EP0110597A2
Expired / Lapsed
EP
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Pneumatic radial tires
Assignee: Bridgestone Corp
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Filing: 1983-11-09
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Granted: —
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Expires: 2003-11-09
Abstract
Abstract A highly durable pneumatic radial tire, wherein steel cords each made from particular steel filaments are used in at least one of the belt and the carcass. The steel filaments have a pearlite structure having an average value of lamellar distance (h f ) between cementite layers (1) of 300-500Å, and a tensile strength of not less than 220 kgf/mm 2 .
Inventors
- 👤 Takao Ogino
- 👤 Yoichi Watanabe
- 👤 Shigehisa Sano
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 12:01
CPC Classifications
D; D07; D07B; D07B1/00; D07B1/06; D07B1/0606; D07B1/066; B; B60; B60C; B60C9/00; B60C9/0007; C; C21; C21D; C21D9/00; C21D9/52; C21D9/525; D07B2205/00; D07B2205/30; D07B2205/3021; D07B2205/3025; D07B2205/3035
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
106 words
A pneumatic radial tire comprising a tread portion, a pair of side portions extending from the tread portion, a pair of bead portions at the ends of the side portions remote from the tread portion, and a carcass reinforced with a belt embedded in the tread portion, characterized in that steel cords each obtained by twisting a plurality of steel filaments of a pearlite structure each having an average value of lamellar distance (h f ) between cementite 0 layers (1) of 300-500A and a tensile strength of not less than 220 kgf/mm 2 are used in at least one of the belt and the carcass.
Claim 2
Dependent Claim
106 words
A pneumatic radial tire comprising a tread portion, a pair of side portions extending from the tread portion, a pair of bead portions at the ends of the side portions remote from the tread portion, and a carcass reinforced with a belt embedded in the tread portion, characterized in that steel cords each obtained by twisting a plurality of steel filaments of a pearlite structure each having an average value of lamellar distance (h f ) between cementite 0 layers (1) of 300-500A and a tensile strength of not less than 220 kgf/mm 2 are used in at least one of the belt and the carcass.
Claim 3
Dependent Claim
42 words
A tire as claimed in claim 1, characterized in that the said steel cord applied to at least one of the belt and the carcass is covered with a coating rubber having a modulus at 50% elongation of 10-40 kgf/cm 2 .
References Cited (Backward Citations)
No citation records indexed.
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