Bellows seal having balanced, de-coupled seal ring and seal ring

Details Bellows seal having balanced, de-coupled seal ring and seal ring Bellows seal having balanced, de-coupled seal ring and seal ring

1997-02-28

1999-05-11

Knight, Anthony

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277361, 277389, F16J15/34

Patent

active

059019654

ABSTRACT:
A balanced, de-coupled seal assembly for use in a bellows seal having a mating rotating seal assembly, wherein the seal is used for sealing a process fluid along a rotatable shaft extending from a machine body. The seal assembly includes a seal ring, a seal ring shell mating with and de-coupled from the seal ring, and a flexible O-ring between the seal ring and the seal ring shell. The O-ring is provided at a location so to balance the seal ring and seal ring shell under both normal and reverse pressure conditions and to prevent the process fluid from leaking between the seal ring and the seal ring shell.

REFERENCES:
patent: 3559771 (1971-02-01), Crane
patent: 4889350 (1989-12-01), Tranter
patent: 5498007 (1996-03-01), Kulkarni et al.
patent: 5529315 (1996-06-01), Borrino et al.
patent: 5544897 (1996-08-01), Di Pietro et al.
patent: 5718560 (1998-02-01), Lorenzen
Sales Brochure for "Type 2800 for Non-Contacting, Dry Running Double Cartridge Seal", John Crane Inc. 6 pages, nominal publication date 1993.
Sales Brochure for "Type 1215 and 2215 Metal Bellows Cartridge Seals," John Crane Inc., 1991.
EG&G Sealol, Inc.--Redacted page from Distributor's Release Illustrating Type 631 Welded Metal Bellows Cartridge Seal.
EG&G Sealol, Inc. Industrial Division--Drawing No. 0704519 R/S (Rev.A)--Nominal date Jun. 28, 1991, Date of publication or First Use sometime in 1991-92.
Sales Brochure for "5615 and 5625 Universal Cartridge Metal Bellows Seal" John Crane Inc. Sep. 1996 (Nominal Publication Date).

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