US4057089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic tire for motor vehicles
Assignee: Continental AG
•
Filing: 1975-11-20
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Granted: 1977-11-08
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Expires: 1995-11-20
Abstract
Abstract A pneumatic tire for motor vehicles having a circumferential tread surface with molded-in grooves extending in a direction transverse to the circumferential direction of the tire, in which the grooves extend from a central circumferential tread surface section of the tire toward both lateral tire sides while following the curvature of a parabola of a second order.
Inventors
- 👤 Peter Johannsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:13
CPC Classifications
B; B60; B60C; B60C11/00; B60C11/03; B60C11/0306; B60C11/0302; B60C2011/0337; B60C2011/0339; B60C2011/0374; B60C2011/0386; B60C2011/0388
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
124 words
A pneumatic tire for high speed motor vehicles upon hard road surfacing, which has a circumferential tread surface with a circumferential central section, said tread surface to protect against danger of hydroplaning being provided with grooves therein extending from said central section toward both sides of said tread surface and said grooves being curved along structural curvature of a parabola of the second order and being provided instantaneously to eliminate water effectively from said tread surface, the structural curvature of said grooves being determined mathematically by a functional equation x = y 2 x constant, in which x is the coordinate extending in the axial direction of said tire, and in which y is the coordinate extending in the circumferential direction of said tire.
Claim 2
Dependent Claim
124 words
A pneumatic tire for high speed motor vehicles upon hard road surfacing, which has a circumferential tread surface with a circumferential central section, said tread surface to protect against danger of hydroplaning being provided with grooves therein extending from said central section toward both sides of said tread surface and said grooves being curved along structural curvature of a parabola of the second order and being provided instantaneously to eliminate water effectively from said tread surface, the structural curvature of said grooves being determined mathematically by a functional equation x = y 2 x constant, in which x is the coordinate extending in the axial direction of said tire, and in which y is the coordinate extending in the circumferential direction of said tire.
Claim 3
Dependent Claim
29 words
A pneumatic tire according to claim 1, in which the width of the tire grooves continuously increases with the decrease in the distance from the sides of the tire.
Claim 4
Dependent Claim
23 words
A pneumatic tire according to claim 2, in which the tread surface of said tire includes additional grooves intersecting said parabola curved grooves.
Claim 5
Dependent Claim
24 words
A pneumatic tire according to claim 3, in which said additional grooves extend peripherally at least approximately in the circumferential direction of said tire.
References Cited (Backward Citations)
US1127517A
Cited
US2770279A
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US3237669A
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US3457981A
Cited
US3674077A
Cited
US3799231A
Cited
US3848651A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-07 | 1981-05-09 | 1981-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-07 | 1985-05-09 | 1985-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-07 | 1989-05-09 | 1989-11-08 | $7700.00 | Window Closed / Lapsed |