US4929684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stiff sidewalls for pneumatic tires
Assignee: Bridgestone Americas Tire Operations LLC
•
Filing: 1988-06-17
•
Granted: 1990-05-29
•
Expires: 2008-06-17
Abstract
Abstract Sidewalls (12,13) for pneumatic tires (10) having a greater stiffness improve handling and performance of the tire. The sidewalls comprise a rubber, selected from the group consisting of natural rubber, synthetic rubber and blends thereof, and from about 20 to 80 parts of a rubber compatible additive, per 100 parts of rubber capable of imparting a tensile modulus of from about 30 to 200 MPa at 10 percent elongation. Pneumatic tires provided with such sidewalls are improved and exhibit higher cornering force coefficients. A method for improving the handling characteristics of pneumatic tires includes the step of applying sidewalls to the tire carcass during building, having a tensile modulus of from about 30 to 200 MPa at 10 percent elongation.
Inventors
- 👤 Charles M. Roland
- 👤 Georg G. A. Bohm
- 👤 Steven E. Schonfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:34
CPC Classifications
B; B60; B60C; B60C13/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
60 words
A sidewall for the construction of pneumatic tires comprising a rubber selected from the group consisting of natural rubber, addition polymerized synthetic rubber and blends thereof and from about 20 to 80 parts of zinc dimethacrylate, per 100 parts of rubber, capable of providing a tensile modulus of elasticity of from about 30 to 200 MPa at 10 percent elongation.
Claim 2
Dependent Claim
60 words
A sidewall for the construction of pneumatic tires comprising a rubber selected from the group consisting of natural rubber, addition polymerized synthetic rubber and blends thereof and from about 20 to 80 parts of zinc dimethacrylate, per 100 parts of rubber, capable of providing a tensile modulus of elasticity of from about 30 to 200 MPa at 10 percent elongation.
Claim 3
Dependent Claim
14 words
A sidewall, as set forth in claim 1, wherein said rubber is natural rubber.
Claim 4
Dependent Claim
26 words
A sidewall, as set forth in claim 1, comprising 60 parts of zinc dimethacrylate per 100 parts of rubber and wherein said rubber is natural rubber.
Claim 5
Dependent Claim
72 words
In a pneumatic tire having annular beads, a tread, tread reinforcing member, carcass and sidewalls, the improvement comprising: employing sidewalls comprising a rubber selected from the group consisting of natural rubber, addition polymerized synthetic rubber and blends thereof and from about 20 to 80 parts of zinc dimethacrylate, per 100 parts of rubber, capable of providing a tensile modulus of elasticity of from about 30 to 200 MPa at 10 percent elongation.
Claim 6
Dependent Claim
72 words
In a pneumatic tire having annular beads, a tread, tread reinforcing member, carcass and sidewalls, the improvement comprising: employing sidewalls comprising a rubber selected from the group consisting of natural rubber, addition polymerized synthetic rubber and blends thereof and from about 20 to 80 parts of zinc dimethacrylate, per 100 parts of rubber, capable of providing a tensile modulus of elasticity of from about 30 to 200 MPa at 10 percent elongation.
Claim 7
Dependent Claim
15 words
A pneumatic tire, as set forth in claim 4, wherein said rubber is natural rubber.
Claim 8
Dependent Claim
27 words
A pneumatic tire, as set forth in claim 4, comprising 60 parts of zinc dimethacrylate per 100 parts of rubber and wherein said rubber is natural rubber.
References Cited (Backward Citations)
US3823122A
Cited
US4056269A
Cited
US4266772A
Cited
US3873348A
Cited
US4082288A
Cited
US4065537A
Cited
US4192790A
Cited
US4191671A
Cited
US4213409A
Cited
US4500466A
Cited
US4529770A
Cited
US4495326A
Cited
US4659754A
Cited
US4720526A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-28 | 1993-11-27 | 1994-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-28 | 1997-11-27 | 1998-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-28 | 2001-11-27 | 2002-05-29 | $7700.00 | Window Closed / Lapsed |