Rotary kinetic fluid motors or pumps – Bearing – seal – or liner between shaft or shaft sleeve and... – Seal
Reexamination Certificate
2006-08-04
2010-06-01
Verdier, Christopher (Department: 3745)
Rotary kinetic fluid motors or pumps
Bearing, seal, or liner between shaft or shaft sleeve and...
Seal
C415S174200, C277S413000, C277S415000, C277S416000, C277S421000, C277S543000, C277S924000, C029S424000, C029S447000, C029S523000
Reexamination Certificate
active
07726940
ABSTRACT:
Assembly of segmented seals can be problematic in areas of limited space for an introductory tapered mandrel and where there are the problems with damage to the seal surfaces23, 24. By the present method and arrangement, a seal formed from segments22is expanded to an expanded state and then retained at that state by the use of a sacrificial material26in the gaps25between the segments22opened by expansion. The sacrificial material26is typically a low melting temperature wax and so is removed when the seal arrangement reaches its operating temperature.
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Oliff & Berridg,e PLC
Rolls-Royce PLC
Verdier Christopher
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