Patent US3556191A successfully refreshed from Google Patents.
US3556191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic tires
Assignee: Dunlop Co Ltd
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Filing: 1968-03-08
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Granted: 1971-01-19
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Expires: 1988-03-08
Abstract
Abstract A tread pattern for a low squat (wide oval) pneumatic tire to assist in the rapid removal of water from the contact area of the tire tread on the road surface comprising a series of zigzag grooves arranged such that the various parameters associated with water flow capacity (drainage) e.g. rib width, groove width etc. provide progressively decreased capacity from the midcircumferential plane to the shoulder of the tire.
Inventors
- 👤 Iain C Mills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:07
CPC Classifications
B; B60; B60C; B60C11/00; B60C11/03; B60C11/04; B60C11/0306; B60C2011/0337; B60C2011/0339; B60C2011/0381; B60C2011/0383; Y; Y10; Y10S; Y10S152/00; Y10S152/90
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
130 words
A pneumatic tire comprising a tread portion provided with a plurality of undulating generally circumferential grooves and ribs; the configuration of the undulations varying progressively in each direction laterally from the groove nearest the midcircumferential line of the tire to the grooves adjacent to the shoulders of the tire to reduce progressively from the center of the tread to the shoulders of the tire the freedom of water flow through the grooves whereby the ratio of the water flow drainage capacity of the generally circumferential grooves of the tire to the mean axial spacing of the grooves to one side of a groove between the said groove and an adjacent groove progressively decreases from the groove nearest the midcircumferential line to the grooves adjacent to the shoulders of the tire.
Claim 2
Dependent Claim
130 words
A pneumatic tire comprising a tread portion provided with a plurality of undulating generally circumferential grooves and ribs; the configuration of the undulations varying progressively in each direction laterally from the groove nearest the midcircumferential line of the tire to the grooves adjacent to the shoulders of the tire to reduce progressively from the center of the tread to the shoulders of the tire the freedom of water flow through the grooves whereby the ratio of the water flow drainage capacity of the generally circumferential grooves of the tire to the mean axial spacing of the grooves to one side of a groove between the said groove and an adjacent groove progressively decreases from the groove nearest the midcircumferential line to the grooves adjacent to the shoulders of the tire.
Claim 3
Dependent Claim
38 words
A pneumatic tire according to claim 1 wherein the axial distance between the grooves increases progressively from the distance between the grooves nearest the midcircumferential plane to the distance between the grooves nearest a shoulder of the tire.
Claim 4
Dependent Claim
43 words
A pneumatic tire according to claim 1 wherein the general angle of inclination of the corresponding undulating groove with respect to a circumferential line becomes progressively greater from the groove nearest the midcircumferential plane to the groove nearest a shoulder of a tire.
Claim 5
Dependent Claim
32 words
A pneumatic tire according to claim 1 wherein the amplitude of the undulating grooves progressively increases from the groove nearest the midcircumferential plane to the groove nearest the shoulder of the tire.
Claim 6
Dependent Claim
37 words
A pneumatic tire according to claim 1 wherein the circumferential offset of the peaks of the undulating grooves progressively increases from a groove adjacent the midcircumferential plane to the groove nearest to a shoulder of the tire.
Claim 7
Dependent Claim
39 words
A pneumatic tire according to claim 5 wherein the width of the grooves measured at the surface of the tire tread decreases progressively from the groove nearest the midcircumferential plane to the groove nearest a shoulder of a tire.
Claim 8
Dependent Claim
33 words
A pneumatic tire according to claim 1 wherein the transverse cross-sectional area of the grooves decreases progressively from the groove nearest the midcircumferential plane to the groove nearest a shoulder of the tire.
Claim 9
Dependent Claim
36 words
A pneumatic tire according to claim 1 wherein the grooves constructed with a transverse cross section the area of which is greater in the region near the base than in the region near the tread surface.
Claim 10
Dependent Claim
16 words
A pneumatic tire according to claim 1 wherein the groove is provided with a bulbous base.
Claim 11
Dependent Claim
24 words
A pneumatic tire according to claim 1 wherein the water flow capacity parameters of the tire tread are arranged to follow a logarithmic progression.
Claim 12
Dependent Claim
15 words
A pneumatic tire according to claim 1 wherein the logarithm is to the base 10.
Claim 13
Dependent Claim
37 words
A pneumatic tire according to claim 1 wherein each undulating generally cirCumferential groove has associated with it a series of side grooves extending axially of the groove and joining the groove at the peaks of the undulations.
Claim 14
Dependent Claim
62 words
A pneumatic tire according to claim 1 wherein each undulating generally circumferential groove has associated with it a series of side grooves joining the groove at the peaks of the groove the angle of inclination of the side grooves associated with successive grooves to an axial line increasing progressively from the midcircumferential plane of the tire to the shoulder of the tire.
Claim 15
Dependent Claim
58 words
A pneumatic tire comprising a tread portion provided with a plurality of generally circumferential undulating grooves and ribs, each groove having substantially the same configuration and depth in which the axial distance between the grooves progressively increases from the grooves nearest to the midcircumferential plane of the tire to the grooves closest to the shoulders of the tire.
Claim 16
Dependent Claim
58 words
A pneumatic tire comprising a tread portion provided with a plurality of generally circumferential undulating grooves and ribs, each groove having substantially the same configuration and depth in which the axial distance between the grooves progressively increases from the grooves nearest to the midcircumferential plane of the tire to the grooves closest to the shoulders of the tire.
Claim 17
Dependent Claim
21 words
A pneumatic tire according to claim 14 in which the increase in axial distance between the grooves follows a logarithmic progression.
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |