To provide a ball transfer and a seal member for a ball transfer, a seal member is employed which is characterized in that it has a seal member employing pile fiber that, at a ball transfer having a main body which has a socket, an inner surface of which is a hemispherical concave surface, a plurality of ball bearings arranged at the main exterior socket, a primary ball, diameter of which is greater than that of said ball bearings and which is rotatably supported by the socket by way of the ball bearings, and a housing-like case which surrounds the main body socket and rotatably supports the ball bearings and the primary ball at a bearing portion thereof and which has a hole from which a portion of the primary ball is made to protrude at an upper surface of the primary ball socket.

A magnetic conveyance system comprising a support structure having a ferromagnetic capacity and a trolley moveable upon the support structure in a plurality of directions. The trolley may include a trolley frame and at least one attractor cell disposed on the trolley frame. The at least one attractor cell may comprise a housing and at least one magnet, at least one friction reducing load spreading device, and a load transfer member disposed within the housing. The magnet may provide a magnetic attraction force between the trolley and the support structure. The friction reducing load spreading device may comprise a plurality of bearing balls circulating within a reservoir and a channel formed by the load transfer member disposed within the housing. The load transfer member may also include a bearing surface wherein a portion of the plurality of bearing balls is disposed between the bearing surface and the support structure.

A rotary milking platform (1) comprises a platform (3) having a circular carrier beam (7) secured to the underside of the platform (3). The carrier beam (7) is supported on a plurality of support elements (10), each of which comprise a freely rotatable roller (35) which is configured to rollably engage an under surface (38) of the carrier beam (7). Each support element (10) comprises an anchor plate (27) adjustably mounted on a corresponding ground engaging element (20) which is secured to the ground. A carrier plate (40) is carried on four guide bolts (50) extending upwardly from the anchor plate (27). Side members (41) extending downwardly from the carrier plate (40) rotatably carry the roller (35). Compression springs (59) acting between abutment washers (55) secured to the guide bolts (50) and the carrier plate (40) urge the carrier plate (40) against heads (53) of the guide bolts (50). The compression springs (59) accommodate downward and upward movement of the roller (35) in order to accommodate rising and falling of the under surface (38) of the beam (7). The compression springs (59) permit tilting movement of the roller (35) about a tilt axis (61) which extends in the direction of motion of the beam (7) in order to facilitate tilting of the roller (35) to follow any non-horizontality of the under surface (38) of the beam (7). The tilt axis is located just below a line of contact (67) of the roller (35) with the under surface (38) of the beam (7) to minimise lateral movement of the roller relative to the beam (7) as the roller (35) tilts about the tilt axis.

A magnetic conveyance system comprising a support structure having a ferromagnetic capacity and a trolley moveable upon the support structure in a plurality of directions. The trolley may include a trolley frame and at least one attractor cell disposed on the trolley frame. The at least one attractor cell may comprise a housing and at least one magnet, at least one friction reducing load spreading device, and a load transfer member disposed within the housing. The magnet may provide a magnetic attraction force between the trolley and the support structure. The friction reducing load spreading device may comprise a plurality of bearing balls circulating within a reservoir and a channel formed by the load transfer member disposed within the housing. The load transfer member may also include a bearing surface wherein a portion of the plurality of bearing balls is disposed between the bearing surface and the support structure.

Provided are a bearing and a medical device in which a gap is secured between an inner ring and an outer ring, and the gap can be used as a flow path for a fluid or an object. A bearing having a plurality of rolling elements between an inner ring and an outer ring is provided with a raceway surface on which the rolling elements roll on the outer ring and receiving portions for rotatably accommodating the rolling elements at a position of the inner ring facing the raceway surface.

A magnetic conveyance system comprising a support structure having a ferromagnetic capacity and a trolley moveable upon the support structure in a plurality of directions. The trolley may include a trolley frame and at least one attractor cell disposed on the trolley frame. The at least one attractor cell may comprise a housing and at least one magnet, at least one friction reducing load spreading device, and a load transfer member disposed within the housing. The magnet may provide a magnetic attraction force between the trolley and the support structure. The friction reducing load spreading device may comprise a plurality of bearing balls circulating within a reservoir and a channel formed by the load transfer member disposed within the housing. The load transfer member may also include a bearing surface wherein a portion of the plurality of bearing balls is disposed between the bearing surface and the support structure.

A journal bearing includes a carrier ring, a plurality of bearing pads disposed on a radially inner side of a lower-half region of the carrier ring and configured to support a rotor shaft from below, and a pair of side plates disposed on both sides of the plurality of bearing pads with respect to an axial direction of the rotor shaft. Each of the side plates includes a first region including a circumferential range upstream of a first bearing pad positioned furthest upstream among the plurality of bearing pads, and a second region positioned upstream of the first region and has a larger distance between an inner peripheral surface of the side plate and an outer peripheral surface of the rotor shaft than that of the first region.

Provided herein are crankshafts comprising a first and second bearing journal both aligned along a crankshaft rotation axis, a first counterweight throw, a web throw including a first web and a second web coupled via a second crankpin, wherein the first web is coupled to the first counterweight throw via the first bearing journal, and a second counterweight throw coupled to the second web via the second bearing journal. The first web and second web each have a center of gravity (COG) offset from a plane defined by the crankshaft rotation axis and a longitudinal axis of the second crankpin. The COGs of each web can be on opposite sides of a plane defined by the crankshaft rotation axis and a longitudinal axis of the second crankpin. The COGs of each web can be substantially symmetrical relative to the plane.

A module bearing and a power transmission device including the module bearing. A module bearing includes a module outer wheel supported by and in contact with a side wall of a gear to guide rotational or linear motion of the gear, a bearing rotor rotatably disposed radially inward of the module outer wheel, and a part-assembly type module inner wheel disposed radially inward of the module outer wheel with the bearing rotor interposed therebetween and connected to the bearing rotor, in which a plurality of separate parts are manufactured and assembled into the part-assembly type module inner wheel to apply a preload to the bearing rotor.

A ball bearing assembly includes at least two units being axially coupled together to allow at least one set of plural spherical balls adapted to be installed between at least one pair of two adjacent units of the at least two units.