Patent US4462447A successfully refreshed from Google Patents.
US4462447A
Expired / Lapsed
US
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Pneumatic tire
Assignee: Goodyear Tire and Rubber Co
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Filing: 1977-08-15
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Granted: 1984-07-31
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Expires: 1997-08-15
Abstract
Abstract The elliptically-shaped tire has a pair of oppositely-opposed bead cores, a carcass structure each end of which is wrapped around a bead core, an apex disposed between the carcass structure and each of the ends thereof, a pair of oppositely-opposed sidewalls overlying the carcass structure, a chafer strip positioned between the carcass structure and each of the sidewalls, and a tread overlying the carcass structure and a belt reinforcing structure positioned therebetween. The carcass structure has a carcass aspect ratio of about 60. Additionally, the tire has a pair of oppositely-opposed sidewall portions having a relatively thin radially outer portion and a relatively thick radially inner portion.
Inventors
- 👤 George J. Siefert
- 👤 Michael A. Kolowski
- 👤 John E. Lynch
- 👤 Terrence M. Ruip
- 👤 Henry L. Gresens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:08
CPC Classifications
B; B60; B60C; B60C13/00; B60C15/00; B60C15/02; B60C15/024; B60C3/00; B60C3/04; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10819; Y10T152/10828
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
420 words
A pneumatic tire for use on a wheel rim including, in combination, a pair of oppositely-opposed bead cores, a carcass structure each end of which is wrapped around a bead core, an apex disposed between the carcass structure and each of the ends thereof, a pair of oppositely-opposed sidewalls overlying said carcass structure, a chaffer strip positioned between said carcass structure and each of said sidewalls, a tread overlying said carcass structure and a belt reinforcing structure positioned therebetween; the improvement comprising: said carcass structure having a carcass aspect ratio of from about 50 to about 70, a pair of oppositely-opposed sidewall portions having a relatively thin radially outer portion and a relatively thick radially inner portion with the ratio of the minimum thinness of the radially outer portion to the maximum thickness of the radially inner portion being from about 1:3.5 to about 1:5, said sidewall portions each have an inner surface of an upper surface portion S and a lower surface portion O and an outer surface T, said upper surface portion S following the natural shape equation: ##EQU4## wherein; ##EQU5## S is equal to the axial distance from the centerplane to the natural shape line of the carcass structure; ρ o is equal to the radius from the axis of rotation at the centerline of the tire to the natural shape line of the carcass structure; ρ m is equal to the radius from the axis of rotation to the maximum axial distance on the natural shape line of the carcass structure to the centerplane of the tire; F(θ, K) and E(θ, K) are elliptical integrals of the first and second kind, respectively, said lower surface portion O following equation: O=K.sub.o +K.sub.1 X+K.sub.2 X.sup.2 +K.sub.3 X.sup.3 +K.sub.4 X.sup.4 +K.sub.5 X.sup.5 (II) wherein, O is the axial distance from the mid-circumferential plane of the tire; X is the distance from the rotational axis of the tire; ______________________________________
K.sub.o = 6.42 K.sub.3 = 1.69715
K.sub.1 = 23.81 K.sub.4 = .11605
K.sub.2 = 10.6733 K.sub.5 = .0029
______________________________________ and said outer surface T following equation: Th=K.sub.o '+K.sub.1 'X+K.sub.3 'X.sup.3 +K.sub.4 'X.sup.4 +K.sub.5 'X.sup.5 (III) wherein, Th is the gauge thickness from the contour of the inner surface measured parallel to the axis of rotation of the tire to the outer surface contour T; X is the distance from the rotational axis of the tire; and ______________________________________
K.sub.o ' =-3.981 K.sub.3 ' = -2.73194
K.sub.1 ' = -44.639
K.sub.4 ' = 0.17864
K.sub.2 ' = 18.2917
K.sub.5 ' = -.004329
______________________________________
Claim 2
Dependent Claim
420 words
A pneumatic tire for use on a wheel rim including, in combination, a pair of oppositely-opposed bead cores, a carcass structure each end of which is wrapped around a bead core, an apex disposed between the carcass structure and each of the ends thereof, a pair of oppositely-opposed sidewalls overlying said carcass structure, a chaffer strip positioned between said carcass structure and each of said sidewalls, a tread overlying said carcass structure and a belt reinforcing structure positioned therebetween; the improvement comprising: said carcass structure having a carcass aspect ratio of from about 50 to about 70, a pair of oppositely-opposed sidewall portions having a relatively thin radially outer portion and a relatively thick radially inner portion with the ratio of the minimum thinness of the radially outer portion to the maximum thickness of the radially inner portion being from about 1:3.5 to about 1:5, said sidewall portions each have an inner surface of an upper surface portion S and a lower surface portion O and an outer surface T, said upper surface portion S following the natural shape equation: ##EQU4## wherein; ##EQU5## S is equal to the axial distance from the centerplane to the natural shape line of the carcass structure; ρ o is equal to the radius from the axis of rotation at the centerline of the tire to the natural shape line of the carcass structure; ρ m is equal to the radius from the axis of rotation to the maximum axial distance on the natural shape line of the carcass structure to the centerplane of the tire; F(θ, K) and E(θ, K) are elliptical integrals of the first and second kind, respectively, said lower surface portion O following equation: O=K.sub.o +K.sub.1 X+K.sub.2 X.sup.2 +K.sub.3 X.sup.3 +K.sub.4 X.sup.4 +K.sub.5 X.sup.5 (II) wherein, O is the axial distance from the mid-circumferential plane of the tire; X is the distance from the rotational axis of the tire; ______________________________________
K.sub.o = 6.42 K.sub.3 = 1.69715
K.sub.1 = 23.81 K.sub.4 = .11605
K.sub.2 = 10.6733 K.sub.5 = .0029
______________________________________ and said outer surface T following equation: Th=K.sub.o '+K.sub.1 'X+K.sub.3 'X.sup.3 +K.sub.4 'X.sup.4 +K.sub.5 'X.sup.5 (III) wherein, Th is the gauge thickness from the contour of the inner surface measured parallel to the axis of rotation of the tire to the outer surface contour T; X is the distance from the rotational axis of the tire; and ______________________________________
K.sub.o ' =-3.981 K.sub.3 ' = -2.73194
K.sub.1 ' = -44.639
K.sub.4 ' = 0.17864
K.sub.2 ' = 18.2917
K.sub.5 ' = -.004329
______________________________________
Claim 3
Dependent Claim
38 words
A pneumatic tire according to claim 1 wherein said carcass aspect ratio is from 55 to 65, and said radially inner portion having a maximum thickness at a distance of approximately 20% of the maximum carcass section height.
Claim 4
Dependent Claim
13 words
A pneumatic tire according to claim 2 wherein said ratio is about 1:4.
Claim 5
Dependent Claim
126 words
A pneumatic tire according to claim 1 wherein said outer surface T follows the equation: Th=K.sub.o '+K.sub.1 'X+K.sub.2 'X.sup.2 +K.sub.3 'X.sup.3 +K.sub.4 'X.sup.4 +K.sub.5 'X.sup.5 (III) wherein; Th is the gauge thickness from the contour of the inner surface measured parallel to the axis of rotation of the tire to the outer surface contour T; X is the distance from the rotational axis of the tire; and ______________________________________
K.sub.o ' =-3.981 K.sub.3 ' = -2.73194
K.sub.1 ' = -44.639
K.sub.4 ' = 0.17864
K.sub.2 ' = 18.2917
K.sub.5 ' = -.004329
______________________________________ with a deviation of GT following equation: GT=K.sub.1 "X+K.sub.o " wherein; GT is the deviation in thickness; X is the distance from the rotational axis of the tire; K 1 "=-0.0526 K o "=0.6208
Claim 6
Dependent Claim
13 words
A tire according to claim 4 wherein said aspect ratio is about 60.
Claim 7
Dependent Claim
71 words
A pneumatic passenger tire and rim combination for use on a wheel mountable on a motor vehicle including, in combination, a pneumatic passenger tire according to claim 5 and a rim having a rim bead seat angle of from about 2° to about 10°, a rim flange angle of from about 25° to about 60° and a rim flange height of from about 7% of SH to about 11% of SH.
Claim 8
Dependent Claim
16 words
A pneumatic passenger tire according to claim 1 wherein said carcass aspect ratio is about 60.
Claim 9
Dependent Claim
71 words
A pneumatic passenger tire and rim combination for use on a wheel mountable on a motor vehicle including, in combination, a pneumatic passenger tire according to claim 7 and a rim having a rim bead seat angle of from about 2% to about 10°, a rim flange angle of from about 25° to about 60° and a rim flange height of from about 7% of SH to about 11% of SH.
Claim 10
Dependent Claim
37 words
A pneumatic passenger tire and rim combination according to claim 8 wherein said rim bead seat angle is about 5°, said rim flange angle is about 50°, and said rim flange height is about 9% of SH.
Claim 11
Dependent Claim
69 words
A pneumatic tire and rim combination for use on a wheel mountable on a motor vehicle including, in combination, a pneumatic tire according to claim 1 and a rim having a rim bead seat angle of from about 2° to about 10°, a rim flange angle of from about 25° to about 60° and a rim flange height of from about 7% of SH to about 11% of SH.
Claim 12
Dependent Claim
36 words
A pneumatic tire and rim combination according to claim 10 wherein said rim bead seat angle is about 5°, said rim flange angle is about 50°, and said rim flange height is about 9% of SH.
Claim 13
Dependent Claim
18 words
A pneumatic tire and rim combination according to claim 11 wherein said carcass aspect ratio is about 61.5.
Claim 14
Dependent Claim
18 words
A pneumatic tire and rim combination according to claim 1 wherein said carcass aspect ratio is about 61.5.
Claim 15
Dependent Claim
71 words
A pneumatic passenger tire and rim combination for use on a wheel mountable on a motor vehicle including in combination, a pneumatic passenger tire according to claim 1, said carcass structure having a plurality of parallel rubber coated fabric cords disposed at an angle from about 75° to 90° with respect to the mid-circumferential plane of said tire, a chaffer strip positioned between said carcass structure and each of said sidewalls.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-31 | 1988-01-30 | 1988-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-31 | 1992-01-30 | 1992-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-31 | 1996-01-30 | 1996-07-31 | $7700.00 | Window Closed / Lapsed |