US3749145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic tires
Assignee: Dunlop Ltd
•
Filing: 1971-06-10
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Granted: 1973-07-31
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Expires: 1991-06-10
Abstract
Abstract A pneumatic tire having a breaker, particularly of steel cord fabric and circumferential tread ribs provided with transverse slots extending across the whole or a major portion of the rib width to separate areas of tread rubber which will interlock to resist a sideways force applied to the tire, of which the following is a specification.
Inventors
- 👤 C Hart
- 👤 E Haycock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:06
CPC Classifications
B; B60; B60C; B60C11/00; B60C11/03; B60C11/04; B60C11/0306; B60C11/032; B60C11/12; B60C11/1204; B60C2011/1213; B60C2011/1227; B60C11/1236; B60C2011/1254; Y; Y10; Y10S; Y10S152/00; Y10S152/03
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
89 words
A pneumatic tire comprising a tread, a breaker radially inwards of the tread, the tread having at least one rib extending in a circumferential direction, a plurality of narrow generally transversely-extending slots in the rib, each slot extending from one edge of the rib across at least a major portion of the rib width so as to at least effectively separate areas of tread rubber in the rib which will interlock with adjacent areas of tread rubber to resist a transverse force applied to the tread in either direction.
Claim 2
Dependent Claim
89 words
A pneumatic tire comprising a tread, a breaker radially inwards of the tread, the tread having at least one rib extending in a circumferential direction, a plurality of narrow generally transversely-extending slots in the rib, each slot extending from one edge of the rib across at least a major portion of the rib width so as to at least effectively separate areas of tread rubber in the rib which will interlock with adjacent areas of tread rubber to resist a transverse force applied to the tread in either direction.
Claim 3
Dependent Claim
40 words
A pneumatic tire according to claim 1 wherein each slot extends across the whole rib width to separate areas of tread rubber in the rib which will interlock one with another to resist a transverse force applied to the tread.
Claim 4
Dependent Claim
14 words
A pneumatic tire according to claim 1 wherein the breaker comprises steel cord fabric.
Claim 5
Dependent Claim
11 words
A pneumatic tire according to claim 1 including a tread reinforcement.
Claim 6
Dependent Claim
15 words
A pnematic tire according to claim 4 wherein the tread reinforcement comprises steel cord fabric.
Claim 7
Dependent Claim
12 words
A pneumatic tire according to claim 1 including a radial ply carcass.
Claim 8
Dependent Claim
14 words
A pneumatic tire according to claim 1 wherein the slots are of variable depth.
Claim 9
Dependent Claim
26 words
A pneumatic tire according to claim 1 wherein the depth of the slots is shallower at the edge of the rib than elsewhere in the slot.
Claim 10
Dependent Claim
20 words
A pneumatic tire according to claim 1 wherein the average depth of the slots is less thaN the rib height.
Claim 11
Dependent Claim
14 words
A pneumatic tire according to claim 1 wherein the slots are of sinusoidal configuration.
Claim 12
Dependent Claim
14 words
A pneumatic tire according to claim 1 wherein the slots are of zig-zag configuration.
Claim 13
Dependent Claim
23 words
A pneumatic tire according to claim 1 wherein the slots are arranged in closely adjacent pairs defining a narrow portion of rubber therebetween.
Claim 14
Dependent Claim
26 words
The tire of claim 1 in which the circumferentially extending rib follows a zig-zag path and the slots intersect the rib between apices of the rib.
Claim 15
Dependent Claim
23 words
The tire of claim 1 in which the generally transversly-extending slots have a substantial portion of their length extending in a non-axial direction.
Claim 16
Dependent Claim
19 words
The tire of claim 14 in which the slots do not extend for the whole width of the rib.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |