Back to results
US 3,938,813 AGranted
Positive-contact seal
AssigneeFirma Carl Freudenberg
InventorHans Forch
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeFirma Carl Freudenberg
InventorHans Forch
Estimating the term…
An improvement in a sealing assembly for a shaft which sealing assembly has a housing for a fluid medium, a flexible sealing ring disposed within said housing and adapted to be disposed about said shaft in contact therewith and means for urging said flexible sealing ring disposed within said housing and adapted to be disposed about said shaft in contact therewith and means for urging said flexible sealing ring into contact with said shaft. The improvement resides in that the flexible sealing ring comprises a layer which is impermeable to said fluid medium, said layer disposed in facing relationship to the interior of said housing, said sealing ring having on its exterior surface which is to be in contact with the shaft free fiber ends, a majority of which are oriented in an axial direction towards the interior of said housing and are disposed in the direction of rotation of the shaft.
In a sealing assembly for a shaft comprising a housing for a fluid medium, a flexible sealing ring disposed within said housing and adaptable to be disposed about a shaft in contact therewith, and means for urging said flexible sealing ring into contact with said shaft, the improvement wherein said flexible sealing ring comprises a layer which is impermeable to the fluid medium to be used, said layer in facing relationship to the interior of said housing, said flexible sealing ring having on its exterior surface which is in contact with the shaft free fiber ends, a majority of which are oriented in an axial direction towards the interior of said housing and are disposable in the direction of rotation of the shaft.
A sealing assembly comprising a housing, a flexible sealing ring disposed within said housing, means for urging said flexible sealing ring toward a shaft about which the said sealing assembly is connectable wherein said flexible sealing ring comprises a fiber-containing material, which is provided on the side opposite the interior of said casing with a material which is impermeable to a fluid medium, and robust in case of dry operation said side opposite that to which faces the fluid medium having free fiber ends in the region wherein said sealing ring would make contact with a shaft disposed therewithin, the proponderant majority of said free fiber ends being orientable in an axial direction towards the medium to be sealed, said free fiber ends being disposable in the direction of shaft rotation.
Dependencies are inferred from the claim text.