Bearings – Rotary bearing – Plain bearing
Reexamination Certificate
2006-01-03
2006-01-03
Footland, Lenard A. (Department: 3682)
Bearings
Rotary bearing
Plain bearing
C384S911000, C384S913000
Reexamination Certificate
active
06981799
ABSTRACT:
A slide bearing for a centrifugal pump in which the slide bearing is lubricated by the pumped medium and is composed of a stationary part disposed in the housing of the centrifugal pump and a rotatable part which is supported by the shaft of the centrifugal pump and interacts with the stationary part to give a sliding pair. One part of the sliding pair is composed of a composite material, especially carbon fibers or silicon carbide fibers in a matrix of PEEK, carbon or carbon combined with silicon carbide. The other part of the sliding pair has a sliding surface made of a hard metal material and supported by a support material. A bond produced in the molten state is formed between the hard metal material of the sliding surface and the support material which supports the sliding surface of the other part of the slide bearing. The resulting slide bearing can be used in chloride-containing and/or corrosive media and has a sliding surface that is not prone to undercutting corrosion.
REFERENCES:
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patent: 5087529 (1992-02-01), Engel et al.
patent: 5795075 (1998-08-01), Watson
patent: 6467966 (2002-10-01), Diederich et al.
patent: 19524510 (1997-01-01), None
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patent: 2 204 250 (1974-05-01), None
“Tribaloy —eine-cershleiβ- und korrosionsbestäandige-Legierung”,Antriebstechnik 14, No. 8 (1975), p. 480.
Dwars Anja
Sehr Frank
Sturm Hans-Dieter
Crowell & Moring LLP
Footland Lenard A.
KSB Aktiengesellschaft
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