Pneumatic tire including a tread with circumferential grooves
Patent 5450885 Issued on September 19, 1995. Estimated Expiration Date: 
August 20, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 20, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3543827 Pneumatic radial tires All-season high-performance radial-ply passenger pneumatic tire Pneumatic tire tread with varying block lengths and varying main groove widths 5238038 InventorAssigneeApplicationNo. 109527 filed on 08/20/1993US Classes:152/209.26, Having circumferential groove width at least 10% per cent of tread width152/209.28Having directional two dimensional pattern (e.g., "v" shaped, etc.)ExaminersPrimary: Maki, Steven D.Attorney, Agent or FirmForeign Patent References
International ClassB60C 011/13Foreign Application Priority Data1992-08-25 JPAbstractA pneumatic tire which comprises a tread provided with circumferential grooves extending continuously circumferentially of the tire,in the cross section of the tire including the tire axis, the cross sectional shape of each of the circumferential grooves being composed of a pair of oppositely opposed radially outer portions extending radially inwardly from the tread surface,the outer portions being curved such that the axial width therebetween increases radially outwardly and the inclination angle of each outer portion to the groove center line (CL) increases radially outwardly, whereby running noise, especially air resonance noise and air pumping noise, is reduced. | |
