Resilient tires and wheels – Tires – resilient – Pneumatic tire or inner tube
Reexamination Certificate
1999-05-06
2001-12-25
Johnstone, Adrienne C. (Department: 1733)
Resilient tires and wheels
Tires, resilient
Pneumatic tire or inner tube
C152S548000, C152S562000
Reexamination Certificate
active
06332487
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to pneumatic tires and particularly to belted tires having a mono-ply carcass construction.
2. Description of Related Art
Conventional pneumatic tires comprise a tire carcass extending between two wheelrim contacting bead portions, through sidewall portions to a ground contacting tread portion. The tire carcass is conventionally reinforced by one or more plies of cord reinforced tire fabric extending continuously from bead to bead.
The ground contacting tread region is further reinforced between tread edges by a circumferentially extending annular hoop-like belt or breaker comprising a plurality of plies of cord reinforced rubber fabric disposed radially outwardly of the carcass ply and inwardly of the tread rubber.
To provide anchorage in each bead region the carcass ply is turned around an annularly extending inextensible bead hoop, and thereafter is extended radially outwardly towards the mid-sidewall.
Disposed between the carcass ply main portion and the thus formed carcass ply turn-up portion is a hard rubber apex.
BRIEF SUMMARY OF THE INVENTION
A pneumatic tire comprising a carcass ply extending in a main portion between bead regions through sidewall regions and a crown region radially inward of a ground contacting tread and a tread reinforcing breaker, the carcass ply in each bead region being turned closely around an annularly extending inextensible bead core from the axially inside to the outside and thereafter being extended radially outwardly to form a ply turn-up portion overlying the carcass main portion the ply turn-up portion extending outwardly to underlie the axial edge of the breaker, the carcass ply being reinforced by a plurality of mutually parallel carcass cords, wherein the carcass ply cords in the crown region are disposed at an angle in the range of 85°-90° to the tire circumferential direction and the cords in the sidewall regions are disposed at a smaller angle than the cords in the crown region being at an angle in the range of 85°-90° to the tire circumferential direction and the cords in the sidewall regions are disposed at a smaller angle than the cords in the crown region being at an angle in the range of 65°-85° to the tire circumferential direction and the cords in the carcass main portion and those of the carcass turn-up portion are crossed with respect to each other.
Preferably the carcass turn-up portion overlaps the breaker edge by a distance of 5-30% most preferably 10-20% of the axial width of the breaker.
The change of angle of the carcass cords from the crown to the sidewall region is in the edge region of the breaker.
REFERENCES:
patent: 3286758 (1966-11-01), Svereckis et al.
patent: 3760858 (1973-09-01), Grossett
patent: 4096899 (1978-06-01), Kitazawa et al.
patent: 1 052 117 A2 (2000-11-01), None
patent: 56-135304 (1981-10-01), None
patent: 2-144201 (1990-06-01), None
patent: 4-31106 (1992-02-01), None
Birch & Stewart Kolasch & Birch, LLP
Dunlop Tire Corporation
Johnstone Adrienne C.
LandOfFree
Tire with carcass cord angle in crown region different than... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Tire with carcass cord angle in crown region different than..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tire with carcass cord angle in crown region different than... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2563038