CA1098017A - Winter tire - Google Patents
Winter tireInfo
- Publication number
- CA1098017A CA1098017A CA322,690A CA322690A CA1098017A CA 1098017 A CA1098017 A CA 1098017A CA 322690 A CA322690 A CA 322690A CA 1098017 A CA1098017 A CA 1098017A
- Authority
- CA
- Canada
- Prior art keywords
- tire
- slits
- tread
- fact
- alpha
- 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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
-
- 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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1236—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special arrangements in the tread pattern
- B60C11/124—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special arrangements in the tread pattern inclined with regard to a plane normal to the tread surface
-
- 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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1204—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe
- B60C2011/1213—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe sinusoidal or zigzag at the tread surface
Abstract
ABSTRACT OF THE DISCLOSURE:
Tire intended for winter travel, having a tread comprising relief elements provided with slits inclined with respect to the normal to the tread and which are close to each other and form strips between each other, is improved due to the fact that, when the tire is not under load, the slits are inclined with respect to said normal by an angle at most equal to 45° in the direction of the tangential stresses on the tire exerted by the ground and due to the fact that these slits have a width which is other than zero.
Tire intended for winter travel, having a tread comprising relief elements provided with slits inclined with respect to the normal to the tread and which are close to each other and form strips between each other, is improved due to the fact that, when the tire is not under load, the slits are inclined with respect to said normal by an angle at most equal to 45° in the direction of the tangential stresses on the tire exerted by the ground and due to the fact that these slits have a width which is other than zero.
Description
The present invention relates to a pneumatic tire in-tended for winter travel, the tread of which has relief e]ements (blocks or ribs).
From French patent N 759,592 and its paten-t of addition N 43,3~3 it is known to divide the relief elements of the tread into a number of strips by means of numerous slits which are close to each other, in order to increase the adherence of the tires to snow-covered, slippery or wet ground.
French patent N 779,108 discloses the provision of thin metallic blades of suitable shape in the walls of the mold, in order to produce such slits or notches. In order to facili-tate the manufacture of the molds and the removal of the vulcanized tires from the molds, use is made of slits perpen-dicular to the surface of the tread, however, the slits may have any trace with respect to the longitudinal direction of the tire. These patents thus teach that instead of providing slits perpendicular to the surface of the tread, the slits may have any desired inclination with respect to said surface.
Perpendicular slits aIso improve the adherence of ~20 tlres on snow and lce. Howevex, winter tires frequently ~travel over roads which are free of snow or ice and it is then found, at the end of a certain number of miles, that the ~ improvement due to the perpendicular slits has decreased when ; these tires again travel on snow and ice. This decrease appears at the same time as the sharp edge formed by the leading edge of each of the slits ~seen in the direction of the tangential stresses on the tire exerted by the ground) becomes rounded. This is due to the deformations suffered by each of the rubber strips de~ined by two consecutive slits.
This phenomenon is particularly apparent on radical carcass tires, the tread of which is stabilized by a tread reinforce-ment of low deformability.
~9~7 The problem forming the basis of the invention is to overcome the decrease in adherence on snow and ice which results from the rounding of the leading edges of the strips defined by the sllts described above.
The pri.nciple of the solution in accordance with the invention resides in selecting the inclination of the slits with respect to the normal to the tread, and therefore o the strips defined by said slits, in SUC}I a ~anner as to avoid the rounding of the leading edges of the strips.
Thus, the tire in accordance with the invention, : :
having a tread comprising relief elements provided with slits inclined with .respect to the normal to the tread and which are close to each other and form s-trips between each other is characterized by the fact that, when the tire is no-t under load, the slits are inclined with respect to .said normal by an angle at most equal to 45 in the direction of the -tangential stresses on the tire exerted by the ground, and by the fact that these slits have a width which is other than zero.
It is advantageous to .incline the slits in accordance ~; 20 with the invention with due consideration of the orientation of the tangential stresses on the tire exerted by -the ground and of the eff0cts which it is desired to obtain - transverse : adherence, longitudinal adherence upon braking or acceleration. ~ ~ -Certain zones of the tread can:thus be treat0d diff0rently ; when selecting the trace of the slits and/or -th0ir inclination.
The drawing and the followi.ng description which refers thereto are intended to show the advantages of the inv0nt10n and its operation, as well as an illustra-tive embodiment.
In the drawing: :
~igs. 1 to ~ are views in longitudinal se~tion of a relie~ element provided with .slits in accordance with the .
invention and shown when the new tire is not under load (Fig. 1), when lt is under load (Fig. 2), when it starts to become worn but not under load (Fig. 3) and then under load (FigO ~).
Fig. 1 shows a relief element 10 of a tread (not shown) of a tire provided with slits 11 in accordance with the invention~ This relief element 10 is bounded by two relatively wide grooves 9 of a depth H. The slits 11 are close to each other and define strips 12, -the slits 11 have a width "e" and a depth "h". One of the walls 13 of the slits 11 forms, with the bearing surface 14 of the tread, the leading edge 15 of the strips 12 while the other wall 13' forms the trailing edge 16 of the strips 12. The slits 11 form an acute angle ~ with the normal N to the tread. E'rom one slit 11 to the next, the inclination a may vary by an amount at most equal to 30. The depth h, which is close to H, may vary fro.~ one slit 11 to the next in a ratio at most equal to 0.5. In the example shown, the slits 11 are inclined in the direction of rotation F of the tire. These slits 11 are active in case of longitudinal ~0 acceleration. In order to o~tain slits which are active in case of braking, it is-advisable to incllne the slits in the direction opposite the direction of rotation F. Similarly, slits which are active against centrifugal acceleration should be inclined towards the outside of the tire~with respect to the normal to the tread.
~ 1hen the new tire is under load and crushed on the ground 17 (Fig. 2), the strips 12 of the relief element 10 of Fig. 1 become deformed, the slits 11 closing. Due to the existence of these slits 11, the inclination ~ increases and becomes ~' and only the trailing edges 16 bear against the ground 17. After a certain period of travel, it is noted that the bearing surfaces 14 of the s-trips 12 have changed their .7 inclination as compared with their initial s-tate (Fig. 1) and become, in the tire when not under load (Fig. 3), inclined bearing surfaces 1~'.
Thus (Fig. 4), as a result of its wear, the trailing edge 16 of a strip frees, in the circumferential direction, the leading edge 15 o-f the following strip when the tire under load rests on the ground.
The inclination of the strips and their width makes it possible, in accordance with the invention, to cause directed wear of the bearing surfaces of the strips during a period of travel and then maintain the release of the leading edges once this is established. The effect of the invention is therefore practically independent of the degree of weax of the tread.
The suitable value of the inclination ~ of the slits, measured when the tire is not unde^ load, is at most equal to 45.
By way of exa~ple, the variation of the angle forming the leading edge of the strips in accordance with the invention can be evaluated in accordance with the following calculation in the case of strips intended to increase the longitudinal adherence.
Let:
- P be the pitch of the slits, that is to say the distance between the trailing edges of two consecutive strips of a group of strips of the tire not under load, - ~ be the inclination of the slits with respect to the normal to the tread of the tire not under loadr - ~' be the inclination of the sli-ts with respect to the normal to the tread due to the flexing of the strlps under Ihe effect of the load which cru~hes the tire, - e be the width of the slits measured perpendicular to the walls which form the slits of a tire not under load ~39~ 7 - E be the thickness of the strips of a tire not under load such that E = P cos a - e, - R be the radius of the tire not under load, and - d be the distance from the surface of the tread to the radially outermost tread reinforcement ply of the tire not under load; therefore the contraction of the pitch P of -the strips in the area of contact to a length pl is in accordance wi-th the known expression:
P = R - d P R
under these conditions:
cos a~ = P cos aj- e = R X P cos a - e = E . R
The decrease in the angle y formed by the leading edge after the commencement of wear of the tire in accordance with the invention is equal to the clifference between the angles (a - a') derived from -the above relations, -that is to say to the difference (arc cos a - arc cos ai).
In practice, it is recommended -to provide for a varlation of the angle b~ wear of be:tween O and 20 for the ~_ : leading edges of the strips by means of the above relations.
:
In the entire above description and in -the claims hich follow, the-word "slit" is to be understood as designating not only a slit which is linear in the directlon of its.depth and/or width but also a slit having any other trace, for instance curved, undulated, etc., whatever the sectional plane (longitudinal, transverse or oblique) considered.
"
.
. : .. :, .
From French patent N 759,592 and its paten-t of addition N 43,3~3 it is known to divide the relief elements of the tread into a number of strips by means of numerous slits which are close to each other, in order to increase the adherence of the tires to snow-covered, slippery or wet ground.
French patent N 779,108 discloses the provision of thin metallic blades of suitable shape in the walls of the mold, in order to produce such slits or notches. In order to facili-tate the manufacture of the molds and the removal of the vulcanized tires from the molds, use is made of slits perpen-dicular to the surface of the tread, however, the slits may have any trace with respect to the longitudinal direction of the tire. These patents thus teach that instead of providing slits perpendicular to the surface of the tread, the slits may have any desired inclination with respect to said surface.
Perpendicular slits aIso improve the adherence of ~20 tlres on snow and lce. Howevex, winter tires frequently ~travel over roads which are free of snow or ice and it is then found, at the end of a certain number of miles, that the ~ improvement due to the perpendicular slits has decreased when ; these tires again travel on snow and ice. This decrease appears at the same time as the sharp edge formed by the leading edge of each of the slits ~seen in the direction of the tangential stresses on the tire exerted by the ground) becomes rounded. This is due to the deformations suffered by each of the rubber strips de~ined by two consecutive slits.
This phenomenon is particularly apparent on radical carcass tires, the tread of which is stabilized by a tread reinforce-ment of low deformability.
~9~7 The problem forming the basis of the invention is to overcome the decrease in adherence on snow and ice which results from the rounding of the leading edges of the strips defined by the sllts described above.
The pri.nciple of the solution in accordance with the invention resides in selecting the inclination of the slits with respect to the normal to the tread, and therefore o the strips defined by said slits, in SUC}I a ~anner as to avoid the rounding of the leading edges of the strips.
Thus, the tire in accordance with the invention, : :
having a tread comprising relief elements provided with slits inclined with .respect to the normal to the tread and which are close to each other and form s-trips between each other is characterized by the fact that, when the tire is no-t under load, the slits are inclined with respect to .said normal by an angle at most equal to 45 in the direction of the -tangential stresses on the tire exerted by the ground, and by the fact that these slits have a width which is other than zero.
It is advantageous to .incline the slits in accordance ~; 20 with the invention with due consideration of the orientation of the tangential stresses on the tire exerted by -the ground and of the eff0cts which it is desired to obtain - transverse : adherence, longitudinal adherence upon braking or acceleration. ~ ~ -Certain zones of the tread can:thus be treat0d diff0rently ; when selecting the trace of the slits and/or -th0ir inclination.
The drawing and the followi.ng description which refers thereto are intended to show the advantages of the inv0nt10n and its operation, as well as an illustra-tive embodiment.
In the drawing: :
~igs. 1 to ~ are views in longitudinal se~tion of a relie~ element provided with .slits in accordance with the .
invention and shown when the new tire is not under load (Fig. 1), when lt is under load (Fig. 2), when it starts to become worn but not under load (Fig. 3) and then under load (FigO ~).
Fig. 1 shows a relief element 10 of a tread (not shown) of a tire provided with slits 11 in accordance with the invention~ This relief element 10 is bounded by two relatively wide grooves 9 of a depth H. The slits 11 are close to each other and define strips 12, -the slits 11 have a width "e" and a depth "h". One of the walls 13 of the slits 11 forms, with the bearing surface 14 of the tread, the leading edge 15 of the strips 12 while the other wall 13' forms the trailing edge 16 of the strips 12. The slits 11 form an acute angle ~ with the normal N to the tread. E'rom one slit 11 to the next, the inclination a may vary by an amount at most equal to 30. The depth h, which is close to H, may vary fro.~ one slit 11 to the next in a ratio at most equal to 0.5. In the example shown, the slits 11 are inclined in the direction of rotation F of the tire. These slits 11 are active in case of longitudinal ~0 acceleration. In order to o~tain slits which are active in case of braking, it is-advisable to incllne the slits in the direction opposite the direction of rotation F. Similarly, slits which are active against centrifugal acceleration should be inclined towards the outside of the tire~with respect to the normal to the tread.
~ 1hen the new tire is under load and crushed on the ground 17 (Fig. 2), the strips 12 of the relief element 10 of Fig. 1 become deformed, the slits 11 closing. Due to the existence of these slits 11, the inclination ~ increases and becomes ~' and only the trailing edges 16 bear against the ground 17. After a certain period of travel, it is noted that the bearing surfaces 14 of the s-trips 12 have changed their .7 inclination as compared with their initial s-tate (Fig. 1) and become, in the tire when not under load (Fig. 3), inclined bearing surfaces 1~'.
Thus (Fig. 4), as a result of its wear, the trailing edge 16 of a strip frees, in the circumferential direction, the leading edge 15 o-f the following strip when the tire under load rests on the ground.
The inclination of the strips and their width makes it possible, in accordance with the invention, to cause directed wear of the bearing surfaces of the strips during a period of travel and then maintain the release of the leading edges once this is established. The effect of the invention is therefore practically independent of the degree of weax of the tread.
The suitable value of the inclination ~ of the slits, measured when the tire is not unde^ load, is at most equal to 45.
By way of exa~ple, the variation of the angle forming the leading edge of the strips in accordance with the invention can be evaluated in accordance with the following calculation in the case of strips intended to increase the longitudinal adherence.
Let:
- P be the pitch of the slits, that is to say the distance between the trailing edges of two consecutive strips of a group of strips of the tire not under load, - ~ be the inclination of the slits with respect to the normal to the tread of the tire not under loadr - ~' be the inclination of the sli-ts with respect to the normal to the tread due to the flexing of the strlps under Ihe effect of the load which cru~hes the tire, - e be the width of the slits measured perpendicular to the walls which form the slits of a tire not under load ~39~ 7 - E be the thickness of the strips of a tire not under load such that E = P cos a - e, - R be the radius of the tire not under load, and - d be the distance from the surface of the tread to the radially outermost tread reinforcement ply of the tire not under load; therefore the contraction of the pitch P of -the strips in the area of contact to a length pl is in accordance wi-th the known expression:
P = R - d P R
under these conditions:
cos a~ = P cos aj- e = R X P cos a - e = E . R
The decrease in the angle y formed by the leading edge after the commencement of wear of the tire in accordance with the invention is equal to the clifference between the angles (a - a') derived from -the above relations, -that is to say to the difference (arc cos a - arc cos ai).
In practice, it is recommended -to provide for a varlation of the angle b~ wear of be:tween O and 20 for the ~_ : leading edges of the strips by means of the above relations.
:
In the entire above description and in -the claims hich follow, the-word "slit" is to be understood as designating not only a slit which is linear in the directlon of its.depth and/or width but also a slit having any other trace, for instance curved, undulated, etc., whatever the sectional plane (longitudinal, transverse or oblique) considered.
"
.
. : .. :, .
Claims (9)
1. Tire intended for winter travel, having a tread comprising relief elements provided with slits inclined with respect to the normal to the tread and which are close to each other and form strips between each other, characterized by the fact that, when the tire is not under load, the slits are inclined with respect to said normal by an angle at most equal to 45° in the direction of the tangential stresses on the tire exerted by the ground, and by the fact that these slits have a width which is other than zero.
2. Tire according to claim 1, characterized by the fact that the tread comprises relief elements provided with slits active in braking which are inclined in the direction opposite the direction of rotation of the tire.
3. Tire according to claim 1, characterized by the fact that the tread comprises relief elements provided with slits active in longitudinal acceleration which are inclined in the direction of rotation of the tire.
4. Tire according to claim 1, characterized by the fact that the tread comprises relief elements provided with slits active against centrifugal acceleration which are inclined towards the outside of the tire.
5. Tire according to claim 1, characterized by the fact that the tread comprises a radial carcass reinforcement surrounded by a tread reinforcement.
6. Tire according to claim 1, characterized by the fact that the leading edges of the strips are adapted to undergo variations of angles .alpha. - .alpha.' of between 0° and 20°, the angles .alpha. and .alpha.' resulting from the equations and , in which, when the tire is not under load, .alpha. is the inclination of the slits of width e with respect to the normal to the tread, P is the pitch of the slits, E is the thickness of the strips, d is the distance from the surface of the tread to the radially outermost tread reinforce-ment ply of the tire, and R is the radius of the tire; and in which, when the tire is under load, .alpha.' is the inclination of the slits with respect to the normal to the tread.
7. Tire according to claim 1, characterized by the fact that the inclination of the slits varies by an amount at most equal to 30° from one slit to the next.
8. Tire according to claim 1, characterized by the fact that the depth of the slits varies in a ratio at most equal to 0.5 from one slit to the next.
9. Tire according to claim 1, characterized by the fact that the thickness of a strip measured perpendicular to one of its walls varies in the radial and/or axial direction of the tire.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7806394A FR2418719A1 (en) | 1978-03-03 | 1978-03-03 | TIRE FOR RIDING ON SNOW |
| FR7806394 | 1978-03-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1098017A true CA1098017A (en) | 1981-03-24 |
Family
ID=9205407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA322,690A Expired CA1098017A (en) | 1978-03-03 | 1979-03-02 | Winter tire |
Country Status (16)
| Country | Link |
|---|---|
| JP (1) | JPS54124405A (en) |
| AT (1) | AT367690B (en) |
| BE (1) | BE874496A (en) |
| CA (1) | CA1098017A (en) |
| CH (1) | CH628293A5 (en) |
| DE (1) | DE2908219A1 (en) |
| DK (1) | DK151092C (en) |
| ES (1) | ES478246A1 (en) |
| FI (1) | FI790714A (en) |
| FR (1) | FR2418719A1 (en) |
| GB (1) | GB2017597B (en) |
| IT (1) | IT1119673B (en) |
| LU (1) | LU80985A1 (en) |
| NL (1) | NL180734C (en) |
| NO (1) | NO790720L (en) |
| SE (1) | SE459854B (en) |
Families Citing this family (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2461602A1 (en) * | 1979-07-24 | 1981-02-06 | Michelin & Cie | PNEUMATIC FOR ROLLING ON SNOW |
| DE3146362A1 (en) * | 1981-02-23 | 1982-09-02 | The General Tire & Rubber Co., 44329 Akron, Ohio | TIRE WITH IMPROVED TREAD |
| FR2544251B1 (en) * | 1983-04-12 | 1986-05-09 | Michelin & Cie | RELIEF ELEMENTS OF A TIRE TREAD COMPRISING WAVY OR BROKEN TRACK INCISIONS |
| DE3324649A1 (en) * | 1983-07-08 | 1985-01-31 | Continental Gummi-Werke Ag, 3000 Hannover | VEHICLE TIRES |
| JPS60240507A (en) * | 1984-05-15 | 1985-11-29 | Sumitomo Rubber Ind Ltd | Low noise multi-siping tire |
| JPS6168907U (en) * | 1984-10-13 | 1986-05-12 | ||
| JPH0741777B2 (en) * | 1986-04-14 | 1995-05-10 | オ−ツタイヤ株式会社 | Studless pneumatic tire |
| GB2192842B (en) * | 1986-06-13 | 1991-01-30 | Bridgestone Corp | Pneumatic tire |
| FR2643312B1 (en) * | 1989-02-22 | 1991-07-26 | Michelin & Cie | "HEAVYWEIGHT" TIRE TREAD, WITH CENTRAL RIBS WITH INCLINED INCISIONS |
| DE4232308A1 (en) * | 1992-09-26 | 1994-03-31 | Continental Ag | Radial tyre with more uniform wear - has raised blocks sepd. by longitudinal and lateral grooves with block trailing edges longer than leading edges. |
| DE4232306C2 (en) * | 1992-09-26 | 1995-09-21 | Continental Ag | Directional vehicle tire with transverse grooves |
| FR2703002B1 (en) * | 1993-03-25 | 1995-06-02 | Michelin & Cie | Tread for radial tire having elements in relief provided with incisions. |
| JP3312784B2 (en) * | 1993-07-28 | 2002-08-12 | 株式会社ブリヂストン | Pneumatic tire |
| JP3366737B2 (en) * | 1994-06-29 | 2003-01-14 | 株式会社ブリヂストン | Pneumatic tire |
| DE19650655C2 (en) * | 1996-12-06 | 2000-08-24 | Continental Ag | Vehicle tires with cuts in the tread |
| US6412531B1 (en) * | 1999-07-15 | 2002-07-02 | Michelin Recherche Et Technique S.A. | Tire tread having groove walls with compound contours |
| DE60209956T2 (en) * | 2001-05-14 | 2006-11-30 | Société de Technologie Michelin | Tread with inclination variable sipes containing ribs |
| JP4777547B2 (en) * | 2001-06-29 | 2011-09-21 | 株式会社ブリヂストン | Pneumatic tire |
| JP4223064B2 (en) | 2007-06-12 | 2009-02-12 | 横浜ゴム株式会社 | Pneumatic tire |
| JP4397956B1 (en) * | 2008-07-02 | 2010-01-13 | 横浜ゴム株式会社 | Pneumatic tire |
| JP4442709B2 (en) | 2008-09-12 | 2010-03-31 | 横浜ゴム株式会社 | Pneumatic tire |
| FR2956356B1 (en) | 2010-02-12 | 2012-06-08 | Michelin Soc Tech | TIRE FOR TWO - WHEELED VEHICLES COMPRISING A BEARING BAND HAVING A CIRCONFERENTIALLY CONTINUOUS CUT. |
| FR2956354A1 (en) | 2010-02-12 | 2011-08-19 | Michelin Soc Tech | TIRE FOR TWO - WHEELED VEHICLES COMPRISING A BEARING BAND HAVING INCISIONS. |
| FR2956357B1 (en) | 2010-02-12 | 2012-05-18 | Michelin Soc Tech | TIRE FOR TWO - WHEELED VEHICLES COMPRISING A BEARING BAND HAVING INCISIONS. |
| FR2956355B1 (en) | 2010-02-12 | 2012-05-18 | Michelin Soc Tech | TIRE FOR TWO - WHEELED VEHICLES COMPRISING A BEARING BAND HAVING INCISIONS. |
| FR2964600B1 (en) * | 2010-09-09 | 2014-08-22 | Michelin Soc Tech | TIRE TREAD FOR TIRES |
| JP5947532B2 (en) * | 2011-12-09 | 2016-07-06 | 株式会社ブリヂストン | Pneumatic tire |
| DE102011056762A1 (en) * | 2011-12-21 | 2013-06-27 | Continental Reifen Deutschland Gmbh | Arrangement of pneumatic vehicle tires on a vehicle |
| FR2998511B1 (en) | 2012-11-29 | 2014-12-26 | Michelin & Cie | TIRE TREAD FOR SNOW TIRES HAVING INCISIONS AND CAVITIES |
| JP6353934B2 (en) | 2014-06-30 | 2018-07-04 | コンパニー ゼネラール デ エタブリッスマン ミシュラン | Tire tread having a tread element with an inclined leading side |
| FR3034356B1 (en) | 2015-04-01 | 2018-08-10 | Compagnie Generale Des Etablissements Michelin | PNEUMATIC COMPRISING A TREAD |
| WO2018101933A1 (en) * | 2016-11-30 | 2018-06-07 | Compagnie Generale Des Etablissements Michelin | Improved tire treads having positively inclined sipes |
| JP7085427B2 (en) * | 2018-07-10 | 2022-06-16 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | Pneumatic tires |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR759592A (en) * | 1932-11-08 | 1934-02-05 | Michelin & Cie | Tire improvement |
| FR43383E (en) * | 1933-02-21 | 1934-05-11 | Michelin & Cie | Tire improvement |
| US2240542A (en) * | 1934-09-29 | 1941-05-06 | Michelin & Cie | Tire |
| FR819836A (en) * | 1936-06-29 | 1937-10-27 | Wheel tire, rubber | |
| US2339558A (en) * | 1942-03-21 | 1944-01-18 | Firestone Tire & Rubber Co | Tire |
| GB727207A (en) * | 1952-06-24 | 1955-03-30 | Goodrich Co B F | Improvements in or relating to a high speed tire |
| US3817308A (en) * | 1966-10-14 | 1974-06-18 | Tokyo Yakuhin Kaihatsu K K | Method of preparing a water-soluble powder containing active components from mineral spring waters of spas and product produced thereby |
| FR2461602A1 (en) * | 1979-07-24 | 1981-02-06 | Michelin & Cie | PNEUMATIC FOR ROLLING ON SNOW |
-
1978
- 1978-03-03 FR FR7806394A patent/FR2418719A1/en active Granted
-
1979
- 1979-02-27 BE BE193736A patent/BE874496A/en not_active IP Right Cessation
- 1979-02-28 DK DK085079A patent/DK151092C/en not_active IP Right Cessation
- 1979-03-01 SE SE7901861A patent/SE459854B/en not_active IP Right Cessation
- 1979-03-02 NO NO790720A patent/NO790720L/en unknown
- 1979-03-02 IT IT67456/79A patent/IT1119673B/en active
- 1979-03-02 JP JP2436979A patent/JPS54124405A/en active Granted
- 1979-03-02 GB GB7907476A patent/GB2017597B/en not_active Expired
- 1979-03-02 LU LU80985A patent/LU80985A1/en unknown
- 1979-03-02 CA CA322,690A patent/CA1098017A/en not_active Expired
- 1979-03-02 ES ES478246A patent/ES478246A1/en not_active Expired
- 1979-03-02 NL NLAANVRAGE7901681,A patent/NL180734C/en not_active IP Right Cessation
- 1979-03-02 CH CH210279A patent/CH628293A5/en not_active IP Right Cessation
- 1979-03-02 FI FI790714A patent/FI790714A/en not_active Application Discontinuation
- 1979-03-02 DE DE19792908219 patent/DE2908219A1/en active Granted
- 1979-03-05 AT AT0165379A patent/AT367690B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| GB2017597A (en) | 1979-10-10 |
| JPS54124405A (en) | 1979-09-27 |
| NL180734C (en) | 1987-04-16 |
| FR2418719B1 (en) | 1980-09-05 |
| NL180734B (en) | 1986-11-17 |
| IT7967456A0 (en) | 1979-03-02 |
| JPH0130641B2 (en) | 1989-06-21 |
| SE459854B (en) | 1989-08-14 |
| GB2017597B (en) | 1982-08-04 |
| AT367690B (en) | 1982-07-26 |
| SE7901861L (en) | 1979-09-04 |
| ES478246A1 (en) | 1979-11-01 |
| DE2908219C2 (en) | 1990-09-06 |
| DK151092C (en) | 1988-06-20 |
| DK151092B (en) | 1987-11-02 |
| DK85079A (en) | 1979-09-04 |
| CH628293A5 (en) | 1982-02-26 |
| LU80985A1 (en) | 1979-06-18 |
| FR2418719A1 (en) | 1979-09-28 |
| IT1119673B (en) | 1986-03-10 |
| FI790714A (en) | 1979-09-04 |
| NO790720L (en) | 1979-09-04 |
| BE874496A (en) | 1979-06-18 |
| NL7901681A (en) | 1979-09-05 |
| ATA165379A (en) | 1981-12-15 |
| DE2908219A1 (en) | 1979-09-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |