Patent EP0174147A2 successfully refreshed from Google Patents.
EP0174147A2
Expired / Lapsed
EP
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Airplane tyre
Assignee: Sumitomo Rubber Industries Ltd
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Filing: 1985-08-27
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Granted: —
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Expires: 2005-08-27
Abstract
Abstract A tyre for an airplane having a carcass comprising carcass reinforcement (2, 3) with edges turned up around bead cores (1) and the cords at 60 to 90°, a tread reinforcement belt (5) at 0 to 30° and a band (8) over the belt wherein the cords of the carcass (2, 3) and the belt (5) comprise organic material cords having a modulus of tensile elasticity not greater than 5000 kg/mm 2. The band cords preferably have a higher modulus of tensile elasticity and may also be of organic fibres. The cord angles of the band (8) are in the range of 0 to 5°. The belt (5) may have folded edges. The tyre may include bead apices (7) between the carcass reinforcement (2, 3) and the folded up portions (2a, 3a). Preferred materials for the apex and fabric topping compounds are also provided as are rubber cushion pieces (6) adjacent to the belt (5).
Inventors
- 👤 Hiroyuki Noma
- 👤 Kazuo Oda
- 👤 Takao Otani
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 17:12
CPC Classifications
B; B60; B60C; B60C9/00; B60C9/02; B60C9/04; B60C9/08; B60C15/00; B60C15/0009; B60C15/0018; B60C15/0072; B60C15/06; B60C9/18; B60C9/20; B60C9/26; B60C2200/00; B60C2200/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
120 words
1 A tyre for an airplane comprising a pair of bead cores (1) a carcass reinforcement (2, 3) having its edges turned up around the bead cores (1) and comprising a ply of fabric having cords laid at an angle of 60° to 90° with respect to the equatorial plane of the tyre, a tread reinforcement belt (5) outside said carcass reinforcement comprising fabric having cords at an angle of 0 0 to 30 0 to the equatorial plane of the tyre and a band (8) over said belt (5) characterised in that the cords of the carcass (2, 3) and the belt (5) comprise organic material cords having a modulus of tensile elasticity not greater than 5000kg/mm 2 .
Claim 2
Dependent Claim
120 words
1 A tyre for an airplane comprising a pair of bead cores (1) a carcass reinforcement (2, 3) having its edges turned up around the bead cores (1) and comprising a ply of fabric having cords laid at an angle of 60° to 90° with respect to the equatorial plane of the tyre, a tread reinforcement belt (5) outside said carcass reinforcement comprising fabric having cords at an angle of 0 0 to 30 0 to the equatorial plane of the tyre and a band (8) over said belt (5) characterised in that the cords of the carcass (2, 3) and the belt (5) comprise organic material cords having a modulus of tensile elasticity not greater than 5000kg/mm 2 .
Claim 3
Dependent Claim
32 words
2 A tyre according to claim 1 characterised in that the cords of the carcass (2, 3) and the cords of the belt (5) have substantially the same modulus of tensile elasticity.
Claim 4
Dependent Claim
39 words
3 A tyre according to claim 1 or 2 characterised in that the moduli of tensile elasticity of the carcass cords (2, 3) and the belt cords (5) are in the range of 200 - 1000 kg/mm 2 .
Claim 5
Dependent Claim
43 words
4 A tyre according to claim 1, 2 or 3 characterised in that the band (8) comprises cords of organic material said cords having a modulus of tensile elasticity greater than the cords of the belt (5) and less than 5000 kg/mm .
Claim 6
Dependent Claim
37 words
5 A tyre according to any one of claims 1 - 4 characterised in that the cords of the band (8) are at an angle of 0 0 - 5° to the direction of the tyre circumference.
Claim 7
Dependent Claim
25 words
6 A tyre according to any one of claims 1-5 chacterisedin that belt (5) comprises plies of fabric having folded edges at the belt edges.
Claim 8
Dependent Claim
39 words
7 A tyre according to any one of claims 1 - 6 characterised in that the band (8) comprises of a layer of reinforcement material having a width of 20 to 90% of the width of the belt (5).
Claim 9
Dependent Claim
33 words
8 A tyre according to claim 7 characterised in that band (8) has in addition a layer of reinforcement material having a width greater than 90% of the width of the belt (5).
Claim 10
Dependent Claim
130 words
9 A tyre according to any one of claims 1 - 8 characterised by a bead apex (7) positioned radially outwards of each bead core (1) and between the carcass reinforcement (2, 3) and the folded up portion (2a, 3a) of the carcass reinforcement the said apex (7) comprising material having a dynamic elastic modulus in the range of 200 to 1500 kgf/cm as measured on a 4 mm wide x 30 mm long x 2 mm thick sample using a viscoelasticity spectrometer of Iwamoto Seisakusho, K.K. at 77°C with an initial strain of 10%, an amplitude of 2% and a frequency of 50 Hz and the folded up portions of the carcass reinforcement have their edges at a height of 15 to 70% of the tyre section height (H).
Claim 11
Dependent Claim
70 words
10 A tyre according to any one of claims 1 - 9 characterised in that an additional reinforcement layer (4) of organic material cords having a modulus of tensile elasticity less than 5000 kg/mm 2 is provided extending from beneath one bead core (1) around the tyre carcass to the second bead core (1) so that the additional reinforcement layer (4) is outside the carcass reinforcement and the bead apices.
Claim 12
Dependent Claim
59 words
11 A tyre according to any one of claims 1 - 10 characterised by a rubber cushion piece (6) positioned on the carcass (2, 3) adjacent to and radially inward of each edge of the belt (5) the material of the rubber cushion piece (6) having a 300% modulus in the range of 70 to 150 kg/cm 2 .
Claim 13
Dependent Claim
49 words
12 A tyre according to any one of claims 1 - 11 characterised in that the reinforcement fabric for the carcass reinforcement fabric (2, 3) and the belt (5) is embedded in soft rubber having a 300% modulus in the range of 80 to 160 kg/ cm 2 .
References Cited (Backward Citations)
No citation records indexed.
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