73results about How to "Inhibits uneven wear" patented technology

In a ground-contact surface shape of a tire, when a tangent angle formed between an axial direction of the tire and a tangent X at each point P on a profile line of the tire is defined as θ, a tangent angle θ₁ in a ground-contact end point Pd is 25° or smaller. When a minimum value of the tangent angle θ in a region Y which is separated away from a tire equator C by a distance in a range of not less than 0.4 times but not more than 0.7 times a half of the ground-contact width of the tread is defined as θ₂, and a tangent angle at a 0.9 times point Pq which is separated away from the tire equator C by a distance of 0.9 times the half of the ground-contact width of the tread is defined as θ₃, a difference (θ₃−θ₂) is set in a range of not less than −10° but not more than +10°.

A tread portion of a pneumatic ti re includes inner land portions between outer circumferential main grooves disposed most on tread ground-contact end sides and at least one inner circumferential main groove on the inner side thereof. The inner land portions are divided into inner blocks by inner lateral grooves inclined at an angle α of 10 to 40°. The inner lateral grooves consist of first inner lateral grooves and second inner lateral grooves which are alternately arranged in a circumferential direction. The first inner lateral grooves include a wide-width part connecting to the outer circumferential main groove and a narrow-width part connecting to the inner circumferential main groove.

A pneumatic tire is provided which can realize an increase in stone-catching resistance while suppressing uneven wear such as river wear in a tread portion. In a pneumatic tire in which a center rib and intermediate ribs which are defined by four straight-line main grooves, which extend continuously in a circumferential direction of the tire and shoulder ribs which are defined by the main grooves which are situated closer to shoulders of the tire and straight-line thin grooves which extend continuously in the circumferential direction of the tire in the vicinity of tread ground-contacting edges are formed on the surface of a tread of the tire, inclination angles of a shoulder side groove wall of the main groove which defines the shoulder rib and a tire's equator line side groove wall of the thin groove are both such an angle that the shoulder side groove wall and the tire's equator line side groove wall are inclined at an angle of not more than five degrees in a direction in which the width of a proximal portion of the rib is expanded relative to normal lines to the tread.

The invention provides a burr removal device and a burr removal method. The burr removal device (100) comprises: grinding components (21, 31) which includes rotating shafts (25, 35) and grinding faces (21C, 31C) rotated along with and orthogonal to the rotating shafts (25, 35); a displacement component (10) which enables a grinded component (1) and the grinding components (21, 31) to relatively displace down a straight path; driving components (20, 30) which drive the grinding components (21, 31) to apply the grinding components (21, 31) to the grinded component (1) at a first grinding position that deviates from a central path of the grinded component (1), and to apply the grinding components (21, 31) to the grinded component (1) at a second grinding position that is isolated from the central path of the grinded component (1) and offset at one side opposite to the first grinding position.

The present invention is to stabilize behavior of brake pads at the time of braking of a disc brake so as to suppress generation of brake noise, and also to reduce the roll moment of the brake pads generated at the time of braking so as to suppress uneven abrasion of linings. A back plate (41) of a brake pad (40) is biased inward in the rotor radial direction by a plate spring (80). The back plate (41) is engaged at two points with an inner periphery support shaft (61) provided integrally with a caliper (20) on a V-shape inner peripheral abutment (41a) (provided in the back plate (41) on the inner side of a lining (42) in the rotor radial direction and on the center in the rotor circumferential direction), and engaged at one point with an outer periphery support shaft (62) provided integrally with the caliper (20) on an outer peripheral abutment (41b) (provided in the back plate (41) on the outer side of the lining (42) in the rotor radial direction and on the center in the rotor circumferential direction).

A heavy duty tire comprising: a shoulder rib (A1) (shoulder rib (A5)) which is provided to a tread shoulder unit; a second rib (A2) (second rib (A4)) which is adjacent to the shoulder rib (A1) with a circumferential groove (110) (circumferential groove (116)) interposed therebetween and is provided further toward the tire equator side than the shoulder rib (A1); and an uneven wear absorbing rib (B1) (uneven wear absorbing rib (B2)) provided within the circumferential groove (110) and located further toward the inside in the tire radial direction than the tread surfaces of the shoulder rib (A1) and of the second rib (A2). Circumferential narrow grooves (10, 12) having a smaller width than the circumferential grooves (110, 116) are formed in the second ribs (A2, A4). Each circumferential narrow groove (10, 12) is formed in such a manner that, when the tire is mounted on the vehicle, the circumferential groove (10, 12) is located on the outer side of the tire with reference to the center of the second rib (A2, A4) in the tread width direction.

Provided is a tire which is configured so that driving stability and water discharge properties on a wet road surface can be maintained and so that the uneven wear of the treading surface of the tread can be minimized. A tire is configured in such a manner that the treading surface of the tread has lands defined by circumferential grooves extending in the circumferential direction of the tire, each of the lands having arranged therein lateral grooves extending across the land. The lateral grooves are arranged so that, when the lateral grooves are projected on the equatorial plane of the tire, lateral grooves adjacent to each other in the circumferential direction of the tire do not overlap each other. Each of the lateral grooves is composed of: a center region extending tilted relative to the width direction of the tread; and side regions extending from both ends of the center region toward circumferential grooves at a tilt angle relative to the width direction of the tread, the tilt angle being less than the tilt angle of the center region. Each of the side regions has a groove width expanding toward a circumferential groove. The lateral grooves have sipes extending inward in the radial direction of the tire from the bottoms of the lateral grooves, each of the sipes having a shallow bottom only in the center region, the shallow bottom being disposed near the boundary between at least the center region and a side region in such a manner that the start point of the shallow bottom is located at a distance from the boundary.

An oil tight type chain tensioner applies tension to a chain used in an engine. The tensioner includes a housing, in which oil is sealed, and a reciprocating rod extending from the interior of the housing to the exterior for pressing the chain. An oil seal is located between the outer circumferential surface of the rod and the inner circumferential surface of the housing. A reservoir for retaining the oil is communicated with the interior of the housing. This structure permits the oil to flow between the interior of the housing and the reservoir in correspondence with the reciprocation of the rod. The reservoir has a hole for permitting air communication from the interior of the reservoir to the exterior but restricting an oil flow from the exterior of the reservoir to the interior.

The present invention is provided with: a mounting body mounted on an axle; a ring-shaped body (13) surrounding the mounting body from an outside in a tire radial direction; a connecting member (15) configured to connect the mounting body and the ring-shaped body (13) such that the mounting body and the ring-shaped body (13) are displaceable; and a cylindrical tread member (16) mounted over the ring-shaped body (13), wherein grooves (51, 52) are formed at an outer peripheral surface of a portion located above and corresponding to a portion of the tread member (16) at which the ring-shaped body (13) and the connecting member (15) are connected.

A V-face of a metal element is prevented from being inclined due to a load from a pulley by increasing the height Hs of an upper non-contact portion of the V-face of the metal element. For example, when the height of the V-face is represented by Hv (mm), and the height of the upper non-contact portion of the V-face is represented by Hs (mm), the height Hv of the V-face and the height Hs of the upper non-contact portion are set so that a relationship <paragraph lvl="0"><in-line-formula>-0.5265Hv+2.768<=Hs<=-0.5934Hv+3.524 </in-line-formula>is established.

The object of the invention is to construct a horizontal-axis wind turbine comprising a dual-system pitch drive unit for one blade that is independent up to the transmission mechanism or a dual-system yaw drive unit for one wind turbine nacelle that is independent up to the transmission mechanism, and to provide the dual system with new applicability. The horizontal-axis wind turbine of the present invention has a hub 1 and a blade 2 that are connected by way of an interposed section 5b, 6b, 7 which can freely rotate around the pitch axis of the blade with respect to both the hub and the blade; and further comprises: a hub-side interposed section drive unit 10 that relatively rotates the interposed section with respect to the hub, and a blade-side interposed section drive unit 11 that relatively rotates the blade with respect to the interposed section. The horizontal-axis wind turbine further comprises a hub-side interposed section angle sensor, a blade-side interposed section angle sensor and hub-side blade angle sensor, and is configured to control the pitch angle of the blade with respect to the hub whether controlling both drive units or controlling only one drive unit. Similar connection mechanism and drive and control mechanism is applied to between a tower and a nacelle.

The invention provides a pneumatic tire, which can be used on ice and is wear resistant. The tread (2) of the pneumatic tire (1) is provided with a pair of central main ditches (5), a central area (5), and tire shoulder areas (7). The central area (5) and each tire shoulder area (7) are provided multiple patterned blocks (12), which are defined by fine ditches (10) extending along the circumferential direction of the tire and cross ditches (11) extending along the axis of the tire. At least one of patterned blocks (12) is divided into patterned block small sheets (51) and patterned block large sheets (52) by a plurality of sipings (50); wherein the width of the patterned block large sheets (52) is larger than that of the patterned block small sheets (51). In each patterned block (12), the patterned block small sheets (51) and patterned block large sheets (52) are alternatively arranged along the circumferential direction of the tire.

A pneumatic tire is provided with a tire body (6), a belt ply (7) and a tire shoulder belt-shaped layer (9). Tire surface rubber (2G) which is configured on a tire surface (2) comprises the following components: a pair of tire shoulder grounding parts (11) which is provided at a tire radial outside of the tire shoulder belt-shaped layer (9); and a tire crown grounding part (12) which is provided between the tire shoulder grounding parts (11). The contour of the external surface of the tire shoulder grounding parts (11) is provided at the radial outside of the tire for 0.5-1.5mm relative to an elongation contour which is obtained through imaginarily elongating the contour of the external surface of the tire crown grounding part (12) to outside. According to the pneumatic tire, non-uniform abrasion of the tire shoulder grounding part can be restrained.

A dial switch is provided with: a pivoting section (40) having an uneven peripheral surface (46a); a plunger (60); a holding section (52) for holding the plunger (60) so that the plunger (60) can reciprocate; and a coiled spring (51) for pressing the plunger (60). The holding section (52) has a guide surface (53) extending in the direction in which the plunger (60) moves and surrounding the plunger (60) from the outside. The plunger (60) is provided with: an outer wall section (63) which has an outer peripheral surface (63a) located close to the guide surface (53), and also has an inner peripheral surface (63b) having an inner diameter greater than the outer diameter of the coiled spring (51); and an inner shaft (64) which is located inside the outer wall section (63) and has a rear end located further toward the front side than the rear end of the outer wall section (63), the inner shaft (64) being adapted to enable the coil spring (51) to be mounted on the outer side thereof. The difference between the outer diameter of the inner shaft (64) and the inner diameter of the coiled spring (51) is less than the difference between the inner diameter of the outer wall section (63) and the outer diameter of the coiled spring (51).