A rolling bearing provides an inner ring and an outer ring concentrically about a rotation axis X-X′ running in an axial direction, and at least first and second axial bearings each axially disposed between the inner ring and the outer ring and each having at least one row of rolling elements, the first and second axial bearings being spaced apart from each other in the axial direction. The rolling bearing further provides only one radial bearing radially disposed between the inner ring and the outer ring and having at least one row of rolling elements. The radial bearing is disposed between an outer raceway located on the inner ring and an inner raceway located on the outer ring.

A cage includes: a first holding portion in which a plurality of radial rollers is held; a second holding portion in which a plurality of thrust rollers is held; and a connecting portion via which the first holding portion is connected to the second holding portion. The first holding portion, the second holding portion, and the connecting portion are molded integrally by a resin member.

A rolling bearing including an inner ring, an outer ring and a middle ring, the rings being concentrically arranged around a central axis so that the middle ring is arranged radially between the inner ring and the outer ring, at least one row of rolling elements interposed between the inner ring and the middle ring, at least one row of rolling elements interposed between the middle ring and the outer ring. The inner ring provides a radially inner circumferential portion with a gear toothing and the outer ring having a radially outer circumferential portion with a gear toothing.

An open-centered large rolling bearing having two concentric bearing rings, which are supported against one another in the axial direction of the rolling bearing by means of at least two axial bearings, which are arranged on opposite end faces of a bearing ring. In the radial direction, the bearing rings are supported against one another by at least three radial bearings, which are arranged on inner and outer circumferential sides of a bearing ring.

A rolling bearing includes first and second rings each having an axial raceway and a radial raceway and axial rolling elements between the radial raceways and radial rolling elements between the axial raceways, the second ring having a protruding nose extending into an annular groove of the first ring, the nose having an axial cylindrical surface that forms the axial raceway of the second ring. Also at least one ultrasonic distance sensor mounted on the first ring in radial contact with the axial cylindrical surface of the nose and configured to emit radiation in a main radiation direction oriented towards a surface of the second ring that is inclined relative to a rotation axis of the rolling bearing.

The bearing provides an outer ring and an inner ring capable of rotating concentrically relative to one another. At least one of the inner and outer rings are split into a plurality of successive circumferential ring segments. Each pair of adjacent successive ring segments of the split-ring is secured together with at least one fixing plate. The fixing plate is disposed inside a first groove disposed on one of the ring segments and a second groove 38 disposed on the other ring segment. The fixing plate is set back or flush with at least the surface of each of the ring segments from which the first or second groove is formed.

A rotation transmission device is provided which includes, in its housing, an electromagnetic clutch, and a two-way clutch by which a first shaft and a second shaft are selectively engaged with, and disengaged from, each other. A rolling bearing is disposed at one axial end of the housing, and supports the second shaft and the housing. Locking arrangements prevent relative axial movement between the second shaft and the rolling bearing, and between the rolling bearing and the housing. A movement restricting arrangement is disposed at the other axial end of the housing, and restricting movement of the electromagnetic clutch toward the other axial end of the housing.

A rolling bearing provides an inner ring and an outer ring concentrically about a rotation axis X-X running in an axial direction, and at least first and second axial bearings each axially disposed between the inner ring and the outer ring and each having at least one row of rolling elements, the first and second axial bearings being spaced apart from each other in the axial direction. The rolling bearing further provides only one radial bearing radially disposed between the inner ring and the outer ring and having at least one row of rolling elements. The radial bearing is disposed between an outer raceway located on the inner ring and an inner raceway located on the outer ring.

A bearing arrangement for a fluid machinery application employing an axially locating bearing. The axially locating bearing includes: a first angular self-aligning contact bearing arranged next to a second angular self-aligning contact bearing. Each of the first angular self-aligning contact bearing and the second angular self-aligning contact bearing includes a set of rolling elements arranged in a row and interposed between a respective curved inner raceway and an associated curved outer raceway. Each roller is a symmetrical cylindrically-shaped roller having a curved raceway-contacting surface. Each roller is inclined respective to the axial direction of the shaft by a respective contact angle. The rollers support an axial force and a radial force. The axially non-locating bearing position is arranged spaced apart from the axially locating bearing position, as seen in the axial direction. Examples of fluid machinery applications include: a wind turbine, water turbine or a propulsion turbine.

A mud-lubricated bearing section including a seal assembly for directing a fluid flowing through a mud-lubricated bearing into a central bore of a mandrel. At least one mud-lubricated bearing is positioned in an annular space between the mandrel and a housing. The seal assembly directs the fluid from the annular space through a mandrel fluid port into the mandrel central bore. The seal assembly seals the annular space, and includes a piston, a plug, and a chamber between the piston and the plug. The piston is configured for axial movement relative to the mandrel and the housing, while the plug is axially fixed relative to the mandrel and/or the housing. The chamber is configured to contain a lubricating fluid. The piston includes inner and outer seals. The plug includes a lower seal and a passage allowing the fluid from the chamber to reach the lower seal for lubrication.