Transmission systems

Details Transmission systems Transmission systems

1982-06-15

1984-11-27

Krizmanich, George H.

Machine element or mechanism

Elements

Gear casings

74467, 74661, 74665A, 74410, 416 60, 416170R, 244 60, F16H 5702, B64D 3500, B64C 1100, B64C 2746

Patent

active

044844913

ABSTRACT:
A helicopter transmission system includes a gearbox comprising a gearcase (11) having a hollow stub axle (12) by which operational loads are transmitted from a main sustaining rotor to a fuselage structure. One or more input speed reducing gear trains (20, 21, 22, 23) are individually supported in hollow lobe portion(s) (14) supported from the axle (12), the or each lobe portion having an individual lubricating oil sump (18) and circulating means (31) adapted to circulate lubricating oil to the respective gear trains. Preferably, interconnecting means (33) are provided to connect the respective individual sumps, and valve means (32, 35) are adapted to maintain a flow of lubricating oil in the event of a loss of oil from one of the sumps.

REFERENCES:
patent: 1552859 (1925-09-01), Ljungstrom
patent: 2520887 (1950-08-01), Miller, Jr.
patent: 2771143 (1956-11-01), Campbell
patent: 3188884 (1965-06-01), Bancroft
patent: 3255825 (1966-06-01), Mouille et al.
patent: 3333482 (1967-08-01), Wildhaber
patent: 3374687 (1968-03-01), Vogt
patent: 4177693 (1979-12-01), Ivanko et al.
patent: 4216925 (1980-08-01), Mendiberri
patent: 4302154 (1981-11-01), Mack

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