CA1259894A - Pneumatic tire for heavy vehicles - Google Patents
Pneumatic tire for heavy vehiclesInfo
- Publication number
- CA1259894A CA1259894A CA000507869A CA507869A CA1259894A CA 1259894 A CA1259894 A CA 1259894A CA 000507869 A CA000507869 A CA 000507869A CA 507869 A CA507869 A CA 507869A CA 1259894 A CA1259894 A CA 1259894A
- Authority
- CA
- Canada
- Prior art keywords
- groove
- tire
- circumferential
- projecting
- tread
- 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
Landscapes
- Tires In General (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A heavy duty pneumatic tire having a tread provided on its outer surface with ay least one circumferential grooves is disclosed, on the opposite groove walls of the said groove multiple projecting blocks are provided at a spac between adjoining projecting blocks in the circumferential direction corresponding to 10-50% of the circumferential length of the projecting block and between the projecting blocks a narrower groove is formed circumferentially having the open groove width corresponding to 5-50 % of the open groove width of the above mentioned wider circumferential groove.
A heavy duty pneumatic tire having a tread provided on its outer surface with ay least one circumferential grooves is disclosed, on the opposite groove walls of the said groove multiple projecting blocks are provided at a spac between adjoining projecting blocks in the circumferential direction corresponding to 10-50% of the circumferential length of the projecting block and between the projecting blocks a narrower groove is formed circumferentially having the open groove width corresponding to 5-50 % of the open groove width of the above mentioned wider circumferential groove.
Description
~59899~
PNEUMA~IC TIRE ~OR HEAYY VEHICLES
BACKG~OUND OP THE INVENTION
1. Field of the invention This invention relates to heavy duty pneumatic tire for use in heavy vehicles such as trucks a~d buses, having tread patterns incorporating anti-skid grooves of a shape to minimize stone pick-up and stone retention without reducing wet-grip performance of tires.
PNEUMA~IC TIRE ~OR HEAYY VEHICLES
BACKG~OUND OP THE INVENTION
1. Field of the invention This invention relates to heavy duty pneumatic tire for use in heavy vehicles such as trucks a~d buses, having tread patterns incorporating anti-skid grooves of a shape to minimize stone pick-up and stone retention without reducing wet-grip performance of tires.
2. Description of the prior Art Pneumatic tires are conventionally provided with a tread surface having an anti-skid pattern defined by circumferential grooves or, and transverse grooves which are molded in the surface of the tread during manufacture.
In general, a pneumatic tire has a tread patterns of the lug, rib, rib-lug, block, lug-block or rib-block pattern type which is selected in accordance with performances required for the tire depending on the use of the tire, seasonal factors, road conditions, etc. especially a pattern of tread grooves for heavy duty tires for use in heavy vehicles such as trucks and buses are mainly used with a tread pattern of the rib, rib-lug or rib-block type pattern with respect to the strong requirment for wet grip performance and long wear life tread performance.
However, such a tread Pattern baving circumferentially extending long-itudinal grooves has the following drawbacks when compared with the other tread patterns such as a lug-type pattern.
That is, stone pick-up is apt to occur in the circumferential groove.
If this occurs and the tires is driven, it is difficult to discharge stones from the groove due to the strong restraining force of the groove. As a result, the stones strike the base rubber between the bottom of the circumferential grooves and the reinforcement for the tread portion on the belt for every ~25~394 rotation of the tire and tend to cause the breakage of the base rubber and hence damage the belt layers or carcass plies inside the tread rubber. Particularly, when the belt is comprised of metal cords, rust is induced by penetrating water from the dam-aged portion of the base rubber in-to the belt or the carcass plies and as a result, separation failure of metal cords from the rubber is caused. Finally there is the fatal possibi~ity of dam-aging the durable life of the tire.
AS a countermeasure against such stone pick-up, lt has hitherto been proposed to arrange a groove with a step ~
shaped groove) continuously extending toward the circumferential direction of the tire on the groove walls of the longitudinal groove and to arrange a protruded stripe continuously extending toward the circumferential direction of the tire on the groove bottom. In the former case, the stone pick-up is somewhat pro-tected in the early skage of -the tire use by the wider groove and the narrower groove. However, when the wider grooves disappeared due to tread wear, only the narrower groove remalns, and as a result, there is problem to reduce the wet grip performance in the worn tire saving only the narrower groove. In the latter case, the base rubber on the groove bottom is somewhat protected, but it cannot practically and satisfactorily be expected to facilitate the discharge of picked up stones.
The present invention advantageously solves the afore-said problem without reducing the wet grip performance in pneu-matic tire for heavy vehicles having a rib-type tread pattern irrespective of having a carcass of bias or radial construction.
According to the present invention a heavy duty pneu-matic tire for heavy vehicles having a tread comprising at least one circurnferential groove provided on the surface of the tread, and extending zigzag in the circumferential direction of the tire to form alternating pro~ecting portions and re-entrant portions on the opposed groove walls thereof; a plurality of pro~ectlng 1~59~39a~
blocks within said circumferential groove and projecting oppo-sitely from the opposed groove walls under the tread surface to form a narrow groove between the axially ad~acent projecting blocks in the circumferential groove, and arranged circumferen-tially discon-tinuously to form a space between circumferentially adjoining projecting blocks at the projecting portion of the groove wall; the space between circumferentially adjoining pro-jecting blocks being in a range of 10% to 50% of the circumferen-tial length of the projecting block; and at least one cut in the lo pro;ecting block, and extending radially to the circumEerential groove. Suitably the open tip width of the narrow groove is in the range of 5% to 50% of the open top width of the circumferen-tial groove. Desirably the narrow groove is of zigzag form whose angle to the circumferential direction of the tire is smaller than the angle of the zigzag of the circumferential groove to the circumferential direction of the tire. Suitably the width of the cut is under 2 mm. Preferably the depth of the cut is almost the same as the depth of the narrow groove.
Thus, according to the present invention a heavy duty pneumatic tire having a tread provided on its outer surface with at least one circumferential groove, the blocks thereof are intermittently arranged on both groove walls of the aforemen-tioned circumferential groove from the groove bottom and the sur-face of the projecting blocks is under the outer surface of the tire, and between the projecting blocks on the opposite groove wall to each other, the circumferential narrower groove is to be arranged to divide both opposite projecting blocks in the axial direction.
; 30 The present invention will be explained in more detail referred to the accompanying drawings, in which:
Fig. l is a developed plan view of an embodiment of the tread portion in the tire according to this invention;
~259~9~
Fig. 2 is an enlarged view of a circumferential groove embodying this invention;
Fig.s 3, 4 and 5 are sectional views taken along the line A-A of Fig. 2; and Fig. 6 shows the results of the tests conducted to com-pare th~ conventional rib pattarn and the pattern embodying this invention in respect of the relation between the number of picked up stones and the travelling distance.
~ eferring to Fig. l, a heavy duty pneumatic tire 1 has at least one circumferentially extending longitudinal grooves 2, and number of the projecting blocks 5 to be defined by the nar-rower groove 4 are intermittently arranged extending toward thecircumferential direction of the tire on the groove walls 3 of the circumferential longitudinal grooves 2. In a preferred embodiment of the pneumatic tire of the present invention a lon-gitudinal groove with a narrower longitudinal groove has a zigzag groove form and projecting blocks 5 - 3a -~ Z59~39~
have a number of knife cut 6 spaced at a preferable pitch.
On the groove wall 3 of the cicumferential groove 2 are disposed plural projecting block 5 each extending from on the groove base 7 of the longitudinal groove 2 and b0ing defined by a split part 8 arranged at the corners of respective groove wall 3, and the interval ~2 of between the adjoin-ing projecting blocks 5-5 is approximatelY 10 to 50 % of the circumferential length el of each projecting block. The upper surface 5a of the Projecting block 5 is at a distance Hl the tread surface G and having a step 9, where height ~1 is arranged to be 0.2 to 0.8 time of the height H of longitudinal groove 2.
The upper sarface 5a of block 5 is generally parallel to the tread surface G when it leans toward the axial direction or the circumferential direction of the tire can be used as another embodiment of the present invention, forexample, as shown in ~IG.4, its upper surface 5a leans to be higher toward the narrow groove 4 than at the groove wall 3 or as shown in FIG.5 its upper surface 5a leans to be lower toward the narrow groove 4 than at the groove wall 3.
The groove width Wl of the aforesaid narrower groove 4 which defines the projectin~ blocks in the axial direction is preferably to be 5 to 50% of the groove width W of the longitudinal groove 2 to drainage performance.
the lowering of wet grip performance by wearing down of the longitudinal wider groove 2 can be prevented by adopting such arrangement as the angle K2 of the zig-zag form of thr narrower groove 4 extending in the circumferential direction of the tire should be smaller than the angle Kl of the zig-zag form of the longitudinal groove 2.
The knife cuts 6 arranged to have about 2 mm width on the projecting block 5 extend toward the axial direction of the tire and its depth is the sameas the depth of the narrower groove. The knife cuts 6 work to increase the drainage efficiency, when the surface 5~ of the projecting block 5 beglm to contact the road surface after the longitudinal wider groove 2 disappeared due to wear down.
85~
As aforementioned, when the tread rubber wear down to the extent where the wider groove of the longitudinal groove 2 disappears, the narrower groove 4appears on the tread surface and the groove width contacting with road suddenlybecome narrower to Wl from W in the case of ~IG.3.
However, after the longitudinal wider groove 2 disappears, the split parts 8 having a beforesaid spaces ~ 2 which are arranged between projecting blocks 5 assume the function to work as a traverse groove to maintain the wet grip performance. Accordingly, if the beforesaid space Q 2 is less than 10 %
of the circumferential length ~ 1, of the block 5,the wet grip performance become to be insufficient, on th~ other hand, if e2 is more than 50% of the circumferential length ~ 1 of the block 5, there is a tendency toword non-uniform or the uneven wear of the edges 5b of the block 5, after the continuoustravel of the tires over a long distance for a long period of time.
According to the present invention, if obstructions scattered on a road surface such as ground stones and the like are picked up by the circumferential grooves, the block 5 prevent bitten stones from reaching to thebase rubber between the botto~ of the circumferential grooves and the reinforcement or the belt for the tread portion and causing the breakage of base rubber and damaging the reinforcement or the belt inside the base rubber and the bottom of the circumferential groove has such a step that the dischargeof picke up stones is facilitated.
~ urthermore the projecting blocks have a function to control the movement of the rib portion 10 at the ground contact area for every rotation ofthe tires and to prevent rib edges from sufferin~ the uneven wear.
As stated hereinbefore, the invention effectively and adequately solves the harmful influence of stone pick-up at the tread groove by arranging a pluality of projectingt blocks on both groove walls of longitudinal grooves ofa so-called rib-type tread pattern irrespective where the carcass is of bias orradial construction without raising other serious defects particularly without lowering the wet grip performance even if the circumferential grooves having a wide open groove width due to wear.
The effectiveness of the present invention was confirmed by the following tes$ with respect to two tires A and B having the same open groove width of the circumferential groove, wherein the tire A is the above illustrated tire having the tread pattern with a circumferential groove with the proj~ctingblocks intermittently disposed on the opposed groove walls thereof as sho~n in FIG.l,~IG.2, FI6.3 and the tire B is a prior art tire having a U-shaped circumferential groove without the projecting blocks S as shown in FIG.l.
The detailed specifications on test tires are shown in the following table 1.
Table 1 _ A B
Wider open groove width of the longitudinal groove W ~mm) 13.0 13.0 Angle of the ~ig-zag form of a longitudinal groove ~1 ( ) 17.0 17.0 Circumferential length of the projecting block ~ 1 (mm3 25.0 Space between the projecting brocks e 2 (mm) 5.0 Depth of the longitudinal groove N (mm) 14.5 14.5 . _ Height of the step on the projecting blocks Hl ~mm) 5.U
_ Narrower groove width between projecting block Wl ~mm~ 3.0 _ Angle of the zig-~ag form of the oarrower groove ~2 ( ) 15.0 _ Degree of damages by stone pick-up on the groove bottom 0.2 2.4 ~259894 Test conditions are as follows :
~ adial tires of 10.00 R20,14PR. having steel cord layers for reinforcing belts and rims of 7.50V x 20 were tested with an inner pressure of 7.25~g / c~ and subjected to a load of 2,700kg on a tire and traveling speed was about 50 to 70 km / h.
The degree of damages by stone pick-up on the hottom of the circumferential groove and the number of stones picked up in the circumferential groove of each tire were measured respectively with respect to the traveling distance.
The relation between the traveling distance and the number of picked up sto~es was shown in FIG.6, from which'"it can be recongnized that the tire A
according to the,present invention hardly produces the stone pick-up, and any degree of damages in the table 1 means the rate of suffering damages on the groove bottom by the stone picked up and the great improvement of the tire A isshown.
In general, a pneumatic tire has a tread patterns of the lug, rib, rib-lug, block, lug-block or rib-block pattern type which is selected in accordance with performances required for the tire depending on the use of the tire, seasonal factors, road conditions, etc. especially a pattern of tread grooves for heavy duty tires for use in heavy vehicles such as trucks and buses are mainly used with a tread pattern of the rib, rib-lug or rib-block type pattern with respect to the strong requirment for wet grip performance and long wear life tread performance.
However, such a tread Pattern baving circumferentially extending long-itudinal grooves has the following drawbacks when compared with the other tread patterns such as a lug-type pattern.
That is, stone pick-up is apt to occur in the circumferential groove.
If this occurs and the tires is driven, it is difficult to discharge stones from the groove due to the strong restraining force of the groove. As a result, the stones strike the base rubber between the bottom of the circumferential grooves and the reinforcement for the tread portion on the belt for every ~25~394 rotation of the tire and tend to cause the breakage of the base rubber and hence damage the belt layers or carcass plies inside the tread rubber. Particularly, when the belt is comprised of metal cords, rust is induced by penetrating water from the dam-aged portion of the base rubber in-to the belt or the carcass plies and as a result, separation failure of metal cords from the rubber is caused. Finally there is the fatal possibi~ity of dam-aging the durable life of the tire.
AS a countermeasure against such stone pick-up, lt has hitherto been proposed to arrange a groove with a step ~
shaped groove) continuously extending toward the circumferential direction of the tire on the groove walls of the longitudinal groove and to arrange a protruded stripe continuously extending toward the circumferential direction of the tire on the groove bottom. In the former case, the stone pick-up is somewhat pro-tected in the early skage of -the tire use by the wider groove and the narrower groove. However, when the wider grooves disappeared due to tread wear, only the narrower groove remalns, and as a result, there is problem to reduce the wet grip performance in the worn tire saving only the narrower groove. In the latter case, the base rubber on the groove bottom is somewhat protected, but it cannot practically and satisfactorily be expected to facilitate the discharge of picked up stones.
The present invention advantageously solves the afore-said problem without reducing the wet grip performance in pneu-matic tire for heavy vehicles having a rib-type tread pattern irrespective of having a carcass of bias or radial construction.
According to the present invention a heavy duty pneu-matic tire for heavy vehicles having a tread comprising at least one circurnferential groove provided on the surface of the tread, and extending zigzag in the circumferential direction of the tire to form alternating pro~ecting portions and re-entrant portions on the opposed groove walls thereof; a plurality of pro~ectlng 1~59~39a~
blocks within said circumferential groove and projecting oppo-sitely from the opposed groove walls under the tread surface to form a narrow groove between the axially ad~acent projecting blocks in the circumferential groove, and arranged circumferen-tially discon-tinuously to form a space between circumferentially adjoining projecting blocks at the projecting portion of the groove wall; the space between circumferentially adjoining pro-jecting blocks being in a range of 10% to 50% of the circumferen-tial length of the projecting block; and at least one cut in the lo pro;ecting block, and extending radially to the circumEerential groove. Suitably the open tip width of the narrow groove is in the range of 5% to 50% of the open top width of the circumferen-tial groove. Desirably the narrow groove is of zigzag form whose angle to the circumferential direction of the tire is smaller than the angle of the zigzag of the circumferential groove to the circumferential direction of the tire. Suitably the width of the cut is under 2 mm. Preferably the depth of the cut is almost the same as the depth of the narrow groove.
Thus, according to the present invention a heavy duty pneumatic tire having a tread provided on its outer surface with at least one circumferential groove, the blocks thereof are intermittently arranged on both groove walls of the aforemen-tioned circumferential groove from the groove bottom and the sur-face of the projecting blocks is under the outer surface of the tire, and between the projecting blocks on the opposite groove wall to each other, the circumferential narrower groove is to be arranged to divide both opposite projecting blocks in the axial direction.
; 30 The present invention will be explained in more detail referred to the accompanying drawings, in which:
Fig. l is a developed plan view of an embodiment of the tread portion in the tire according to this invention;
~259~9~
Fig. 2 is an enlarged view of a circumferential groove embodying this invention;
Fig.s 3, 4 and 5 are sectional views taken along the line A-A of Fig. 2; and Fig. 6 shows the results of the tests conducted to com-pare th~ conventional rib pattarn and the pattern embodying this invention in respect of the relation between the number of picked up stones and the travelling distance.
~ eferring to Fig. l, a heavy duty pneumatic tire 1 has at least one circumferentially extending longitudinal grooves 2, and number of the projecting blocks 5 to be defined by the nar-rower groove 4 are intermittently arranged extending toward thecircumferential direction of the tire on the groove walls 3 of the circumferential longitudinal grooves 2. In a preferred embodiment of the pneumatic tire of the present invention a lon-gitudinal groove with a narrower longitudinal groove has a zigzag groove form and projecting blocks 5 - 3a -~ Z59~39~
have a number of knife cut 6 spaced at a preferable pitch.
On the groove wall 3 of the cicumferential groove 2 are disposed plural projecting block 5 each extending from on the groove base 7 of the longitudinal groove 2 and b0ing defined by a split part 8 arranged at the corners of respective groove wall 3, and the interval ~2 of between the adjoin-ing projecting blocks 5-5 is approximatelY 10 to 50 % of the circumferential length el of each projecting block. The upper surface 5a of the Projecting block 5 is at a distance Hl the tread surface G and having a step 9, where height ~1 is arranged to be 0.2 to 0.8 time of the height H of longitudinal groove 2.
The upper sarface 5a of block 5 is generally parallel to the tread surface G when it leans toward the axial direction or the circumferential direction of the tire can be used as another embodiment of the present invention, forexample, as shown in ~IG.4, its upper surface 5a leans to be higher toward the narrow groove 4 than at the groove wall 3 or as shown in FIG.5 its upper surface 5a leans to be lower toward the narrow groove 4 than at the groove wall 3.
The groove width Wl of the aforesaid narrower groove 4 which defines the projectin~ blocks in the axial direction is preferably to be 5 to 50% of the groove width W of the longitudinal groove 2 to drainage performance.
the lowering of wet grip performance by wearing down of the longitudinal wider groove 2 can be prevented by adopting such arrangement as the angle K2 of the zig-zag form of thr narrower groove 4 extending in the circumferential direction of the tire should be smaller than the angle Kl of the zig-zag form of the longitudinal groove 2.
The knife cuts 6 arranged to have about 2 mm width on the projecting block 5 extend toward the axial direction of the tire and its depth is the sameas the depth of the narrower groove. The knife cuts 6 work to increase the drainage efficiency, when the surface 5~ of the projecting block 5 beglm to contact the road surface after the longitudinal wider groove 2 disappeared due to wear down.
85~
As aforementioned, when the tread rubber wear down to the extent where the wider groove of the longitudinal groove 2 disappears, the narrower groove 4appears on the tread surface and the groove width contacting with road suddenlybecome narrower to Wl from W in the case of ~IG.3.
However, after the longitudinal wider groove 2 disappears, the split parts 8 having a beforesaid spaces ~ 2 which are arranged between projecting blocks 5 assume the function to work as a traverse groove to maintain the wet grip performance. Accordingly, if the beforesaid space Q 2 is less than 10 %
of the circumferential length ~ 1, of the block 5,the wet grip performance become to be insufficient, on th~ other hand, if e2 is more than 50% of the circumferential length ~ 1 of the block 5, there is a tendency toword non-uniform or the uneven wear of the edges 5b of the block 5, after the continuoustravel of the tires over a long distance for a long period of time.
According to the present invention, if obstructions scattered on a road surface such as ground stones and the like are picked up by the circumferential grooves, the block 5 prevent bitten stones from reaching to thebase rubber between the botto~ of the circumferential grooves and the reinforcement or the belt for the tread portion and causing the breakage of base rubber and damaging the reinforcement or the belt inside the base rubber and the bottom of the circumferential groove has such a step that the dischargeof picke up stones is facilitated.
~ urthermore the projecting blocks have a function to control the movement of the rib portion 10 at the ground contact area for every rotation ofthe tires and to prevent rib edges from sufferin~ the uneven wear.
As stated hereinbefore, the invention effectively and adequately solves the harmful influence of stone pick-up at the tread groove by arranging a pluality of projectingt blocks on both groove walls of longitudinal grooves ofa so-called rib-type tread pattern irrespective where the carcass is of bias orradial construction without raising other serious defects particularly without lowering the wet grip performance even if the circumferential grooves having a wide open groove width due to wear.
The effectiveness of the present invention was confirmed by the following tes$ with respect to two tires A and B having the same open groove width of the circumferential groove, wherein the tire A is the above illustrated tire having the tread pattern with a circumferential groove with the proj~ctingblocks intermittently disposed on the opposed groove walls thereof as sho~n in FIG.l,~IG.2, FI6.3 and the tire B is a prior art tire having a U-shaped circumferential groove without the projecting blocks S as shown in FIG.l.
The detailed specifications on test tires are shown in the following table 1.
Table 1 _ A B
Wider open groove width of the longitudinal groove W ~mm) 13.0 13.0 Angle of the ~ig-zag form of a longitudinal groove ~1 ( ) 17.0 17.0 Circumferential length of the projecting block ~ 1 (mm3 25.0 Space between the projecting brocks e 2 (mm) 5.0 Depth of the longitudinal groove N (mm) 14.5 14.5 . _ Height of the step on the projecting blocks Hl ~mm) 5.U
_ Narrower groove width between projecting block Wl ~mm~ 3.0 _ Angle of the zig-~ag form of the oarrower groove ~2 ( ) 15.0 _ Degree of damages by stone pick-up on the groove bottom 0.2 2.4 ~259894 Test conditions are as follows :
~ adial tires of 10.00 R20,14PR. having steel cord layers for reinforcing belts and rims of 7.50V x 20 were tested with an inner pressure of 7.25~g / c~ and subjected to a load of 2,700kg on a tire and traveling speed was about 50 to 70 km / h.
The degree of damages by stone pick-up on the hottom of the circumferential groove and the number of stones picked up in the circumferential groove of each tire were measured respectively with respect to the traveling distance.
The relation between the traveling distance and the number of picked up sto~es was shown in FIG.6, from which'"it can be recongnized that the tire A
according to the,present invention hardly produces the stone pick-up, and any degree of damages in the table 1 means the rate of suffering damages on the groove bottom by the stone picked up and the great improvement of the tire A isshown.
Claims (5)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A heavy duty pneumatic tire for heavy vehicles hav-ing a tread comprising at least one circumferential groove pro-vided on the surface of the tread, and extending zigzag in the circumferential direction of the tire to form alternating pro-jecting portions and re-entrant portions on the opposed groove walls thereof; a plurality of projecting blocks within said cir-cumferential groove and projecting oppositely from the opposed groove walls under the tread surface to form a narrow groove between the axially adjacent projecting blocks in the circumfer-ential groove, and arranged circumferentially discontinuously to form a space between circumferentially adjoining projecting blocks at the projecting portion of the groove wall; the space between circumferentially adjoining projecting blocks being in a range of 10% to 50% of the circumferential length of the project-ing block; and at least one cut in the projecting block, and extending radially to the circumferential groove.
2. The tire of claim 1, wherein the open tip width of the narrow groove is in the range of 5% to 50% of the open top width of the circumferential groove.
3. The tire of claim 1, wherein the narrow groove is of zigzag form whose angle to the circumferential direction of the tire is smaller than the angle of the zigzag of the circum-ferential groove to the circumferential direction of the tire.
4. The tire of claim 1, wherein the width of the cut is under 2 mm.
5. The tire of claim 1, wherein the depth of the cut is almost the same as the depth of the narrow groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000507869A CA1259894A (en) | 1986-04-29 | 1986-04-29 | Pneumatic tire for heavy vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000507869A CA1259894A (en) | 1986-04-29 | 1986-04-29 | Pneumatic tire for heavy vehicles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1259894A true CA1259894A (en) | 1989-09-26 |
Family
ID=4132998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000507869A Expired CA1259894A (en) | 1986-04-29 | 1986-04-29 | Pneumatic tire for heavy vehicles |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1259894A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113993721A (en) * | 2019-06-07 | 2022-01-28 | 大陆轮胎德国有限公司 | Pneumatic tire for vehicle |
-
1986
- 1986-04-29 CA CA000507869A patent/CA1259894A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113993721A (en) * | 2019-06-07 | 2022-01-28 | 大陆轮胎德国有限公司 | Pneumatic tire for vehicle |
| CN113993721B (en) * | 2019-06-07 | 2023-10-24 | 大陆轮胎德国有限公司 | Pneumatic tire for vehicle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4703788A (en) | Tire tread with zig-zag grooves with projections in groove | |
| EP0640498B1 (en) | Tread for pneumatic tire and tire comprising such a tread | |
| EP3303008B1 (en) | A tyre for vehicle wheels | |
| JP4246381B2 (en) | Industrial pneumatic tires | |
| CA1158533A (en) | Heavy duty pneumatic tires | |
| US6116309A (en) | Tread for a tire including five rib parts | |
| EP0844107A2 (en) | Pneumatic tyre | |
| EP0855292B1 (en) | Tyre and tread band for tyres, in particular for lorries and the like | |
| US4955415A (en) | Pneumatic radial tire with groove platforms to prevent stone entrapment | |
| US5665184A (en) | Heavy duty pneumatic tire | |
| EP2234822B1 (en) | Tyre for vehicle wheels | |
| US5538060A (en) | Pneumatic tire having tread portion including blocks | |
| EP0227322B1 (en) | Heavy duty pneumatic tyre | |
| EP0369932B1 (en) | Vehicle tire | |
| US4320790A (en) | Tire treads | |
| US4446901A (en) | Heavy duty pneumatic radial tires | |
| EP0912355B1 (en) | A convertible tread for a radial truck or trailer tire | |
| US5549146A (en) | Vehicle tire with wiper rib member | |
| CA2219394C (en) | Pneumatic tire for heavy duty | |
| CA2054424A1 (en) | Tread, with improved groove design | |
| JPS6092904A (en) | Pneumatic tire for large-sized car | |
| KR101268894B1 (en) | Tire with lamelle in bridge | |
| CA1259894A (en) | Pneumatic tire for heavy vehicles | |
| JP4053662B2 (en) | Pneumatic radial tire | |
| JPH1024705A (en) | Pneumatic tire |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |