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Patent Searching and Data


Title:
TWO-LAYER MULTI-STRAND CORDS HAVING VERY LOW, LOW AND MEDIUM MODULI
Document Type and Number:
WIPO Patent Application WO/2019/122723
Kind Code:
A8
Abstract:
The subject of the invention is a two-layer multi-strand cord (60) comprising an internal layer (Cl) of the cord made up of J>1 internal strands (Tl) and an external layer (CE) of the cord made up of L>1 external strands (TE). The cord satisfies the relationship 95 < MC < 170, where - MC = (J x Ml + L x ME) / (J+L) - Ml = 200 x cos4(α) x [Q x (D1 / 2)2 x cos4(β) + N x (D2 / 2)2 x COS4(Y)] / [Q x (D1 / 2)2 + N x (D2 / 2)2] - ME = 200 x cos4(α') x [Q' x (D1 ' / 2)2 x cos4(β') + P' x (D2' / 2)2 x cos4(δ') + N' x (D3' / 2)2 x COS4(Y')] / [Q' x (D1 ' / 2)2 + P' x (D2 / 2)2 + N' x (D3' / 2)2], with D1, D1', D2, D2', D3' being in mm, α and α' being the helix angle of each internal and external strand (Tl), β and β' being the helix angle of each internal thread (F1, F1'), δ' being the helix angle of each intermediate thread (F2') and γ and γ' being the helix angle of each external thread (F2, F3').

Inventors:
CLEMENT EMMANUEL (FR)
BARBAT ROMAIN (FR)
CHEVALLEY MARIANNA (FR)
GIANETTI ALEXANDRE (FR)
LAURENT STÉPHANE (FR)
Application Number:
PCT/FR2018/053419
Publication Date:
October 22, 2020
Filing Date:
December 19, 2018
Export Citation:
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Assignee:
MICHELIN & CIE (FR)
International Classes:
D07B1/06
Attorney, Agent or Firm:
DESBORDES, Guillaume (FR)
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