Abstract: A tire includes at least one air intake groove provided in a tire tread section, extending in a direction intersecting a tire circumferential direction, and having a groove width smaller than a groove depth, an air introduction groove opening to a tread surface side and communicating with the air intake groove to introduce an air on the tread surface side into the air intake groove accompanying tire rotation, and an air-guiding section having an air-guiding surface intersecting the air intake groove and directed outward in a position intersecting the air intake groove with respect to a center position in a groove longitudinal direction of the air intake groove to guide an air introduced into the air intake groove by the air introduction groove to a groove bottom side of the air intake groove by the air-guiding surface.

Abstract: A block has a first wall surface formed from a position where a lateral groove is opened to a first circumferential groove toward an upstream side of an air flow, a second wall surface formed from a position where the lateral groove is opened to a second circumferential groove toward the upstream side of the air flow, and a block corner portion formed at a position where the lateral groove is opened to the second circumferential groove. A virtual surface obtained by extending the second wall surface on the upstream side intersects with the block corner portion on a downstream side or passes through a position in the second circumferential groove which is apart from the block corner portion in a tire width direction. A groove width of the first circumferential groove gradually increases toward the downstream side of the air flow at the first wall surface.

Abstract: A block has a first wall surface formed from a position where a lateral groove is opened to a first circumferential groove toward an upstream side of an air flow, a second wall surface formed from a position where the lateral groove is opened to a second circumferential groove toward the upstream side of the air flow, and a block corner portion formed at a position where the lateral groove is opened to the first circumferential groove. A virtual surface obtained by extending the first wall surface of the block on the upstream side intersects with the block corner portion of the block on a downstream side or passes through a position in the first circumferential groove inside the block corner portion in a tire width direction. A groove width of the second circumferential groove gradually increases toward the downstream side of the air flow at the second wall surface.

Abstract: Circumferential groove's heat radiation on a tread center portion side of a plurality of blocks is enhanced. A block has a first wall surface formed from a position where a lateral groove is opened to a first circumferential groove toward an air flow's upstream side G, a second wall surface formed from a position where lateral groove is opened to a second circumferential groove toward the air flow's upstream side G, and a block corner portion formed at a position where lateral groove is opened to first circumferential groove. A virtual surface obtained by extending the block's first wall surface on the upstream side G intersects with the block's corner portion on downstream side H or passes through a position in the first circumferential groove on block corner portion's shoulder portion side. The second circumferential groove's width gradually increases toward the air flow's downstream side H at second wall surface.

Abstract: Provided is a method for treating a used absorbent article, this method being hygienic and capable of recovering recyclable material with a high degree of safety. This method for treating a used absorbent article is characterized by including (a) an acidic electrolyzed water treatment step that treats the used absorbent article in a treatment tank that has acidic electrolyzed water serve as a treatment fluid. This method preferably further includes (b) an alkaline electrolyzed water treatment step that treats the used absorbent article in a treatment tank that has alkaline electrolyzed water as a treatment fluid.

Abstract: A rack housing and a reduction drive housing accommodate a ball screw mechanism and a reduction drive. Within the rack housing and the reduction drive housing, a gap is provided between the left end of a nut and the rack housing, and a gap is provided between the right end of the nut and the rack housing. A groove serving as a communication path in communication with the gaps on both axial sides of the nut is provided in the outer circumferential surface of the nut. The groove is provided so as to avoid a recirculation path provided in the nut. The groove is provided axially and rectilinearly from the end of the nut that is located on the side opposite to a flange, to the flange and is provided along the flange.

Abstract: In a valve drive apparatus, which drives a first valve and a second valve of a supercharger, a first rod is rotatably connected to a first valve lever shaft at one end part thereof to drive the first valve and is connected to a shaft at the other end part thereof, and a second rod is rotatably connected to a second valve lever shaft at one end part thereof to drive the second valve and is connected to a second member at the other end part thereof. A spring is placed between a first engaging part of the first member and a second engaging part of the second member and urges the first member and the second member to urge a first contact part of the first member and a second contact part of the second member toward each other.

Abstract: A valve body includes an arm inserted portion that accommodates a part of a valve arm. A relation of hx<h1 is satisfied, provided that: a surface of the valve body that is in contact with a valve seat when an opening/closing valve closes a passing hole is a sealing surface; the valve arm and the opening/closing valve are in contact with each other on a contact surface when the opening/closing valve closes the passing hole; a surface of the contact surface that is the closest to the sealing surface is a valve-closed contact surface; hx is a size of thickness from the sealing surface to the valve-closed contact surface; and h1 is a size of thickness of the valve body.

Abstract: An electric power steering apparatus is configured to provide steering assistance as rotary torque of a driving toothed-pulley fixedly fitted to a rotary shaft of an electric motor is transmitted through a toothed belt to a driven toothed-pulley that rotates together with a ball screw nut in an integrated manner. The electric power steering apparatus is configured such that the amount of axial travel of a rack shaft is limited when a rack end and a housing come into contact with each other in the axial direction. The electric power steering apparatus includes a tilt allowing portion configured to cause the ball screw nut to tilt relative to a ball screw shaft such that the distance between the center of rotation of the driven toothed-pulley and that of the driving toothed-pulley increases when the rack end and the housing come into contact with each other in the axial direction.

Abstract: Heat radiation of circumferential direction grooves on a plurality of blocks on shoulder portion sides is enhanced. A block has a first wall surface formed from a position where a lateral groove is opened into a first circumferential direction groove toward an upstream side of an air flow, a second wall surface formed from a position where the lateral groove is opened into a second circumferential direction groove toward the upstream side of the air flow, and a block corner portion formed at a position where the lateral groove is opened into the first circumferential direction groove. A virtual surface obtained by extending the first wall surface of the block on the upstream side G intersects with the block corner portion of the block on the downstream side or passes through a position in the first circumferential direction groove on the tread center portion side of the block corner portion.

Abstract: A ball screw mechanism includes: a rack shaft, on the outer peripheral surface of which a spiral rack screw groove is formed; a cylindrical nut, on the inner peripheral surface of which a spiral nut groove that faces the rack screw groove is formed; and a plurality of balls disposed in a rolling passage that is a space surrounded by the rack screw groove and the nut groove. The nut is provided with: shift portions provided at both ends of the nut groove to shift the track of the nut groove in the axial direction of the rack shaft from the rack screw groove and to displace the nut groove to be deeper in the radial direction of the rack shaft as the track is shifted; a circulation passage that connects between the shift portions; and passage entrances that each connect between the shift portion and the circulation passage.

Abstract: A steering device includes a ball screw mechanism 8 that applies a force in the axial direction to a rack shaft of a vehicle, and a bearing that rotatably supports a nut with respect to a housing. The steering device also includes a plate disposed with a gap between the bearing and the plate in a rack shaft axial direction, and a coned disc spring disposed between the bearing and the plate. The plate abuts against the housing in the rack shaft axial direction. The coned disc spring elastically supports the nut in the rack shaft axial direction via the bearing. One side surface of the plate that faces the coned disc spring is formed in a tapered shape so as to cross a rack shaft radial direction.

Abstract: An electric power steering apparatus is configured to provide steering assistance as rotary torque of a driving toothed-pulley fixedly fitted to a rotary shaft of an electric motor is transmitted through a toothed belt to a driven toothed-pulley that rotates together with a ball screw nut in an integrated manner. The electric power steering apparatus is configured such that the amount of axial travel of a rack shaft is limited when a rack end and a housing come into contact with each other in the axial direction. The electric power steering apparatus includes a tilt allowing portion configured to cause the ball screw nut to tilt relative to a ball screw shaft such that the distance between the center of rotation of the driven toothed-pulley and that of the driving toothed-pulley increases when the rack end and the housing come into contact with each other in the axial direction.

Abstract: Provided is a process for recovering pulp fiber from used sanitary goods which contain both pulp fiber and a superabsorbent polymer and producing a recycled pulp which contains little ash and which is reusable for sanitary goods. This process comprises: a calcium treatment step for treating used sanitary goods with a water-soluble calcium compound and thereby conducting the dehydration of a superabsorbent polymer contained in the used sanitary goods; a disintegration step for applying a physical force to the used sanitary goods to disintegrate the used sanitary goods into pulp fiber and other materials; a separation step for separating the pulp fiber from a pulp fiber/other materials mixture which has been formed in the disintegration step; a disinfecting step using a disinfectant; and a citric acid treatment step for subjecting the separated pulp fiber to treatment with an aqueous citric acid solution at an acidic pH.

Abstract: A lower olefin producing catalyst which has high olefin production efficiency and maintains its activity for a long period of time when lower olefins are produced from an oxygen-containing compound, which is a solid catalyst used in producing lower olefins from an oxygen-containing compound, includes a solid-state catalyst component containing an MFI-type zeolite, in which, at a position where the shortest distance to the outer surface is maximum among all positions inside a structure of the solid catalyst, the thickness defined as a distance twice the shortest distance from the point to the outer surface is in a range of from 0.1 to 2.0 mm, and a method for producing lower olefins.

Abstract: A ball screw nut of a ball screw device is fastened to a motor shaft by engaging a male thread portion thereof with a female thread portion of the motor shaft. In a case where, in a movement pathway for balls, an area where the balls roll under load from a rack shaft and the ball screw nut is set as a load area, an area that does not receive the load is set as a no-load area, and areas for transition from the load area to the no-load area are set as transition areas, the male thread portion is formed such that the transition area on the nut-side joint portion-side closest to a seating surface does not overlap phase ranges of cut portions in a state where the ball screw nut is fastened to the motor shaft.

Abstract: An electric power steering device includes a motor, a drive pulley that is connected to the output shaft of the motor and includes helical teeth, a driven pulley that is arranged coaxially with a rack shaft and includes helical teeth, and a belt that is wound around these pulleys and includes helical teeth meshing with the respective helical teeth of both pulleys. Internal teeth on a belt each are formed to have a tooth thickness that is reduced toward both ends thereof along the width direction of the belt.

Abstract: A pneumatic tire 1 according to the present invention has turbulence generating protrusions on a tire surface, each of the turbulence generating protrusions having a sharp edge part. In the pneumatic tire, the following relationships are satisfied: 0.015?H/?R?0.64; 1.0?p/H?50.0; 0.1?H/e?3.0; 1.0?L/H?50.0; and 1.0?(p?w)/w?100.0, where “R” is a tire radius, “H” is a protrusion maximum height, “p” is a protrusion circumferential-direction interval, “e” is a protrusion radial-direction interval, “L” is a protrusion radial-direction length, and “w” is a protrusion circumferential-direction length.

Abstract: A nonwoven fabric facilitating permeation of loose passage. A nonwoven fabric is formed of short fibers of thermoplastic synthetic resin fused together. The nonwoven fabric is formed on a top side thereof with ridges and troughs undulating in a width direction and extending in parallel to one another in a length direction. When the nonwoven fabric is placed on a horizontal plane with the back side put in contact with the horizontal plate, highly void regions are formed between the back side and the horizontal plane. In the vicinity of apices of the respective ridges, the short fibers slope down so as to extend in a thickness direction of the nonwoven fabric.

Abstract: A ball screw mechanism includes: a rack shaft, on the outer peripheral surface of which a spiral rack screw groove is formed; a cylindrical nut, on the inner peripheral surface of which a spiral nut groove that faces the rack screw groove is formed; and a plurality of balls disposed in a rolling passage that is a space surrounded by the rack screw groove and the nut groove. The nut is provided with: shift portions provided at both ends of the nut groove to shift the track of the nut groove in the axial direction of the rack shaft from the rack screw groove and to displace the nut groove to be deeper in the radial direction of the rack shaft as the track is shifted; a circulation passage that connects between the shift portions; and passage entrances that each connect between the shift portion and the circulation passage.