EP0167283A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Pneumatic tyres
Assignee: Dunlop Ltd
•
Filing: 1985-06-03
•
Granted: —
•
Expires: 2005-06-03
Abstract
Abstract A TD tyre having a toe portion (5) and a portion (9) of the bead region (4) adjacent thereto radially inwards of the bead core (6) and on the inside of the tyre carcass (1) having a hardness greater than 70° Shore A.
Inventors
- 👤 John Edwin Lewis Bramma
- 👤 Peter David Westwell
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 13:56
CPC Classifications
B; B60; B60C; B60C15/00; B60C15/06; B60C15/02; B60C15/024
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
110 words
A tyre comprising a carcass (1) and a pair of bead regions (4) each containing a substantially inextensible annular bead core (6) wherein at least one of the bead regions (4) is provided with an axially and radially inwardly projecting toe portion (5), the extended toe portion (5) comprising elastomeric material, being flexible perpendicular to its length and substantially rigid in the direction of its length characterised in that the portion of the bead region (4) adjacent to the toe portion (5) but radially outwards of the bead core (6) and on the inside of the tyre carcass comprises elastomeric material has a hardness of greater than 70 Shore A.
Claim 2
Dependent Claim
110 words
A tyre comprising a carcass (1) and a pair of bead regions (4) each containing a substantially inextensible annular bead core (6) wherein at least one of the bead regions (4) is provided with an axially and radially inwardly projecting toe portion (5), the extended toe portion (5) comprising elastomeric material, being flexible perpendicular to its length and substantially rigid in the direction of its length characterised in that the portion of the bead region (4) adjacent to the toe portion (5) but radially outwards of the bead core (6) and on the inside of the tyre carcass comprises elastomeric material has a hardness of greater than 70 Shore A.
Claim 3
Dependent Claim
40 words
A tyre according to Claim 1 characterised in that said portion (9) extends radially outwards to a height of between 2 and 6 times the bead core (6) cross-sectional diameter measured radially from the centre of the bead core cross-section.
Claim 4
Dependent Claim
40 words
A tyre according to Claim 1 or Claim 2 characterised in that said portion (9) extends radially outwards to a height of 5.2 times the bead core (6) cross-sectional diameter measured radially from the centre of the bead core cross-section.
Claim 5
Dependent Claim
41 words
A tyre according to any one of the preceding . claims characterised in that the said portion (9) of elastomeric material comprises substantially all of the material between the carcass ply (1) and the inner surface of the tyre bead (4).
Claim 6
Dependent Claim
32 words
A tyre according to any one of the preceding claims characterised in that the said portion (9) of elastomeric material has a hardness in the range 80 - 96° Shore A .
Claim 7
Dependent Claim
27 words
A tyre according to any one of the preceding claims characterised in that the said portion (9) of elastomeric material is integral with the toe portion (5).
Claim 8
Dependent Claim
31 words
A tyre according to any one of the preceding claims characterised in that a chafer strip (13) of reinforcement fabric is provided at the outer surface of the said portion (9).
Claim 9
Dependent Claim
28 words
8 . A tyre according to Claim 7 characterised in that the said chafer strip (13) is an extension of a chafer strip for the toe portion (12).
Claim 10
Dependent Claim
36 words
A tyre according to Claim 7 or Claim 8 characterised in that the said chafer strip (13) extends radially outwards of the bead core (6) centre for 2 - 6 times the bead core cross-sectional diameter.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.