Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1994-01-28
1996-10-08
Cummings, Scott
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 65, 277170, 277174, 277190, 277DIG10, F16J 1534
Patent
active
055622941
ABSTRACT:
A fluid handling machine having a shaft, a radially disposed housing, and a backup seal. During normal operation, the backup seal is concentric with and radially spaced from the shaft. The backup seal includes a first annular portion located adjacent the backup seal chamber and a second annular portion preferably made of carbon graphite. The backup seal is configured to engage the housing such that when the fluid pressure in the backup seal chamber exceeds a predetermined level, a sufficient axial force is applied to the first annular portion and transmitted therethrough to the second annular portion to cause the second annular portion to close radially into sealing engagement with the shaft.
REFERENCES:
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patent: 5292138 (1994-03-01), Glynn et al.
H. Hugo Buchter; "Industrial Sealing Technology";pp. 285-95 Jul. 1986.
"Seals and Sealing Handbook";pp. 190-196 Jul. 1986.
BW/IP International, Inc.
Cummings Scott
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