A nonpneumatic tire (NPT) having an inner ring for receiving a hub by which the nonpneumatic tire is affixed to a vehicle or other apparatus, an outer ring encircled by a tread band, and a plurality of revolved and mirrored spokes that extend between the inner ring and the outer ring to form an interconnected web of collapsible open cells. Each of the spokes includes multiple segments, with at least some of the segments having a concave bias when in an unloaded state. The design and arrangement of the spokes results in a nondirectional web, and loads experienced by the NPT are distributed throughout the web in a manner that increases the load carrying capacity of the NPT.
An inflatable elastomeric inner tube having improved air retention properties. Such an inner tube may find use, for example, in a pneumatic tire of a bicycle, motorcycle, automobile or other vehicle.
Exemplary embodiments described herein are directed to tire pitch sequence design methodologies that are usable to develop tire tread pitch sequences that will minimize objectionable tonal qualities and disperse the acoustic energy produced during tire rotation across a wider frequency band. The exemplary design methodologies employ iterative randomization of pitch subsequences, waveform generation and analysis of pitch subsequences and full pitch sequences, and associated sorting and ranking using an objective function with an applied penalty factor.
B60C 11/11 - Sculptures des bandes de roulement dans lesquelles la surface en relief des sculptures est composée uniquement d'éléments isolés, p. ex. d'éléments en forme de blocs
A NPT tread layer mold and molding process. The mold may include an inner mold portion that supports a built-up green NPT tread layer, and an outer mold portion that cooperates with the inner mold portion to cure the tread layer and to form a tread pattern in an outer surface thereof. The inner mold portion may comprise two halves, each having a plurality of wall segments that collectively cooperate to form a tread layer inner surface molding wall when the inner mold is closed. Sidewall molding portions may also be provided to form limited sidewalls of the NPT tread layer—with or without a tread pattern. An inflatable bladder may be located within the inner mold portion to apply pressure to the tread layer inner surface molding wall and, resultantly, to the NPT tread layer, during molding.
B29C 43/36 - Moules pour la fabrication d'objets de longueur définie, c.-à-d. d'objets séparés
B29C 43/02 - Moulage par pressage, c.-à-d. en appliquant une pression externe pour faire couler la matière à moulerAppareils à cet effet pour la fabrication d'objets de longueur définie, c.-à-d. d'objets séparés
B29C 43/12 - Pressage isostatique, c.-à-d. en utilisant des organes presseurs non rigides coopérant avec des organes rigides ou des matrices utilisant des sacs entourant la matière à mouler
B29C 43/10 - Pressage isostatique, c.-à-d. en utilisant des organes presseurs non rigides coopérant avec des organes rigides ou des matrices
B29L 30/00 - Pneumatiques, bandages pleins ou leurs parties constitutives
B29C 33/48 - Moules ou noyauxLeurs détails ou accessoires comportant des moyens ou conçus spécialement pour faciliter le démoulage d'objets, p. ex. des objets à contre-dépouille avec des moyens rétractables ou démontables
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