Patents for December
Rubber industry patents as compiled by the editors of Rubber World Magazine for December 2023
Phthalic anhydride modified polymer rubbers of ethylene-glycidyl-methacrylate- vinyl acetate and epoxy resins comprising the same
U.S. patent: 11,725,101
Issued: August 15, 2023
Inventors: Martin Hoch, Susanna Lieber, Piming Ma, Qianqian Wang and Pengwu Xu
Assigned: Arlanxeo
Key statement: The present disclosure relates to rubber polymers of ethylene- glycidylmethacrylate-vinyl acetate polymer as modifiers in epoxy resins. In particular ethylene-glycidylmethacrylate- vinyl acetate rubber polymers comprising phthalic anhydride modified glycidyl methacrylate monomer units.
Tire comprising a rubber composition
U.S. patent: 11,724,542
Issued: August 15, 2023
Inventor: Masahiko Moriyama
Assigned: Michelin
Key statement: A tire comprises a fluorescent rubber composition based on at least an elastomer matrix, a reinforcing filler comprising between 0 and 50 phr of carbon black and between 2.5 and 15 phr of a fluorescent pigment.
Laminate body, manufacturing method therefor, and airless tire
U.S. patent: 11,731,402
Issued: August 22, 2023
Inventors: Ai Takeda and Jun Okamoto
Assigned: Sumitomo Rubber
Key statement: A laminate body of a rubber layer and a resin layer made of a resin, wherein the rubber layer includes a surface-treated superficial layer (4) directly united with the resin layer without any intervening adhesive layer.
Elastomer seal spring
U.S. patent: 11,735,858
Issued: August 22, 2023
Inventor: David Demaratos
Assigned: J.S.T.
Key statement: The seal spring of the present invention has a dual functionality. The seal spring provides both a sealing property and spring function in use within an electrical connector system, which is accomplished by its elastomeric qualities. The seal spring is preferably comprised of silicone, EPDM rubber or materials and compositions that provide similar performance during use, or the like. The seal spring of the present invention is not limited or defined into a spring section or a seal section by its geometry. Shown is an implementation of the seal spring within a conductive female housing and connector assembly. The seal spring compresses and provides adequate spring force against a disk ferrule assembly, pressing the disk ferrule assembly, with a wire shield, against a conductive female outer housing, providing a grounding scheme for the connector assembly. The seal spring also seals against the female outer housing and a wire.
Tire comprising a tread
U.S. patent: 11,724,545
Issued: August 15, 2023
Inventors: Tomoya Sakurada and Tomotake Uchida
Assigned: Michelin
Key statement: A tire having a tread comprising at least two radially superposed portions which comprise a radially external portion being made of a first rubber composition (FC) and a radially internal portion being made of a second rubber composition (SC); the tread comprising a plurality of tread pattern elements (1) delimited by cutouts (3, 4); the tread pattern elements (1) respectively comprising at least one lateral face (13, 14, 15, 16) and a contact surface (2) intended to come into contact with the ground during rolling; the external portion of the tread pattern elements (1) being at least partially covered on at least one of the lateral face(s) (13, 14, 15, 16) with a layer of a third rubber composition (TC).
Elastomer laminate
U.S. patent: 11,731,401
Issued: August 22, 2023
Inventors: Jose-Carlos Araujo Da Silva and Frederic Lemerle
Assigned: Michelin
Key statement: An elastomeric laminate comprises at least two adjacent cohesive layers, the first layer consisting of a composition based on 10 to 100 phr of a copolymer of ethylene and of a 1,3-diene of formula CH2═CR—CH═CH2, the ethylene units in the copolymer representing more than 50 mol % of the monomer units of the copolymer, the symbol R representing a hydrocarbon chain having 3 to 20 carbon atoms, from 0 to 90 phr of a diene elastomer having a content by weight of diene unit of greater than 50% and a crosslinking system; the second layer consisting of a composition based on a diene elastomer having a content by weight of diene unit of greater than 50% and a crosslinking system. Also disclosed is a tire, in particular a tire provided with a sidewall, comprising this composition.
Tire rim assembly having inner and outer rim components
U.S. patent: 11,724,539
Issued: August 15, 2023
Inventor: David G. Abdallah, Jr.
Assigned: Bridgestone
Key statement: A rim assembly for a tire includes an outer rim having an outer annular surface and an inner surface. The rim assembly also has an inner rim with an outer surface, wherein the inner surface of the outer rim has a first plurality of axial grooves that define a first plurality of axial ridges. The outer surface of the inner rim has a second plurality of axial grooves that define a second plurality of axial ridges. The second plurality of axial grooves have a cross-sectional geometry corresponding to a cross-sectional geometry of the first plurality of axial ridges and the second plurality of axial ridges have a cross-sectional geometry corresponding to a cross-sectional geometry of the first plurality of axial grooves.