Seal for a joint or juncture – Seal between relatively movable parts – Diverse and distinct dynamic seals
Reexamination Certificate
2006-08-15
2006-08-15
Patel, Vishal (Department: 3673)
Seal for a joint or juncture
Seal between relatively movable parts
Diverse and distinct dynamic seals
C277S411000, C277S421000, C277S431000
Reexamination Certificate
active
07090220
ABSTRACT:
A cartridge type bearing seal facilitates the prevention of contaminant ingress between a spindle rotor and a spindle housing, particularly in situations where a circumferentially uniform fluid pressure is generated within the annular volume of the spindle housing. The cartridge includes ringlike rotor and stator sections which can be compressed axially to snap fit together, in a manner which enables relative rotation about a common axis. When interconnected, the sections define an inside surface and an outside surface, and a fluid flow path which extends radially outwardly therebetween, and which traverses a collar and tangs construction which enables the snap fit connection. The tangs are arcuate in shape and spaced equidistantly around the axis. The total arcuate space occupied by the tangs is relatively small, compared to the total arcuate space residing between the tangs, and bounded by the two sections adjacent the collar. This structure allows the pressurized purge fluid to flow outwardly from the cartridge during use, to prevent contaminant ingress during operation of the spindle. This construction may be readily adapted to accommodate a spindle of virtually any size or shape, at relatively low cost, and is particularly suitable for retrofitting an existing spindle which has experienced a failed seal.
REFERENCES:
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patent: 5522601 (1996-06-01), Murphy
patent: 5727095 (1998-03-01), Hoeting
patent: 5980115 (1999-11-01), Hoeting
patent: 6062568 (2000-05-01), Orlowski et al.
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patent: 0860637 (2001-12-01), None
Setco,SETCO Airshield, SETCO Sales Company, Publication S-0006-1, 2003.
Setco,SETCO “Universal” AirShield Spindle Seal System, SETCO Sales Company, Publication S-0008, 2002.
Effective Sealing of High Speed Rolling Bearings, Dr. Werner Haas, University of Stuttgart, publication date unknown.
Hodge Bobby L.
Hoeting Stephen C.
Patel Vishal
Setco Sales Co.
Wood Herron & Evans LLP
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