Multi-speed transmission, especially for motor vehicles

Details Multi-speed transmission, especially for motor vehicles Multi-speed transmission, especially for motor vehicles

1971-08-04

1980-01-22

Scott, Samuel

Machine element or mechanism

Elements

Gear casings

74677, 74763, 74753, F16H 5710

Patent

active

041843860

ABSTRACT:
A multi-speed transmission, especially an automatic transmission for vehicles with at least three speeds, utilizing fluid circulations and force-lockingly operable engageable units for the shifting of the transmissions, especially with the use of epicyclic gears, in which the fluid circulations and the engageable units are so coordinated to the epicyclic gears providing the different transmission ratios that the engagement of the speeds under tractional force takes place exclusively by filling and/or emptying of fluid circulations as well as by release of the force-locking engageable units whereas an engagement of the force-locking units takes place only when the latter are not under tractional force whereby at least a part of the fluid circulations serves for the engagement of several speeds and the number thereof is smaller than the number of speeds engaged thereby.

REFERENCES:
patent: 2368873 (1945-02-01), Pollard
patent: 2437333 (1948-03-01), Pollard
patent: 2519022 (1950-08-01), Burtnett
patent: 2623407 (1952-12-01), Mayner
patent: 3209618 (1965-10-01), Schwab
patent: 3238813 (1966-03-01), Moan
patent: 3270587 (1966-09-01), Geray
patent: 3339431 (1967-09-01), Crosswhite et al.
patent: 3355967 (1967-12-01), Moan
patent: 3483771 (1969-12-01), Forster et al.
"Entirely New Hydra-Matic Drive has Two Fluid Couplings", in Automotive Industries, Nov. 1, 1955.
"Automatic Transmissions", by R. F. Ansdale in Autocar, Nov. 13, 1959.

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