Hydromechanical transmission

Details Hydromechanical transmission Hydromechanical transmission

1975-08-26

1977-02-22

Scott, Samuel

Machine element or mechanism

Elements

Gear casings

74766, 74760, 74740, 74681, F16H 4704, F16H 5710, F16H 3706

Patent

active

040086283

ABSTRACT:
A power transmission. Two planetary gear trains each having its own carrier and its own planet, sun, and ring gears, each providing an input member, an output member, and a reaction member. The input member of one gear train is connected to an input means, and the two input members of the two gear trains are interconnected so that both are driven by the input means. The reaction members of the two gear trains are also interconnected. The output members of the two gear trains are separately clutchable to an output means, and speed varying means cause one output member to increase its speed and simultaneously cause the other output member to decrease its speed, and vice versa. 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 being connected in driving relation to the input means, and the other being connected in driving relation to the reaction members.

REFERENCES:
patent: 864233 (1907-08-01), Easom et al.
patent: 2865231 (1958-12-01), Simpson

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