Seal for a joint or juncture – Seal between relatively movable parts – Diverse and distinct dynamic seals
Reexamination Certificate
2005-04-19
2005-04-19
Pickard, Alison K. (Department: 3676)
Seal for a joint or juncture
Seal between relatively movable parts
Diverse and distinct dynamic seals
Reexamination Certificate
active
06880829
ABSTRACT:
A brush shroud assembly for reducing the tip clearance between a rotating blade and an engine casing is disclosed. The assembly includes a plurality of bristle packs supported within a housing such that the bristle distribution at the inner diameter of the bristle packs is substantially continuous. The continuous surface is created by mounting the bristles packs within a housing such that the packs are flared, i.e. width at the outer diameter of the bristle pack is smaller than that at the inner diameter. Various embodiments are disclosed for mounting the flared bristle packs to form a substantially continuous inner diameter. The bristle strips may be mounted in one or more annular rings, may be secured within one or more channels in the housing, the bristle packs may be formed into a tufted ring, or any of these may be utilized in combination with a backplate supporting an abradable seal, i.e. a hybrid design.
REFERENCES:
patent: 885032 (1908-04-01), DeFerranti
patent: 2349643 (1944-05-01), Wesemyer
patent: 2878048 (1959-03-01), Peterson
patent: 3917150 (1975-11-01), Ferguson et al.
patent: 3979920 (1976-09-01), Burgess et al.
patent: 4202554 (1980-05-01), Snell
patent: 4281838 (1981-08-01), Persson
patent: 4358120 (1982-11-01), Moore
patent: 4457515 (1984-07-01), Eidschun
patent: 4490877 (1985-01-01), Drumm
patent: 4541741 (1985-09-01), Woodbridge et al.
patent: 4679619 (1987-07-01), Wohrl et al.
patent: 4781388 (1988-11-01), Wohrl et al.
patent: 5066024 (1991-11-01), Reisinger et al.
patent: 5090710 (1992-02-01), Flower
patent: 5135237 (1992-08-01), Flower
patent: 5165758 (1992-11-01), Howe
patent: 5183197 (1993-02-01), Howe
patent: 5316318 (1994-05-01), Veau
patent: 5474305 (1995-12-01), Flower
patent: 5480160 (1996-01-01), Harms
patent: 5556172 (1996-09-01), Howe
patent: 5758879 (1998-06-01), Flower
patent: 5794938 (1998-08-01), Hofner et al.
patent: 5799952 (1998-09-01), Morrison et al.
patent: 6027121 (2000-02-01), Cromer et al.
patent: 6042119 (2000-03-01), Bagepalli et al.
patent: 6109616 (2000-08-01), Mayr
patent: 6120622 (2000-09-01), Mayr et al.
patent: 6139019 (2000-10-01), Dine et al.
patent: 6231047 (2001-05-01), Cunningham et al.
patent: 6267381 (2001-07-01), Wright
patent: 6293553 (2001-09-01), Werner et al.
patent: 6308957 (2001-10-01), Wright
patent: 6406027 (2002-06-01), Aksit et al.
patent: 6536773 (2003-03-01), Datta
patent: 0 293 140 (1988-11-01), None
patent: 0 866 248 (1998-09-01), None
patent: 0 961 058 (1999-01-01), None
patent: 379209 (1907-09-01), None
patent: 2 066 382 (1981-07-01), None
patent: WO 9853230 (1998-11-01), None
patent: WO 9906673 (1999-02-01), None
J. Short, A. Datta, J. Derby, R. England, R. Johnson, R. Loewenthal, B. Prior, P. Basu, “Brush Seal Development Program,” Defense Information Systems Agency, Defense Technical Information Center, Fort Belvoir, Virginia, (cover, pp. 1, 25 and 26). no date.
Advanced Components & Materials, Inc.
Bowditch & Dewey LLP
Pickard Alison K.
LandOfFree
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