Sealing element for a face seal assembly

• US 6,341,781 B1
• Filed: 10/03/2000
• Issued: 01/29/2002
• Est. Priority Date: 04/15/1998
• Status: Expired due to Fees

• Current Assignee: Eagleburgmann Germany GmbH & Company KG (Freudenberg & Company KG)
• Original Assignee: Burgmann (Feodor) Dichtungswerke GmbH & Co. KG (Freudenberg & Company KG)
• Inventors: Matz, Berthold, Ries, Wolfgang, Svejkovsky, Reinhard, Nosowicz, Josef
• Primary Examiner(s): Knight, Anthony
• Assistant Examiner(s): Peavey, Enoch E.
• Application Number:
  US09/678,327
• Time in Patent Office: 483 Days
• Field of Search: 277/389, 277/391, 277/392, 277/379, 277/636, 277/944
• US Class Current: 277/391
• CPC Class Codes: F16J 15/36 connected by a diaphragm or bellow to the other member
• CPC Class Codes: F16J 15/363 the diaphragm or bellow being made of metal
• CPC Class Codes: Y10S 277/944 Elastomer or plastic

Abstract

A sealing element for a face seal assembly including a bellows portion having mounting portions at its axial ends. One of the mounting portions is designed for non-rotational mounting on a component, e.g. a shaft, and the other for retaining an annular face member. The sealing element is formed, on at least the faces thereof exposed to a medium to be sealed, from a plastics material selected from a group of plastics materials comprising PEEK and ECTFE. The sealing element serves for applying a bias force to the annular face member. The sealing element enables the design of an uncomplicated, easily maintained, externally pressurised single action face seal assembly which is particularly suitable for sealing aggressive media.

Claims

1. A sealing element for a face seal assembly, including a bellows portion and a pair of non-corrugated mounting portions axially spaced from each other, said bellows portion extending between said mounting portions, one of said mounting portions serving for mounting an annular face member thereon and the other for mounting to a rotary member, said bellows portion having spring-like properties for applying a resilient bias force to said one of said mounting portions, in which said bellows and mounting portions are an integrally formed part made throughout of a plastic material selected from a group of plastic materials comprising PEEK and ECTFE.

2. The sealing element as claimed in claim 1, wherein the annular face member is a separate part mounted on said one of said mounting portions by a frictional fit.

3. The sealing element as claimed in claim 1, wherein the annular face member is a separate part mounted on said one of said mounting portions by a form fit.

4. The sealing element as claimed in claim 1, wherein the annular face member is integral with said one of said mounting portions.

5. The sealing element as claimed in claim 4, wherein a sealing face of the annular face member is coated with a material having tribologic properties.