Abstract: An elastic supporting body for each roller shaft and rollers of a skateboard, skates or the like, each supporting body including a pin extending downwardly at an angle from the mounting plate, with the remote end of the pin rigidly secured to the roller shaft, and thereby stiffening the supporting body along the axis of the pin, while still allowing the roller shaft to twist for altering the steering direction with weight shifts of the user.

Abstract: A clutch release structure includes a clutch release bearing having a running portion, or the like, positioned to axially engage the diaphragm or dish-shaped clutch release elements. The bearing portion, or the like, has an axially extending portion which projects through the central boring in the clutch release elements, and damping means are provided radially between this extension and the clutch release spring elements.

Abstract: In a longitudinally movable rolling bearing having a plurality of endless rows of spherical rolling elements, elongated races are provided for supporting loaded rolling elements against the inner boring of a housing. The radially directed surfaces of the rails are identical, so that the rails may be reversed to prolong the life of the bearing. In one embodiment, the rails are straight in the lengthwise direction, for use in a bearing in a precision machine. In another embodiment of the invention, the rails are convex curved in the lengthwise direction, for use in a bearing requiring compensation for misalignment of a shaft and the housing.

Abstract: A linear ball bearing having an outer shell and a cage which define between them a plurality of endless axial raceways filled with balls, has at each end an end ring having a shoulder extending radially outward for axially fixing the bearing in a housing bore. The end ring may be positioned and secured after the bearing shell and balls are situated in the housing. Alternatively, the shoulder may be formed of resilient tongues which are deflectable radially inwardly during insertion of the bearing shell into the housing bore, and which subsequently spring radially outwardly to engage the housing wall and secure the bearing in place.

Abstract: In a rolling bearing for linear movement with respect to a shaft, the bearing has a sleeve, and axially extending guide rails on the inner and outer surfaces of the sleeve. Rolling elements are guided by the guide rails, and have concave spool-like central portions matched to the shaft, to provide linear contact therewith. The ends of the rolling elements are convexly curved to match the curvature of the inner surface of the sleeve, so that the inner surface of the sleeve forms a raceway for rolling elements under load. Grooves are provided in the lateral surfaces of the guide rails for guiding balls disposed between the ends of adjacent rolling elements. End caps on the bearing have turn-around guides for directing rolling elements between the inner raceways and the raceways for unloaded rolling elements along the outer surfaces of the sleeve.

Abstract: A system for continuous lubrication of bearings in a drilling apparatus including a roller bit having at least one pivot and a cutting roller rotatably supported on the pivot by bearings. The system comprises pumping means in the form of spiral or oblique grooves on one of the spaced confronting faces of the roller bit and cutting roller and a flow opening or port arranged to effect flow of a flushing liquid through the bearing upon rotations of the cutting roller. The grooves may be selectively oriented to pump flushing liquid through the annular gap between the roller bit and cutting roller faces radially inwardly or radially outwardly for a given direction of rotation of the cutting roller.

Abstract: A clutch release bearing for use with a friction clutch for automotive vehicles having a ring-shaped spring release member. The clutch release bearing is formed as an anti-friction bearing wherein one of its race members has a portion extending axially away from the rolling bodies. The extending portion projects a distance sufficient to be inserted within the bore of the spring release member and to pass behind the rear wall and engage therewith. The race members of the bearing are made of sheet metal and are folded to provide substantially radial walls adapted to engage the front face of the spring release member or the clutch release actuating member. The projection of the one race member may be cylindrical or it may project as a ring-shaped body having slots forming resilient fingers interengaging with the arms of the spring release member.

Abstract: A system for lubricating bearings in a drilling apparatus including a roller bit with at least one pivot and a cutting roller rotatably supported on the pivot by bearings. A cavity or chamber is formed in the roller bit for a non-compressible flushing liquid. The flow channel which communicates with the chamber at one end and the bearing cavity at the other end, provides a flow path for the flushing liquid to the bearing cavity. In one form the flushing liquid discharges to the bearing cavity at a point remote from an annular gap between the outer axial end face of the cutting roller and the roller bit. In another embodiment circumferentially spaced discharge ports are located between the bearings so that a portion of the flushing liquid is discharged to the environment and the remainder flows through the bearings and out the annular gap.

Abstract: A ball bearing with a cylindrical ball cage intermediate a shaft and outer shell, and alternately spaced longitudinal load portions and ball-return paths in the bore of the shell, has additional longitudinal recesses in the bore for receiving with play a mating longitudinal rib on the cage, which permits restricted lateral and circumferential movement of the balls relative to the shell during longitudinal movement of these balls.

Abstract: A rolling bearing for lengthwise movement with respect to a shaft has a housing with a cage for guiding endless rows of rolling elements. Race rails extend axially in the housing for radially outwardly supporting rolling elements in the portions of the portions of the lengths of the rows thereof adapted to receive loads. The race rails have first sides with convex curvature in the axial direction, and second sides opposite the first sides that extend straight in the axial direction, the race rails being adapted to be assembled in the bearing with selected ones of the sides thereof being directed radially outwardly. Both sides of the race rails may have axially extending guide grooves.

Abstract: A bushing for journalling a shaft having a cage for retaining a plurality of bearing balls and an annular packing for sealing the space between one end of the cage and the shaft. The packing and the cage are formed with cooperating axial projections and recesses which form interengagements for securing the packing on the end of the cage.

Abstract: A linear-motion ball bearing assembly wherein a metal cylindrical shell has an inner bore surface defining load zones and outwardly spaced return passages for balls in endless raceways; the shell has outwardly extending longitudinal ribs, with plastic injection molded onto the bore of the shell to form guide walls for balls in the load zone and along the ribs of the shell to form return guide passages communicating with the load zone passages.

Abstract: A ball bearing comprising an outer sleeve with raceways formed therein, and having an axial bore and a retainer including a plurality of ball guideways distributed over the periphery thereof. The ball guideways comprise axial guideway sections and semicircular deflecting way sections connecting the axial guideway sections by pairs; the outer sleeve has a length which corresponds to the length of the axial guideway sections in the retainer, the retainer being made of synthetic material and projecting with the semicircular deflecting way sections beyond the outer sleeve; and end rings mounted on projecting sections of the retainer for covering the deflecting zone.

Abstract: A clutch release device for use with a thrust bearing has a sliding sleeve formed as a cylinder with a flange extending radially outward, and a transition shoulder between the cylinder and flange; a radially extending reference plane extends through said shoulder, and said flange has portions thereof displaced axially, with said reference plane being equidistant from said flange and said displaced portions.

Abstract: A linear motion ball bearing including an outer sleeve, a cylindrical ball-retaining cage within the sleeve with continuous raceways defined between the sleeve and cage, and a plurality of balls in these raceways, each raceway comprising a loaded axial race and a parallel unloaded return race, and two curved turn-around races connecting the axial races. The sleeve has, in the region adjacent each unloaded race, a longitudinal slot having a width greater than the diameter of the balls, and the cage having projections along the unloaded races for retaining balls from falling out of these races.

Abstract: A longitudinally movable bushing has a continuous raceway for endlessly circulating rolling elements, such as balls. The raceway has a portion for loaded balls, wherein the balls are externally exposed to engage a loading surface, and an unloaded portion joined at its ends to the loaded portion. The ends of the loaded raceway portion gradually widen, the widened portions having the same depth as the remainder of the portions.

Abstract: A linear motion ball bearing including an outer sleeve, a cylindrical ball-retaining cage within the sleeve, with continuous raceways defined between the sleeve and cage, and a plurality of balls in these raceways; the sleeve including, as part of each raceway, an axial return race defined by a slot. The cage has a corresponding and generally adjacent axial race, the cage, in an assembled bearing, being rotated about its central axis and displaced relative to the sleeve, so that balls in the axial race are engaged and retained by an edge of the slot.

Abstract: A clutch release device, particularly for motor vehicles, with a self-centering clutch thrust bearing, having a fixed bearing ring, and which is located with radial play with respect to a bearing support, and which has; a sliding sleeve forming the bearing support, an additional sleeve connected to the sliding sleeve, the fixed bearing ring nonrotatingly contacting a contact surface of the additional sleeve, means preventing the fixed bearing from rotating on the additional sleeve, the additional sleeve, at the area of contact with the contact surface, being offset in a direction toward the clutch thrust bearing, the additional sleeve, in the offset, having at least two diametrically opposed recesses for engaging fixed means located on the periphery of the fixed bearing ring for protecting the clutch release bearing from rotation with respect to the bearing support.

Abstract: A siding collar is provided for a fork-activated coupling clutch release bearing, including a collar body with a cast-in wear-resistant disc formed on a radial flange. A plurality of contact zones on one side of the disc contact the fork. On the bearing side of the disc the nonrotating bearing ring contacts the disc, the disc having a plurality of guide zones running essentially axially along the edge, with means for securing this bearing ring to the collar having guide zones for holding this bearing ring on the sliding collar against rotation on the sliding collar.

Abstract: An axially movable ball bearing includes a cage having a plurality of circumferentially distributed guideways, each guideway including first and second axially extending channels joined at their ends by semi-circular sections. A plurality of balls are provided in each of the guideways. The first channels are open radially inwardly so that the balls therein may engage a shaft along which the bearing is adapted to move. A thin-walled metal housing is tightly fitted over the cage, and has bridge sections aligned with the first channels. The bridge sections have on their radially inner surfaces, guide courses for engaging the balls in the first channels. The housing is slotted between the bridge sections, so that the second channels project radially outwardly between the bridge sections. The bridge sections are joined together at each axial end of the bearing by end rings. The metal housing has a greater hardness in the region of the courses of the bridge sections than in the other regions thereof.