Abstract: A low pressure radial ply tire (20) for light off-the-road use has tow radial carcass plies (22) oriented at a cord angle (CA) with respect to the Equatorial Plane (EP) from 65 to 85.degree.. The tire is not reinforced by a belt reinforcing structure to allow the carcass (22) to compensate within the footprint of the tire under varying conditions. The tread (26) is provided with a number of holes (38) having a very shallow depth and spaced uniformly across the tread surface to increase flotation and wherein the net-to-gross is in the range of 0.63 to 0.77.

Abstract: A heavy duty pneumatic radial tire including a pair of bead portions, a carcass consisting of one steel cord layer and extending between the bead portions, and a tread portion arranged radially outward of a crown portion of the carcass. A normal rim on which the tire is mounted has a bead seat at an angle of approximately 15.degree. relative to a rotating axis of the tire and engaging the bead portions of the tire. During filling the tire with inner pressure from 7% to 100% of a determined maximum inner pressure of the tire, a ratio A/B of an enlargement amount A of a shoulder in radial and outward directions to an enlargement amount B of the bead portion in axial and outward directions is within 0.25-0.7, preferably 0.3-0.

Abstract: A safety tire having a carcass turned up in both edges around bead cores, a tread thereon, a belt, a pair of bead apexes, wherein, in a state that the tire is assembled on a specified rim and inflated to a specified pressure, the aspect ratio of the tire is not more than 80%, the axial width WT of the tread is greater than the maximum width WC of the carcass, each edge of the tread is positioned at a height within a range of 50 to 100% of the sectional height HC of the carcass, the carcass provided on each side of the tire equator with a convex arc part with a radius R1 and a concave arc part with a radius R2 smoothly connected each other at an inflection point therebetween, the convex arc part has the center positioned inward of the tire and is extended radially inwardly from the point of the maximum width WC of the carcass to the inflection point, the concave arc part has the center positioned outward of the tire and is extended radially inwardly from the inflection point to the vicinity of a contact point

Abstract: A radial tire for motorcycle, in which the steering stability at high running speed is improved and the ply separation at the breaker edges is lessened. The tire comprises: a radial carcass extending between bead portions of the tire; a tread disposed radially outside the carcass; and a breaker disposed between the carcass and the tread and having at least one ply of metallic cords coated with rubber; each metallic cord comprising a plurality of twisted strands; each strand consisting of at least three twisted filaments made of metal; the elongation of each metallic cord when loaded when 1.0 kgf/cord being in a range of 0.5 to 1.5%; the tangential modulus of elasticity of each metallic cord when loaded with 10 kgf/cord being in a range of 8,000 to 15,000 kgf.sq.mm.

Abstract: A radial tire provided with a circumferentially extending narrow groove in a boundary region between a tread portion and a buttress portion, and the narrow groove is inclined axially inward at the bottom by an angle of 0 to 5 degrees to the normal direction to the tread face, whereby the occurrence of vehicle wandering is effectively prevented without producing uneven wear in the tread shoulder regions.

Abstract: A passenger car tire that combines a number of design features or parameters which yeild a tire which has road noise, tread wear and handling performance characteristics which are equal to or better than those exhibited by comparable prior art tires, which possesses improvements in mud and snow performance not heretofore approached in prior art high performance tires, and in which heat dissipation characteristics are such that ornamental white sidewall lettering may be applied without in any way detracting from performance and durability characteristics. Moreover, and most surprisingly, the tire of the present invention is actually lighter in weight than is the most comparable prior art high performance tire, which does not possess the improved mud and snow characteristics of the invention.

Abstract: A pneumatic tire in which various tire performances, such as wear resistance, uneven wear resistance, fuel economy and the like are all improved in a good balance is disclosed, whereina first point gap LA defined as the radial distance between a standard first point An on the tire equator on the tread face Tn when the tire is inflated to a standard internal pressure and a 10% first point As on the tire equator on the tread face Ts when the tire is inflated to 10% of said standard internal pressure is smaller than 1.0 mm,a third point gap LC defined as the radial distance between a standard third point Cn on said trade face Tn spaced apart 0.45 times of the tread width TWn from said standard first point An and a 10% third point Cs defined as the intersection of the radial line passing through said standard third point Cn with said tread face Ts is 1.0 mm or larger and smaller than 4.0 mm, andthe ratio LC/LA of said third point gap LC to said first point gap LA is 4.0 or larger.

Abstract: A pneumatic tire designed for use on paved road or dirt surfaces comprises a pair of annular tensile members, first and second carcass plies, a tread, and a pair of sidewalls extending between each annular tensile member and the tread. The plies from an angle between 20 degrees and 30 degrees with the tire's equatorial plane, the first ply having an substantially equal but opposite orientation from that of the second ply. The tread has a single radius of curvature in the axial direction. The tread radius is within .+-.2 inches of a radius defined by the following formula:DR=1747.29-337.967(OD)+16.4798(OD).sup.2 -0.0076(AN).sup.2where DR is the normally inflated design radius in inches of the normally inflated tire, OD is the tire's outside diameter measured in inches, and AN is the cord angle of the carcass plies measured in degrees. The tire has an aspect ratio of less than 50%.

Abstract: A heavy duty pneumatic radial tire including a pair of bead portions, a carcass consisting of one steel cord layer and extending between the bead portions, and a tread portion arranged radially outward of a crown portion of the carcass. A normal rim on which the tire is mounted has a bead base at an angle of approximately 5.degree. relative to a rotating axis of the tire and engaging the bead portions of the tire. During filling the tire with inner pressure from 7% to 100% of a determined maximum inner pressure of the tire, a ratio A/B of an enlargement amount A of a shoulder in radial and outward directions to an enlargement amount B of the bead portion in axial and outward directions is within 0.35-0.8, preferably 0.4-0.

Abstract: A linear tire and wheel assembly comprising a hub having spaced flanges on which are mounted an inner tube surrounded by a jacket over which a tire casing is mounted so that inflation of the inner tube results in the formation of a tire mounted on said hub. The jacket is made of flexible material which takes a predetermined shape when enlarged by the inflation of the inner tube. Air under pressure is supplied through one of the flanges.

Abstract: A radial tire for passenger cars, comprising: a pair of bead cores; a radial carcass ply, the edges of which are turned up around bead cores; a tread; a belt layer composed of at least two plies of steel cords; and band layers folded over at the edges of the belt layer to form an upper layer portion radially outside the belt layer and a lower layer portion radially inside the belt layer, wherein the band layers are composed of organic fiber cords inclined by 5 to 45 degrees to the circumferential direction of the tire. A gap distance G1 between the upper layer portions of the band layers is in a range of 35 to 65% of the width WB of the belt layer, and the width W2 of the lower layer portion is longer than the width W1 of the upper layer portion and their difference W2-W1 is in a range from 5 to 20 mm.

Abstract: A low pressure tire, comprises: a tire main body made of rubber, a pair of bead cores disposed in bead portions of the tire main body, and a rubber tread on a crown part of the tire main body. The maximum rubber thickness of the tire main body between a tread edge and a maximum tire width point is 1.3 to 3.5 times the rubber thickness at the tread edge, and further the maximum rubber thickness is 1.1 to 2.5 time the rubber thickness at the maximum tire width point, whereby weight reduction of tire is achieved while maintaining or improving the shock absorbing and damping characteristics of the tire.

Abstract: A pneumatic radial tire having a new carcass profile, which is characterized in that a radius TR1 of the radially expansive tread surface produced when the tire is mounted on the rim officially specified for use and inflated with air having 5% pressure of the specified maximum pressure, and another radius TR2 of curvature produced when the tire is inflated with air of the specified maximum pressure always satisfy the relation of 1.2.ltoreq.TR2/TR1.ltoreq.1.5. An above-mentioned radius of curvature increase with increasing air pressure.

Abstract: A pneumatic radial tire having such a radial cross-section that the profile of the outer surface of the tire side is composed of a plurality of straight lines and each intersection at which the straight lines meet with each other is formed so as to protrude in the outward direction of the cross-section of the tire.

Abstract: A low profile pneumatic radial tire comprises at least one carcass ply containing cords arranged substantially at 90.degree. relative to a circumference of a tread, and a belt consisting of at least two belt layers which are composed of metal cords inclined relative to the circumference of the tread and intersected with one another between the adjacent belt layers and which are arranged upon a crown of the carcass. The tread surrounds the crown, and is provided with a pair of circumferential main grooves which are disposed symmetrically with respect to an equatorial plane of the tire and which divide a treading portion of the tread into a central region and axially opposite side regions and which are separated by a distance ranging from 45 to 65% of a maximum width of the tire in the state that the tire is assembled onto a normal rim and inflated at a normal internal pressure.

Abstract: A pneumatic tire comprising: a pair of bead cores; a carcass turned over at its both ends around the bead cores; a tread on the carcass; a belt comprising at least two plies of steel cords and dispsoed radially outside the carcass; a pair of inner bands disposed between the carcass and the belt and each having strecthable cords made of organic fibers, the inner band cords laid substantially parallel to the tire equator; and the axially outer edge of the inner bands and the edges of a widest ply of the belt being substantially trued up, whereby both steering stability and high speed durability are improved.

Abstract: A heavy duty radial tire includes at least one radial carcass extending from one bead portion to the other bead portion and using inextensible cords and a belt arranged outwardly of the radial carcass for reinforcing a tread of the tire. The tire comprises, during expanding of the tire from 5% to 100% of a normal inner pressure, a first profile portion expanding radially outwardly in a tread zone, a second profile portion depressing axially inwardly of the tire in a radially outer zone of a sidewall from one end of said tread to a tire maximum width position when filled with the normal inner pressure, and a third profile portion expanding axially outwardly of the tire in a radially inner zone of the sidewall from the tire maximum width position when filled with the normal inner pressure to a parting point of the sidewall from the rim, thereby properly distributing strains occurring in the tire in filling with the normal inner pressure.

Abstract: A depressed radial tire having an aspect ratio of 65% or less, wherein a carcass line (5) ranging from a part (A) under the edge of a belt (6) to a part (C) about the upper end of a bead core (4) comprises an upper arc (7) having the center inside the tire and a lower arc (8) having the center outside the tire; and the radius of curvature (R1) of the upper arc divided by the radius of curvature (R2) of the lower arc is less than 0.8, whereby riding comfort is improved at no sacrifice to the steering stability.

Abstract: To provide good handling behavior for a motorcycle, the belt of the rear motorcycle tire has threads extending parallel to the equatorial plane and the slip angles of the tires as a function of the camber (slip angle .delta. as a function of camber angle .gamma.) are such that the difference: front slip angle .delta.2 minus rear slip angle .delta.1 as a function of camber angle .gamma. is an invariably increasing function of .gamma..

Abstract: A radial tire comprises a carcass, a tread thereon, a breaker therebetween, bead cores, and rubber bead apexes, and is characterized in that:(a) the clip width (C1) is smaller than the rim width (C2) of a normal rim for a tire;(b) the carcass (6), in a state of the tire mounted on the normal rim and inflated to a standard pressure, has:an outwardly bulging outer part (21) between the largest width point (D) and a radially outer second point (E2),an outwardly bulging middle part (22) between the largest width point (D) and a inflexion point (F), andan inwardly bulging inner part (23) between the inflexion point (F) and a radially inner first point (E1);(c) the radial height (H2) of the largest width point (D) from the first point (E1) is 50-40% of the height (H1) of the second point (E2);(d) the axial distance (L1) between the largest width point (D) and a third line (X3) is 28-33% of the height (H1); and(e) the axial distance (L2) between the inflexion point (F) and the third line (X3) is 70-55% of the distan

Abstract: A radial off-road tire has a sidewall provided with a protective rib which s located substantially at or outwardly of the level of the maximum axial width of the carcass reinforcement. The geometrical characteristics of length, thickness and location of the protective rib to the rest of the wall, combined with the characteristics of meridian radius of curvature of the tread and the angle which the upper face of the sidewall makes with the direction parallel to the axis of rotation of the tire makes it possible to increase the life of the tire and minimize the rate of propagation of scratches initiated by cutting objects.

Abstract: Tubeless type heavy duty low profile pneumatic radial tires are disclosed, which each comprise a radial carcass layer toroidally extending from one of beads to the other, and a belt comprising at least two plies successively closed piled on a crown portion of the carcass layer. The at least two plies have non-extensible cords arranged at a shallow angle with respect to an equatorial plane of the tire but intersecting between the plies through the tire equatorial plane. The tire uses at 15.degree. rim as a design rim thereof. When the tire is assembled into the design rim and inflated at a normal internal pressure, a shape of the carcass line in a tire radial section meets the following inequalities (1) through (4).0.45.ltoreq.H/B.ltoreq.0.75 (1)(-0.12 H/B)+0.79.ltoreq.l/B.ltoreq.(-0.12 H/B)+0.85 (2)(0.1 H/B)+1.11.ltoreq.B/J.ltoreq.(0.1 H/B)+1.15 (3)0<a/H.ltoreq.0.

Abstract: Heavy duty pneumatic tires having lug grooves at a tire tread surface are disclosed, wherein a width of a tread portion from a tire equator to one of tread edges which tread portion is to be located on a wheel-mounted outer side is larger than that of the other tread portion from the equator to the other tread edge. When contours of the tread portions located on the opposite sides of the tire equator are approximated by two respective circular arcs, the radius of curvature of the wider tread portion is larger than that of the narrower tread portion. A depth of grooves at the shoulder portion on the wider tread portion which depth is expressed by a distance between the tread edge and the bottom of the lug grooves is made smaller than that of the narrower tread portion.

Abstract: A pneumatic tire (10) has a preferred cross-sectional shape which acts in concert with a preferred tread structure to provide varying performance characteristics under varying operating conditions. The tread (11) has a directional tread pattern, with the net-to-gross ratio being higher in a central portion (CP) of the tread than in the laterally outer portions (OP.sub.1, OP.sub.2). The stiffness of the block elements (64,65,66,67,68,69,70,71) of the tread also varies across the width of the tread.

Abstract: A passenger car tire that combines a number of design features or parameters which yield a tire which has road noise, tread wear and handling performance characteristics which are equal to or better than those exhibited by comparable prior art tires, which possesses improvements in mud and snow performance not heretofore approached in prior art high performance tires, and in which heat dissipation characteristics are such that ornamental white sidewall lettering may be applied without in any way detracting from performance and durability characteristics. Moreover, and most surprisingly, the tire of the present invention is actually lighter in weight than is the most comparable prior art high performance tire, which does not possess the improved mud and snow characteristics of the invention.

Abstract: A radial ply aircraft tire (11) is mounted upon an H-type rim (10) which was originally designated for use with a bias ply aircraft tire. The ratio of the axial distance (WBF) between the rim flanges to the maximum cross-sectional width (CSWR) of the tire is in the range of 0.7 to 0.9. The ratio of footprint width to footprint length for the tire is in the range of 0.45 to 0.65. Preferably, the carcass (12) and the belts (14) are reinforced with aramid cords. A line (T) which is tangent to a carcass ply (12) and passes through the center of a bead (13) is inclined at an angle (.alpha.) of greater than 60.degree. with respect to the tire's axis of rotation.

Abstract: A tire and wheel rim assembly is described as comprising a tire with low aspect ratio in the range of from 40 to 45 and a wheel rim which has a diameter in the range of from 18 to 20 inches.

Abstract: The invention concerns a tire, especially suited for motorcycles, that is capable of high performances during racing competitions, due to the high rigidity of the tire-sidewall which permits considerable increase in speed when cornering. The said tire presents, in correspondence of the radially inner portion of the sidewall and in a straight section, the profile of the carcass plies and of the axially inner surface, concave inwardly, together with the profile of the axially outer surface, concave outwardly.

Abstract: A tire structure that is especially advantageous for an aircraft tire has a pair of annular elastomeric members (40,41) disposed axially inwardly of the carcass plies (13,14) to maintain the carcass plies in a desired configuration. A preferred arrangement of bead reinforcing strips (32,33,34,35) is disclosed for use in tires that are intended for mounting on H-type aircraft rims.

Abstract: A radial motorcycle tire comprising a ground contacting tread region reinforced between its edges by a breaker structure and having a substantially curved profile in the radial cross-section of the tire, a pair of tire beads each reinforced by a substantially inextensible bead reinforcement hoop and a tire sidewall disposed between each tread edge and bead region tire wherein each sidewall is reinforced by not more than two mutually contacting layers of carcass ply reinforcement for at least 80% of the length of the sidewall from the tread edge to the bead hoop with no other reinforcement fabric component being provided such that the said 80% or more of the sidewall is substantially flexible. The sidewall preferably contains virtually no apex strip and is also short, i.e. less than 35% of the tire sectional height (H).

Abstract: A high performance tire, in which the profile of radially outer ground contacting tread surface is radially outwardly expanded at both shoulder parts when the tire is inflated, and the tread pattern circumferential stiffness as well as index of groove volume is optimized so that resistance in wear, durability to high speed running (low degree of heat generation), resistance to cutting, and resistance to rolling (low fuel consumption) including wet grip performance and stability in vehicle driving may be advantageously improved without reducing comfortableness in vehicle riding.

Abstract: A pneumatic tire and wheelrim assembly for a motorcycle wherein the tire comprises a pair of axially spaced wheelrim engaging bead regions, a torroidal air pressure retaining carcass reinforced by a reinforced ply extending from one bead region to the other bead region, a round contacting tread which is curved in radial cross-section of the tire and which terminates adjacent to each bead region as a shoulder of the tread characterized by said shoulder having a radially inwardly facing shoulder formation and wherein the wheelrim comprises a pair of axially spaced bead seats, one for each bead region of the tire said bead seat extending axially outwardly as radially engagement positions which are complementary to the shoulder formation so that in the assembled tire and wheelrim the tread is easily located directly by the intergagement of the shoulder formations and the engagement portion.

Abstract: A toy vehicle wheel that changes from a generally cylindrical periphery with an initial diameter and axial width to a greater diameter periphery. The wheel has a hollow shell of rubber or some other flexible material and opposed sidewalls of the wheel are moveable relative to each other to compress the axial width and increase the diameter. Across a substantial portion of the initial axial width a number of slits extend so that the periphery is serrated when it is enlarged. In one form, an axial screw engages a sidewall to rotate the wheel in its initial quiescent condition along a relatively unobstructed surface, but, upon encountering an obstruction, will draw the one sidewall toward the other. Variations provide for containing the axial screw within the compressed wheel or permitting it to extend out of a sidewall. Other forms provide for movement of the sidewalls relative to each other with bayonet locking in a desired condition and for spring bias in one direction.

Abstract: A heavy duty pneumatic radial tire includes a carcass consisting of at least one layer of metal cords substantially radially arranged, a breaker consisting of at least two layers of metal cords to form a main reinforcement with the carcass, and bead portions including hard and soft stiffeners. The carcass has a particular radial profile having a ratio of radii R/R' determined by a radius R' of a standard circle and a radius R determined by a particular definition and has a maximum distance f between an arc of the standard circle and the remaining carcass line smoothly extending from the profile curvature of the shoulder. Moreover a radial profile over a radially inner zone of the sidewall of 20-45% of the radial height SH has a curvature 1/.rho. less than 6.times.10.sup.-3 mm.sup.-1 at a location 32.5% of the radial height corresponding to a center of the profile.

Abstract: A pneumatic radial tire for high-speed running vehicles has a directional tread pattern defined by one or two relatively wide circumferential grooves arranged in the central region and plural slant grooves arranged in each side region of the tread, and an aspect ratio of not more than 0.8. In this tire, the slant grooves are arranged in a herringbone form with respect to the equator without communicating with the circumferential groove, each of which extending from an initial end to a terminal end and being a folded line at a folding point corresponding to 0.3-0.45 times of the tread width that an inclination angle .alpha. of line segment inward from the folding point is 40.degree.-85.degree. with respect to the meridian of the tire and an inclination angle .beta. of line segment outward from the folding point is smaller than the inclination angle .alpha. and 0.degree.-50.degree. with respect to the meridian of the tire.

Abstract: A heavy duty pneumatic radial tire,wherein a main area of contact with the road provided on a tread surface is formed with a circular arc, having a large radius of curvature, which crosses another circular arc having a small radius of curvature, Ra, to form an edge-shaped boundary, said radius of curvature, Ra, being larger than the depth of main grooves provided in said main area of contact with the road and smaller than the value five times as much as the depth of said main grooves,wherein narrow grooves provided on the shoulder portions are linearly provided in the circumferential direction of the tire and at a distance of 1.5 to 5 mm away towards the center of the tread surface from said edge-shaped boundary and have a groove width in the range of 1.5 to 5 mm, the direction of said narrow groove being inclined at an angle in the range of 1.degree. to 5.degree.

Abstract: A passenger car pneumatic tire excellent in ride feeling, wherein a tread is reinforced by a belt consisting of plural metal cord layers so piled that the cords are intersected with one another and the following relation is met:-1.5.ltoreq.[(S/So)-1].times.100.ltoreq.-0.1in which S is the maximum tire width in the state that the tire is fitted to a normal rim while being filled with air at a pressure of 1.7 kg/cm.sup.2 and So is the tire maximum width after being mounted onto a rim but prior to the air pressure being applied to the tire.

Abstract: A pneumatic tire produced of elastomers, especially cast or injection molded polyurethanes has an inner body in which a reinforcement is embedded and anchored by means of holding ropes. The inner body may be provided as a closed tubular body and is encased by an outer body which accommodates a belt and is outwardly provided with a tread. At its side walls, the outer body is provided with respective bead cores in which area, the inner body of the tire is connected to the outer body.

Abstract: The invention concerns a tubular-tire for bicycles and its assembly on a mounting-rim of the channel type--that is normally used in combination with the usual tires having a beaded edge.The tubular-tire of the invention has a tunnel-shaped carcass profile, in the plane of the cross-section, provided with a supporting-base which is substantially concave in the center and flat at the sides and with also having two sidewalls that join together in a substantially semicircular vault.The radially inner portion of the sidewalls is joined, at the supporting base, at an angle of less than 90.degree. and it is reinforced with a pair of reinforcing elements--one textile and the other either a textile fabric, or an elastomeric liner.

Abstract: A pneumatic radial tire is disclosed, which comprises a toroidal tire body extending from bead portions to a crown portion through sidewall portions, and a reinforcement for the tire body consisting of a carcass composed of at least one cord ply containing polyester fiber cords therein, which cord ply being wound around a bead core embedded in each of the bead portions from the inside of the tire to the outside thereof, and a belt composed of at least two ply layers superimposed around the crown portion of the carcass and containing cords arranged at a relatively small inclination angle with respect to the mid-circumferential plane of the tire, the cords of which being crossed with each other. In this type of the tire, the carcass line of the tire body at a mounted state of the tire on a normal rim under a normal internal pressure depicts such a radial profile in tire section that a ratio of R/R' is within a range of 0.65-0.

Abstract: A pneumatic tire for motorcycles is disclosed, which comprises a tread portion defining a maximum width of the tire, a pair of sidewall portions, a pair of bead portions, a carcass of radial or semi-radial structure composed of at least one rubberized cord ply containing organic fiber cords therein, and a belt superimposed about a crown region of the carcass and composed of at least one cord layer containing cords with a modulus of elasticity of at least 600 kgf/mm.sup.2 arranged at an angle of not more than 30.degree. with respect to the equatorial plane of the tire, and has an aspect ratio of not more than 86%.

Abstract: A heavy duty low-section pneumatic and a process for manufacturing the same are disclosed. This tire comprises a radial carcass toroidally extending between bead portions, a belt composed of a first and second belt layers successively superimposed around a crown portion of the carcass and a tread rubber having substantially the same width as the maximum width of the belt. In the belt, the first belt layer is composed of at least two cord plies each containing cords inclined at a small angle with respect to the equatorial plane of the tire, the cords of which being crossed with each other with respect to the equatorial plane, while the second belt layer is composed of at least one cord ply containing non-expansible or hardly expansible cords arranged in substantially parallel to the equatorial plane and extends over both sides of the first belt layer between the first belt layer and the carcass.

Abstract: A bias ply snow tire for use on the rear wheels of a passenger car having radial ply tires on the front wheels. The bias ply tire has a low aspect ratio, narrow tread with a shallow nonskid pattern, narrow flange spacing and high ply turn-ups. The point of maximum section width of the inflated bias ply tire is located in the radially inner one-half of the cross section of the tire.

Abstract: A pneumatic radial tire is adapted to improve or reduce the rolling resistance and simultaneously to improve the steering stability and riding comfortability against vibration during running without adversely affecting the wet performance and durability by making higher the carcass maximum width position and the carcass curvature reverse position, or enlarging the curvature of the carcass in the radially outer zone of the carcass maximum width position and simultaneously the carcass curvature reverse extent in the radially inner zone of the sidewalls so as to intentionally deviate from the naturally equilibrated configuration.A method of manufacturing a reduced rolling resistance pneumatic radial tire uses a mold for vulcanizing and forming the tire therein, which mold has a particular shape of cavity having a foot width 20-50% wider than a rim width and diverging progressively from shoulder corresponding portions to the wider foot portion of the cavity.

Abstract: A passenger car pneumatic tire excellent in cornering stability, which is characterized in that the following ratio relations are met when the tire is assembled onto a rim with an internal pressure being filled:0.55.ltoreq.hw/h.ltoreq.0.700.75.ltoreq.tw/w.ltoreq.0.950.17.ltoreq.m/l.ltoreq.0.

Abstract: A pneumatic tire (A) includes a body having a crown (10) with a ground-engaging tread portion (20), a pair of sidewall portions (12, 14), as well as a pair of bead portions (16, 18). An annular substantially inextensible bead reinforcing member (36) is positioned in each of the bead portions (16, 18). A carcass ply (30) is positioned in each sidewall (12, 14) and the crown (10) and extends from one of the bead portions (16) to the other of the bead portions (18). A first elastomer reinforcing member (50) is positioned in each bead portion (16, 18) and is disposed axially outwardly of the carcass ply (30) and adjacent the bead reinforcing member (36). A second elastomer reinforcing member (60) is positioned in each bead portion (16, 18) with at least a portion of the second member being disposed axially inwardly of the carcass ply (30) and extending radially outwardly from adjacent the bead reinforcing member (36).

Abstract: A tubular tire for cycles comprising a tubular toroidal body including an inner airtight tube to be inflated, the tire body or carcass being equipped, on the outer surface mating the wheel rim, with a rubberized tape having projecting portions such as profiles or prominences adapted to ensure a better engagement between the tire and the rim.The carcass is built by longitudinally joining together the edges of a rubberized fabric, the junction being radially external with respect to the tire and below the tread. The edges are joined either by overlapping or by abutment of the edges. In this latter case a reinforcement strip is provided between the carcass and the tread. An additional narrow strip protecting the junction is provided between the carcass and the inner or air tube.According to an embodiment the tire has a tunnel shaped cross-section obtained by suitably shaping the rubberized tape and the tire body when vulcanizing the tire.

Abstract: A wheel is disclosed for use on land vehicles such as small manually drawn trailers and similar carriers, the wheel having a tire supporting rim (12) and a low pressure tire (48) engaging the rim, the tire comprising a thin walled torus (50) of elastomeric material, the torus having an inner diameter surface (52) engaging the rim, an inflation valve (54) and an outer diameter surface (56) for contacting a soft or irregular support surface; so that, the tire deforms or flattens substantially when it contacts such surfaces with an axle load applied to the wheel, thereby facilitating movement of a vehicle over such surfaces. A method of moving such vehicles is also disclosed.

Abstract: A pneumatic radial tire for passenger cars having a low rolling resistance and an excellent wet skid resistance is disclosed. The radial tire comprises a carcass of a radial construction toroidally extending between a pair of bead cores with the ends turned thereover, a tread portion arranged outside a crown portion of the carcass and having a two laminate structure of tread base rubber and tread cap rubber, and a reinforcing belt layer embedded in the tread base rubber and superimposed about the crown portion of the carcass. The tread base rubber and tread cap rubber have resiliences of not less than 65% and not more than 60%, respectively. The tread portion has a sectional ratio of a sectional area of the tread cap rubber occupied in the equatorial section of tire to a total sectional area of the tread portion of not less than 50% and a negative ratio of not more than 45%. The belt layer has a flatness of not more than 15%.

Abstract: In order to reduce the heating at the edges of the tread reinforcement plies, the additional working ply has an axial width which is between 1.05 times the axial width of the tread and 1.1 times the maximum axial width of the radial carcass reinforcement. The cables of this additional working ply follow a geodesic trace and form an angle of between 25.degree. and 65.degree. with the equatorial plane of the tire.