Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1997-07-16
1999-09-21
DePumpo, Daniel G.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277387, 277389, 277391, F16J 1500
Patent
active
059543418
ABSTRACT:
A seal for sealing a low pressure area from a high pressure area for containing a process fluid. The high pressure area is located along a rotatable shaft extending from a machine body. The seal includes an outboard seal positioned along the shaft and an inboard seal axially spaced along the shaft from the outboard seal to define an annular chamber between the inboard seal and the outboard seal for containing a buffer fluid. The inboard seal includes a stationary assembly attached to the machine body and having a stationary seal ring with a stationary sealing face. The inboard seal also includes a rotating assembly attached to the shaft. The rotating assembly includes a rotating seal ring having a rotating sealing face in sealing relation with the stationary sealing face. A drive collar is positioned between the stationary assembly and the machine body to maintain the sealing relation of the rotating and stationary sealing faces when the pressure of the buffer fluid is less than the pressure of the process fluid.
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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 Jan. 15, 1996.
EG&G Sealol, Inc. Industrial Division--Drawing No. 0704519 R/S (Rev.A)--Nominal date Jun. 28, 1991, Date of publication of First Use sometime in 1991-1992.
Sales Brochure for "5615 and 5625 Universal Cartridge Metal Bellows Seal" John Crane Inc. Sep. 1996 (Nominal Publication Date).
Rathburn Fred
Ringer Yoram
DePumpo Daniel G.
John Crane Sealol Inc.
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