Fluid reaction surfaces (i.e. – impellers) – Specific working member mount – Blade received in well or slot
Reexamination Certificate
2007-06-12
2007-06-12
Look, Edward K. (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
Specific working member mount
Blade received in well or slot
C416S221000
Reexamination Certificate
active
10999978
ABSTRACT:
A rotor stage (13, 14, 15, 17, 18, 19) of a gas turbine engine (10) comprises an annular retaining plate (38) capable of preventing axial movement of blades (30). The retaining plate (38) is secured to the disc (32) via a bayonet arrangement (49). A locking assembly (48) is provided to prevent relative rotation between the disc (32) and the retaining plate (38). The locking assembly (48) comprises a locking plug (50) configured in a generally Y-shaped cross section having a channel portion defined by arms (56), which engage upstream and downstream of the retaining plate (38) and a leg part (58) configured to span between bayonet parts (40and42), thereby preventing relative rotation between the disc (32) and the retaining plate (38). The assembly (48) further comprises a securing plate (52) configured to span between circumferentially adjacent castellations (40) thereby preventing the locking plug (50) disengaging the disc (32) and retaining plate (38).
REFERENCES:
patent: 4019833 (1977-04-01), Gale
patent: 5622475 (1997-04-01), Hayner
patent: 5662458 (1997-09-01), Owen
patent: 1 096 107 (2001-05-01), None
patent: 928 349 SP (1963-06-01), None
patent: 2 058 945 (1981-04-01), None
patent: 2 226 367 (1990-06-01), None
Care Ian C D
Hermiston Brian
MacNamara Andrew
Udall Kenneth F
Look Edward K.
Manelli Denison & Selter PLLC
Rolls-Royce plc
Taltavull W. Warren
White Dwayne J
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