US3760858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic tires
Assignee: Dunlop Holdings Ltd
•
Filing: 1971-09-27
•
Granted: 1973-09-25
•
Expires: 1991-09-27
Abstract
Abstract A pneumatic tire having a radial ply carcass and a sidewall reinforcing ply in at least one sidewall of the tire. The sidewall reinforcing ply may be a direct continuation of the carcass ply turn-up or a separate ply, overlapping the turn-up. The sidewall reinforcing ply may extend to the remote side of the tire breaker assembly either under or over the breaker assembly or between two layers thereof. The sidewall reinforcing ply may be of cranked form.
Inventors
- 👤 A Grossett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:00
CPC Classifications
B; B60; B60C; B60C9/00; B60C9/02; B60C9/04; B60C9/0207; B60C9/07; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10855; Y10T152/10864
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
283 words
A pneumatic tire comprising a tread portion, two sidewalls, two bead regions, a carcass ply extending from one bead region of the tire to the other which in the tread portion of the tire is disposed substantially at 90* to the mid-circumferential plane, a breaker assembly comprising at least one breaker layer and a sidewall reinforcing ply which is either a continuation of or separate from a turn up of the carcass ply around a bead region of the tire located in at least one of the two sidewalls of the tire axially outwardly of the carcass ply and extending from the bead region of the tire, the radially outermost edge of the sidewall reinforcing ply lying between a radial distance (h min) of 0.7 H from the radially outermost extremity of the flange of the wheel on which the tire is to be mounted, in the normally inflated but unloaded state of the tire, and the edge of the breaker assembly remote from the sidewall in which the sidewall reinforcing ply is located, H being the radial distance between the radially outermost extremity of the flange of the wheel on which the tire is to be mounted and the interior of the tire at its mid-circumferential plane, wherein the sidewall reinforcing ply is of cranked form, the portion of the ply which lies radially inwards of the widest part of the tire having radially extending cords while for the remainder of the ply and ply cords extend at an angle of between 50* and 90* to a circumference of the tire, the change of angle occurring on a circumference which lies at the widest part of the tire or radially outwards thereof.
Claim 2
Dependent Claim
283 words
A pneumatic tire comprising a tread portion, two sidewalls, two bead regions, a carcass ply extending from one bead region of the tire to the other which in the tread portion of the tire is disposed substantially at 90* to the mid-circumferential plane, a breaker assembly comprising at least one breaker layer and a sidewall reinforcing ply which is either a continuation of or separate from a turn up of the carcass ply around a bead region of the tire located in at least one of the two sidewalls of the tire axially outwardly of the carcass ply and extending from the bead region of the tire, the radially outermost edge of the sidewall reinforcing ply lying between a radial distance (h min) of 0.7 H from the radially outermost extremity of the flange of the wheel on which the tire is to be mounted, in the normally inflated but unloaded state of the tire, and the edge of the breaker assembly remote from the sidewall in which the sidewall reinforcing ply is located, H being the radial distance between the radially outermost extremity of the flange of the wheel on which the tire is to be mounted and the interior of the tire at its mid-circumferential plane, wherein the sidewall reinforcing ply is of cranked form, the portion of the ply which lies radially inwards of the widest part of the tire having radially extending cords while for the remainder of the ply and ply cords extend at an angle of between 50* and 90* to a circumference of the tire, the change of angle occurring on a circumference which lies at the widest part of the tire or radially outwards thereof.
Claim 3
Dependent Claim
37 words
A pneumatic tire according to claim 1 wherein the radial distance (h) of the radially outermost edge of the sidewall reinforcing ply from the radially outermost extremity of the rim flange does not exceed 1.05H (h max).
Claim 4
Dependent Claim
51 words
A pneumatic tire according to claim 1 wherein the sidewall reinforcing ply overlaps the breaker assembly and extends to a position laterally inwards from the edge of the widest breaker layer to end at a distance up to one third of the width of the widest breaker layer from said edge.
Claim 5
Dependent Claim
28 words
A pneumatic tire according to claim 1 wherein the sidewall reinforcing ply extendS laterally across the full width of the widest breaker layer to the remote edge thereof.
Claim 6
Dependent Claim
41 words
A pneumatic tire according to claim 1 wherein the thickness of rubber between the sidewall reinforcing ply and the carcass ply remains substantially constant from the mid-sidewall region of the tire to a region radially inwards of the breaker assembly edge.
Claim 7
Dependent Claim
33 words
A pneumatic tire according to claim 1 wherein the thickness of rubber between the sidewall reinforcing ply and the carcass ply decreases gradually from the mid-sidewall region radially outwards towards the breaker assembly.
Claim 8
Dependent Claim
52 words
A pneumatic tire according to claim 1 having a sidewall ply of cranked form wherein the change in cord angle takes place in the region between a distance of 0.7H radially outwards of the wheel flange on which the tire is to be mounted and the remote edge of the breaker assembly.
Claim 9
Dependent Claim
30 words
A pneumatic tire according to claim 1 having a sidewall ply separate from a carcass ply wherein the sidewall reinforcing ply is disposed axially inwards of the carcass ply turn-up.
Claim 10
Dependent Claim
30 words
A pneumatic tire according to claim 1 having a sidewall ply separate from a carcass ply wherein the sidewall reinforcing ply is disposed axially outwards of the carcass ply turn-up.
Claim 11
Dependent Claim
79 words
A pneumatic tire according to claim 1 having a sidewall reinforcing ply separate from a carcass ply wherein the carcass ply turn-up extends radially outwards so that its radially outermost extremity lies at a radial distance (h1) radially outwards of the radially innermost extremity of the bead core in the range 0.05H1 to 0.5H1, where H1 is the radial distance between the radially innermost extremity of the bead core and the interior of the tire at its mid-circumferential plane.
Claim 12
Dependent Claim
37 words
A pneumatic tire according to claim 1 having a sidewall reinforcing ply separate from a carcass ply wherein the cords of the sidewall reinforcing ply have properties different from those of the cords of the carcass ply.
Claim 13
Dependent Claim
40 words
A pneumatic tire according to claim 1 having a sidewall reinforcing ply separate from a carcass ply wherein the cords of the sidewall reinforcing ply have properties which are the same as those of the cords of the carcass ply.
Claim 14
Dependent Claim
57 words
A pneumatic tire according to claim 1 having a sidewall reinforcing ply separate from a carcass ply wherein the cords of the sidewall reinforcing ply have an extension at break in the range 5 to 25 percent compared to the cords of the carcass ply which have a substantially lower value of the order of 2 percent.
Claim 15
Dependent Claim
23 words
A pneumatic tire according to claim 13 wherein the cords of the sidewall reinforcing ply have an extension at break of 7 percent.
Claim 16
Dependent Claim
42 words
A pneumatic tire according to claim 1 having a sidewall reinforcing ply which is a direct continuation of a carcass ply turn-up wherein an additional ply is provided in at least one of the tire sidewalls contiguous with the sidewall reinforcing ply.
Claim 17
Dependent Claim
32 words
A pneumatic tire according to claim 15 wherein the radially inner extremity of the additional ply lies between the radially innermost extremity of the bead core and a radial distance 0.05H1 therefrom.
Claim 18
Dependent Claim
32 words
A pneumatic tire according to claim 15 wherein the radially outer extremity lies at a radial distance between 0.05H1 and 0.5H1 radially outwards of the radially innermost extremity of the bead core.
Claim 19
Dependent Claim
38 words
A pneumatic tire according to claim 1 wherein the radially outer edge of the sidewall reinforcing ply over-laps the breaker assembly and is positioned radially outwardly of the breaker assembly or between two layers of the breaker assembly.
Claim 20
Dependent Claim
19 words
A pneumatic tire according to claim 1 wherein the carcass ply extends radially for the whole of its length.
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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |