Title: Radial tire with crown reinforcement block of two superimposed pairs of plies

Abstract: A tire with a radial carcass reinforcement anchored in each bead and with a crown reinforcement formed of four crossed working plies forming an angle of between 10.degree. and 45.degree. with the longitudinal direction of the tire is improved due to the fact that the working plies form a block of two superimposed pairs of plies of crossed cables, the plies of the first pair forming opposite angles equal to .beta. and the plies of the second pair forming opposite angles equal to .alpha., .beta. being greater than .alpha., the difference .beta.-.alpha. being at least equal to the value of the expression h sin (.beta.+.alpha.)/2z

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Herbelleau, Yves (Riom, FR)

Application Number: 025393
Filing Date: 1979-03-30
Publication_date: 1980-08-05
Assignee: Compagnie Generale des Etablissements Michelin (Clermont-Ferrand, FR)
Primary Class(es): 152/535 152/532, 152/536
Other Classes:
US Patent Ref:

3814162	Jun, 1974	Hashida et al.	152/361.
3874436	Apr, 1975	Hashida et al.	152/361.

Other Refs: 1001585851898

Feb, 1952	FR
Oct, 1960	GB

Primary Examiner: Goolkasian, John T.
Assistant Examiner: Rodgers, Lois E.
Attorney: Brumbaugh, Graves, Donohue & Raymond