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Fuel Cells

Positive-contact-seal

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Positive-contact seal

Details

Inventors: Forch, Hans;
Assignee: Firma Carl Freudenberg (Weinheim an der Bergstrasse, DT)
Primary Examiner: Smith; Robert I.
Assistant Examiner:
Attorney, Agent or Firm: Burgess, Dinklage & Sprung

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.

DETAILED DESCRIPTION What is claimed is: 1.
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.
2.
A sealing assembly according to claim 1 wherein said flexible sealing ring is provided with a sealing lip.
3.
A sealing assembly according to claim 1 wherein the sealing ring abuts axially with its lip.
4.
A sealing assembly according to claim 1 wherein the sealing ring abuts radially with its lip.
5.
A sealing assembly according to claim 1 wherein the sealing lip consists of at least two layers.
6.
A sealing assembly according to claim 1 wherein said free fiber ends are flocked on said sealing ring.
7.
A sealing assembly according to claim 1 wherein said sealing lip is cut inclined in the range of the contact surface with the shaft so that the sealing layer touches the contact surface.
8.
A sealing assembly according to claim 1 wherein the layer facing the interior of said housing is provided with a condensed structure which layer is pulled around the front surface of the sealing lip.
9.
A sealing assembly according to claim 1 wherein said flexible sealing ring comprises a non-woven material.
10.
A sealing assembly according to claim 1 wherein said flexible sealing ring comprises a sealing lip of a web having free mobile fiber ends.
11.
A sealing assembly according to claim 1 wherein said free fiber ends possess a high, constant restoring force

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