Automatic transmission with overdrive

Details Automatic transmission with overdrive Automatic transmission with overdrive

1977-09-28

1980-05-20

Davis, Jr., Albert W.

Machine element or mechanism

Elements

Gear casings

74740, F16H 5702, F16H 3700

Patent

active

042033314

ABSTRACT:
An automatic transmission including: a torque converter having a pump impeller, stator vanes and turbine vanes; an overdrive gear mechanism whose input side is operably connected to the turbine vanes and transmits torque at a gear reduction ratio of 1 or less than 1; an oil pump having a pump chamber defined by an oil pump body and an oil pump cover and generating a hydraulic pressure; an underdrive gear mechanism operably coupled to the output side of the overdrive gear mechanism and transmitting torque at a gear reduction ratio of more than 1 from its input side to its output side; an overdrive case encompassing the overdrive gear mechanism in cooperation with the oil pump cover and having a hole or holes communicating the overdrive gear mechanism with the underdrive gear mechanism; and a transmission case encompassing the sides of the under drive gear mechanism in cooperation with the overdrive case. In this automatic transmission, the overdrive case is positioned between the torque converter and the transmission case, and a breather port provided in a front, top portion of the transmission case communicates a space within the overdrive gear mechanism or a space in the transmission case with the atmosphere.

REFERENCES:
patent: 3214989 (1965-11-01), Wellauer et al.
patent: 3533307 (1970-10-01), Gunderson

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