Positive-contact seal

US3938813A · kind A · utility

Assignee

• Firma Carl Freudenberg · DE

Inventor

• Hans Forch · Birkenau, DE

Key dates

• Filing date: Aug 1, 1974
• Grant date: Feb 17, 1976
• Expiry date: Aug 1, 1994

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16J15/3288
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

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.