Abstract: A device for convening rotational motion of a threaded shaft to linear motion in parallelism with the shaft and having a high load carrying capacity and operating efficiencies that are on the order of 98 percent (98%), with the device including a roller bearing nut for the shaft that is arranged to provide a linear motion unit (for the device) and a housing annular structure arranged to be fixed from rotation and including a plurality of circularly and concavely shaped thrust teeth of essentially "V" configuration 360 degrees (360.degree.

Abstract: A hand brake for railroad cars comprising a winding drum journaled within its housing to be in concentric relation with the hand brake operating shaft. A brake chain wind up and let out control mechanism is interposed between the brake drum and the operating shaft, with the winding drum being journaled between a pair of annular bearing plates that are concentric with the shaft and fixed to the housing in spaced apart relation to receive the winding drum. The shaft is coupled to the winding drum by a sun and planetary gear reducer mechanism in which a plurality of planetary gear assemblies are mounted on one or more circular lands concentric with the operating shaft for free rolling non-journaled orbiting movement about the sun gear that is keyed to the operating shaft for rotation by same to effect wind up and let up of the brake chain. The sun and planetary gear mechanism has its parts oriented to provide a central drive input and output with balanced internal force applying and resisting characteristics.

Abstract: A linear actuator of the threaded shaft actuator type comprising a rotary threaded shaft and a special bearing unit secured to the member to be moved linearly, in which the bearing unit comprises a plurality of rollers each having a plurality of radial right flanges intermediate their ends spaced apart and scheduled to complement the pitch of the shaft threading for rolling engagement herewith, which rollers at their ends are formed with thrust bearing surfaces that are angled relative to their axes that ride on spaced apart annular raceways defined by an outer race structure which in turn is secured to the member to be moved linearly. The roller flanges are formed with thrust transmitting faces angled with respect to the longitudinal axes of the respective rollers and shaped to substantially complement the shaft threading.

Abstract: An antifriction roller bearing having a bearing assembly comprising an outer race, an inner race, and rolling bearings interposed between said races, in which assembly the rolling bearings each comprise a roller having its ends in thrust load transmitting engagement with the outer race, which rollers are also in thrust and load transmitting relation to the inner race intermediate the ends of said rollers by way of right grooves and flanges formed in both the rollers and inner race, which are in substantially complemental interfitting relation. The area of engagement of said rollers with said inner race at least equals the area of engagement of said rollers with the outer race. The rollers have their thrust transmitting surfaces that engage corresponding surfaces of the outer race, and their thrust transmitting surfaces that engage corresponding surfaces of the inner race, angled with respect to the longitudinal axes of the respective rollers.

Abstract: A linear actuator of the threaded shaft actuator type comprising a rotary threaded shaft and a special bearing unit secured to the member to be moved linearly, in which the bearing unit comprises a plurality of rollers each having a plurality of radial right flanges intermediate their ends spaced apart and scheduled to complement the pitch of the shaft threading for rolling engagement therewith, which rollers at their ends are formed with bearing surfaces that are oblique relative to their axes that ride in spaced apart raceways defined by an outer race structure which in turn is secured to the member to be moved linearly.

Abstract: A linear actuator of the threaded shaft actuator type comprising a rotary threaded shaft and a special bearing unit secured to the member to be moved linearly, in which the bearing unit comprises a plurality of rollers each having a plurality of radial right flanges intermediate their ends spaced apart and scheduled to complement the pitch of the shaft threading for rolling engagement herewith, which rollers at their ends are formed with bearing surfaces that are oblique relative to their axes that ride on spaced apart raceways defined by an outer race structure which in turn is secured to the member to be moved linearly.

Abstract: An antifriction roller bearing having a bearing assembly comprising an outer race, an inner race, and rolling bearings interposed between said races, in which assembly the rolling bearings each comprise a roller having its ends in thrust and load transmitting engagement with the outer race, which rollers are also in thrust and load transmitting relation to the inner race intermediate the ends of said rollers. The area of engagement of said rollers with said inner race at least equals the area of engagement of said rollers with the outer race.