US3848651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tire tread having drainage chambers
Assignee: Dunlop Ltd
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Filing: 1972-09-12
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Granted: 1974-11-19
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Expires: 1992-09-12
Abstract
Abstract A tire having a plurality of wide drainage chambers in an axially outer tread rib which are each connected to the axially outer side of the rib by a narrow slot with a wide channel at the slot base. The drainage chambers and channels do not close up in the contact patch between tread and ground whereas the narrow slots do, of which the following is a Specification.
Inventors
- 👤 T French
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:57
CPC Classifications
B; B60; B60C; B60C11/00; B60C11/03; B60C11/032; B60C11/0306; B60C11/0309; B60C11/0323; B60C11/04; B60C11/042; B60C11/12; B29; B29D; B29D30/00; B29D30/06; B29D30/0601; B29D30/0606; B29D2030/0607; B29D2030/061; B60C2011/0337; B60C2011/0339; B60C2011/0341; B60C2011/0346; B60C11/1204; B60C2011/1213; B60C11/1236; B60C2011/1254; Y; Y10; Y10S; Y10S152/00; Y10S152/03; Y10S152/90
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
72 words
A tire comprising a tread portion having an axially outer circumferential tread rib, a plurality of circumferentially spaced apart wide drainage chambers provided in said circumferential rib, narrow axial slots extendng from at least some of the chambers to the axially outer side of the tire, and wide axial drainage channels connected to the chambers and spaced radially inwards from the ground-contacting surface of the rib at the base of the slots.
Claim 2
Dependent Claim
72 words
A tire comprising a tread portion having an axially outer circumferential tread rib, a plurality of circumferentially spaced apart wide drainage chambers provided in said circumferential rib, narrow axial slots extendng from at least some of the chambers to the axially outer side of the tire, and wide axial drainage channels connected to the chambers and spaced radially inwards from the ground-contacting surface of the rib at the base of the slots.
Claim 3
Dependent Claim
25 words
A tire according to claim 1 wherein the chambers each have an axial width less than that of the rib in which they are located.
Claim 4
Dependent Claim
26 words
A tire according to claim 1 wherein the chambers each have an axial width less than half that of the rib in which they are located.
Claim 5
Dependent Claim
23 words
A tire acording to claim 1 wherein the chambers are spaced apart from either side of the rib in which they are located.
Claim 6
Dependent Claim
18 words
A tire according to claim 1 wherein the depth of the chambers is greater than their axial width.
Claim 7
Dependent Claim
33 words
A tire according to claim 1 comprising at least one wqde circumferential groove in the tire tread, the depth of the chambers being substantially equal to the depth of the wide circumferential groove.
Claim 8
Dependent Claim
14 words
A tire according to claim 1 wherein the chambers comprise wide axially extending grooves.
Claim 9
Dependent Claim
15 words
A tire according to claim 1 wherein the chambers comprise wide axially extending zig-zag grooves.
Claim 10
Dependent Claim
68 words
A tire according to claim 1 wherein the axially outer side of each axially outer rib is bounded by a shoulder groove of such a shape that the rib and adjacent shoulder regions are formed with interengaging elements, a portion of one element engaging a recess in a further element, the elements becoming interlocked on application of and to resist a transverse load applied to the tire tread.
Claim 11
Dependent Claim
10 words
A tire according to claim 1 provided with a breaker.
Claim 12
Dependent Claim
12 words
A tire according to claim 1 provided with a radial ply carcass.
Claim 13
Dependent Claim
11 words
A tire according to claim 1 provided with a cross-ply carcass.
Claim 14
Dependent Claim
14 words
A tire according to claim 1 moulded using a moulding matrix of corresponding shape.
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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |