US5263526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic tire having specified bead structure
Assignee: Goodyear Tire and Rubber Co
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Filing: 1992-09-30
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Granted: 1993-11-23
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Expires: 2012-09-30
Abstract
Abstract A radial ply pneumatic tire features a bead core which comprises an arrangement of filaments positioned relative to one another. The bead core has a cross-section and a radially inward base side, a radially outermost point or side or sides, an axially inward first side, and an axially outward second side. The first side intersects the base side at a first edge and forms thereby an included angle α. The second side intersects the base side at a second edge and forms thereby an included angle β. Angle α is greater than or equal to β. The bead core has a perimeter comprising the lengths of the base, radially outermost, first, and second sides. The perimeter define a bead core area which is less than the area of an isosceles triangle having acute angles equal to α. The width of the bead heel surface is approximately equal to the distance between a hump and an axially inward surface of the wheel flange.
Inventors
- 👤 Thomas R. Oare
- 👤 Randall R. Brayer
- 👤 Jeffrey W. Kahrs
- 👤 Beale A. Robinson
- 👤 Keith C. Trares
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:06
CPC Classifications
B; B60; B60C; B60C15/00; B60C9/00; B60C9/02; B60C9/14; B60C15/02; B60C15/024; B60C15/04; B60C17/00; Y; Y10; Y10S; Y10S152/00; Y10S152/09; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10819
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
224 words
A vulcanized radial ply pneumatic tire having a pair of axially spaced beads, at least one radial ply extending between the beads and turned radially outwardly around the beads, the tire having a toroidal shape, each of the beads having a substantially inextensible bead core comprising a coil of annularly wound round metal wire filaments, which in the toroidally-shaped tire prior to its vulcanisation, has a polygonal cross-sectional area defined by imaginary line segments contacting the outer surfaces of the outer filaments of the coil, which surfaces at the respective outer filaments of the bead core, the bead core being further characterized by the polygonal cross-sectional area having: a radially inward base side, the base side having a first edge, a second edge and a length; a radially outward point or side; a first side extending from the base side toward the radially outward point or side, the first side intersecting the base side at the first edge to form an included acute angle α; and, a second side, the second side extending from the base side toward the radially outward point or side, the second side intersecting the base side at the second edge to form and included acute angle β, the angle α being on the axially side of the bead core, the angle α being greater than or equal to β.
Claim 2
Dependent Claim
224 words
A vulcanized radial ply pneumatic tire having a pair of axially spaced beads, at least one radial ply extending between the beads and turned radially outwardly around the beads, the tire having a toroidal shape, each of the beads having a substantially inextensible bead core comprising a coil of annularly wound round metal wire filaments, which in the toroidally-shaped tire prior to its vulcanisation, has a polygonal cross-sectional area defined by imaginary line segments contacting the outer surfaces of the outer filaments of the coil, which surfaces at the respective outer filaments of the bead core, the bead core being further characterized by the polygonal cross-sectional area having: a radially inward base side, the base side having a first edge, a second edge and a length; a radially outward point or side; a first side extending from the base side toward the radially outward point or side, the first side intersecting the base side at the first edge to form an included acute angle α; and, a second side, the second side extending from the base side toward the radially outward point or side, the second side intersecting the base side at the second edge to form and included acute angle β, the angle α being on the axially side of the bead core, the angle α being greater than or equal to β.
Claim 3
Dependent Claim
68 words
The pneumatic tire of claim 1 wherein the bead core polygonal cross-section has a perimeter, the perimeter being defined by line segments tangent to an outermost point of each of the filaments which make up the bead core, the perimeter defining the bead core cross-section, the bead core cross-sectional area being less than the area of an isosceles triangle having acute angles α and β that are equal.
Claim 4
Dependent Claim
25 words
The pneumatic tire of claim 1 wherein the bead core further comprises: first, second, third, fourth, and fifth layers of filaments in the bead core.
Claim 5
Dependent Claim
74 words
The pneumatic tire of claim 2 wherein the cross-sectional area of the bead core is less than the area of a trapezoid having angles α and β that are equal and which has a height equal to the distance from the bead core base side to an imaginary line parallel to the base side and tangent to the radially outer surface of the most radially outward filament in the cross-section of the bead core.
Claim 6
Dependent Claim
14 words
The pneumatic tire of claim 2 wherein the perimeter has at least five sides.
Claim 7
Dependent Claim
35 words
The pneumatic tire of claim 1 wherein the length of the base side of the bead core is greater than the lengths of the first or second sides or the radially outermost point or side.
Claim 8
Dependent Claim
22 words
The pneumatic tire of claim 1 wherein the length of the base side of the bead core is between 0.300" and 0.650".
Claim 9
Dependent Claim
22 words
The pneumatic tire of claim 1 wherein each of the filaments in the bead core has a diameter between 0.045" and 0.080".
Claim 10
Dependent Claim
34 words
The pneumatic tire of claim 1 wherein the bead core further comprises: a first layer of filaments, the first layer having a width, the width of the first layer being between 0.40" and 0.60".
Claim 11
Dependent Claim
36 words
The pneumatic tire of claim 9 wherein the bead core further comprises: a second layer, the second layer being located radially outwardly of the first layer, the second layer having a width between 0.35" and 0.05".
Claim 12
Dependent Claim
37 words
The pneumatic tire of claim 10 wherein the bead core further comprises: a third layer, the third layer being located radially outwardly of the second layer, the third layer having a third width between 0.30" and 0.45".
Claim 13
Dependent Claim
37 words
The pneumatic tire of claim 11 wherein the bead core further comprises: a fourth layer, the fourth layer being located radially outwardly of the third layer, the fourth layer having a fourth width between 0.20" and 0.35".
Claim 14
Dependent Claim
37 words
The pneumatic tire of claim 12 wherein the bead core further comprises: a fifth layer, the fifth layer being located radially outwardly of the fourth layer, the fifth layer having a fifth width between 0.10" and 0.25".
Claim 15
Dependent Claim
142 words
The pneumatic tire of claim 1 wherein the bead core further comprises: a first layer, the first layer having eight filaments; a second layer, the second layer being located radially outwardly of the first layer, the second layer having seven filaments nested radially outwardly of the filaments in the first layer; a third layer, the third layer being located radially outwardly of the second layer, the third layer having six filaments nested radially outwardly of the filaments in the second layer; a fourth layer, the fourth layer being located radially outwardly of the third layer, the fourth layer having four filaments nested radially outwardly of the filaments in the third layer; and, a fifth layer, the fifth layer being located radially outwardly of the fourth layer, the fifth layer having two filaments nested radially outwardly of the filaments in the fourth layer.
References Cited (Backward Citations)
CA780685A
Cited
US1437013A
Cited
US1485864A
Cited
US1665070A
Cited
US1670045A
Cited
US1914040A
Cited
US2149079A
Cited
US2869610A
Cited
US3542108A
Cited
GB1423401A
Cited
US3861442A
Cited
US3954131A
Cited
US3946785A
Cited
US4162698A
Cited
US4180116A
Cited
US4227563A
Cited
US4319622A
Cited
US4193437A
Cited
US4261405A
Cited
US4203481A
Cited
JPS57158105A
Cited
US4917164A
Cited
US4998575A
Cited
EP0371755A2
Cited
US5131445A
Cited
US5010938A
Cited
US5058649A
Cited
EP0475258A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-11-22 | 1997-05-24 | 1997-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-22 | 2001-05-24 | 2001-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-22 | 2005-05-24 | 2005-11-23 | $7700.00 | Window Closed / Lapsed |