Class / Patent application number | Description | Number of patent applications / Date published |
074424830 | Plural independent recirculating element paths | 11 |
20090249910 | LEAD SCREW DEVICE - A lead screw device including a lead screw shaft extending along a longitudinal axis having a lead screw thread portion, and a coupling structure at a proximal end of the lead screw shaft. The coupling structure can have a male securement thread and a female securement thread positioned along the longitudinal axis. The female securement thread can extend within the coupling structure at the proximal end of the lead screw shaft. The coupling structure can provide opposed axial threaded securement to a rotatable shaft along the longitudinal axis from opposing axial directions. | 10-08-2009 |
20100107794 | Circulating device for motion guide apparatus - A motion guide device includes a ball nut attached onto a shaft and having helical grooves for receiving ball bearing elements, a tubular member is engaged with the ball nut and includes a ball circulating pathway communicative with the helical groove of the ball nut, and includes an intermediate segment, two curved segments, and two end coupling segments each having a ball guiding channel which includes a wider inner section for guiding and circulating the flexible coupling member of a ball coupler to smoothly move through the ball guiding channel of each end coupling segment and for preventing the flexible coupling member from being twisted. The tubular member is preferably formed by two half members. | 05-06-2010 |
20100122596 | Ball Screw - A ball screw comprises a screw, a nut, two return assemblies and a rolling assembly. The two return assemblies are disposed in two ends of the nut, and each of the return assemblies is defined with a return passage provided with two guiding grooves at two sides thereof for guiding the linking portions of the rolling assembly. The guiding grooves twist an angle of about 90 degrees within the return portion of each of the return assemblies to prevent the linking portions from being stretched or extruded improperly to reduce the deformation to the lowest, thus effectively extending the service life of the rolling assembly. | 05-20-2010 |
20100170359 | Ball return device for ball screw device - A ball screw device includes a screw engaged into a nut member for forming an endless ball guiding passage and for receiving a number of ball bearing members, a ball return device includes a U-shaped structure having a central carrying member and a protrusion extended out from each end for engaging into the nut member and for increasing the curvature of the ball return pathway of the ball return device, and a return device holder engaged with the protrusions of the ball return device for retaining the ball return device to the nut member and for preventing the ball return device from moving laterally relative to the nut member and for suitably guiding the ball bearing members to smoothly move through the endless ball guiding passages of the ball screw device. | 07-08-2010 |
20100236345 | ROLLING BODY SCREW DEVICE - There is provided a new rolling body screw device manufactured with cheap cost without degrading quality in comparison with a conventional device even for a device having any large dimension in an end-cap type rolling body screw device. The rolling body screw device includes the direction changing passages | 09-23-2010 |
20100242651 | ROLLING-ELEMENT SCREW DEVICE - Provided is a rolling-element screw device in which a recess can be easily formed in an outer diameter portion of a nut main body for receiving a circulation member. At both ends of a straight passage | 09-30-2010 |
20110138949 | Linear Actuator with Ball Bearing Spline - A linear actuator includes a ball screw, the ball screw configured to rotate; a nut engaged with the ball screw, the nut configured to translate linearly in response to the rotation of the ball screw; and a ball bearing spline integrated into the nut, the ball bearing spline comprising a plurality of ball bearings, wherein the ball bearing spline is configured to react a torque from the rotation of the ball screw. A ball bearing spline is integrated into a translating nut of a linear actuator, the ball bearing spline comprising a plurality of ball bearings, wherein the ball bearing spline is configured to react a torque from a rotation of a ball screw engaged with the translating nut. | 06-16-2011 |
20110303036 | Ball return device for ball screw device - A ball screw device includes a screw engaged into a nut member for forming an endless ball guiding passage and for receiving a number of ball bearing members, a ball return device includes a U-shaped structure having a central carrying member and a protrusion extended out from each end for engaging into the nut member and for increasing the curvature of the ball return pathway of the ball return device, and a return device holder engaged with the protrusions of the ball return device for retaining the ball return device to the nut member and for preventing the ball return device from moving laterally relative to the nut member and for suitably guiding the ball bearing members to smoothly move through the endless ball guiding passages of the ball screw device. | 12-15-2011 |
20120240706 | Ball Screw - A ball return channel of a ball screw is formed within a nut and a ring-shaped non-contact seal is arranged at the axial both ends of the nut. A suction hole radially penetrating the nut is formed within the range of a raceway (a rolling channel formed by a spiral groove of the nut and a spiral groove of the screw shaft). This guarantees not to emit dust produced inside the nut, and attains dust reduction effect higher than that of the conventional ball screw. | 09-27-2012 |
20130031995 | BALL SCREW - A ball screw includes a screw shaft formed with two helical raceways that have the same lead and the same thread angle, a ball nut rotatably sleeved on the screw shaft and formed with two ball grooves that correspond to and complement with the helical raceways, a scraper has two contact parts to contact the two helical raceways, a plurality of bearing balls rollably and selectively disposable between one of the ball grooves and the corresponding helical raceway, and a return unit including two return tubes each having two ends respectively and spatially connected to two ends of the corresponding ball groove. | 02-07-2013 |
20140083224 | EXTERNAL CIRCULATION TYPE BALL SCREW DEVICE - The invention provides an external circulation type ball screw device comprising screw shaft and nut having first and second screw grooves. A circulation member comprises first leg, second leg and connection portion. The first leg comprises a first end surface having first inner and outer points, and the second leg comprises a second end surface having second inner and outer points; first and second entrances formed on the first and second end surfaces of circulation passage; first and second thickness respectively provided between the first entrance and the first inner and outer points thereof; the second thickness being greater than the first; the third and fourth thickness respectively provided between the second entrance and the second inner and outer points thereof; the fourth thickness being greater than the third. The groove wall of the second screw groove occupied and the occurrence of broken teeth of the nut are reduced. | 03-27-2014 |