Transmission and shift control

Details Transmission and shift control Transmission and shift control

1993-04-13

1994-10-25

Kwon, John T.

Machine element or mechanism

Gearing

Interchangeably locked

743375, F16H 5900

Patent

active

053578210

ABSTRACT:
A countershaft transmission and control has an input shaft, two countershafts and an output differential. Each countershaft has a fluid operated clutch connected therewith to selectively connect the respective countershaft with the output differential through reduction gearing. A plurality of drive and driven gear members are connected in meshing relation between the input shaft and the countershafts. Individually operable synchronizers are disposed on the countershafts to selectively engage the driven gears with the countershaft to establish gear ratios between the input shaft and the output differential. The synchronizers are operated by a control mechanism comprised of drive keys for selectively connecting synchronizer forks with a longitudinally movable shaft member. The control mechanism is also operable to provide a positive displacement pump assembly operated by the shaft member to deliver pressurized fluid to the clutch member for enforcing engagement thereof.

REFERENCES:
patent: 4565106 (1986-01-01), Sumiyoshi
patent: 4776227 (1988-10-01), Janiszewski
patent: 4777837 (1988-10-01), Lehle
patent: 5234090 (1993-08-01), Haka
patent: 5239880 (1993-08-01), Hawkins et al.

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