Resilient tires and wheels – Tires – resilient – Pneumatic tire or inner tube
Patent
1994-11-22
1996-06-25
Johnstone, Adrienne C.
Resilient tires and wheels
Tires, resilient
Pneumatic tire or inner tube
152547, 245 15, B60C 1500, B60C 1504
Patent
active
055291066
ABSTRACT:
A pneumatic tire for small passenger vehicles having a pair of bead portions located at the internal periphery of a pair of sidewalls connected to a tread at both its edges, wherein the bead core of the bead portion is a mono strand bead core and the cross-section of the bead core is a close-packed structure unit made of 3 to 20 wire windings. The diameter D of the wire is 1.2 to 1.8 mm, and the ratio H/D of the distance H between the centers of adjacent wire windings to the diameter D of the wire is 1.01 to 1.20. The cross-sectional configuration of the bead core is such that N2=N1+1, where N1 is the wire number of the first row and N2 is the wire number of the second row counted from the bead base side. It is possible to improve steering characteristics (maneuverability) of such a pneumatic tire for small passenger vehicles by restraining the disorder of uniformity of the tire in the circumferential and longitudinal directions.
REFERENCES:
patent: 5099892 (1992-03-01), Siegenhaler
patent: 5099893 (1992-03-01), Giorgetti
Patent Abstracts of Japan, No. 166 (M-1065) Corresponding to Japanese Laid-Open Patent Application No. HEI: 2-256503, Oct. 17, 1990.
Patent Abstracts of Japan, No. 120 (M-1079) corresponding to Japanese Laid-Open Patent Application No. HEI: 2-286407, Nov. 26, 1990.
Mechanics of Pneumatic Tires, ed. Samuel Clark: U.S. Dept. of Transportation, Aug. 1981, pp. 209-211.
Bridgestone Corporation
Johnstone Adrienne C.
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