Metal working – Method of mechanical manufacture – Prime mover or fluid pump making
Reexamination Certificate
2005-06-01
2010-11-09
Bryant, David P (Department: 3726)
Metal working
Method of mechanical manufacture
Prime mover or fluid pump making
C277S355000, C277S392000, C277S403000, C277S409000, C415S170100, C415S174200, C415S229000
Reexamination Certificate
active
07827685
ABSTRACT:
A seal and method of making seals utilises folds in order to form creases in a length of material such that the creases reinforce individual seal elements or surfaces whilst perforations or slots in a seal edge allow air leakage from one side of the seal element or surface to the other. Thus, air pressurisation can take place between spaced seal elements or surfaces and this allows air flotation or riding of a rotating component relative to a static housing component. The perforations are typically graduated from the seal edge in order to provide the best pressurisation and air-riding effect for proximity or gap control between the sealing edge and the rotating component surface. The slots effectively provide flexibility to the sealing edge such that the seal component emulates a brush seal.
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Bryant David P
Manelli Denison & Selter PLLC
Melcher Jeffrey S.
Rolls-Royce plc
Taousakis Alexander P
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