Freudenberg has patented a dynamic shaft seal made of elastomer material and graphene without a chemically modified surface. The seal, consisting solely of elemental carbon, is designed for radial contact with rotating parts and features specific seal edge angles. GlobalData’s report on Freudenberg gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Freudenberg, Electromagnetic valve actuators was a key innovation area identified from patents. Freudenberg's grant share as of January 2024 was 48%. Grant share is based on the ratio of number of grants to total number of patents.
Dynamic shaft seal with graphene as sole elemental carbon component
A recently granted patent (Publication Number: US11885416B2) discloses a dynamic shaft seal utilizing graphene as the sole elemental carbon component in an elastomeric material. The seal, designed as a lip seal with specific seal lip characteristics, aims to reduce abrasion and improve performance in tribological systems. The graphene used in the seal has a layer thickness of less than 3.35 nm and is present in an amount ranging from 0.1 to 2 phr based on the elastomeric material's weight. Additionally, the composition of the seal must exhibit a compression set of =16% according to DIN ISO 815, A standards.
Furthermore, the patent also covers a tribological system incorporating the dynamic shaft seal, where the seal is in radial contact with a shaft and can be used in conjunction with lubricants. The system includes a shaft with a metal surface, and the dynamic shaft seal, which contains graphene without a chemically modified surface, aims to reduce abrasion and improve overall performance. The method outlined in the patent for reducing abrasion involves the proper arrangement of the dynamic shaft seal adjacent to a shaft and subsequent rotational movement. By utilizing graphene in the elastomeric material of the seal, the patent aims to enhance the efficiency and longevity of tribological systems while minimizing wear and tear on components.
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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.
