Cartridge-type mechanical seal and back plate

Details Cartridge-type mechanical seal and back plate Cartridge-type mechanical seal and back plate

2006-05-16

2006-05-16

Peavey, Enoch E. (Department: 3673)

Seal for a joint or juncture

Seal between relatively movable parts

Close proximity seal

C277S418000, C277S419000, C277S420000

Reexamination Certificate

active

07044471

ABSTRACT:
A cartridge seal is co-axially secured within the circular aperture of a back plate bolted to a pump housing. Annular recesses are provided around inner and outer sides of the back plate, surrounding the circular aperture. The cartridge-type seal includes a stationary gland assembly and a rotatable shaft collar assembly. The inner side of the gland assembly includes a taper bore surrounding the pump drive shaft, and a circumferential lip. The lip nests within the inner annular recess of the back plate. The outer side of the gland assembly includes a circumferential groove. The collar assembly is locked to the drive shaft by means of setscrews. A snap-ring within the circumferential groove of the gland assembly is located within the outer side recess of the back plate. The snap-ring precludes axial movement of the gland assembly, while allowing quick removal and replacement of the cartridge seal.

REFERENCES:
patent: 5024451 (1991-06-01), Borowski
patent: 5290047 (1994-03-01), Duffee et al.
patent: 5662340 (1997-09-01), Besette et al.
patent: 6290234 (2001-09-01), Eberle et al.
patent: 6386546 (2002-05-01), Fedorovich
patent: 6471215 (2002-10-01), Drago et al.
Delta Mechanical Seals, Specification Sheet for “Delta Single Cartridge Seal, Style 3000”, Copyright 1997.
Delta Mechanical Seals, Specification Sheet for “Delta Single Stationary Bellows Cartridge Seal, Style 3100”, Copyright 1997.
Sunair Co., Advertising Brochure for “A.E.S. International Mechanical Seals For Pumps And Mixers”.
FLOWSERVE, Advertising Brochure for “ISC Series Seals Innovative Standard Cartridge”, Copyright Mar. 1999.
FLEX-A-SEAL, Advertising Brochure, “Sealing Solutions Worldwide”.
FLEX-A-SEAL, Advertising Brochure, “Integrated Cartridge System”.

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