US 11,885,416 B2
Dynamic shaft seal
Jasmin Menzel, Weinheim (DE); Boris Traber, Hirschberg (DE); Matthias Adler, Heppenheim (DE); Eva Fleischmann, Alsbach-Haehnlein (DE); and Christine Portela Cubillo, Bickenbach (DE)
Assigned to CARL FREUDENBERG KG, Weinheim (DE)
Appl. No. 17/630,519
Filed by CARL FREUDENBERG KG, Weinheim (DE)
PCT Filed Jul. 23, 2020, PCT No. PCT/EP2020/070828
§ 371(c)(1), (2) Date Jan. 27, 2022,
PCT Pub. No. WO2021/018733, PCT Pub. Date Feb. 4, 2021.
Claims priority of application No. 10 2019 120 368.6 (DE), filed on Jul. 29, 2019.
Prior Publication US 2023/0076622 A1, Mar. 9, 2023
Int. Cl. F16J 15/3284 (2016.01); C08K 3/04 (2006.01)
CPC F16J 15/3284 (2013.01) [C08K 3/042 (2017.05)] 14 Claims
OG exemplary drawing
 
1. A dynamic shaft seal, comprising:
(a) an elastomeric material, and
(b) graphene without a chemically modified surface in an amount of 0.1 to 2 phr, based on 100 parts by weight of the elastomeric material, as the sole elemental carbon component of the dynamic shaft seal,
wherein the dynamic shaft seal is a lip seal having a seal lip which is in radial contact with a rotating part during operation, the lip seal having to different seal edge angles.