Abstract: A pivot bearing includes a stepped shaft having an enlarged diameter shaft portion and a reduced diameter shaft portion; a plurality of balls of a lower row are interposed between the enlarged diameter shaft portion and a sleeve outer ring surrounding the enlarged diameter shaft portion; a ball bearing including inner and outer rings and a plurality of balls interposed therebetween is provided around the reduced diameter shaft portion so that the inner ring is secured around the reduced diameter shaft portion while applying an appropriate pre-load on the upper end surface of the inner ring, and the outer ring is urged to contact the lower surface thereof intimately onto the upper surface of the sleeve outer ring. The pivot bearing has a reduced number of parts, is facilitated in incorporation into a swing arm, and is expected to be manufactured at a reduced cost.

Abstract: In a linear antifriction bearing comprising a guide rail (1) which has a U-shaped cross section and on whose inner side raceways (4) parallel to the rail longitudinal direction are arranged, and comprising a running carriage (2) which can be displaced longitudinally and is supported by rolling elements (3) on the raceways (4) inside the guide rail (1), the rolling elements (3) are arranged in a plurality of endless tracks on a supporting body (5) of the running carriage (2). According to the invention, the supporting body (5) has an opening parallel to the raceways (4), and return channels are formed by a filling body (8) which is arranged in the opening and which has recesses (15) which run in the longitudinal direction to accommodate returning rolling elements (3).

Abstract: A linear guide comprises a linear guide comprises a rail having a plurality of running tracks, a carriage having at least one sliding element positioned opposite at least one of the running tracks, and an adjuster positioned between the at least one sliding element and the carriage. The sliding element has an inclined surface that faces away from the at least one running track and extends at an angle with respect to a travel direction of the carriage. The inclined surface has a plurality of first steps. The adjuster is shiftable in the travel direction and has an adjuster surface with a plurality of second steps that rest in shiftable fashion against the plurality of first steps. The adjuster is biased in a biasing direction against the sliding element such that the second plurality of steps can slide over the first plurality of steps as the sliding element moves in the travel direction.

Abstract: A seal device fixed to an end portion of a slider of a guide device includes: a casing; a plurality of seal members; and elastic members, wherein each seal member has a recess portion in which a rail penetrates. An inner circumferential face of the recess portion comes into contact with an outer surface of the rail when the seal member is pushed onto one side of the rail by the elastic members. The plurality of seal members are arranged in the casing in such a manner that when a seal portion of one seal member is pushed by the elastic member and contacted with one side of the rail, a seal portion of the next seal member is pushed by the elastic member and contacted with the other side of the rail.

Abstract: In a linear motion guide unit in which a rack-and-pinion arrangement is interposed between paired guide rail members to keep a cage against falling off from the guide rail members, the rack is made reduced in size in depth direction to fit well in even a gutter cut small in depth in the guide rail member. The rack is made up of successive teeth mating with the pinion, and side walls to join the teeth together with one another. The side walls of the rack are rendered thickened sidewise with depth while sidewise opposing surfaces defining a gutter cut in the guide rail also lean away one another with depth in a way conforming to the side walls of the rack, so that the rack can be fastened in the gutter by virtue of face-to-face engagement of the side walls with the associated surfaces in the gutter.

Abstract: A rolling element interference preventer for a guide device prevents a number of rolling elements rolling at regular intervals in a continuous circulation path of the guide device from interfering with each other. The rolling element interference preventer is formed of a thermoplastic resin elastomer having a physical property in accordance with an expression, (A×B)÷C≧18, where A represents a 10% elongation stress, B represents a tensile strength, and C represents a bending modulus of elasticity.

Abstract: A screw shaft for a motor operator is pivotally secured at each end by a bearing insert, with each bearing insert fitting within a channel defined within opposing walls of the housing.

Abstract: The invention is directed to an improved actuating mechanism. In the preferred embodiment, the actuating mechanism (15) is comprised of a split housing (16), a gear transfer system (18) enclosed in the housing, a threaded barrel (19) extending from the housing, a screw rod (20) threaded for movement through the barrel, an end plate (21) mounted to the housing opposite the barrel, the transfer system communicating with a driver input (22) and the barrel, whereby rotation of the transfer system will cause rotation of the barrel and axial movement of the screw rod through the barrel. The transfer system comprises beveled ring (23) and pinion (24) gears. The driver input comprises a square recess set in the pinion gear. The driver input may be adapted for operation with either a pneumatic driver or a manual driver. The housing is filled with grease and the barrel and housing are adapted to be greased by means of a conventional grease gun. The end plate and screw rod include clevis end connections (28, 32).

Abstract: A hemispheric bearing apparatus which enables a bushing to rotate without contacting a hemisphere. The hemispheric bearing apparatus according to the present invention includes hemispheres, the bushing which has hemispheric grooves formed at both ends, for receiving the hemispheres, and a spring for forcing the hemisphere or the bushing to each other in order for the hemisphere to be closely positioned with the bushing.