CA1072870A - Tire with tubular bead rings - Google Patents
Tire with tubular bead ringsInfo
- Publication number
- CA1072870A CA1072870A CA302,807A CA302807A CA1072870A CA 1072870 A CA1072870 A CA 1072870A CA 302807 A CA302807 A CA 302807A CA 1072870 A CA1072870 A CA 1072870A
- Authority
- CA
- Canada
- Prior art keywords
- bead
- fact
- rim
- bead ring
- bisector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/04—Bead cores
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
Tire having a carcass reinforcement anchored to at least one bead ring, the bead ring consisting of a hollow metallic mem-ber, is improved due to the fact that the bead ring as seen in radial cross-section is essentially formed of four sides which converge two by two and of an interior reinforcement connecting the two regions where two consecutive converging sides meet, and due to the fact that the bead ring is arranged in the bead in such a manner that the interior reinforcement forms an angle of less than ? 60° with the bisector of the angle formed by the bead seat on the rim with the tangent to the rim flange adjacent to said bead seat, the bisector being directed towards the inside of the tire, the latter being mounted and inflated.
Tire having a carcass reinforcement anchored to at least one bead ring, the bead ring consisting of a hollow metallic mem-ber, is improved due to the fact that the bead ring as seen in radial cross-section is essentially formed of four sides which converge two by two and of an interior reinforcement connecting the two regions where two consecutive converging sides meet, and due to the fact that the bead ring is arranged in the bead in such a manner that the interior reinforcement forms an angle of less than ? 60° with the bisector of the angle formed by the bead seat on the rim with the tangent to the rim flange adjacent to said bead seat, the bisector being directed towards the inside of the tire, the latter being mounted and inflated.
Description
The present invention relates to improvements in tires and more particularly in the beads of -tires oI very large si~e which are intended for use on heavy equipement, such as those used for civil engineering work.
~ t the present time, tires of the type in question are in most cases mo~mted wi-thout an inner -tube on rims faving frustoco-nical bead sea-ts. ~hus the bead must ful~ill -two e~sential roles, namely:
- assure -the seal be-tween -the -tire and tl~e rim, alld - secure -the tire to the rim, wh~tever the value of the tangetial driving force -to be transmit-ted.
'~he bead rings presen-t as the reinforcement of the beads contribute preponderantly to the carrying out of these two func--tions, but a-t the price O:r an excessive amount of material (steel wire or ribbon).
~ ur-thermore, -the ~atigue strcngtll of the elements forming the bead seems -to be related -to the value o~ the radial cross-section selec-ted ~or the bead r:ings.
Finally, the shape of the rad:ial cross-section of the or-finary bead rings formed of steel wires or ribbons causes, on therim, a distribution of the pressures of -the bead which is un~avo-rable, due to the coexistence of zones of excessively high local pxessures and zones of excessively low local pressures. ~s a re-sult, the beads become worn and/or slide circumferentially with respect to the rim.
~ he bead rings used in -the beads of tires of the -type in question therefore have an excessive radial cross-section as com-pared with that required, for instance, for sta-tic resistance.
In order to lighten the weight of -the bead rings i-t has already been pro~osed to use a hollow member, for example, of me-tal, the cavi-ty o~ which is filled with a ring of plas-tic material, or a hollow member of extruded plastic material. However9 such . . ~ - .- , ~. ~ :
- .. . . . .
- - . . . . , ~, ho:llow beacl rings would not be suitable for tires of the type in question, due in particular to the fact that their resistance to rup-ture and crushing is insufficient.
The problem at which the inven-tion is directed is therc-fore to create a hollow metallic bead ring the weight of which is low for a relatively high o~erall radial cross-section, but which is nevertheless resistant to rupture and crushing and the shape of radial cross-section of which causes as uniform as possible a distribution of the bead pressures on the rim.
~ccordingly, the tire in accordance with the present in-vention, having a carcass reinforcement anchored to at least one -bead ring, the bead ring consisting of a hollow metallic member, -~
is characteri~ed by thè fact that the bead ring, as seen in radial cross-section, is essentially formed of four sid~s which converge two by two and of an interior reinforccment connecting the two regions where -two consecutive converging sides meet, and by the fact that the bead ring is arranged in the bead in such a manner that the interior reinforce~ent forms an angle of less than -~ 60 -with the bisector of the angle formed by the bead seat on -the rim with the -tangent to the rim flange adjacent to said bead seat, the bisector being directed towards the inside of the tire, the latter being mounted and inflated.
~ y interior reinforoement there is understood not only the reinforcement itself or its axis of symmetry in the case of a li-near reinforcement or of a reinforcement with linear axis of sym~
metry, bu-t also the chord connecting the two ends of the reinfor~
cement in the event that the reinforcement is curved.
~ hus, by means of the invention, the radial cross-section .
of the bead ring is, by triangulation, made nondeformable, parti-cularly with respect to the forces coming from the rim and the carcass reinforcement and -tending -to c~lsh the radial cross-section of the bead ring.
, -:
~ t the present time, tires of the type in question are in most cases mo~mted wi-thout an inner -tube on rims faving frustoco-nical bead sea-ts. ~hus the bead must ful~ill -two e~sential roles, namely:
- assure -the seal be-tween -the -tire and tl~e rim, alld - secure -the tire to the rim, wh~tever the value of the tangetial driving force -to be transmit-ted.
'~he bead rings presen-t as the reinforcement of the beads contribute preponderantly to the carrying out of these two func--tions, but a-t the price O:r an excessive amount of material (steel wire or ribbon).
~ ur-thermore, -the ~atigue strcngtll of the elements forming the bead seems -to be related -to the value o~ the radial cross-section selec-ted ~or the bead r:ings.
Finally, the shape of the rad:ial cross-section of the or-finary bead rings formed of steel wires or ribbons causes, on therim, a distribution of the pressures of -the bead which is un~avo-rable, due to the coexistence of zones of excessively high local pxessures and zones of excessively low local pressures. ~s a re-sult, the beads become worn and/or slide circumferentially with respect to the rim.
~ he bead rings used in -the beads of tires of the -type in question therefore have an excessive radial cross-section as com-pared with that required, for instance, for sta-tic resistance.
In order to lighten the weight of -the bead rings i-t has already been pro~osed to use a hollow member, for example, of me-tal, the cavi-ty o~ which is filled with a ring of plas-tic material, or a hollow member of extruded plastic material. However9 such . . ~ - .- , ~. ~ :
- .. . . . .
- - . . . . , ~, ho:llow beacl rings would not be suitable for tires of the type in question, due in particular to the fact that their resistance to rup-ture and crushing is insufficient.
The problem at which the inven-tion is directed is therc-fore to create a hollow metallic bead ring the weight of which is low for a relatively high o~erall radial cross-section, but which is nevertheless resistant to rupture and crushing and the shape of radial cross-section of which causes as uniform as possible a distribution of the bead pressures on the rim.
~ccordingly, the tire in accordance with the present in-vention, having a carcass reinforcement anchored to at least one -bead ring, the bead ring consisting of a hollow metallic member, -~
is characteri~ed by thè fact that the bead ring, as seen in radial cross-section, is essentially formed of four sid~s which converge two by two and of an interior reinforccment connecting the two regions where -two consecutive converging sides meet, and by the fact that the bead ring is arranged in the bead in such a manner that the interior reinforce~ent forms an angle of less than -~ 60 -with the bisector of the angle formed by the bead seat on -the rim with the -tangent to the rim flange adjacent to said bead seat, the bisector being directed towards the inside of the tire, the latter being mounted and inflated.
~ y interior reinforoement there is understood not only the reinforcement itself or its axis of symmetry in the case of a li-near reinforcement or of a reinforcement with linear axis of sym~
metry, bu-t also the chord connecting the two ends of the reinfor~
cement in the event that the reinforcement is curved.
~ hus, by means of the invention, the radial cross-section .
of the bead ring is, by triangulation, made nondeformable, parti-cularly with respect to the forces coming from the rim and the carcass reinforcement and -tending -to c~lsh the radial cross-section of the bead ring.
, -:
-2-.
~ , ' ' . ' ' - ' ' ~ 7~
The radl~l cross-sec-tion of a bead ring in accordance with the invention preferably is essentiallvv formed of two sides of lit-tle or no curvature facing the rim and two other curved sides.
A-t the limit, the radial cross-scction of the bead ring in accordance with the invention may be circular or approxima-tely elliptical wi-th its minor axis sllbstantially parallel to -the in-terior reinforce~ent or contained within the interior reinforcement,~
or else in the shape of a square or parallelogram with rounded corners, -the small diagonal of the parallelo~ram being substantial-ly parallel to the in-terior rein:Corcemen-t or con-tained within i-t.
It is advantageous to arrange the interior reinforcement of the bead rin~ of the invention along the-bisector of the angle formed by the converging sides facin~ the rim or by -the chords subtendin~ the converging sides, or in such a manner that the in-terior reinforcemen-t has such bisector as the axis of symmetry.
~he converging sides of -the radial cross-section of the bead ring which face the rim or -the chords subtending said sides can foxm c~n an~le s~lbs-tantially equal to thc an~le Iormed by the bead seat on the rim with -the tangent to the rim flange adjacent to said bead seat.
~he bead ring in accordance wi-th the invention can also -: -be arranged in -the bead in such a manner that the interior rein-forcement or its axis of symmetry is parallel -to the bisector of the angle formed by -the bead seat on the rim with the tangent to the rim flange adjacent to said bead seat, or -tha-t this interior ~-:
reinforcement contains such bisector or has such as the axis of .. - -.
symmetry .
Such bead rings are well-sui.ted for tires whose carcass .
reinforcement is essentially formed of radial metal ca`bles and which are intended for heavy and very hea-vy vehic~es. ~
~y means of -the bead ring of the invention, -the pressure ~ ~ -on the xim o~ the portion of -the bead in ~rhich the bead ring is . ~ . . . ',, ~' -
~ , ' ' . ' ' - ' ' ~ 7~
The radl~l cross-sec-tion of a bead ring in accordance with the invention preferably is essentiallvv formed of two sides of lit-tle or no curvature facing the rim and two other curved sides.
A-t the limit, the radial cross-scction of the bead ring in accordance with the invention may be circular or approxima-tely elliptical wi-th its minor axis sllbstantially parallel to -the in-terior reinforce~ent or contained within the interior reinforcement,~
or else in the shape of a square or parallelogram with rounded corners, -the small diagonal of the parallelo~ram being substantial-ly parallel to the in-terior rein:Corcemen-t or con-tained within i-t.
It is advantageous to arrange the interior reinforcement of the bead rin~ of the invention along the-bisector of the angle formed by the converging sides facin~ the rim or by -the chords subtendin~ the converging sides, or in such a manner that the in-terior reinforcemen-t has such bisector as the axis of symmetry.
~he converging sides of -the radial cross-section of the bead ring which face the rim or -the chords subtending said sides can foxm c~n an~le s~lbs-tantially equal to thc an~le Iormed by the bead seat on the rim with -the tangent to the rim flange adjacent to said bead seat.
~he bead ring in accordance wi-th the invention can also -: -be arranged in -the bead in such a manner that the interior rein-forcement or its axis of symmetry is parallel -to the bisector of the angle formed by -the bead seat on the rim with the tangent to the rim flange adjacent to said bead seat, or -tha-t this interior ~-:
reinforcement contains such bisector or has such as the axis of .. - -.
symmetry .
Such bead rings are well-sui.ted for tires whose carcass .
reinforcement is essentially formed of radial metal ca`bles and which are intended for heavy and very hea-vy vehic~es. ~
~y means of -the bead ring of the invention, -the pressure ~ ~ -on the xim o~ the portion of -the bead in ~rhich the bead ring is . ~ . . . ',, ~' -
-3- :
, : . . ,; ~ . . : . .
t ~ Z ~
placed is made u~if`orm. ~ur~he~nore, the radial cross-section of the bead ring can be given a shape and area ~hich are suita-ble for assuring sufficient fatigue strength for the elements forming the bead al~d for assuring the bead ring itself suitable resistance to stresses which tend to deform i-t.
~ he protion of the description which follo~rs describes embodiments- of the invention, this description being given with reference to -the drawing, in wnich:
~ ig. 1 shows, in radial cross section, a bead ring in ac-cordance witn the invention arranged in a bead of a radial -tire, and Fig. 2 -to 8 show o-ther radial cross-sections of bead rings in accordance with -the inven-tion.
~ ig. 1 shows a bead 1 of a tire with a radial carcass reinforcement 2. The preferably meta:L carcass reinforcement 2 surrounds the bead ring 3 and its tul~led-up portion 21 rises to above the bead ring 3. The bead 1 is arranged on rim o:E which the drawing shows only the portion ~o~ningr a bead seat ~ and a rim flange 5 in-tended to come into contact with the bead 1. In the example selected, this bead seat ~ is inclined ~ith respect to the axis of rotation of the rim, indica-ted by the straight line Y~. The bead seat 4 and the tangent tl -to the adjacent rim flange 5 form a angle a.
~ he bead ring 3 in accordance with the invention has a radial cross-section which is essentially Iormed of t~o converging sides 31 and 32 which form wi-th each other an angle which is subs-tantially equal to the angle a, and of a circular axc 33 connecting the non-common ends of the converging sides ~~L and 32. On its in-- side~ the bead ring 3 has an interior reinforcement which is sym- -metrical with respect to the bisector S of the angle formed by the two con~erging sides 31 ancl 32~ This interior reinforcement is formed o~ a rib 34 coming from the region surrounding the point _~_ .
' , . ~ . ..
oE convcrgencc of -the two sides 31 and ~2, and oi another rib 35, wider -than -the rib 34, coming from the circular arc 33 and provi-ded at its Lree end with a groove 36. ~'he free end of the rib 34 fi-ts within the groove 36 of -the rib 35. The interior reinforce-ment 34, 35 opposes deformation, par-ticularly by crushing, of the hollow member in accordance with the inven-tion by dividing the radial cross-section of the bead ring into -two trlangles (shown in dashed line) of which the interior reinforcement forms a common slde.
~he axis of symmetry S and, therefore, the reinforcement 34, 35 itself form an angle ~ o: about 20 with respec-t to the bi-sector C of the angle ~ formed by the bead seat ~ on the rim with the tangent tl to the rim flange 5.
'~he two sides 31 and 32 are quasi-linear and therefore of practically ~ero curvature and face the bead seat ~r rim glange 5 of the rim. The angle formed by these -two sides 31 and 32 is substantially equal to the angle a ~medby the bead seat ~ with the tang~nt tl to the rim fl~mge 5. q`he circular arc 33 forms the other two sides of the radial cross-sec-tion, which are thus loca-ted in the extension of each other.
~ ig. 2 sho~s a bead ring 40 wllose radial cross-section is circular on the ourside. In accordance ~rith the invention, the diametrical intèrior reinIorceme~t consisting of two parts ~1, 42 divides this radial cross-section into t~o triangles (shown-in das- -hed line) of ~hich said interior reinforcement constitutes the com-mon side. -Fig. 3 shows a bead ring 50 whose radial cross-section has an approximately oval or elliptical shape. In accordance with the ~ invention, the bipartite interlor reinforcement 51, 52 divides this ellipse into two triangles (shown in dashed line). od which said i~terior reinforcement cons-titutes the common side. ~he dimension A of the radial cross-sec-tion of the bead ring 50, measured paral-~0~3X8~
lel to -the in-terior reinforcemen-t 51, 52, is - as furthermore in -the case o~ ï~igs. 1, 5, 7 and 8 - larger than its dimension B, measured perpendicular to said interior reinforcement. In this case, this side which is common to the two triangles merges with the minor axis of the elliptical cross-section of the bead ring.
~ig. ~ shows a bead ring 60 of square shape wi-th roundes corners. ~he bipartite interior rein~orcemen-t 61, 62 forms one of the diagonals of the square. This diagonal merges with the side co~non to the two t~iangles (shown in dashed line) into which -the contour of this bead ring can be subdivided.
Fig. 5 shows a bead ring 70 having an outer section in the from of a parallelogram with rounded corners. ~he bipartite in-terior reinforcement 71, 72 con-tains the smallest diagonal of -the parallelogram. This diagonal represents the side common to the two triangles (shown in dashed line), in-to which the contour o~
said bead ring can be subdivided.
'rhe interior reinforcement Sl of the bead ring ~0 of square radial cross-sec-tion shown iIl FiG. 6 di~fers from the interior rein-~orcemen~ described above by the fac-t -that it consis-ts of a single part ~1 whose ro~t ~2 is located in the region where the two con-verging sides ~3 and 84 come together, while the opposite end 8 is located in the region where the two opposite converging sides 85, 86 come together.
~he bead ring 90 illus-trated in Fig. 7 is distinguished ~rom all the preceding bead rings by the fact that two of its converging sides, in this case the sides 92, 92', are joined toge-ther and no longer formed of a single piece~ ~ikewise, its inte-rior reinforcement is composed of two joined sections 91, 91~ which are the extensions of the sides 92, 92', respectively.
}0 ~'inally~ the bead ring 100 of Fig, 8 has an interior rein-forcement composed of two sections 101, 101' which are connected to each other at their common apex 102~ I-ts twp sides 103) 104 i~
1~7~2~3'Y~
have a zero curvature, while the opposite sides 105, 106 are curved.
It goes wi-thou-t saylng that -the principle o~ -the invention can be extended to hollow bead rings having a pl.urali-ty o~ juxta-posed cavities o:~ triangular radial cross-section, ~lith a single side in common from one cavi-ty -to the ne}~t~
:
.. - . ...
:;
.. ~.. -' ' .
, .. . .. .. . .
, : . . ,; ~ . . : . .
t ~ Z ~
placed is made u~if`orm. ~ur~he~nore, the radial cross-section of the bead ring can be given a shape and area ~hich are suita-ble for assuring sufficient fatigue strength for the elements forming the bead al~d for assuring the bead ring itself suitable resistance to stresses which tend to deform i-t.
~ he protion of the description which follo~rs describes embodiments- of the invention, this description being given with reference to -the drawing, in wnich:
~ ig. 1 shows, in radial cross section, a bead ring in ac-cordance witn the invention arranged in a bead of a radial -tire, and Fig. 2 -to 8 show o-ther radial cross-sections of bead rings in accordance with -the inven-tion.
~ ig. 1 shows a bead 1 of a tire with a radial carcass reinforcement 2. The preferably meta:L carcass reinforcement 2 surrounds the bead ring 3 and its tul~led-up portion 21 rises to above the bead ring 3. The bead 1 is arranged on rim o:E which the drawing shows only the portion ~o~ningr a bead seat ~ and a rim flange 5 in-tended to come into contact with the bead 1. In the example selected, this bead seat ~ is inclined ~ith respect to the axis of rotation of the rim, indica-ted by the straight line Y~. The bead seat 4 and the tangent tl -to the adjacent rim flange 5 form a angle a.
~ he bead ring 3 in accordance with the invention has a radial cross-section which is essentially Iormed of t~o converging sides 31 and 32 which form wi-th each other an angle which is subs-tantially equal to the angle a, and of a circular axc 33 connecting the non-common ends of the converging sides ~~L and 32. On its in-- side~ the bead ring 3 has an interior reinforcement which is sym- -metrical with respect to the bisector S of the angle formed by the two con~erging sides 31 ancl 32~ This interior reinforcement is formed o~ a rib 34 coming from the region surrounding the point _~_ .
' , . ~ . ..
oE convcrgencc of -the two sides 31 and ~2, and oi another rib 35, wider -than -the rib 34, coming from the circular arc 33 and provi-ded at its Lree end with a groove 36. ~'he free end of the rib 34 fi-ts within the groove 36 of -the rib 35. The interior reinforce-ment 34, 35 opposes deformation, par-ticularly by crushing, of the hollow member in accordance with the inven-tion by dividing the radial cross-section of the bead ring into -two trlangles (shown in dashed line) of which the interior reinforcement forms a common slde.
~he axis of symmetry S and, therefore, the reinforcement 34, 35 itself form an angle ~ o: about 20 with respec-t to the bi-sector C of the angle ~ formed by the bead seat ~ on the rim with the tangent tl to the rim flange 5.
'~he two sides 31 and 32 are quasi-linear and therefore of practically ~ero curvature and face the bead seat ~r rim glange 5 of the rim. The angle formed by these -two sides 31 and 32 is substantially equal to the angle a ~medby the bead seat ~ with the tang~nt tl to the rim fl~mge 5. q`he circular arc 33 forms the other two sides of the radial cross-sec-tion, which are thus loca-ted in the extension of each other.
~ ig. 2 sho~s a bead ring 40 wllose radial cross-section is circular on the ourside. In accordance ~rith the invention, the diametrical intèrior reinIorceme~t consisting of two parts ~1, 42 divides this radial cross-section into t~o triangles (shown-in das- -hed line) of ~hich said interior reinforcement constitutes the com-mon side. -Fig. 3 shows a bead ring 50 whose radial cross-section has an approximately oval or elliptical shape. In accordance with the ~ invention, the bipartite interlor reinforcement 51, 52 divides this ellipse into two triangles (shown in dashed line). od which said i~terior reinforcement cons-titutes the common side. ~he dimension A of the radial cross-sec-tion of the bead ring 50, measured paral-~0~3X8~
lel to -the in-terior reinforcemen-t 51, 52, is - as furthermore in -the case o~ ï~igs. 1, 5, 7 and 8 - larger than its dimension B, measured perpendicular to said interior reinforcement. In this case, this side which is common to the two triangles merges with the minor axis of the elliptical cross-section of the bead ring.
~ig. ~ shows a bead ring 60 of square shape wi-th roundes corners. ~he bipartite interior rein~orcemen-t 61, 62 forms one of the diagonals of the square. This diagonal merges with the side co~non to the two t~iangles (shown in dashed line) into which -the contour of this bead ring can be subdivided.
Fig. 5 shows a bead ring 70 having an outer section in the from of a parallelogram with rounded corners. ~he bipartite in-terior reinforcement 71, 72 con-tains the smallest diagonal of -the parallelogram. This diagonal represents the side common to the two triangles (shown in dashed line), in-to which the contour o~
said bead ring can be subdivided.
'rhe interior reinforcement Sl of the bead ring ~0 of square radial cross-sec-tion shown iIl FiG. 6 di~fers from the interior rein-~orcemen~ described above by the fac-t -that it consis-ts of a single part ~1 whose ro~t ~2 is located in the region where the two con-verging sides ~3 and 84 come together, while the opposite end 8 is located in the region where the two opposite converging sides 85, 86 come together.
~he bead ring 90 illus-trated in Fig. 7 is distinguished ~rom all the preceding bead rings by the fact that two of its converging sides, in this case the sides 92, 92', are joined toge-ther and no longer formed of a single piece~ ~ikewise, its inte-rior reinforcement is composed of two joined sections 91, 91~ which are the extensions of the sides 92, 92', respectively.
}0 ~'inally~ the bead ring 100 of Fig, 8 has an interior rein-forcement composed of two sections 101, 101' which are connected to each other at their common apex 102~ I-ts twp sides 103) 104 i~
1~7~2~3'Y~
have a zero curvature, while the opposite sides 105, 106 are curved.
It goes wi-thou-t saylng that -the principle o~ -the invention can be extended to hollow bead rings having a pl.urali-ty o~ juxta-posed cavities o:~ triangular radial cross-section, ~lith a single side in common from one cavi-ty -to the ne}~t~
:
.. - . ...
:;
.. ~.. -' ' .
, .. . .. .. . .
Claims (11)
1. Tire having a carcass reinforcement anchored to at least one bead ring, the bead ring consisting of a hollow metallic member, characterized by the fact that the bead ring, as seen in radial cross-section, is essentially formed of four sides which converge two by two and of an interior reinforcement connecting the two regions where two consecutive converging sides meet, and by the fact that the bead ring is arranged in the bead in such a manner that the interior reinforcement forms an angle of less than ? 60° with the bisector of the angle formed by the bead seat on the rim with the tangent to the rim flange adjacent to said bead seat, the bisector being directed towards the inside of the tire, the latter being mounted and inflated
2. Tire according to claim 1, characterized by the fact that the radial cross-section of the bead ring is essentially for-med of two sides of little or no curvature facing the rim and of two other curved sides which may be located in the extension of each other.
3. Tire according to claim 1, charicterized by the fact that the radial cross-section of the bead ring has the shape of a circle.
4. Tire according to claim 1, characterized by the fact that the radial cross-section of the bead ring has the shape of a square with rounded corners.
5. Tire according to claim 1, characterized by the fact the radial cross-section of the bead ring has approximately the shape of an ellipse whose minor axis is substantially parallel to the interior reinforcement or is contained within the interior reinforcement.
6. Tire according to claim 1, characterized by the fact that the radial cross-section of the bead ring has the shape of a parallelogram with rounded corners, the small diagonal of which is substantially parallel to the interior reinforcement or is con-tained within the interior reinforcement.
7. Tire according to claim 1, characterized by the fact that the interior reinforcement is arranged along the bisector of the angle formed by the converging sides facing the rim or by the chords subtending the converging sides, or in such a manner that the interior reinforcement has such bisector as the axis of symmetry.
8. Tire according to claim 1, characterized by the fact that the converging sides of the radial cross-section of the bead ring which face the rim or the chords subtending said sides form an angle substantially equal to the angle formed by the bead seat on the rim with the tangent to the rim flange adjacent to said bead seat.
9. Tire according to claim 1, characterized by the fact that the bead ring is arranged in the bead in such a manner that the interior reinforcement or its axis of symmetry is parallel to the bisector of the angle formed by the bead seat on the rim with the tangent to the rim flange adjacent to said bead seat.
10. Tire according to claim 1, chacacterized by the fact that the bead ring is arranged in the bead in such a manner that the interior reinforcement contains the bisector or has the axis of symmetry the bisector of the angle formed by the bead seat on the rim with the tangent to the rim flange adjacent to said bead seat.
11. Tire according to claim 1, characterized by the fact that it comprises a carcass reinforcement of radial type, prefe-rably of metal.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7714329A FR2390299A1 (en) | 1977-05-09 | 1977-05-09 | PNEUMATIC WITH TUBULAR RODS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1072870A true CA1072870A (en) | 1980-03-04 |
Family
ID=9190636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA302,807A Expired CA1072870A (en) | 1977-05-09 | 1978-05-08 | Tire with tubular bead rings |
Country Status (15)
| Country | Link |
|---|---|
| JP (1) | JPS53138110A (en) |
| AU (1) | AU515545B2 (en) |
| BE (1) | BE866468A (en) |
| BR (1) | BR7802908A (en) |
| CA (1) | CA1072870A (en) |
| DE (1) | DE2820182C2 (en) |
| ES (1) | ES469549A1 (en) |
| FR (1) | FR2390299A1 (en) |
| GB (1) | GB1597657A (en) |
| IT (1) | IT1107139B (en) |
| LU (1) | LU79620A1 (en) |
| MX (1) | MX145692A (en) |
| NL (1) | NL173149C (en) |
| OA (1) | OA05959A (en) |
| ZA (1) | ZA782630B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3132941A1 (en) * | 1981-08-20 | 1983-03-03 | Bayer Ag, 5090 Leverkusen | HIGHLY DURABLE VEHICLE TIRE |
| FI82217C (en) * | 1982-04-21 | 1991-02-11 | Dunlop Ltd | KOMBINATION AV PNEUMATISKT DAECK OCH HJULFAELG. |
| AU1677583A (en) * | 1982-07-13 | 1984-01-19 | Dunlop Limited | Tubular articles |
| DE3602873A1 (en) * | 1986-01-31 | 1987-08-06 | Continental Gummi Werke Ag | BULB CORE FOR AIR TIRES |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2220396B1 (en) * | 1973-03-07 | 1977-07-08 | Michelin & Cie | |
| DE2360731A1 (en) * | 1973-12-06 | 1975-06-12 | Continental Gummi Werke Ag | Automobile tyre bead construction - containing cores enclosing one or more esp. one hollow space |
-
1977
- 1977-05-09 FR FR7714329A patent/FR2390299A1/en active Granted
-
1978
- 1978-04-27 BE BE187186A patent/BE866468A/en not_active IP Right Cessation
- 1978-04-28 NL NLAANVRAGE7804633,A patent/NL173149C/en not_active IP Right Cessation
- 1978-05-03 GB GB17511/78A patent/GB1597657A/en not_active Expired
- 1978-05-08 ES ES469549A patent/ES469549A1/en not_active Expired
- 1978-05-08 AU AU35885/78A patent/AU515545B2/en not_active Expired
- 1978-05-08 MX MX173365A patent/MX145692A/en unknown
- 1978-05-08 IT IT68046/78A patent/IT1107139B/en active
- 1978-05-08 CA CA302,807A patent/CA1072870A/en not_active Expired
- 1978-05-08 LU LU79620A patent/LU79620A1/en unknown
- 1978-05-09 DE DE2820182A patent/DE2820182C2/en not_active Expired
- 1978-05-09 JP JP5489678A patent/JPS53138110A/en active Granted
- 1978-05-09 OA OA56492A patent/OA05959A/en unknown
- 1978-05-09 BR BR7802908A patent/BR7802908A/en unknown
- 1978-05-09 ZA ZA00782630A patent/ZA782630B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE2820182A1 (en) | 1978-11-23 |
| IT1107139B (en) | 1985-11-18 |
| FR2390299A1 (en) | 1978-12-08 |
| DE2820182C2 (en) | 1985-02-21 |
| ZA782630B (en) | 1979-04-25 |
| MX145692A (en) | 1982-03-24 |
| IT7868046A0 (en) | 1978-05-08 |
| BR7802908A (en) | 1978-12-26 |
| AU3588578A (en) | 1979-11-15 |
| NL173149B (en) | 1983-07-18 |
| AU515545B2 (en) | 1981-04-09 |
| ES469549A1 (en) | 1979-01-01 |
| NL7804633A (en) | 1978-11-13 |
| JPS6158322B2 (en) | 1986-12-11 |
| GB1597657A (en) | 1981-09-09 |
| OA05959A (en) | 1981-06-30 |
| NL173149C (en) | 1983-12-16 |
| FR2390299B1 (en) | 1981-07-24 |
| BE866468A (en) | 1978-08-14 |
| LU79620A1 (en) | 1978-11-06 |
| JPS53138110A (en) | 1978-12-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |