Pressurized chamber seal cartridge

Details Pressurized chamber seal cartridge Pressurized chamber seal cartridge

2006-10-03

2006-10-03

Lagman, Frederick L. (Department: 3673)

Seal for a joint or juncture

Seal between relatively movable parts

Circumferential contact seal for other than piston

C277S510000, C277S628000

Reexamination Certificate

active

07114726

ABSTRACT:
A seal cartridge for a centrifugal pump includes a housing that fits within a conventional stuffing box of the pump and has a cylindrical internal surface receiving the shaft. A pair of annular grooves are provided internally of the housing adjacent respectively opposite ends thereof. Each groove receives an O-ring that runs in contact with the sleeve when the shaft rotates. The sleeve, housing and O-rings define an annular chamber through which water is circulated to cool and lubricate the O-rings. The water is pressurized to cause the O-rings to deform and seal against the sleeve.

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“Seals and Sealing Handbook” by M. Brown, 4th Edition, 1995, ISBN # 1 84617 232 5.
“Mechanical Seals and Sealing Systems Handbook”, vol. 3 of “Pump Handbook” published in 1999 by AES Marketing Inc., available on internet at: http://www.pump-zone.com/handbook/handbook.htm.

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