Machine element or mechanism – Gearing – Plural power paths to and/or from gearing
Patent
1979-06-29
1981-03-10
Husar, C. J.
Machine element or mechanism
Gearing
Plural power paths to and/or from gearing
74674, 74801, 175106, F16H 3706, F16H 128, E21B 400
Patent
active
042546699
ABSTRACT:
A shaft transmission has coaxial tubular input and output shafts extending forwardly and backwardly from the transmission. Front and rear planet assemblies in the transmission include respective sun gears, planet carriers, and ring gears. The front planet carrier is fixed on an outer shaft enclosing the entire transmission. The rear sun gear is fixed rotationally to the input shaft. The rear planet carrier is fixed rotationally both to the front sun gear and to the output shaft. The rear ring gear is fixed rotationally to the front ring gear. Such a transmission divides the load between the front and rear planet assemblies while giving a substantial stepdown in the neighborhood of 4:1. In addition the input and output shafts form a throughgoing passage through which a fluid medium, such as drilling mud, can be passed.
REFERENCES:
patent: 1523629 (1925-01-01), Bullock
patent: 1786158 (1930-12-01), Hawes
patent: 1790460 (1931-01-01), Capeliuschnicoff
patent: 2488660 (1949-11-01), Conkle
patent: 2654572 (1953-10-01), Arutunoff
patent: 2937008 (1960-05-01), Whittle
patent: 3015973 (1962-01-01), Doerries
patent: 3143006 (1964-08-01), Kratochvil
patent: 3598188 (1971-08-01), Foster
patent: 3669199 (1972-06-01), Cullen et al.
patent: 4108023 (1978-08-01), Garrison
"Rotation-Speed Reducing Device for Turbodrills Slow Turbine," French Institute of Petroleum, 12/75.
Husar C. J.
Ross Karl F.
Thor Philip W.
Zahnradfabrik Friedrichshafen Aktiengesellschaft
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