131results about How to "Avoid local wear" patented technology

An elastic-bodied crawler, in which damages, such as local wear, coming-off of driven projections and the like in use, are prevented from being brought about, and frictional resistance is decreased at engaging portions to provide for durability, comprises a body with a reinforcement layer of reinforcement cables embedded therein circumferentially, driven projections provided in a predetermined pitch on an inner peripheral surface of the body, lug portions formed on an outer surface of the body, and reinforcement members (driven projection reinforcement cables) embedded to bridge the driven projections and the body.

There is provided a conveyor apparatus free of pulsing motion in circulating chains to provide a comfortable ride quality on steps.

A conveyor apparatus 1 includes a step guide rail 3, a plurality of steps 5, a step chain 4, and a chain driving mechanism 10 for driving the step chain 4. The chain driving mechanism 10 includes a rotating and driving unit 11, a driving sprocket 12 which is rotated by a driving force given by the rotating and driving unit 11, and circulating chain 13 for giving a thrust to the step chain 4. The circulating chain 13 has chain links 13a and hinges 13b to be connected to the adjacent chain links 13a. The chain link 13a includes a placing surface 13c on which the step roller 4b is placed, and pressing surfaces 13d and 13d that are in contact with step rollers 4b.

In a rotary magnet sputtering apparatus, a target consumption displacement quantity is measured, and corresponding to the measurement results, a distance between a rotating magnet group and a target is adjusted, and uniform film forming rate is achieved over a long period of time so as to reduce the change of a target surface due to consumption of the target and to reduce the change of the film forming rate with time. An ultrasonic sensor or a laser transmitting/receiving device may be used as a means for measuring the consumption displacement quantity of the target.

A radius of curvature (R1) of a corner portion (40) on one side (an inside in an axial direction) of a groove of a tyre (20) is smaller than a radius of curvature (R2) of the other corner portion (41). Both of the radii of curvature (R1) and (R2) are set to be 2 mm or more. A first phantom circle (42) for defining the corner portion (40) is inscribed on a second phantom circle (43) for defining the corner portion (41). A point of contact (44) of the first phantom circle (42) and the second phantom circle (43) is positioned on an outside from the center of a groove (28c). A distance between the center of the groove (28c) and the point of contact (44) is equal to or smaller than one fifth of a width (B) of the groove (28c).

The purpose of the invention is to prevent accumulation of particulates on the outside of a net body of a particulate sifter having a cylindrical net body and to extend the lifetime of the net body. To achieve the purpose, in a particulate sifter which is provided with a sieve 21 having a cylindrical net body 26 extending in a horizontal direction and a booster having rotating blades which rotate along the inner surface of the net body 26 and which separates particulates that pass through the net body 26 from particulates and/or foreign substances that do not pass through the net body 26 while agitating the particulates that have flowed inside the sieve 21 with the booster, the sieve 21 is located rotatably around the central axis of the cylindrical net body 26. The sieve 21 may be rotated forcibly by an electric motor as a driving source or may be rotated by kinetic energy of particulate-air mixture agitated by rotating blades without a driving source.

An integral type thrust bearing is proposed which can be manufactured with fewer heat treatment steps. The retainer and the inner and outer rollers not hardened are assembled together with rollers into a bearing and thereafter the assembled bearing is carburized, hardened and tempered. This eliminates the need for individual heat treatment of the retainer and the inner and outer rings and decreases heat treatment steps for the production of thrust bearings.

A sprocket for preventing the partial wear on the teeth of the sprocket. The teeth of the sprocket comprised of a pair of side portions located on opposite sides of a tooth and a central portion located between the pair of sides. The pair of side portions has a hardness greater than the central portion.

The invention discloses a high-efficiency uniform feeding, sieving and crushing system for polysilicon and monocrystalline silicon and a method thereof. The system comprises a material cabin, a feeding machine, a crushing machine, an electronic valve, an accumulation amount detecting device and a control sub-system. The feeding machine comprises a feeding box, a vibrating motor and a screen mesh.The feeding box is provided with a box opening facing an upper discharging hole. One end of the screen mesh is positioned below the box opening; and the other end of the screen mesh faces a discharging end. The vibrating motor is used for moving a silicon material to the other end of the screen mesh in one direction to fall into a lower discharging hole. The accumulation amount detecting device isused for detecting the accumulation amount of the silicon material. The control sub-system is used for reducing the opening/closing frequency or opening/closing amplitude of the electronic valve whenthe accumulation amount is greater than a first preset accumulation amount, and increasing the opening/closing frequency or opening/closing amplitude of the electronic valve when the accumulation amount is smaller than a second preset accumulation amount. According to the high-efficiency uniform feeding, sieving and crushing system for the polysilicon and monocrystalline silicon and the method thereof, the silicon material uniformly falls into the crushing machine for crushing; the overall production efficiency of crushing is improved; the rejection rate of the silicon material is reduced; and the particle size of the finally crushed silicon material is more uniform.

A thrust bearing, wherein a cage (2) and inner and outer rings (3, 4) in non-quenched state are assembled with each other in the bearing formed integrally with rollers (1), and a carburizing and quenching, and tempering treatments are applied to the assembled bearing, whereby since the individual heat treatment for the cage (2) and the inner and outer rings (3, 4) can be eliminated, the heat treatment steps for the integral thrust bearing can be reduced.