Machine element or mechanism – Gearing – Plural power paths to and/or from gearing
Patent
1987-02-25
1989-05-16
Braun, Leslie A.
Machine element or mechanism
Gearing
Plural power paths to and/or from gearing
74661, 74606R, 248554, F16H 3706, F16H 5702
Patent
active
048298506
ABSTRACT:
A dual engine drive system for a single propeller shaft includes a single torque-combining gearbox separated from the engines by gearbox input shafts. The engines, gearbox and propeller shaft are mounted as a unit on a common support frame adapted for installation in existing fixed-wing, single-engine aircraft. Each input shaft drives its own primary gear train within the gearbox. Each gear train includes its own output gear coupled to the propeller shaft through an overrunning clutch. An auxiliary drive train driven by the propeller shaft drives redundant propeller governors, an overspeed governor, and an oil pump for lubricating the propeller shaft and auxiliary gear train. The primary gear trains also drive oil pumps for lubricating their own gearbox sections. The three oil pumps are in separate subcircuits of a common oil circuit, and a mechanism is provided for enabling an operating oil pump of one subcircuit to supply oil to another subcircuit if the oil pump in such other circuit fails.
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Pulication re: Dauphin helicopter SA 365 (undated).
Publication re: Pratt & Whitney Model PW 209T (Information sheet undated).
Publication re: Pratt & Whitney Model PT6 Twin Pac (2 information sheets ) (undated).
Braun Leslie A.
Novais David
Soloy Dual Pac, Inc.
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