Abstract: A ball-worm transmission is provided which replaces the sliding friction of the classic worm mechanism with the rolling friction of spherical balls. The ball-worm transmission assembly includes a worm which defines a recirculation path, and a gear coupled to the worm via a plurality of spherical balls. The gear includes a plurality of teeth each having a thickness in a central plane of the gear and a lesser thickness towards both sides of the gear, so that a gap is defined between the teeth is larger towards both sides of the gear than in the central plane of the gear.

Abstract: A ball screw having: a screw shaft having a spiral ball rolling groove; a ball nut having a ball rolling groove corresponding to the ball rolling groove; and a large number of balls interposed between the ball rolling grooves so as to roll freely; wherein the ball rolling groove of at least one of the screw shaft and the ball nut is ground so that a maximum value component of a number of undulation peaks per lead in the ball rolling groove is not in a range of from 0.95 nm to 1.05 nm centered on an integral multiple nm of a number m of load balls per lead calculated by an expression: ( ? ? ? d m ) 2 + L 2 P in which P is a distance between centers of the adjacent load balls disposed at substantially equal intervals in the ball rolling groove, dm is a ball pitch circle diameter, and L is a lead.

Abstract: A rotary bearing has a first lubricant passage having one end which opens in an inner peripheral surface of a radially outer bearing part and another end which is connectable with a lubricant supply, at least one second lubricant passage which leads from an outer peripheral surface of a radially inner bearing part to an inner peripheral surface of the radially inner bearing part, and a ring chamber between the outer bearing part and the inner bearing part, in which the first lubricant passage and the second lubricant passage open the ring chamber, and a lubricant distributing element formed as a separate part arranged on the ring chamber, and is in a lubricant supplying connection with at least one lubricant passage, and outflow paths including a first outflow path for supplying lubricant to the engaging surfaces of the bearing parts, and a second outflow path for supplying lubricant through the second lubricant passage to a further lubricating point.

Abstract: A higher efficiency roller screw system that includes a nut body designed to engage a threaded shaft. The nut body includes a center bore with closed, partial helical grooves formed therein. Disposed inside the center bore is a shaft with open helical threads formed thereon. A plurality of rollers with non-helical grooves formed thereon are also disposed inside the nut body's center bore and longitudinally aligned with the shaft. The grooves on each roller are designed to engage the grooves on the nut body and the threads on the shaft. The nut body includes a cross-over region where the trajectory of the internal grooves extend radially outward and axially. When the rollers' grooves contact the grooves in the cross-over region, the rollers are forced outward to maintain contact with the grooves on the nut body and are deflected axially. When they move outward, they disengage from the helical threads on the shaft.

Abstract: A roller bearing oil feed device includes a plurality of rolling elements arranged in a plurality of rows in the axial direction between an outer ring and an inner ring, the inner ring being divided for each row of the rolling elements and a ring-shaped spacer being interposed at the position of this division, the inner rings and spacer being fitted onto a rotary shaft. A circumferential groove is provided in the inner peripheral section of the spacer and oil feed holes communicating with the circumferential groove are provided in the rotary shaft. An oil feed passage having an inlet opening into the circumferential groove and an outlet opening to a corner on at least one side in the axial direction of the spacer is provided in the spacer.

Abstract: A two-stage, bi-directional shift lever vibration isolator. A shift lever has a sleeve whereinside is a lever vibration isolator which includes a damping body having an axial bore and an outer surface characterized by an hour-glass cross-section composed of convex and concave surfaces; a transmission shift shaft attachment housing located in the bore; an upper washer connected to the housing and abutting an upper end of the damping body; and a lower washer connected to the housing and abutting a lower end of the damping body. The upper and lower washers are sized to provide a predetermined perimeter separation with respect to the sleeve. The hour-glass cross-section of the damping body provides bi-directional natural frequency of vibration and stiffness.

Abstract: A mechanical attachment for a two-stage, bi-directional shift lever vibration isolator. A shift lever has a sleeve which receives thereinside a lever vibration isolator which includes a damping body having an outer surface characterized by an hour-glass cross-section; an attachment housing within the damping body; and upper and lower washers connected to the housing. An attachment bore passes laterally through the housing and is lined by a layer of the damping body. The attachment bore is disposed in the center of recessed surfaces of the hour-glass cross-section. An attachment pin passes through the attachment bore and the sleeve. The shift lever vibration isolator is freely slidable on the attachment pin, facilitated by a clearance between the attachment pin and the bore lining layer.

Abstract: A ball bearing in which an annular cage with a plurality of pockets formed through the annular cage is incorporated between inner and outer rings, a ball is housed in each pocket, the annular cage is guided by the outer ring, and a relationship between a radial clearance (guide clearance) ? of the annular cage with respect to the outer ring and an axial clearance (pocket clearance) ? of an inner wall face of the pocket with respect to the ball is set at ???.

Abstract: A lead screw for a linear actuator, which has a metal pipe having a helical projection resin-molded on its outer surface, and a ball for a pivot bearing welded to a distal end of the metal pipe, is disclosed together with a method of manufacturing the same. With the lead screw according to this invention, a slight positional deviation from the origin, which is caused at a high ambient temperature by thermal expansion of a resin material filled up in the metal pipe, can be prevented reliably. Linear movement upon rotation of a stepping motor can take place with high precision.

Abstract: A booster actuator 10 may be positioned between the solenoid 12 and a valve 14, and increases the energy output from the solenoid to activate the valve. The booster actuator 10 may include a force input member 28 and a force output member 30 each linearly movable with respect to a body 20 from an initial position to an activated position. A coil spring 46 biases the input member to the initial input position, while a plurality of disk springs 48 bias the output member 30 to the activated output position. A plurality of linking members 32 each pivotable with respect to the body normally retain the force output member in the initial position, but upon movement of the input member to the activated position release the force output member in response to the disk springs.

Abstract: A volumetric lubricant dispensing apparatus for delivering a precise volume of lubricant, such as oil, to a rotating machine element. The delivery mechanism includes a piston and cylinder assembly. A plurality of sensors are utilized to record operating conditions of the machine, element, environment, and lubricant. The apparatus is controlled either manually or with the aid of a controller unit such as a microprocessor. The output from each sensor is inputted into the microprocessor wherein an algorithm computes an responsive output. The responsive output is sent to the piston and cylinder assembly, which maintains an optimum lubricant condition within the reservoir wherein a rotating machine element located. Alternatively, for the purpose of qualitative control, the present invention may be described as a system intended for controlling lubricants, both mineral (natural) and synthetic based by measuring the condition characteristics of the lubricant.

Abstract: A dampening bearing support member having a plurality of bearings disposed between an object and a base with rheological medium disposed around the bearings, with the rheological medium being under the control of the user at times when it is desired to stiffen the rheological medium and limit or prevent movement of the bearings and the object in relation to the base.

Abstract: A boot assembly for a vehicle includes a retainer adapted to be connected to vehicle structure of a vehicle and a boot for surrounding either one of a shifter and parkbrake of the vehicle. The boot assembly also includes a seal connected to the boot and to the retainer to prevent the boot from exiting the retainer.

Abstract: An oil-impregnated sintered sliding bearing formed of a porous iron-based sintered alloy with quenched structure and receiving a high surface pressure capable of reducing the number of finishing steps by cutting and grinding and providing a bearing performance equivalent to or higher than that of conventional bearings, wherein a plurality of ridge-and-groove lines having a height difference of 2 to 12.5 ?m and extending in circumferential direction are axially arranged in parallel with each other by boring the bearing surface thereof to form a wavy surface in axial direction, and the portion thereof deeper by 10 to 60 ?m from the outer layer of the bearing surface is formed dense to seal surface pores so as to reduce the pores opening to the outer surface to 1 to 10 percent by area, whereby the bearing can be used at a surface pressure of 6 kgf/mm2 (58.5 MPa) or higher and a sliding speed of 2 to 5 cm/s.

Abstract: A rolling bearing with shield plate comprises an outer ring having an outer ring raceway and a circumferential anchor groove, the anchor groove provided at an axial end portion separated from the outer ring raceway and having an outside facing side surface, an inner ring having an inner ring raceway, a plurality of rolling members between the outer ring raceway and the inner ring raceway, and a shield plate in a generally circular ring shape provided with an inside facing, radially outer portion and an outer peripheral edge portion which is anchored in the anchor groove of the outer ring, the shield plate having an elastic seal member attached generally circumferentially and radially inner than the outer peripheral edge portion of the shield plate, such that the seal member is elastically held between the shield plate and the anchor groove.

Abstract: A linear motion guide unit has a guide rail made of a thin plate, and a stopper construction installed detachably to the guide rail to prevent a slider from becoming untethered while on a sliding movement relative to the guide rail. A linear motion guide unit is disclosed in which a slider fits for linearly sliding movement in a guide rail made of a thin steel material formed in an U-shape in cross section, and there is provided a stopper construction to keep the slider against getting out of the guide rail. The stopper construction is comprised of a stopper pin installed detachably to the guide rail at any lengthwise end thereof to cause the stopper pin to bear against any fore-and-aft end of widthwise opposing side walls of the slider, whereby the slider comes to rest to prevent it from becoming untethered from the guide rail.

Abstract: The concept of the invention is based on a machine housing with a bearing housing, the bearing seat of which is connected to a housing wall of the machine housing by a bearing housing wall provided with ribs (42, 43) and is subjected to radially directed forces (11, 44). The proposal is made that the bearing housing wall possess at least one ring shaped annular rib (42) which at least partially encompasses the bearing seat in an area (21), the angle (?) of inclination of which, relative to its original unloaded condition, would change itself to the greatest extent under load (11). Further proposed is that a plurality of additional ribs (43) run transverse to the annular rib (42). Thereby, with a relatively small consumption of material, a good shape-retention is achieved. In addition, a tilting of the bearing seat and the bearing is held to a lesser extent than is the case of conventional bearing housing structures.

Abstract: A screw device having a lubricant applying structure comprises a screw shaft provided with a spiral ball rolling groove, a nut provided with a loaded ball rolling groove having a spiral shape corresponding to the spiral ball rolling groove formed to the screw shaft, a number of balls disposed in a loaded rolling passage formed by the ball rolling groove and the loaded ball groove, a return member provided for the nut and arranged so as to connect one and another end portions of the loaded rolling passage so that the balls rolling the loaded rolling passage circulate, and a lubricant applying portion mounted to the return member so as to apply a lubricant. The lubricant applying portion is arranged inside the return member provided for the nut.

Abstract: An elastic rubber bearing is provided with an intermediate tube, namely, a bush bearing with a reinforcing insert arranged in the elastomeric bearing body. The design of the bearing includes a pretension, which is distributed as uniformly as possible both in relation to the circumference and in the axial direction. The pretension is generated in the elastomer in a bearing body after the vulcanization by calibrating the outer sleeve. A reinforcing element of the bearing includes an intermediate tube slotted on two sides in relation to its axial extension.

Abstract: A gear mechanism includes a driving gear, a driven gear, and an idler gear which is in mesh with the driving gear and the driven gear, wherein rotation of the driving gear is transferred to the driven gear via the idler gear. The idler gear includes first and second spur gears which are positioned adjacent to each other in an axial direction and are generally centered about a common axis, radial teeth of the first and second spur gears each being the same in shape, pitch and the number of teeth, and the first and second spur gears being biased to rotate in opposite directions. The first and second spur gears are connected so as to be relatively movable in a radial direction normal to the axial direction while maintaining the first and second spur gears in mesh with the driving gear and the driven gear.