Machine element or mechanism – Elements – Gear casings
Patent
1977-04-15
1978-09-26
Scott, Samuel
Machine element or mechanism
Elements
Gear casings
747205, F16H 4704
Patent
active
041160894
ABSTRACT:
A power transmission having three planetary assemblies, each having its own carrier and its own planet, sun, and ring gears. A speed-varying module is connected in driving relation to the input shaft and in driving relationship to the three sun gears, all of which are connected together. The speed-varying means may comprise a pair of hydraulic units hydraulically interconnected so that one serves as a pump while the other serves as a motor and vice versa, one of the units having a variable stroke and being connected in driving relation to the input shaft, the other unit, which may have a fixed stroke, being connected in driving relation to the sun gears. The input shaft also drives the carrier of the third planetary assembly. A brake grounds the first carrier in the first range and in reverse and causes drive to be delivered to the output through the first ring gear in a hydrostatic mode. The carrier of the third planetary assembly drives the ring gear of the second planetary assembly, and a first clutching means connects the second carrier with the output in a second range, the brake for grounding the first carrier then being released. A second clutching means enables the third ring gear to drive the output shaft in a third range.
REFERENCES:
patent: 3863524 (1975-02-01), Mori et al.
patent: 3888139 (1975-06-01), Orshansky
patent: 3938604 (1976-02-01), Kugler et al.
Orshansky, Jr. deceased Elias
Weseloh William E.
McKenzie, Jr. Frank H.
Orshansky Transmission Corporation
Scott Samuel
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