Machine element or mechanism – Elements – Gear casings
Patent
1977-04-15
1979-01-16
Scott, Samuel
Machine element or mechanism
Elements
Gear casings
74688, F16H 4704
Patent
active
041343107
ABSTRACT:
This transmission has a first planetary gear assembly having first input means connected to an input shaft, first output means, and first reaction means, and a second planetary gear assembly having second input means connected to the first input means, second output means, and second reaction means connected directly to the first reaction means by a reaction shaft. First clutch means, when engaged, connect the first output means to an output shaft in a high driving range. A hydrodynamic drive is used; for example, a torque converter, which may or may not have a stationary case, has a pump connected to the second output means, a stator grounded by an overrunning clutch to the case, and a turbine connected to an output member, and may be used in a starting phase. Alternatively, a fluid coupling or other type of hydrodynamic drive may be used. Second clutch means, when engaged, for connecting the output member to the output shaft in a low driving range. A variable-displacement hydraulic unit is mechanically connected to the input shaft, and a fixed-displacement hydraulic unit is mechanically connected to the reaction shaft. The hydraulic units are hydraulically connected together so that when one operates as a pump the other acts as a motor, and vice versa. Both clutch means are connected to the output shaft through a forward-reverse shift arrangement. It is possible to lock out the torque converter after the starting phase is over.
REFERENCES:
patent: 2885908 (1959-05-01), De Lorean
patent: 3500704 (1970-03-01), Muller et al.
patent: 3503281 (1970-03-01), Gsching et al.
patent: 3603176 (1971-09-01), Tipping et al.
patent: 3665787 (1972-05-01), Wilkinson
patent: 3709061 (1973-01-01), Orshansky, Jr.
patent: 3851544 (1974-12-01), Herman
Orshansky, Jr. deceased Elias
Weseloh William E.
Chandler Lance W.
Orshansky Transmission Corporation
Scott Samuel
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