The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 15, 2011
Filed:
Jan. 20, 2006
Hidenobu Akahane, Kodaira, JP;
Hiroyuki Yokokura, Kodaira, JP;
Hidenobu Akahane, Kodaira, JP;
Hiroyuki Yokokura, Kodaira, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
A pneumatic radial tire for a passenger car having a pair of bead portions and a carcass having at least one carcass ply toroidally extending between a pair of bead cores embedded in the respective bead portions and containing organic fiber cords. The organic fiber cord is a polyketone fiber cord satisfying the following equation: σ≧−0.01E+1.2 and σ≧0.02, where σ is a thermal shrinkage stress at 177° C. (cN/dtex) and E is an elastic modulus at 25° C. under a load of 49N (cN/dtex). The cord has a ply-twisting coefficient Nof 0.35-0.70 and a cable-twisting coefficient Nof 0.50-0.95, where N=n×(0.125×D/ρ)×10=n×(0.125×D/ρ)×10is a ply twisting number (turns/10 cm), nis a cable twisting number (turns/10 cm), Dis dtext of ply-twisted yarn, Dis a total dtex, and ρ is a specific gravity of the cord (g/cm).