63results about How to "Suppress fatigue" patented technology

Provided is a pneumatic radial tire: that includes a circumferential-direction reinforcement layer having a width increased with fatigue break of the circumferential-direction reinforcement layer being suppressed at edge portions thereof; and that suppresses separation in each of cross belt layers at edge portions thereof. A pneumatic radial tire according to the present invention is a pneumatic tire including: at least two cross belt layers disposed on an outer circumferential side of a carcass layer in a tread portion; and at least one circumferential-direction reinforcement layer disposed between these cross belt layers, a width of the circumferential-direction reinforcement layer being smaller than that of each cross belt layer. The pneumatic radial tire is configured so that: the cross belt layers are separated away from each other at outer sides respectively of end positions, in a width direction, of the circumferential-direction reinforcement layer; the circumferential-direction reinforcement layer includes steel cords of two types which differ in elongation at break; and the steel cord having relatively small elongation at break is disposed in a center portion of the circumferential-direction reinforcement layer, whereas the steel cord having relatively large elongation at break is disposed in each of outer side portions of the circumferential-direction reinforcement layer.

An actuator device includes: a support portion; a movable portion; a first connection portion connecting the movable portion to the support portion on a first axis so that the movable portion is swingable around the first axis; and a first wiring provided on the first connection portion. The first wiring includes a first main body formed of a metal material having a Vickers hardness of 50 HV or more. The first main body includes a first surface facing the first connection portion and a second surface other than the first surface. The second surface has a shape in which a curvature is continuous over the entire second surface in a cross-section perpendicular to an extension direction of the first wiring.

A belt seam treatment apparatus includes a support element with a smooth surface that supports the seam region of the belt and a heat and pressure source that heats a treatment strip and the belt seam region and that forces the treatment strip against the belt seam region. The support element can be a tube over which the belt hangs and can include a vacuum belt hold system that secures the seam region against the tube during treatment. The heat and pressure source can be a heated pressure bar engaging the entire seam region or a heated pressure wheel traversing the seam region of the entire belt width.

An endless loop-like chain 1p consists of a plurality of link plates, laminated, that are linked to be freely bendable by pin members. The endless loop-like chain 1p is looped over each of the upper rollers and a lower roller to make up a polygon. If the chain is rotated endlessly while a tension load is imposed on the chain by each of the rollers, a pretensioned chain is obtained.

A medical needle and the like that has small resistance when piercing, scraping or incising the body tissue, that is not easily bent and that reduces the reflection of the illumination as much as possible when in surgery performed under scope is provided. The medical needle and the like has a hardened layer, in which a carbon atom is penetrated, of a depth of 5 micrometers to 70 micrometers provided on a parent material surface of a fiber shape structure having an austenite stainless steel containing 1% to 6% of molybdenum or 13% to 25% of chromium. Further, after the hardened layer is provided, one part of the hardened layer is removed. Further, the dark layer is formed on the outer most surface of the hardened layer to provide a non-reflective surface.

A steam turbine blade in which the turbine blade has a blade root of the axially-inserted fir tree type and a larger number of turbine blades can be attached in a restricted outer peripheral region of a turbine rotor by arranging the blade root to be oriented in a direction forming a predetermined angle α larger than 0° relative to the axial direction of the turbine rotor. The steam turbine blade can suppress peak stresses generated at the bottoms of notches formed in the blade root and a blade groove and also suppress fretting fatigue from being induced by contact between peak stress generating areas and areas opposed to the peak stress generating areas at the notch bottoms. The steam turbine blade includes an airfoil, and a blade root attached to a turbine rotor and having plural stages of hooks in the radial direction of the turbine rotor.

An electrophotographic photoreceptor is provided that in excellent in the electrical characteristics such as the charging property, the sensitivity and the responsiveness, the oxidizing gas resistance such as the ozone resistance and the nitrogen oxide resistance, and the electrical durability such that even after repetition use the foregoing excellent electrical characteristics are not deteriorated. A photosensitive layer of an electrophotographic photoreceptor contains an amine compound represented by the general formula (1).