JPS57194104A - Double-layer tread radial tyre - Google Patents

Double-layer tread radial tyre

Info

Publication number
JPS57194104A
JPS57194104A JP56078522A JP7852281A JPS57194104A JP S57194104 A JPS57194104 A JP S57194104A JP 56078522 A JP56078522 A JP 56078522A JP 7852281 A JP7852281 A JP 7852281A JP S57194104 A JPS57194104 A JP S57194104A
Authority
JP
Japan
Prior art keywords
tread
groove
rubber
arc
hardness
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.)
Pending
Application number
JP56078522A
Other languages
Japanese (ja)
Inventor
Katsunori Hiyouda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Rubber Industries Ltd
Original Assignee
Sumitomo Rubber Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sumitomo Rubber Industries Ltd filed Critical Sumitomo Rubber Industries Ltd
Priority to JP56078522A priority Critical patent/JPS57194104A/en
Publication of JPS57194104A publication Critical patent/JPS57194104A/en
Pending legal-status Critical Current

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
    • B60C11/14—Anti-skid inserts, e.g. vulcanised into the tread band
    • B60C11/18—Anti-skid inserts, e.g. vulcanised into the tread band of strip form, e.g. metallic combs, rubber strips of different wear resistance
    • 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
    • B60C2011/0337—Tread patterns characterised by particular design features of the pattern
    • B60C2011/0339—Grooves
    • B60C2011/0341—Circumferential grooves
    • B60C2011/0346—Circumferential grooves with zigzag shape
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction 

Abstract

PURPOSE:To improve a rolling resistance for preventing generation of TGC (generation of crack at the bottom of a groove) by making up a double layer tread of a base rubber having certain hardness and a cap tread rubber having certain hardness and thickness and by continuing the side part of the tread groove to the bottom thereof in the arc form. CONSTITUTION:A tread is made up of a base rubber 2 having a JIS hardness below 50 and a cap tread rubber 3 having hardness 10 or more higher than that of the base rubber and thickness over 0.9mm. from the bottom of the groove. Tread grooves 4 are formed in the middle of the tread within 70% of the width thereof. An area from the side walls 6 of the groove 4 to the groove bottom 7 is formed into an arc. The radius of the arc is set to >=1mm.. This constitution may scatter and moderate distortion at the boundary between the side walls 6 of the groove 4 and the bottom 7 thereof, preventing generation of crack and maintaining the rolling resistance at a high level.
JP56078522A 1981-05-22 1981-05-22 Double-layer tread radial tyre Pending JPS57194104A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56078522A JPS57194104A (en) 1981-05-22 1981-05-22 Double-layer tread radial tyre

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56078522A JPS57194104A (en) 1981-05-22 1981-05-22 Double-layer tread radial tyre

Publications (1)

Publication Number Publication Date
JPS57194104A true JPS57194104A (en) 1982-11-29

Family

ID=13664255

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56078522A Pending JPS57194104A (en) 1981-05-22 1981-05-22 Double-layer tread radial tyre

Country Status (1)

Country Link
JP (1) JPS57194104A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01141103A (en) * 1987-11-25 1989-06-02 Sumitomo Rubber Ind Ltd Pneumatic radial tyre
JPH03208707A (en) * 1989-10-23 1991-09-11 Bridgestone Corp Tread of pneumatic radial tire for heavy load
JPH11310019A (en) * 1998-04-30 1999-11-09 Bridgestone Corp Pneumatic tire for passenger car

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55106803A (en) * 1979-02-08 1980-08-16 Yokohama Rubber Co Ltd:The Low rolling resistant radial tire for automobile
JPS5639904A (en) * 1979-09-01 1981-04-15 Bridgestone Corp Radial tire for passenger car with low rolling resistance

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55106803A (en) * 1979-02-08 1980-08-16 Yokohama Rubber Co Ltd:The Low rolling resistant radial tire for automobile
JPS5639904A (en) * 1979-09-01 1981-04-15 Bridgestone Corp Radial tire for passenger car with low rolling resistance

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01141103A (en) * 1987-11-25 1989-06-02 Sumitomo Rubber Ind Ltd Pneumatic radial tyre
JPH03208707A (en) * 1989-10-23 1991-09-11 Bridgestone Corp Tread of pneumatic radial tire for heavy load
US5720831A (en) * 1989-10-23 1998-02-24 Bridgestone Corporation Tread of heavy duty pneumatic radial tire
JPH11310019A (en) * 1998-04-30 1999-11-09 Bridgestone Corp Pneumatic tire for passenger car

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