for rolling bodies, a threaded spindle with thread channels for rolling bodies, and an intermediate bush, which is arranged between the threaded nut and the threaded spindle, wherein the intermediate bush has thread channels, which face the threaded nut and are adapted to the thread channels of the threaded nut, and rolling bodies are guided in these thread channels, and wherein the intermediate bush has thread channels, which face the threaded spindle and are adapted to its thread channels, and rolling bodies are guided in these thread channels, is proposed, wherein a first threaded arrangement, which is formed by means of the thread channels of the threaded nut and the intermediate bush facing one another, and a second threaded arrangement, which is formed by means of the thread channels of the intermediate bush and the threaded spindle facing one another, operate in opposite directions. | 11-20-2008 |
20100269616 | Rotolinear Actuator with Satellite Rollers - The invention relates to a rotolinear actuator that comprises: a central rod having an outer thread and surrounded by a ring with an inner thread, and threaded satellite rollers distributed between the central rod and the outer ring engaged with the threaded faces thereof. The actuator includes means for dispensing by capillarity a liquid lubricant at at least one contact area of at least one satellite roller with the central rod and with the outer ring, wherein the lubricant is economically dispensed by capillarity in an amount that is just sufficient and precisely at the contact locations of the interacting members, from a tank that may be sufficient for the lifetime of the actuator. | 10-28-2010 |
20110072928 | Mechanism for Converting Rotary Motion into Linear Motion - Upon assembly of a mechanism for converting rotary motion into linear motion, since a plurality of rollers are different from one another in the tilt direction with respect to a holder, a difficulty occurs in fixing one end sides thereof to the holder and thereafter making fixation for the other end sides. | 03-31-2011 |
20120167703 | Roller element for ball screw device - A motion guide device or ball screw device includes a ball nut attached onto a shaft and having helical grooves for forming a ball guiding raceway between the ball nut and the elongated shaft, and a number of roller bearing elements received and engaged with the roller guiding raceway of the ball nut and the elongated shaft, and the roller bearing elements each include two or more bearing members disposed side by side relative to each other, one of the bearing members includes a coupling member or shaft for engaging with the other bearing member and for pivotally coupling the bearing members together, the bearing members include one or more depressions for receiving a lubricating oil or the like. | 07-05-2012 |
20120204665 | Differential Roller Screw - A differential roller screw comprises an outer nut, and rolling elements comprising a first set of rollers equipped with first grooves, the first set being arranged in a first cylindrical ring around the screw. The screw comprises a second set of rollers equipped with second grooves. The second set is arranged in a second cylindrical ring. The two cylindrical rings are coaxial. An intermediate cylindrical element is arranged between the two sets of rollers, the intermediate element comprising a first internal thread formed with a first pitch and having a first direction and a second external thread formed with a second pitch and having a second direction opposite the first direction. | 08-16-2012 |
20130068059 | NUT OF A PLANETARY ROLLER SCREW DRIVE, AND METHOD FOR PRODUCING SUCH A NUT | 03-21-2013 |
20160053874 | ROLLER SCREW MECHANISM - A roller screw mechanism comprising a screw, provided with an outer thread, a nut positioned around and coaxially to the screw, the nut being provided with an inner thread, and a plurality of rollers inserted between the screw and the nut, each comprising an outer thread engaged with the outer thread of the screw and with the inner thread of the nut. Each of the threads of the screw, rollers and nut comprise first and second axially opposite flanks, respectively forming a first and second angle with a plane perpendicular to the central axis of the screw, the first and second flanks of each thread of the rollers respectively being in contact with the first and second flanks of the nut's thread and with the first and second flanks of the screw's thread. The value of the first angle is different from the value of the second angle. | 02-25-2016 |
20160091067 | ROLLER SCREW MECHANISM AND ASSOCIATED MANUFACTURING METHOD - A roller screw mechanism comprises a screw having an outer thread and a nut disposed around and coaxially with the screw. The nut comprises an inner thread. A plurality of rollers are disposed radially between the screw and the nut; each roller being provided with an outer thread engaged with the outer and inner threads of the screw and of the nut and with two outer gear teeth. The mechanism also comprises two synchronizing gear teeth that are each engaged with one of the gear teeth of the rollers. An outside diameter of each gear teeth of each roller is less than a diameter of a root of the thread of the roller. Each tooth of the gear teeth of the rollers comprises planar faces that engage with the synchronizing gear teeth. | 03-31-2016 |
20160091068 | ROLLER SCREW MECHANISM WITH INTEGRATED RING GEARS AND ASSOCIATED MANUFACTURING METHOD - A roller screw mechanism comprising a screw having an outer thread, a nut disposed around and coaxially with the screw. The nut includes an inner thread. A plurality of rollers are disposed radially between the screw and the nut and are each provided with an outer thread engaged with the outer and inner threads of the screw and of the nut and with two outer gear teeth. The mechanism additionally comprises two synchronizing gear teeth that are formed on the nut and are each engaged with one of the gear teeth of the rollers. The root diameter of each gear teeth is less than the inside diameter of the inner thread of the nut. | 03-31-2016 |
074424930 | Perpendicular to shaft | 1 |
20110232407 | HELICAL GEARING - The invention relates to helical gearing having a spindle and a counterpart, which engages on a thread of the spindle. The counterpart is, for example, tube-shaped, encloses the spindle concentrically, and has rollers on the inside of the counterpart which roll on thread flanks of the thread. By rotation of the spindle, the counterpart is driven like the nut of a spindle drive. The thread of the helical gearing according to the invention is provided with a changing pitch and thus a changing gear ratio. | 09-29-2011 |