Apollo Tyres has been granted a patent for a pneumatic tire with a sound absorbing device component. The tire includes a panel with perforations and two sidewall sections, connected to the inner surface of the tire. The panel is positioned at a distance from the inner surface, defining an inner volume enclosed by the panel, sidewall sections, and inner surface. The panel contains at least 95% of all perforations, and the inner volume includes a polymeric foam that extends along the entire inner circumference of the tire. GlobalData’s report on Apollo Tyres gives a 360-degree view of the company including its patenting strategy. Buy the report here.

According to GlobalData’s company profile on Apollo Tyres, self-sealing tyres was a key innovation area identified from patents. Apollo Tyres's grant share as of June 2023 was 1%. Grant share is based on the ratio of number of grants to total number of patents.

The patent is granted for a pneumatic tyre with sound-absorbing properties

Source: United States Patent and Trademark Office (USPTO). Credit: Apollo Tyres Ltd

A recently granted patent (Publication Number: US11679631B2) describes a pneumatic tire with a sound-absorbing device component connected to its inner surface. The sound-absorbing device component consists of a panel with multiple perforations and two sidewall sections. The sidewall sections are connected to the inner surface of the tire and positioned opposite each other. The panel is supported by the sidewall sections, creating an inner volume enclosed by the panel, sidewall sections, and inner surface of the tire. The panel contains at least 95% of all perforations that allow access to the inner volume. The inner volume is filled with a polymeric foam, which extends along the entire inner circumference of the tire.

The sidewalls of the tire do not have any perforations to the inner volume of the sound-absorbing device component. The panel can be made of elastomer and/or metal and has a perforation ratio ranging from 0.05% to 30%. The perforations in the panel have a diameter ranging from 0.5 mm to 20 mm.

The patent also covers a wheel assembly that includes the pneumatic tire described above mounted onto a wheel. The wheel assembly has the same features as the tire, including the sound-absorbing device component connected to the inner surface of the wheel. The inner volume of the wheel assembly also contains an open-cell polymeric foam.

Additionally, the patent describes a method for reducing noise emissions from a wheel assembly. The method involves connecting a sound-absorbing device component to the inner surface of the tire and/or the inner surface of the wheel. The sound-absorbing device component consists of a panel with multiple perforations and two sidewall sections. The panel is supported by the sidewall sections, creating an inner volume enclosed by the panel, sidewall sections, and inner surface of the tire or wheel. The inner volume is filled with a polymeric foam, and the sound-absorbing device component and foam extend along the entire inner circumference of the tire or wheel.

In summary, this patent presents a pneumatic tire and wheel assembly with a sound-absorbing device component that reduces noise emissions. The component consists of a perforated panel supported by sidewall sections, enclosing an inner volume filled with a polymeric foam. The invention aims to provide a quieter driving experience by minimizing noise generated by the tire and wheel assembly.

To know more about GlobalData’s detailed insights on Apollo Tyres, buy the report here.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.