Structure for reinforcing bead sections of radial tires for heavy loads
CA 1086620 A · Owner: Bridgestone Tire Company Limited · Inventors: Sogi, Toshiyuki; Yahagi, Mitsuhisa; Motomura, Kenichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Reinforcing structure at bead sections of radial tires for heavy load comprising, (1) at least one carcass ply (2) at least one chafer, (3) a circular triangular composite rubber stiffener composed of a lower half portion having a higher modulus and an upper half portion having a lower modulus, which is disposed between a case main portion and the turned-over carcass ply portion and, (4) a reinforcing member composed of at least two rubberized organic fiber cord layers arranged at the case main portion, the inward end in the radial direction of said reinforcing member being locked with the bead base and said reinforcing member being disposed along a circular region having a given height at …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted September 30, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 30, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.