A rotation induction device for a vehicle includes: an upper case formed of a synthetic resin material, and having a piston rod passing therethrough; a lower case formed of a synthetic resin material and disposed under the upper case, wherein the piston rod passes through the lower case; a center plate formed of a synthetic resin material, disposed between the upper case and the lower case such that the piston rod passes through the center plate, and configured to induce rotation of either one or both of the upper case and the lower case; and a ring-shaped installation space disposed between the upper and lower cases, wherein the center plate is inserted in the ring-shaped installation space.

A fluid machine includes a rotating body, an operation body rotated integrally with the rotating body, a housing, hydrodynamic plain bearings rotatably supporting the rotating body relative to the housing, and a cooling passage arranged in the housing. The hydrodynamic plain bearings each include a resin coating layer at a portion that is opposed to the rotating body. The hydrodynamic plain bearings include at least one combination of hydrodynamic plain bearings. Each combination includes an upstream hydrodynamic plain bearing and a downstream hydrodynamic plain bearing located at different positions in a direction in which the fluid flows through the cooling passage. The coating layer of the upstream hydrodynamic plain bearing has a lower hardness than the coating layer of the downstream hydrodynamic plain bearing.

A sliding material including: a substrate, and a textured sliding layer overlying the substrate, where the sliding layer includes asperities including a plurality of apexes and nadirs, where 1) the sliding layer has a root mean square gradient of less than 0.064; 2) the sliding layer has an apex material portion of less than 10%; 3) the sliding layer has a nadir material portion of less than 75%, and where the textured sliding layer induces formation of a film when engaged in a rotational interface w/ another component.

A rotation induction device for a vehicle, includes an upper case member, a lower case member, a center plate, and an inflow prevention part. The upper case member has a piston rod disposed therethrough. The lower case member, disposed under the upper case member, has the piston rod disposed therethrough. The center plate, disposed between the upper and lower case members such that the piston rod passes through the center plate, is configured to induce either one or both of the upper and lower case members to rotate. The inflow prevention part, formed in the upper and lower case members, is configured to block the inflow of foreign matters. Each of the upper case member, the lower case member, and the center plate is composed of a synthetic resin material.

A rotation induction device for a vehicle, includes an upper case member, a lower case member, a center plate, and an inflow prevention part. The upper case member has a piston rod disposed therethrough. The lower case member, disposed under the upper case member, has the piston rod disposed therethrough. The center plate, disposed between the upper and lower case members such that the piston rod passes through the center plate, is configured to induce either one or both of the upper and lower case members to rotate. The inflow prevention part, formed in the upper and lower case members, is configured to block the inflow of foreign matters. Each of the upper case member, the lower case member, and the center plate is composed of a synthetic resin material.

A rotation induction device for a vehicle includes an upper case member, a lower case member, a center plate, and a lubricant storage part. The upper case member has a piston rod disposed therethrough. The lower case member, disposed under the upper case member, has the piston rod disposed therethrough. The center plate, disposed between the upper and lower case members such that the piston rod passes through the center plate, is configured to induce either one or both of the upper and lower case members to rotate. The lubricant storage part is formed in the center plate and configured to store lubricant therein. Each of the upper case member, the lower case member, and the center plate is composed of a synthetic resin material.

A rotation induction device for a vehicle includes an upper case member, a lower case member, a center plate, and a lubricant storage part. The upper case member has a piston rod disposed therethrough. The lower case member, disposed under the upper case member, has the piston rod disposed therethrough. The center plate, disposed between the upper and lower case members such that the piston rod passes through the center plate, is configured to induce either one or both of the upper and lower case members to rotate. The lubricant storage part is formed in the center plate and configured to store lubricant therein. Each of the upper case member, the lower case member, and the center plate is composed of a synthetic resin material.

An object of the present invention is to provide a technique capable of realizing good wear resistance with a simple structure. A sliding member and a sliding bearing each include a base layer and a coating layer formed on the base layer, the coating layer having a sliding surface with a counterpart member. The base layer is formed of a hard material that is harder than the coating layer, and the average concentration of a diffusion component of the hard material diffused from the base layer is 4 wt % or more in an evaluation range, in the coating layer, in which the distance from an interface with the base layer is 1 μm or more and 2 μm or less.

A bearing includes: an annular main body through which a shaft is inserted; a plurality of oil supply grooves included on an inner curved surface of the main body and extending in an axial direction of the main body; a thrust bearing surface included on an end surface of the main body; a plurality of tapered portions included on the thrust bearing surface separated from an outer peripheral edge of the thrust bearing surface at intervals in a circumferential direction of the main body and communicating with the oil supply grooves, the tapered portions each becoming shallower as it extends in the circumferential direction; and an oil discharge groove included on the thrust bearing surface, passing through one tapered portion among the plurality of tapered portions, and connecting an oil supply groove and the outer peripheral edge.

Bearing assemblies that include a plurality of polycrystalline diamond (“PCD”) bearing elements, bearing apparatuses including such bearing assemblies, and methods of operating and fabricating such bearing assemblies and apparatuses are disclosed. In an embodiment, the plurality of PCD bearing elements of one or more of the bearing assemblies disclosed herein include at least one first PCD bearing element. At least a portion of the first PCD bearing element exhibits a coercivity of about 125 Oersteds or more and a specific magnetic saturation of about 14 Gauss cm.sup.3/gram or less. The first PCD bearing element includes a bearing surface with at least one groove formed therein. In an embodiment, the plurality of PCD bearing elements also include at least one second PCD bearing element. The second PCD bearing element exhibits a coercivity that is less than and a specific magnetic saturation that is greater than the first PCD bearing element.